E21BEARTH DRILLING, e.g. DEEP DRILLING mining, quarrying E21C; making shafts, driving galleries or tunnels E21DOBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLSThe following IPC groups are not in the CPC scheme. The subject matter for these IPC groups is classified in the following CPC groups: E21B7/08 covered by E21B7/06E21B43/22 covered by C09K8/58In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme. E21B1/00Methods or apparatus for drilling E21B1/00Percussion drilling drives used in the borehole E21B4/00When classifying in groups E21B1/12 - E21B1/38, a symbol from one of the following main groups of B25D should also be given:B25D9/00 Portable percussive tools with fluid-pressure drivesB25D11/00 Portable percussive tools with motor driveB25D16/00 Portable percussive machines with superimposed rotationB25D17/00 Details of, or accessories for, portable power-driven percussive toolsGroup E21B1/00 is impacted by reclassification into groups E21B1/12, E21B1/14, E21B1/16, E21B1/18, E21B1/20, E21B1/22, E21B1/24, E21B1/26, E21B1/28, E21B1/30, E21B1/32, E21B1/34, E21B1/36, and E21B1/38.
All groups listed in this Warning should be considered in order to perform a complete search. E21B1/02Surface drives for drop hammers or percussion drilling, e.g. with a cableGroup E21B1/02 is incomplete pending reclassification of documents from group E21B1/12.
Group E21B1/02 is also impacted by reclassification into groups E21B1/04, E21B1/36 and E21B1/38.
All groups listed in this Warning should be considered in order to perform a complete search. E21B1/04Devices for reversing the movement of the rod or cable at the surfaceGroup E21B1/04 is incomplete pending reclassification of documents from groups E21B1/02 and E21B1/12.
All groups listed in this Warning should be considered in order to perform a complete search. E21B1/12with a reciprocating impulse member E21B1/02, E21B1/38 take precedenceGroup E21B1/12 is incomplete pending reclassification of documents from group E21B1/00.
Group E21B1/12 is also impacted by reclassification into groups E21B1/02, E21B1/04, E21B1/14, E21B1/16, E21B1/18, E21B1/20, E21B1/22, E21B1/24, E21B1/26, E21B1/28, E21B1/30, E21B1/32, E21B1/34 and E21B1/38.
All groups listed in this Warning should be considered in order to perform a complete search. E21B1/14driven by a rotating mechanismGroups E21B1/14 - E21B1/20 are incomplete pending reclassification of documents from groups E21B1/00 and E21B1/12.
All groups listed in this Warning should be considered in order to perform a complete search. E21B1/16with spring-mounted reciprocating masses, e.g. with air cushion E21B1/18with elastic joining of the drive to the push-rod by double buffer springs E21B1/20formed as centrifugal hammers E21B1/22driven by electromagnetsGroup E21B1/22 is incomplete pending reclassification of documents from groups E21B1/00 and E21B1/12.
All groups listed in this Warning should be considered in order to perform a complete search. E21B1/24the impulse member being a piston driven directly by fluid pressureGroups E21B1/24 - E21B1/34 are incomplete pending reclassification of documents from groups E21B1/00 and E21B1/12.
All groups listed in this Warning should be considered in order to perform a complete search. E21B1/26by liquid pressure E21B1/28working with pulses E21B1/30by air, steam or gas pressure E21B1/32working with pulses E21B1/34the impulse member being a piston of an internal-combustion engine E21B1/36Tool-carrier piston type, i.e. in which the tool is connected to an impulse memberGroup E21B1/36 is incomplete pending reclassification of documents from groups E21B1/00, E21B1/02 and E21B1/12.
All groups listed in this Warning should be considered in order to perform a complete search. E21B1/38Hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse memberGroup E21B1/38 is incomplete pending reclassification of documents from groups E21B1/00, E21B1/02 and E21B1/12.
All groups listed in this Warning should be considered in order to perform a complete search. E21B3/00Rotary drilling drives used in the borehole E21B4/00; rotary drilling machines in general B23BGroup E21B3/00 is impacted by reclassification into groups E21B3/02, E21B3/022, E21B3/025, E21B3/03, E21B3/035, E21B3/04, E21B3/045, and E21B3/06.
All groups listed in this Warning should be considered in order to perform a complete search. E21B3/02Surface drives for rotary drillingGroup E21B3/02 is incomplete pending reclassification of documents from group E21B3/00.
Group E21B3/02 is also impacted by reclassification into group E21B3/022.
Groups E21B3/00, E21B3/02, and E21B3/022 should be considered in order to perform a complete search. E21B3/022Top drivesGroup E21B3/022 is incomplete pending reclassification of documents from groups E21B3/00 and E21B3/02.
Groups E21B3/00, E21B3/02, and E21B3/022 should be considered in order to perform a complete search. E21B3/025with a to-and-fro rotation of the toolGroup E21B3/025 is incomplete pending reclassification of documents from group E21B3/00.
Groups E21B3/00 and E21B3/025 should be considered in order to perform a complete search. E21B3/03with an intermittent unidirectional rotation of the toolGroup E21B3/03 is incomplete pending reclassification of documents from group E21B3/00.
Groups E21B3/00 and E21B3/03 should be considered in order to perform a complete search. E21B3/035with slipping or elastic transmissionGroup E21B3/035 is incomplete pending reclassification of documents from group E21B3/00.
Groups E21B3/00 and E21B3/035 should be considered in order to perform a complete search. E21B3/04Rotary tables portable drilling rigs with rotary tables E21B7/021Groups E21B3/04 – E21B3/06 are incomplete pending reclassification of documents from group E21B3/00.
All groups listed in this Warning should be considered in order to perform a complete search. E21B3/045movably mounted on the drilling structure or platform derricks adapted to be moved on their substructure E21B15/003 E21B3/06Adaptation of rotary draw works to drive rotary tables connecting or disconnecting couplings or joints E21B19/16; rope, cable, or chain winding mechanisms, capstans B66D E21B4/00Drives for drilling, used in the borehole E21B4/003Bearing, sealing, lubricating details for roller bits E21B10/22 E21B4/006Mechanical motion converting means, e.g. reduction gearings E21B4/10 takes precedence E21B4/02Fluid rotary type drives hydraulic turbines for drilling wells F03B13/02 E21B4/04Electric drives E21B4/12 takes precedence E21B4/06Down-hole impacting means, e.g. hammers percussion drill bits E21B10/36; boring rams E21B11/02; releasing-jars E21B31/107 E21B4/08impact being obtained by gravity only, e.g. with lost-motion connection E21B4/10continuous unidirectional rotary motion of shaft or drilling pipe effecting consecutive impacts E21B4/12Electrically operated hammers E21B4/14Fluid operated hammers E21B4/145of the self propelled-type, e.g. with a reverse mode to retract the device from the hole E21B4/16Plural down-hole drives, e.g. for combined percussion and rotary drilling E21B4/10 takes precedenceDrives for multi-bit drilling units E21B4/18Anchoring or feeding in the borehole E21B4/20combined with surface drive E21B4/10 takes precedence E21B6/00Drives for drilling with combined rotary and percussive action drives used in the borehole E21B4/00; portable percussive machines with superimposed rotation B25D16/00 E21B6/02the rotation being continuous E21B6/04Separate drives for percussion and rotation E21B6/06the rotation being intermittent, e.g. obtained by ratchet device E21B6/08Separate drives for percussion and rotation E21B7/00Special methods or apparatus for drilling E21B7/001Drilling a non circular hole excavating trenches E02F5/02; cutting machines for slitting E21C25/00 E21B7/002Drilling with diversely driven shafts extending into the borehole simultaneously drilling and casing E21B7/20; plural down-hole drives E21B4/16; E21B7/001 takes precedence E21B7/003Drilling with mechanical conveying means tunnelling E21D E21B7/005with helical conveying means E21B7/201 takes precedence; augers E21B10/44; drilling rods or pipes with helical structure E21B17/22 E21B7/006combined with a bucket-type container E21B7/007Drilling by use of explosives underwater drilling using explosives E21B7/1245 E21B7/008Drilling ice or a formation covered by ice E21B7/02Drilling rigs characterized by means for land transport with their own drive, e.g. skid mounting or wheel mounting portable drilling rigs for use on underwater floors E21B7/124 E21B7/021With a rotary table, i.e. a fixed rotary drive for a relatively advancing tool E21B7/022Control of the drilling operation; Hydraulic or pneumatic means for activation or operation control circuits for drilling masts E21B15/045 E21B7/023the mast being foldable or telescopically retractable E21B7/024having means for adapting to inclined terrain; having means for stabilizing the vehicle while drilling E21B7/025Rock drills, i.e. jumbo drills E21B7/026having auxiliary platforms, e.g. for observation purposes E21B7/027Drills for drilling shallow holes, e.g. for taking soil samples or for drilling postholes E21B7/028the drilling apparatus being detachable from the vehicle, e.g. hand portable drillsGroup E21B7/028 is incomplete pending reclassification of documents from group E21B11/005.
Groups E21B11/005 and E21B7/028 should be considered in order to perform a complete search. E21B7/04Directional drilling derricks or masts specially adapted therefor E21B15/04 E21B7/043for underwater installations E21B7/046horizontal drilling drilling with mechanical conveying means E21B7/003 E21B7/06Deflecting the direction of boreholes E21B7/061the tool shaft advancing relative to a guide, e.g. a curved tube or a whipstock E21B7/062the tool shaft rotating inside a non-rotating guide travelling with the shaft E21B7/067 and E21B7/068 take precedence E21B7/064specially adapted drill bits therefor E21B7/065using oriented fluid jets E21B7/067with means for locking sections of a pipe or of a guide for a shaft in angular relation, e.g. adjustable bent sub E21B7/068drilled by a down-hole drilling motor down-hole drives per se E21B4/00, E21B7/067 takes precedence E21B7/10Correction of deflected boreholes E21B7/12Underwater drilling derricks or masts specially adapted therefor E21B15/02; telescoping joints E21B17/07; using heave compensators E21B19/09; well heads specially adapted for underwater installations E21B33/035 E21B7/122with submersible vertically movable guide E21B7/124with underwater tool drive prime mover, e.g. portable drilling rigs for use on underwater floors E21B7/1245using explosive means anchors driven in by explosive charges B63B21/28 E21B7/128from floating support with independent underwater anchored guide base E21B7/132from underwater buoyant support E21B7/136from non-buoyant support E21B7/124 takes precedence E21B7/14Drilling by use of heat, e.g. flame drilling E21B7/143underwater E21B7/146Thermal lances E21B7/15of electrically generated heat E21B7/16Applying separate balls or pellets by the pressure of the drill, so-called shot-drilling E21B7/18Drilling by liquid or gas jets, with or without entrained pellets E21B7/14 takes precedence; hydraulic monitors E21C45/00 E21B7/185underwater E21B7/20Driving or forcing casings or pipes into boreholes, e.g. sinkingSimultaneously drilling and casing boreholes surface means for applying to-and-fro rotation movements to the casing E21B3/025; placing piles E02D7/00; sinking shafts while moving the lining downwards E21D1/08 ; making galleries by forcing prefabricated elements through the ground E21D9/005 E21B7/201with helical conveying means E21B7/203using down-hole drives E21B7/205without earth removal E21B7/30 takes precedenceSpecial methods or apparatus for drilling without earth removal E21B7/26 E21B7/206using down-hole drives E21B7/208using down-hole drives E21B7/203 and E21B7/206 take precedence E21B7/24Drilling using vibrating or oscillating means, e.g. out-of-balance masses percussion drilling E21B1/00 E21B7/26Drilling without earth removal, e.g. with self-propelled burrowing devices E21B7/30 takes precedence; down-hole drives E21B4/00 , e.g. self-propelled fluid-operated hammers E21B4/145Group E21B7/26 is impacted by reclassification into group E21B7/267.
Groups E21B7/26 and E21B7/267 should be considered in order to perform a complete search. E21B7/265Combined with earth removalGroup E21B7/265 is impacted by reclassification into group E21B7/267.
Groups E21B7/265 and E21B7/267 should be considered in order to perform a complete search. E21B7/267Drilling devices with senders, e.g. radio-transmitters for position of drilling toolGroup E21B7/267 is incomplete pending reclassification of documents from groups E21B7/26 and E21B7/265.
Groups E21B7/26, E21B7/265, and E21B7/267 should be considered in order to perform a complete search. E21B7/28Enlarging drilled holes, e.g. by counterboring drill bits for enlarging the borehole E21B10/26 E21B7/30without earth removal E21B10/00Drilling tools E21B10/00Drill bits specially adapted for deflecting the direction of boring E21B7/064; with means for collecting substances E21B27/00 E21B10/003with cutting edges facing in opposite axial directions E21B10/006providing a cutting edge which is self-renewable during drilling E21B10/02Core bits characterised by wear resisting parts E21B10/46; obtaining undisturbed cores E21B25/00 E21B10/04with core destroying means E21B10/06Roller core bits E21B10/08Roller bits roller core bits E21B10/06; with leading portion E21B10/26; characterised by wear resisting parts E21B10/46 E21B10/083with longitudinal axis, e.g. wobbling or nutating roller bit longitudinal axis roller reamers E21B10/30 E21B10/086with excentric movement E21B10/10with roller axle supported at both ends with disc-cutters E21B10/12 E21B10/12with discs cutters E21B10/14combined with non-rolling cutters other than of leading-portion type E21B10/16characterised by tooth form or arrangement E21B10/18characterised by conduits or nozzles for drilling fluids drilling fluid supply to the bearings E21B10/23 E21B10/20characterised by detachable or adjustable parts, e.g. legs or axles cross axle roller bits E21B10/10 E21B10/22characterised by bearing, lubrication or sealing details E21B10/23with drilling fluid supply to the bearings E21B10/24characterised by lubricating details E21B10/246with pumping means for feeding lubricant E21B10/25characterised by sealing details E21B10/26Drill bits with leading portion, i.e. drill bits with a pilot cutterDrill bits for enlarging the borehole, e.g. reamers percussion drill bits with leading portion E21B10/40; augers with leading portion E21B10/44Group E21B10/26 is impacted by reclassification into group E21B10/265.
Groups E21B10/26 and E21B10/265 should be considered in order to perform a complete search. E21B10/265Bi-center drill bits, i.e. an integral bit and eccentric reamer used to simultaneously drill and underream the holeGroup E21B10/265 is incomplete pending reclassification of documents from groups E21B10/26, E21B10/28, E21B10/30, E21B10/32, E21B10/322, E21B10/325, E21B10/327, E21B10/34, and E21B10/345.
All groups listed in this Warning should be considered in order to perform a complete search. E21B10/28with non-expansible roller cuttersGroup E21B10/28 is impacted by reclassification into group E21B10/265.
Groups E21B10/28 and E21B10/265 should be considered in order to perform a complete search. E21B10/30Longitudinal axis roller reamers, e.g. reamer stabilisersGroup E21B10/30 is impacted by reclassification into group E21B10/265.
Groups E21B10/30 and E21B10/265 should be considered in order to perform a complete search. E21B10/32with expansible cutting toolsGroup E21B10/32 is impacted by reclassification into group E21B10/265.
Groups E21B10/32 and E21B10/265 should be considered in order to perform a complete search. E21B10/322cutter shifted by fluid pressure E21B10/345 takes precedenceGroup E21B10/322 is impacted by reclassification into group E21B10/265.
Groups E21B10/322 and E21B10/265 should be considered in order to perform a complete search. E21B10/325the cutter being shifted by a spring mechanismGroup E21B10/325 is impacted by reclassification into group E21B10/265.
Groups E21B10/325 and E21B10/265 should be considered in order to perform a complete search. E21B10/327the cutter being pivoted about a longitudinal axis E21B10/34 takes precedenceGroup E21B10/327 is impacted by reclassification into group E21B10/265.
Groups E21B10/327 and E21B10/265 should be considered in order to perform a complete search. E21B10/34of roller-cutter typeGroup E21B10/34 is impacted by reclassification into group E21B10/265.
Groups E21B10/34 and E21B10/265 should be considered in order to perform a complete search. E21B10/345cutter shifted by fluid pressureGroup E21B10/345 is impacted by reclassification into group E21B10/265.
Groups E21B10/345 and E21B10/265 should be considered in order to perform a complete search. E21B10/36Percussion drill bits with helical conveying portion E21B10/445; characterised by wear resisting parts E21B10/46 E21B10/38characterised by conduits or nozzles for drilling fluids E21B10/40with leading portion E21B10/42Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by wear resisting parts E21B10/54; by conduits or nozzles for drilling fluid E21B10/60; by detachable or adjustable parts E21B10/62Group E21B10/42 is impacted by reclassification into groups E21B10/62, E21B10/627, and E21B10/633.
All groups listed in this Warning should be considered in order to perform a complete search. E21B10/43characterised by the arrangement of teeth or other cutting elementsGroup E21B10/43 is impacted by reclassification into groups E21B10/62, E21B10/627, and E21B10/633.
All groups listed in this Warning should be considered in order to perform a complete search. E21B10/44Bits with helical conveying portion, e.g. screw type bitsAugers with leading portion or with detachable parts E21B10/42 takes precedence; drilling rods with helical structure E21B17/22 E21B10/445percussion type, e.g. for masonry E21B10/46characterised by wear resisting parts, e.g. diamond inserts E21B10/48the bit being of core type E21B10/485with inserts in form of chisels, blades or the like E21B10/50the bit being of roller type E21B10/52with chisel- or button-type inserts E21B10/54the bit being of the rotary drag type, e.g. fork-type bits E21B10/55with preformed cutting elements inserts per se E21B10/56, E21B10/58 E21B10/56Button-type inserts E21B10/52 takes precedence E21B10/567with preformed cutting elements mounted on a distinct support, e.g. polycrystalline insertsGroup E21B10/567 is impacted by reclassification into group E21B10/5671.
Groups E21B10/567 and E21B10/5671 should be considered in order to perform a complete search. E21B10/5671with chip breaking arrangementsGroup E21B10/5671 is incomplete pending reclassification of documents from groups E21B10/567 and E21B10/5673.
Groups E21B10/567, E21B10/5673, and E21B10/5671 should be considered in order to perform a complete search. E21B10/5673having a non planar or non circular cutting faceGroup E21B10/5673 is impacted by reclassification into group E21B10/5671.
Groups E21B10/5673 and E21B10/5671 should be considered in order to perform a complete search. E21B10/5676having a cutting face with different segments, e.g. mosaic-type inserts E21B10/573characterised by support details, e.g. the substrate construction or the interface between the substrate and the cutting element E21B10/5735Interface between the substrate and the cutting element E21B10/58Chisel-type inserts E21B10/485, E21B10/52, E21B10/54 take precedence E21B10/60characterised by conduits or nozzles for drilling fluids for roller bits E21B10/18; for percussion drill bits E21B10/38 E21B10/602the bit being a rotary drag type bit with blades E21B10/605the bit being a core-bit E21B10/61characterised by the nozzle structure E21B10/62characterised by parts, e.g. cutting elements, which are detachable or adjustable E21B10/64 takes precedence; for roller bits E21B10/20; for augers E21B10/44Groups E21B10/62 - E21B10/633 are incomplete pending reclassification of documents from groups E21B10/42 and E21B10/43.
All groups listed in this Warning should be considered in order to perform a complete search. E21B10/627with plural detachable cutting elements E21B10/633independently detachable E21B10/64characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe retrievable core receivers E21B25/02 E21B10/66the cutting element movable through the drilling pipe and laterally shiftable E21B11/00Other drilling toolsGroup E21B11/00 is impacted by reclassification into group E21B11/04.
Groups E21B11/00 and E21B11/04 should be considered in order to perform a complete search. E21B11/005Hand operated drilling tools hand portable tools detachable from portable drilling rigs E21B7/028Group E21B11/005 is impacted by reclassification into group E21B7/028.
Groups E21B11/005 and E21B7/028 should be considered in order to perform a complete search. E21B11/02Boring rams percussion drives used in the borehole E21B4/06; percussion drill bits E21B10/36 E21B11/04Boring grabsGroup E21B11/04 is incomplete pending reclassification of documents from groups E21B11/00 and E21B27/00.
Groups E21B11/00, E21B27/00, and E21B11/04 should be considered in order to perform a complete search. E21B11/06with driven cutting chains or similarly driven tools E21B12/00Accessories for drilling tools E21B12/02Wear indicators E21B12/04Drill bit protectors E21B12/06Mechanical cleaning devices E21B15/00Other equipment or details for drillingWell equipment or well maintenance E21B15/00Supports for the drilling machine, e.g. derricks or masts E21B15/003adapted to be moved on their substructure, e.g. with skidding means; adapted to drill a plurality of wells E21B15/006Means for anchoring the drilling machine to the ground E21B15/02specially adapted for underwater drilling E21B15/04 takes precedence; floating drilling platforms B63B35/44; drilling platforms on legs E02B17/00 E21B15/04specially adapted for directional drilling, e.g. slant hole rigs E21B15/045Hydraulic, pneumatic or electric circuits for their positioning E21B17/00Drilling rods or pipesFlexible drill stringsKelliesDrill collarsSucker rodsCables; CasingsTubings rod couplings in general F16D; tubes or tube couplings in general F16L E21B17/003with electrically conducting or insulating means E21B17/028 and E21B17/023 take precedence E21B17/006Accessories for drilling pipes, e.g. cleaners wear protectors E21B17/10; handling drilling pipes E21B19/00; thread protectors B65D59/00 E21B17/01Risers supporting a riser from a drilling or production platform E21B19/004; riser connectors on well heads E21B33/038 E21B17/012with buoyancy elements E21B17/015 takes precedence E21B17/015Non-vertical risers, e.g. articulated or catenary-type E21B17/017Bend restrictors for limiting stress on risers E21B17/02Couplingsjoints expandable couplings or joints E21B43/106Group E21B17/02 is impacted by reclassification into group E21B17/041.
Groups E21B17/02 and E21B17/041 should be considered in order to perform a complete search. E21B17/021Devices for subsurface connecting or disconnecting by rotation E21B17/023Arrangements for connecting cables or wirelines to downhole devices E21B17/025Side entry subs E21B17/026Arrangements for fixing cables or wirelines to the outside of downhole devices E21B17/028Electrical or electro-magnetic connectionsGroup E21B17/028 is impacted by reclassification into groups E21B17/0283 and E21B17/0285.
Groups E21B17/028, E21B17/0283, and E21B17/0285 should be considered in order to perform a complete search. E21B17/0283characterised by the coupling being contactless, e.g. inductiveGroup E21B17/0283 is incomplete pending reclassification of documents from group E21B17/028.
Groups E21B17/028 and E21B17/0283 should be considered in order to perform a complete search. E21B17/0285characterised by electrically insulating elementsGroup E21B17/0285 is incomplete pending reclassification of documents from group E21B17/028.
Groups E21B17/028 and E21B17/0285 should be considered in order to perform a complete search. E21B17/03between drilling rod or pipe and drill motor or surface drive, e.g. between drilling rod and hammer E21B17/04between rod or the like and bit or between rod and rod or the likeGroup E21B17/04 is impacted by reclassification into group E21B17/041.
Groups E21B17/04 and E21B17/041 should be considered in order to perform a complete search. E21B17/041specially adapted for coiled tubingGroup E21B17/041 is incomplete pending reclassification of documents from groups E21B17/02 and E21B17/04.
Groups E21B17/02, E21B17/04, and E21B17/041 should be considered in order to perform a complete search. E21B17/042Threaded E21B17/0423with plural threaded sections, e.g. with two-step threads E21B17/0426with a threaded cylindrical portion, e.g. for percussion rods E21B17/043with locking means E21B17/046with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catchesGroup E21B17/046 is impacted by reclassification into group E21B17/0465.
Groups E21B17/046 and E21B17/0465 should be considered in order to perform a complete search. E21B17/0465characterised by radially inserted locking elementsGroup E21B17/0465 is incomplete pending reclassification of documents from group E21B17/046.
Groups E21B17/046 and E21B17/0465 should be considered in order to perform a complete search. E21B17/05Swivel joints E21B17/06Releasing-joints, e.g. safety joints E21B17/07Telescoping joints for varying drill string lengthsShock absorbers heave compensators in the derrick E21B19/09; releasing-jars E21B31/107 E21B17/073with axial rotation E21B17/076between rod or pipe and drill bit E21B17/08Casing joints E21B17/085Riser connections connectors for wellhead E21B33/038Group E21B17/085 is impacted by reclassification into group E21B17/0853.
Groups E21B17/085 and E21B17/0853 should be considered in order to perform a complete search. E21B17/0853Connections between sections of riser provided with auxiliary lines, e.g. kill and choke linesGroup E21B17/0853 is incomplete pending reclassification of documents from group E21B17/085.
Groups E21B17/085 and E21B17/0853 should be considered in order to perform a complete search. E21B17/10Wear protectorsCentralising devices , e.g. stabilisers drives used in the borehole with anchoring means E21B4/18; guiding or centralising devices outside the borehole E21B19/24 E21B17/1007for the internal surface of a pipe, e.g. wear bushings for underwater well-heads E21B17/1014Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well E21B17/1042 takes precedence E21B17/1021with articulated arms or arcuate springs E21B17/1028with arcuate springs only, e.g. baskets with outwardly bowed strips for cementing operations E21B17/1035for plural rods, pipes or lines, e.g. for control lines E21B17/1042Elastomer protector or centering means E21B17/105split type E21B17/1057Centralising devices with rollers or with a relatively rotating sleeve E21B17/1014 takes precedence E21B17/1064Pipes or rods with a relatively rotating sleeve E21B17/1071specially adapted for pump rods, e.g. sucker rods E21B17/1078Stabilisers or centralisers for casing, tubing or drill pipes devices for off-center positioning E21B17/10; E21B17/1007 - E21B17/1064 take precedence E21B17/1085Wear protectors; Blast joints; Hard facing wear protection included in centralising devices, see relevant subgroups E21B17/1092Gauge section of drill bits E21B17/12Devices for placing or drawing out wear protectors E21B17/14Casing shoes for the protection of the bottom of the casing E21B17/16Drill collars E21B17/18Pipes provided with plural fluid passages E21B17/203 takes precedence; circulation of drilling fluid by means of such pipes E21B21/12 E21B17/20Flexible or articulated drilling pipes , e.g. flexible or articulated rods, pipes or cables E21B17/203with plural fluid passages E21B17/206with conductors, e.g. electrical, optical E21B17/22Rods or pipes with helical structure drill bits with helical conveying portion E21B10/44 E21B19/00Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrickApparatus for feeding the rods or cables surface drives E21B1/02, E21B3/02 E21B19/002specially adapted for underwater drilling E21B19/09, E21B19/143 take precedence E21B19/004supporting a riser from a drilling or production platform E21B19/006including heave compensators E21B19/008Winding units, specially adapted for drilling operations E21B19/02Rod or cable suspensions load-engaging elements for hoisting or lowering purposes in general B66C1/00; crown blocks or pulley blocks B66D; cable guides B66D1/36 E21B19/04Hooks E21B19/06Elevators, i.e. rod- or tube-gripping devices E21B19/07Slip-type elevators slips in rotary tables E21B19/10 E21B19/08Apparatus for feeding the rods or cables E21B19/22 takes precedence; automatic feed E21B44/02; hoisting drums B66DApparatus for increasing or decreasing the pressure on the drilling toolApparatus for counterbalancing the weight of the rodsGroup E21B19/08 is impacted by reclassification into groups E21B19/081, E21B19/083, E21B19/084, E21B19/086, E21B19/087, E21B19/089, and E21B19/09.
All groups listed in this Warning should be considered in order to perform a complete search. E21B19/081Screw-and-nut feed mechanismsGroup E21B19/081 is incomplete pending reclassification of documents from group E21B19/08.
Groups E21B19/08 and E21B19/081 should be considered in order to perform a complete search. E21B19/083Cam, rack or like feed mechanismsGroup E21B19/083 is incomplete pending reclassification of documents from group E21B19/08.
Groups E21B19/08 and E21B19/083 should be considered in order to perform a complete search. E21B19/084with flexible drawing means, e.g. cablesGroup E21B19/084 is incomplete pending reclassification of documents from group E21B19/08.
Groups E21B19/08 and E21B19/084 should be considered in order to perform a complete search. E21B19/086with a fluid-actuated cylinder E21B19/084, E21B19/087, E21B19/09 take precedenceGroup E21B19/086 is incomplete pending reclassification of documents from group E21B19/08.
Groups E21B19/08 and E21B19/086 should be considered in order to perform a complete search. E21B19/087by means of a swinging armGroup E21B19/087 is incomplete pending reclassification of documents from group E21B19/08.
Groups E21B19/08 and E21B19/087 should be considered in order to perform a complete search. E21B19/089with a spring or an additional weightGroup E21B19/089 is incomplete pending reclassification of documents from group E21B19/08.
Groups E21B19/08 and E21B19/089 should be considered in order to perform a complete search. E21B19/09specially adapted for drilling underwater formations from a floating support using heave compensators supporting the drill string drilling-pipe telescoping joints E21B17/07 ; heave compensators for supporting a riser E21B19/006Group E21B19/09 is incomplete pending reclassification of documents from group E21B19/08.
Groups E21B19/08 and E21B19/09 should be considered in order to perform a complete search. E21B19/10SlipsSpiders ; Catching devices rotary tables with master bushing or kelly bushing E21B3/04Group E21B19/10 is impacted by reclassification into group E21B19/102.
Groups E21B19/10 and E21B19/102 should be considered in order to perform a complete search. E21B19/102using rollers or spherical balls as load gripping elementsGroup E21B19/102 is incomplete pending reclassification of documents from group E21B19/10.
Groups E21B19/10 and E21B19/102 should be considered in order to perform a complete search. E21B19/12Rope clamps ; Rod, casings or tube clamps not secured to elevators rope clamps in general F16G11/00 E21B19/14Racks, ramps, troughs or bins, for holding the lengths of rod singly or connectedHandling between storage place and borehole E21B19/20, E21B19/22 take precedence E21B19/143specially adapted for underwater drilling E21B19/146Carousel systems, i.e. rotating rack systems E21B19/15Racking of rods in horizontal positionHandling between horizontal and vertical position E21B19/155Handling between horizontal and vertical position E21B19/16Connecting or disconnecting pipe couplings or joints E21B19/20 takes precedence; pipe wrenches or the like B25B E21B19/161using a wrench or a spinner adapted to engage a circular section of pipe E21B19/168 takes precedence E21B19/162cathead actuated E21B19/163piston-cylinder actuated E21B19/164motor actuated E21B19/162 and E21B19/163 take precedence E21B19/165Control or monitoring arrangements therefor E21B19/166Arrangements of torque limiters or torque indicators E21B19/167using a wrench adapted to engage a non circular section of pipe, e.g. a section with flats or splines E21B19/168using a spinner with rollers or a belt adapted to engage a well pipe E21B19/18Connecting or disconnecting drill bit and drilling pipe E21B19/20Combined feeding from rack and connecting, e.g. automatically E21B19/22Handling reeled pipe or rod units, e.g. flexible drilling pipes lifting or hauling appliances using two or more cooperating endless chains B66D3/003 E21B19/24Guiding or centralising devices for drilling rods or pipes E21B21/00Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor freeing objects stuck in boreholes by flushing E21B31/03; well drilling compositions C09K8/02Group E21B21/00 is impacted by reclassification into groups E21B21/001, E21B21/002, E21B21/003, E21B21/01, E21B21/012, E21B21/015, E21B21/019, E21B21/02, E21B21/06, E21B21/062, E21B21/063, E21B21/065, E21B21/066, E21B21/067, E21B21/068, E21B21/07, E21B21/08, E21B21/082, E21B21/085, E21B21/10, E21B21/103, E21B21/106, E21B21/12, E21B21/14, E21B21/16, and E21B21/18.
All groups listed in this Warning should be considered in order to perform a complete search. E21B21/001specially adapted for underwater drilling dual gradient drilling E21B21/082Group E21B21/001 is incomplete pending reclassification of documents from group E21B21/00.
Group E21B21/001 is also impacted by reclassification into group E21B21/082.
Groups E21B21/00, E21B21/001, and E21B21/082 should be considered in order to perform a complete search. E21B21/002Down-hole drilling fluid separation systems containers comprising collecting means with a strainer E21B27/005; subsoil filtering E21B43/02; down-hole production separators E21B43/38Group E21B21/002 is incomplete pending reclassification of documents from group E21B21/00.
Groups E21B21/00 and E21B21/002 should be considered in order to perform a complete search. E21B21/003Means for stopping loss of drilling fluid plastering the borehole wall E21B33/138Group E21B21/003 is incomplete pending reclassification of documents from group E21B21/00.
Groups E21B21/00 and E21B21/003 should be considered in order to perform a complete search. E21B21/01Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes arrangements for treating drilling fluids E21B21/06 ; waste disposal systems E21B41/005Group E21B21/01 is incomplete pending reclassification of documents from group E21B21/00.
Group E21B21/01 is also impacted by reclassification into group E21B21/019.
Groups E21B21/00, E21B21/01, and E21B21/019 should be considered in order to perform a complete search. E21B21/011Dust eliminating or dust removing while drilling E21B21/012using exhaust air from the drilling motor for blowing off the dust at the borehole entranceGroup E21B21/012 is incomplete pending reclassification of documents from group E21B21/00.
Groups E21B21/00 and E21B21/012 should be considered in order to perform a complete search. E21B21/013by liquids E21B21/0135Liquid flushing installations E21B21/014Preventing exhaust air from the drill motor from blowing-off towards the working face E21B21/015Means engaging the bore entrance, e.g. hoods for collecting dustGroup E21B21/015 is incomplete pending reclassification of documents from group E21B21/00.
Group E21B21/015 is also impacted by reclassification into group E21B21/019.
Groups E21B21/00, E21B21/015, and E21B21/019 should be considered in order to perform a complete search. E21B21/019Arrangements for maintaining circulation of drilling fluid while connecting or disconnecting tubular jointsGroup E21B21/019 is incomplete pending reclassification of documents from groups E21B21/00, E21B21/01, and E21B21/015.
All groups listed in this Warning should be considered in order to perform a complete search. E21B21/02Swivel joints in hose-linesGroup E21B21/02 is incomplete pending reclassification of documents from group E21B21/00.
Groups E21B21/00 and E21B21/02 should be considered in order to perform a complete search. E21B21/06Arrangements for treating drilling fluids outside the borehole treating steps per se, see the relevant subclassesGroups E21B21/06 - E21B21/07 are incomplete pending reclassification of documents from group E21B21/00.
All groups listed in this Warning should be considered in order to perform a complete search. E21B21/062by mixing components E21B21/063by separating components E21B21/065Separating solids from drilling fluids E21B21/066with further treatment of the solids, e.g. for disposal E21B21/067Separating gases from drilling fluids E21B21/068using chemical treatment E21B21/07for treating dust-laden gaseous fluids E21B21/08Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure valve arrangements therefor E21B21/10Group E21B21/08 is incomplete pending reclassification of documents from group E21B21/00.
Group E21B21/08 is also impacted by reclassification into groups E21B21/082 and E21B21/085.
All groups listed in this Warning should be considered in order to perform a complete search. E21B21/082Dual gradient systems, i.e. using two hydrostatic gradients or drilling fluid densitiesGroup E21B21/082 is incomplete pending reclassification of documents from groups E21B21/00, E21B21/001, and E21B21/08.
All groups listed in this Warning should be considered in order to perform a complete search. E21B21/085Underbalanced techniques, i.e. where borehole fluid pressure is below formation pressureGroup E21B21/085 is incomplete pending reclassification of documents from groups E21B21/00 and E21B21/08.
Groups E21B21/00, E21B21/08, and E21B21/085 should be considered in order to perform a complete search. E21B21/10Valve arrangements in drilling-fluid circulation systems valves in general F16KGroups E21B21/10 - E21B21/106 are incomplete pending reclassification of documents from group E21B21/00.
All groups listed in this Warning should be considered in order to perform a complete search. E21B21/103Down-hole by-pass valve arrangements, i.e. between the inside of the drill string and the annulus E21B21/106Valve arrangements outside the borehole, e.g. kelly valves E21B21/12using drilling pipes with plural fluid passages, e.g. closed circulation systems pipes with plural fluid passages E21B17/18Group E21B21/12 is incomplete pending reclassification of documents from group E21B21/00.
Groups E21B21/00 and E21B21/12 should be considered in order to perform a complete search. E21B21/14using liquids and gases, e.g. foamsGroup E21B21/14 is incomplete pending reclassification of documents from group E21B21/00.
Groups E21B21/00 and E21B21/14 should be considered in order to perform a complete search. E21B21/16using gaseous fluids E21B21/14 takes precedence; arrangements for handling drilling fluids outside the borehole E21B21/01; arrangements for treating drilling fluids E21B21/06Group E21B21/16 is incomplete pending reclassification of documents from group E21B21/00.
Groups E21B21/00 and E21B21/16 should be considered in order to perform a complete search. E21B21/18Preventing exhaust air from the drill motor from blowing-off towards the working faceGroup E21B21/18 is incomplete pending reclassification of documents from group E21B21/00.
Groups E21B21/00 and E21B21/18 should be considered in order to perform a complete search. E21B23/00Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells setting of casings, screens or liners E21B43/10 E21B23/001Self-propelling systems or apparatus, e.g. for moving tools within the horizontal portion of a borehole E21B23/004Indexing systems for guiding relative movement between telescoping parts of downhole tools E21B23/006"J-slot" systems, i.e. lug and slot indexing mechanisms E21B23/01for anchoring the tools or the like E21B23/02 - E21B23/06 take precedence; anchoring of drives in the borehole E21B4/18 E21B23/02for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing E21B23/03 - E21B23/06 take precedence E21B23/03for setting the tools into, or removing the tools from, laterally offset landing nipples or pocketsGroup E21B23/03 is impacted by reclassification into group E21B23/12.
Groups E21B23/03 and E21B23/12 should be considered in order to perform a complete search. E21B23/04operated by fluid means, e.g. actuated by explosion E21B23/06, E21B23/08 take precedenceGroup E21B23/04 is impacted by reclassification into groups E21B23/0411, E21B23/04115, E21B23/0412, E21B23/0413, E21B23/0414, E21B23/0415, E21B23/0416, E21B23/0417, E21B23/0418, E21B23/0419, E21B23/042, E21B23/0421, E21B23/0422, E21B23/0423, and E21B34/142.
All groups listed in this Warning should be considered in order to perform a complete search. E21B23/0411specially adapted for anchoring tools or the like to the borehole wall or to well tubeGroup E21B23/0411 is incomplete pending reclassification of documents from group E21B23/04.
Groups E21B23/04 and E21B23/0411 should be considered in order to perform a complete search. E21B23/04115using radial pistonsGroup E21B23/04115 is incomplete pending reclassification of documents from group E21B23/04.
Groups E21B23/04 and E21B23/04115 should be considered in order to perform a complete search. E21B23/0412characterised by pressure chambers, e.g. vacuum chambersGroup E21B23/0412 is incomplete pending reclassification of documents from group E21B23/04.
Groups E21B23/04 and E21B23/0412 should be considered in order to perform a complete search. E21B23/0413using means for blocking fluid flow, e.g. drop balls or darts using balls or the like for actuating downhole valves E21B34/142Group E21B23/0413 is incomplete pending reclassification of documents from group E21B23/04.
Groups E21B23/04 and E21B23/0413 should be considered in order to perform a complete search. E21B23/0414using explosivesGroup E21B23/0414 is incomplete pending reclassification of documents from group E21B23/04.
Groups E21B23/04 and E21B23/0414 should be considered in order to perform a complete search. E21B23/0415using particular fluids, e.g. electro-active liquidsGroup E21B23/0415 is incomplete pending reclassification of documents from group E21B23/04.
Groups E21B23/04 and E21B23/0415 should be considered in order to perform a complete search. E21B23/0416characterised by force amplification arrangementsGroup E21B23/0416 is incomplete pending reclassification of documents from group E21B23/04.
Groups E21B23/04 and E21B23/0416 should be considered in order to perform a complete search. E21B23/0417Down-hole non-explosive gas generating means, e.g. by chemical reactionGroup E21B23/0417 is incomplete pending reclassification of documents from group E21B23/04.
Groups E21B23/04 and E21B23/0417 should be considered in order to perform a complete search. E21B23/0418specially adapted for locking the tools in landing nipples or recessesGroup E21B23/0418 is incomplete pending reclassification of documents from group E21B23/04.
Groups E21B23/04 and E21B23/0418 should be considered in order to perform a complete search. E21B23/0419using down-hole motor and pump arrangements for generating hydraulic pressureGroup E21B23/0419 is incomplete pending reclassification of documents from group E21B23/04.
Groups E21B23/04 and E21B23/0419 should be considered in order to perform a complete search. E21B23/042using a single piston or multiple mechanically interconnected pistonsGroup E21B23/042 is incomplete pending reclassification of documents from group E21B23/04.
Groups E21B23/04 and E21B23/042 should be considered in order to perform a complete search. E21B23/0421using multiple hydraulically interconnected pistonsGroup E21B23/0421 is incomplete pending reclassification of documents from group E21B23/04.
Groups E21B23/04 and E21B23/0421 should be considered in order to perform a complete search. E21B23/0422characterised by radial pistons using radial pistons for anchoring E21B23/04115Group E21B23/0422 is incomplete pending reclassification of documents from group E21B23/04.
Groups E21B23/04 and E21B23/0422 should be considered in order to perform a complete search. E21B23/0423using step motorsGroup E21B23/0423 is incomplete pending reclassification of documents from group E21B23/04.
Groups E21B23/04 and E21B23/0423 should be considered in order to perform a complete search. E21B23/06for setting packers E21B23/065setting tool actuated by explosion or gas generating means E21B23/08Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems special provisions on heads therefor E21B33/068; cementing plugs E21B33/16; scrapers operated by fluid pressure E21B37/04 E21B23/10Tools specially adapted therefor E21B23/12Tool divertersGroup E21B23/12 is incomplete pending reclassification of documents from group E21B23/03.
Groups E21B23/03 and E21B23/12 should be considered in order to perform a complete search. E21B23/14for displacing a cable or cable-operated tool, e.g. for logging or perforating operations in deviated wells by fluid pressure E21B23/08; provision on well heads for introducing or removing cable-operated tools E21B33/072, E21B33/076 E21B25/00Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors core bits E21B10/02; using explosives or projectiles in boreholes E21B49/04; side-wall sampling or coring E21B49/06 E21B25/005Above ground means for handling the core, e.g. for extracting the core from the core barrel E21B25/02the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe retrievable drill bits E21B10/64 E21B25/04the core receiver having a core forming cutting edge or element, e.g. punch type core barrels E21B25/06the core receiver having a flexible liner or inflatable retaining means E21B25/08Coating, freezing, consolidating cores E21B25/06 takes precedenceRecovering uncontaminated cores or cores at formation pressure E21B25/10Formed core retaining or severing means E21B25/06, E21B25/08 take precedence E21B25/12of the sliding wedge type E21B25/14mounted on pivot transverse to core axis E21B25/16for obtaining oriented cores E21B25/18the core receiver being specially adapted for operation under water E21B27/00Containers for collecting or depositing substances in boreholes or wells, e.g. bailers, baskets or buckets for collecting mud or sandDrill bits with means for collecting substances, e.g. valve drill bitsGroup E21B27/00 is impacted by reclassification into groups E21B11/04 and E21B31/08.
Groups E21B27/00, E21B11/04, and E21B31/08 should be considered in order to perform a complete search. E21B27/005Collecting means with a strainer E21B27/02Dump bailers, i.e. containers for depositing substances, e.g. cement or acids E21B27/04where the collecting or depositing means include helical conveying means drilling with helical conveying means combined with bucket-type container E21B7/006 E21B28/00Vibration generating arrangements for boreholes or wells, e.g. for stimulating production for drilling E21B7/24; for fishing for or freeing objects E21B31/005; for transmitting measuring-signals E21B47/14; for geophysical measurements G01V1/02 E21B29/00Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows perforators E21B43/11Deforming of pipes in boreholes or wellsReconditioning of well casings while in the ground by enlarging drilled holes or counterboring E21B7/28 E21B29/002Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe E21B29/005with a radially-expansible cutter rotating inside the pipe, e.g. for cutting an annular window E21B29/007with a radially-retracting cutter rotating outside the pipe E21B29/02by explosives or by thermal or chemical means freeing stuck objects by explosives E21B31/002; destroying objects in boreholes or wells by explosives E21B31/16 E21B29/04Cutting of wire lines or the like E21B29/02 takes precedence E21B29/06Cutting windows, e.g. directional window cutters for whipstock operations E21B29/005 and E21B29/08 take precedence E21B29/08Cutting or deforming pipes to control fluid flow shear type blow-out preventers E21B33/063 E21B29/10Reconditioning of well casings, e.g. straightening E21B29/12specially adapted for underwater installations E21B29/08 takes precedence E21B31/00Fishing for or freeing objects in boreholes or wells provisions on well heads for introducing or removing objects E21B33/068; locating or determining the position of objects in boreholes or wells E21B47/09Group E21B31/00 is impacted by reclassification into group E21B31/08.
Groups E21B31/00 and E21B31/08 should be considered in order to perform a complete search. E21B31/002Destroying the objects to be fished, e.g. by explosive means E21B31/005using vibrating or oscillating means E21B31/007fishing tools with means for attaching comprising fusing or sticking E21B31/03Freeing by flushingGroup E21B31/03 is impacted by reclassification into group E21B31/035.
Groups E21B31/03 and E21B31/035 should be considered in order to perform a complete search. E21B31/035controlling differential pipe stickingGroup E21B31/035 is incomplete pending reclassification of documents from group E21B31/03.
Groups E21B31/03 and E21B31/035 should be considered in order to perform a complete search. E21B31/06using magnetic means E21B31/08using junk baskets or the likeGroup E21B31/08 is incomplete pending reclassification of documents from groups E21B27/00 and E21B31/00.
Groups E21B27/00, E21B31/00, and E21B31/08 should be considered in order to perform a complete search. E21B31/107using impact means for releasing stuck parts, e.g. jars telescoping joints E21B17/07 E21B31/1075using explosives E21B31/113hydraulically-operated E21B31/1135Jars with a hydraulic impedance mechanism, i.e. a restriction, for initially delaying escape of a restraining fluid E21B31/12Grappling tools, e.g. tongs or grabs E21B31/125specially adapted for parted wire line or ropes E21B31/14with means deflecting the direction of the tool, e.g. by use of knuckle joints apparatus for deflecting the boring E21B7/06 E21B31/16combined with cutting or destroying means cutting or destroying means per se E21B29/00 E21B31/18gripping externally, e.g. overshot E21B31/20gripping internally, e.g. fishing spears E21B33/00Sealing or packing boreholes or wellsGroup E21B33/00 is impacted by reclassification into groups E21B2200/00, E21B2200/01, E21B2200/02, E21B2200/03, E21B2200/04, E21B2200/05, E21B2200/06, E21B2200/08, E21B2200/09, E21B2200/20, and E21B2200/22.
All groups listed in this Warning should be considered in order to perform a complete search. E21B33/02Surface sealing or packing E21B33/03Well headsSetting-up thereof valve arrangements therefor E21B34/02 E21B33/035specially adapted for underwater installations E21B33/043, E21B33/064, E21B33/076 take precedenceGroup E21B33/035 is impacted by reclassification into groups E21B33/0353 and E21B33/0387.
Groups E21B33/035, E21B33/0353, and E21B33/0387 should be considered in order to perform a complete search. E21B33/0353Horizontal or spool trees, i.e. without production valves in the vertical main boreGroup E21B33/0353 is incomplete pending reclassification of documents from groups E21B33/035, E21B33/0355, E21B33/037, E21B33/0375, E21B33/038, E21B33/0385, and E21B33/0422.
All groups listed in this Warning should be considered in order to perform a complete search. E21B33/0355Control systems, e.g. hydraulic, pneumatic, electric, acoustic, for submerged well headsGroup E21B33/0355 is impacted by reclassification into group E21B33/0353.
Groups E21B33/0355 and E21B33/0353 should be considered in order to perform a complete search. E21B33/037Protective housings thereforGroup E21B33/037 is impacted by reclassification into group E21B33/0353.
Groups E21B33/037 and E21B33/0353 should be considered in order to perform a complete search. E21B33/0375Corrosion protection meansGroup E21B33/0375 is impacted by reclassification into group E21B33/0353.
Groups E21B33/0375 and E21B33/0353 should be considered in order to perform a complete search. E21B33/038Connectors used on well heads, e.g. for connecting blow-out preventer and riser connecting a production flow-line to an underwater well head E21B43/013Group E21B33/038 is impacted by reclassification into group E21B33/0353.
Groups E21B33/038 and E21B33/0353 should be considered in order to perform a complete search. E21B33/0385electrical connectorsGroup E21B33/0385 is impacted by reclassification into group E21B33/0353.
Groups E21B33/0385 and E21B33/0353 should be considered in order to perform a complete search. E21B33/0387Hydraulic stab connectorsGroup E21B33/0387 is incomplete pending reclassification of documents from group E21B33/035.
Groups E21B33/035 and E21B33/0387 should be considered in order to perform a complete search. E21B33/04Casing headsSuspending casings or tubings in well heads setting of casings in wells E21B43/10 E21B33/0407with a suspended electrical cable E21B33/0415rotating or floating support for tubing or casing hanger E21B33/0422a suspended tubing or casing being gripped by a slip or an internally serrated memberGroup E21B33/0422 is impacted by reclassification into group E21B33/0353.
Groups E21B33/0422 and E21B33/0353 should be considered in order to perform a complete search. E21B33/043specially adapted for underwater well heads E21B33/0407, E21B33/047 take precedence E21B33/047for plural tubing strings E21B33/05Cementing-heads, e.g. having provision for introducing cementing plugs E21B33/06Blow-out preventers , i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers rotating blow-out preventers E21B33/085 E21B33/061Ram-type blow-out preventers, e.g. with pivoting rams E21B33/062with sliding rams E21B33/063for shearing drill pipes cutting of wireline E21B29/04 E21B33/064specially adapted for underwater well heads control systems for submerged well-heads E21B33/0355; connectors therefor E21B33/038 E21B33/068having provision for introducing objects or fluids into, or removing objects from, wells cementing heads E21B33/05 ; wipers, oil savers E21B33/08 E21B33/072for cable-operated tools E21B33/076 takes precedence E21B33/076specially adapted for underwater installations E21B33/08WipersOil savers E21B33/085Rotatable packing means, e.g. rotating blow-out preventers E21B33/10in the borehole sealing the junction between main bore and laterals E21B41/0042 E21B33/12PackersPlugs used for cementing E21B33/134, E21B33/16 E21B33/1204permanent; drillable E21B33/1208characterised by the construction of the sealing or packing means E21B33/1277 takes precedence E21B33/1212including a metal-to-metal seal element E21B33/1216Anti-extrusion means, e.g. means to prevent cold flow of rubber packing E21B33/122Multiple string packers E21B33/124Units with longitudinally-spaced plugs for isolating the intermediate space E21B33/1243with inflatable sleeves E21B33/1246inflated by down-hole pumping means operated by a pipe string E21B33/126with fluid-pressure-operated elastic cup or skirt E21B33/122, E21B33/124 take precedence E21B33/1265with mechanical slips E21B33/127with inflatable sleeve E21B33/122, E21B33/124 take precedence E21B33/1272inflated by down-hole pumping means operated by a pipe string E21B33/1275inflated by down-hole pumping means operated by a down-hole drive E21B33/1277characterised by the construction or fixation of the sleeve E21B33/128with a member expanded radially by axial pressure E21B33/122, E21B33/124 , E21B33/129 take precedence ; characterised by the construction of the sealing means E21B33/1208 E21B33/1285by fluid pressure E21B33/129with mechanical slips for hooking into the casing E21B33/122, E21B33/124 take precedence E21B33/1291anchor set by wedge or cam in combination with frictional effect, using so-called drag-blocks E21B33/1295 takes precedence E21B33/1292with means for anchoring against downward and upward movement E21B33/1293with means for anchoring against downward and upward movement E21B33/1291, E21B33/1295 take precedence E21B33/1294characterised by a valve, e.g. a by-pass valve E21B33/1295actuated by fluid pressure E21B33/12955using drag blocks frictionally engaging the inner wall of the well E21B33/13Methods or devices for cementing, for plugging holes, crevices, or the like dump bailers E21B27/02; chemical compositions therefor C09K8/00 E21B33/134Bridging plugs E21B33/136Baskets, e.g. of umbrella type E21B33/138Plastering the borehole wallInjecting into the formation packers E21B33/12 E21B33/14for cementing casings into boreholes control of cementation quality or level E21B47/005 E21B33/143for underwater installations E21B33/146Stage cementing, i.e. discharging cement from casing at different levels E21B33/16using plugs for isolating cement chargePlugs therefor stage cementing E21B33/146; spacer compositions C09K8/424Group E21B33/16 is impacted by reclassification into groups E21B33/165 and E21B33/167.
Groups E21B33/16, E21B33/165, and E21B33/167 should be considered in order to perform a complete search. E21B33/165Cementing plugs specially adapted for being released down-hole cementing heads E21B33/05Group E21B33/165 is incomplete pending reclassification of documents from group E21B33/16.
Groups E21B33/16 and E21B33/165 should be considered in order to perform a complete search. E21B33/167Cementing plugs provided with anti-rotation mechanisms, e.g. for easier drill-outGroup E21B33/167 is incomplete pending reclassification of documents from group E21B33/16.
Groups E21B33/16 and E21B33/167 should be considered in order to perform a complete search. E21B34/00Valve arrangements for boreholes or wells in drilling fluid circulation systems E21B21/10; blow-out preventers E21B33/06; oil flow regulating apparatus E21B43/12; valves in general F16K E21B34/02in well headsGroup E21B34/02 is impacted by reclassification into group E21B34/025.
Groups E21B34/02 and E21B34/025 should be considered in order to perform a complete search. E21B34/025Chokes or valves in wellheads and sub-sea wellheads for variably regulating fluid flowGroup E21B34/025 is incomplete pending reclassification of documents from groups E21B34/02, E21B34/04, and E21B34/045.
All groups listed in this Warning should be considered in order to perform a complete search. E21B34/04in underwater well headsGroup E21B34/04 is impacted by reclassification into group E21B34/025.
Groups E21B34/04 and E21B34/025 should be considered in order to perform a complete search. E21B34/045adapted to be lowered on a tubular string into position within a blow-out preventer stack, e.g. so-called test treesGroup E21B34/045 is impacted by reclassification into group E21B34/025.
Groups E21B34/045 and E21B34/025 should be considered in order to perform a complete search. E21B34/06in wells E21B34/063Valve or closure with destructible element, e.g. frangible disc E21B34/103 takes precedence E21B34/066electrically actuated E21B34/08responsive to flow or pressure of the fluid obtained E21B34/10 takes precedence E21B34/085with time-delay systems, e.g. hydraulic impedance mechanisms E21B34/10operated by control fluid supplied from outside the borehole by a dropped ball or piston E21B34/142; control means being outside the borehole E21B34/16 E21B34/101with means for equalizing fluid pressure above and below the valve E21B34/102with means for locking the closing element in open or closed position E21B34/105 and E21B34/108 take precedence E21B34/103with a shear pin E21B34/105retrievable, e.g. wire line retrievable, i.e. with an element which can be landed into a landing-nipple provided with a passage for control fluid E21B34/106the retrievable element being a secondary control fluid actuated valve landed into the bore of a first inoperative control fluid actuated valve E21B34/107the retrievable element being an operating or controlling means retrievable separately from the closure member, e.g. pilot valve landed into a side pocket E21B34/106 takes precedence E21B34/108with time delay systems, e.g. hydraulic impedance mechanisms E21B34/12operated by movement of casings or tubings E21B34/125with time delay systems, e.g. hydraulic impedance mechanisms E21B34/14operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools E21B34/066 takes precedenceGroup E21B34/14 is impacted by reclassification into group E21B34/142.
Groups E21B34/14 and E21B34/142 should be considered in order to perform a complete search. E21B34/142unsupported or free-falling elements, e.g. balls, plugs, darts or pistonsGroup E21B34/142 is incomplete pending reclassification of documents from groups E21B23/04 and E21B34/14.
Groups E21B23/04, E21B34/14, and E21B34/142 should be considered in order to perform a complete search. E21B34/16Control means therefor being outside the borehole control systems for submerged well heads E21B33/0355 E21B35/00Methods or apparatus for preventing or extinguishing fires cutting or deforming pipes to control fluid flow E21B29/08; controlling flow of fluid to or in wells E21B43/12; fire fighting in general A62C, A62D E21B36/00Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones drilling by use of heat E21B7/14; secondary recovery methods using heat E21B43/24 E21B36/001Cooling arrangements E21B36/003Insulating arrangements E21B36/005Heater surrounding production tube E21B36/006Combined heating and pumping means E21B36/008using chemical heat generating means E21B36/02using burners E21B36/025the burners being above ground or outside the bore hole E21B36/04using electrical heaters E21B37/00Methods or apparatus for cleaning boreholes or wells E21B21/00 takes precedence; bailers E21B27/00; cleaning pipes in general B08B9/02 E21B37/02Scrapers specially adapted therefor E21B37/04operated by fluid pressure, e.g. free-piston scrapers operating other tools by fluid pressure E21B23/08 E21B37/045Free-piston scrapers E21B37/06using chemical means for preventing, limiting or eliminating the deposition of paraffins or like substances chemical compositions therefor C09K8/52 E21B37/08cleaning in situ of down-hole filters, screens, e.g. casing perforations, or gravel packs E21B37/06 takes precedence E21B37/10Well swabs E21B40/00Tubing catchers, automatically arresting the fall of oil-well tubing preventing small objects from falling into the borehole E21B41/0021Group E21B40/00 is impacted by reclassification into group E21B40/001.
Groups E21B40/00 and E21B40/001 should be considered in order to perform a complete search. E21B40/001in the borehole anchoring tools in the borehole E21B23/01Group E21B40/001 is incomplete pending reclassification of documents from group E21B40/00.
Groups E21B40/00 and E21B40/001 should be considered in order to perform a complete search. E21B41/00Equipment or details not covered by groups E21B15/00 - E21B40/00Group E21B41/00 is incomplete pending reclassification of documents from group E21B41/0092.
Group E21B41/00 is also impacted by reclassification into group E21B41/0099.
Groups E21B41/0092, E21B41/00, and E21B41/0099 should be considered in order to perform a complete search. E21B41/0007for underwater installations E21B41/005, E21B41/04, E21B41/06, E21B41/08, E21B41/10 take precedence E21B41/0014Underwater well locating or reentry systems E21B41/0021Safety devices, e.g. for preventing small objects from falling into the borehole E21B41/0035Apparatus or methods for multilateral well technology, e.g. for the completion of or workover on wells with one or more lateral branches E21B41/0042characterised by sealing the junction between a lateral and a main bore E21B41/005Waste disposal systems E21B41/0057Disposal of a fluid by injection into a subterranean formation E21B41/0064Carbon dioxide sequestration storing fluids in porous layers B65G5/005 E21B41/0071Adaptation of flares, e.g. arrangements of flares in offshore installations flares of waste gases or noxious gases F23G7/08 E21B41/0078Nozzles used in boreholes drilling by liquid or gas jets E21B7/18; drill bits with nozzles E21B10/60; perforators using direct fluid action E21B43/114; obtaining a slurry of minerals using nozzles E21B43/29 E21B41/0085Adaptations of electric power generating means for use in boreholes E21B41/0092Methods relating to program engineering, design or optimisationGroup E21B41/0092 is no longer used for the classification of documents as of 2020-05-01.
The content of this group is being reclassified into groups E21B41/00, E21B43/00, E21B43/16, and G06Q10/06.
All groups listed in this Warning should be considered in order to perform a complete search. E21B41/0099specially adapted for drilling for or production of natural hydrate or clathrate gas reservoirs; Drilling through or monitoring of formations containing gas hydrates or clathratesGroup E21B41/0099 is incomplete pending reclassification of documents from group E21B41/00.
Groups E21B41/00 and E21B41/0099 should be considered in order to perform a complete search. E21B41/02in situ inhibition of corrosion in boreholes or wells dump bailers E21B27/02; chemical compositions therefor C09K8/54; inhibiting corrosion in general C23F E21B41/04Manipulators for underwater operations, e.g. temporarily connected to well heads manipulators in general B25J E21B41/06Work chambers for underwater operations, e.g. temporarily connected to well heads in general B63C11/00 E21B41/08Underwater guide bases, e.g. drilling templatesLevelling thereof E21B41/10Guide posts, e.g. releasableAttaching guide lines to underwater guide bases E21B43/00Obtaining fluids from wells E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells applicable only to water E03B; obtaining oil-bearing deposits or soluble or meltable materials by mining techniques E21C41/00; pumps F04Group E21B43/00 is incomplete pending reclassification of documents from group E21B41/0092.
Groups E21B41/0092 and E21B43/00 should be considered in order to perform a complete search. E21B43/003Vibrating earth formations E21B43/006Production of coal-bed methane E21B43/243 takes precedence E21B43/01specially adapted for obtaining from underwater installations underwater well heads E21B33/035 E21B43/0107Connecting of flow lines to offshore structures E21B43/013 takes precedence E21B43/0122Collecting oil or the like from a submerged leakage cleaning or keeping clear the surface of open water from oil or the like E02B15/04 E21B43/013Connecting a production flow line to an underwater well head E21B43/0135using a pulling cable E21B43/017Production satellite stations, i.e. underwater installations comprising a plurality of satellite well heads connected to a central station underwater separating arrangements E21B43/36Group E21B43/017 is impacted by reclassification into group E21B43/0175.
Groups E21B43/017 and E21B43/0175 should be considered in order to perform a complete search. E21B43/0175Hydraulic schemes for production manifoldsGroup E21B43/0175 is incomplete pending reclassification of documents from group E21B43/017.
Groups E21B43/017 and E21B43/0175 should be considered in order to perform a complete search. E21B43/02Subsoil filtering E21B43/11 takes precedence; chemical compositions for consolidating loose sand or the like around wells C09K8/56 E21B43/025Consolidation of loose sand or the like round the wells without excessively decreasing the permeability thereof E21B43/04Gravelling of wells E21B43/045Crossover tools E21B43/08Screens or liners expandable screens or liners E21B43/108 E21B43/082Screens comprising porous materials, e.g. prepacked screens E21B43/084Screens comprising woven materials, e.g. mesh or cloth E21B43/086Screens with preformed openings, e.g. slotted liners comprising porous materials E21B43/082 E21B43/088Wire screens comprising porous materials E21B43/082; comprising woven materials E21B43/084 E21B43/10Setting of casings, screens, liners or the like in wells driving or forcing casings into boreholes, simultaneously drilling and casing boreholes E21B7/20; setting of tools, packers or the like E21B23/00; suspending casings in well heads E21B33/04 E21B43/101for underwater installations E21B43/103of expandable casings, screens, liners, or the like E21B43/105Expanding tools specially adapted therefor E21B43/106Couplings or joints therefor E21B43/108Expandable screens or perforated liners E21B43/11PerforatorsPermeators E21B43/112Perforators with extendable perforating members, e.g. actuated by fluid means E21B43/114Perforators using direct fluid action on the wall to be perforated, e.g. abrasive jets E21B43/116Gun or shaped-charge perforators E21B43/117Shaped-charge perforators E21B43/118 takes precedence E21B43/118characterised by lowering in vertical position and subsequent tilting to operating position E21B43/1185Ignition systems E21B43/11852hydraulically actuated E21B43/11855mechanically actuated, e.g. by movement of a wireline or a drop-bar E21B43/11852 takes precedence E21B43/11857firing indication systems E21B43/119Details, e.g. for locating perforating place or directionGroup E21B43/119 is impacted by reclassification into group E21B43/1193.
Groups E21B43/119 and E21B43/1193 should be considered in order to perform a complete search. E21B43/1193Dropping perforation guns after gun actuationGroup E21B43/1193 is incomplete pending reclassification of documents from group E21B43/119.
Groups E21B43/119 and E21B43/1193 should be considered in order to perform a complete search. E21B43/1195Replacement of drilling mud; decrease of undesirable shock waves E21B43/12Methods or apparatus for controlling the flow of the obtained fluid to or in wells E21B43/25 takes precedence; valve arrangements E21B34/00 E21B43/121Lifting well fluids monitoring of down-hole pump systems E21B47/008Group E21B43/121 is impacted by reclassification into group E21B43/13.
Groups E21B43/121 and E21B43/13 should be considered in order to perform a complete search. E21B43/122Gas liftGroup E21B43/122 is impacted by reclassification into group E21B43/13.
Groups E21B43/122 and E21B43/13 should be considered in order to perform a complete search. E21B43/123Gas lift valvesGroup E21B43/123 is impacted by reclassification into groups E21B43/1235 and E21B43/13.
Groups E21B43/123, E21B43/1235, and E21B43/13 should be considered in order to perform a complete search. E21B43/1235characterised by electromagnetic actuationGroup E21B43/1235 is incomplete pending reclassification of documents from group E21B43/123.
Groups E21B43/123 and E21B43/1235 should be considered in order to perform a complete search. E21B43/124Adaptation of jet-pump systemsGroup E21B43/124 is impacted by reclassification into group E21B43/13.
Groups E21B43/124 and E21B43/13 should be considered in order to perform a complete search. E21B43/126Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive powered by fluid E21B43/129Group E21B43/126 is impacted by reclassification into group E21B43/13.
Groups E21B43/126 and E21B43/13 should be considered in order to perform a complete search. E21B43/127Adaptations of walking-beam pump systemsGroup E21B43/127 is impacted by reclassification into group E21B43/13.
Groups E21B43/127 and E21B43/13 should be considered in order to perform a complete search. E21B43/128Adaptation of pump systems with down-hole electric drivesGroup E21B43/128 is impacted by reclassification into group E21B43/13.
Groups E21B43/128 and E21B43/13 should be considered in order to perform a complete search. E21B43/129Adaptations of down-hole pump systems powered by fluid supplied from outside the borehole gas-lift E21B43/122; jet pumps E21B43/124Group E21B43/129 is impacted by reclassification into group E21B43/13.
Groups E21B43/129 and E21B43/13 should be considered in order to perform a complete search. E21B43/13specially adapted to dewatering of wells of gas producing reservoirs, e.g. methane producing coal bedsGroup E21B43/13 is incomplete pending reclassification of documents from groups E21B43/121, E21B43/122, E21B43/123, E21B43/124, E21B43/126, E21B43/127, E21B43/128, and E21B43/129.
All groups listed in this Warning should be considered in order to perform a complete search. E21B43/14Obtaining from a multiple-zone well E21B43/16Enhanced recovery methods for obtaining hydrocarbons fracturing E21B43/26; obtaining slurry E21B43/29; reclamation of contaminated soil in situ B09C ; chemical compositions therefor C09K8/58Group E21B43/16 is incomplete pending reclassification of documents from group E21B41/0092.
Groups E21B41/0092 and E21B43/16 should be considered in order to perform a complete search. E21B43/162Injecting fluid from longitudinally spaced locations in injection well E21B43/164Injecting CO₂ or carbonated water in combination with organic material C09K8/594 E21B43/166Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium CO₂ injection E21B43/164; steam injection E21B43/24 E21B43/168Injecting a gaseous medium E21B43/17Interconnecting two or more wells by fracturing or otherwise attacking the formation E21B43/2405, E21B43/247 take precedence E21B43/18Repressuring or vacuum methods E21B43/20Displacing by water E21B43/24using heat, e.g. steam injection heating, cooling or insulating wells E21B36/00 ; in combination with organic material C09K8/592 E21B43/2401by means of electricity E21B43/2403by means of nuclear energy E21B43/2405in association with fracturing or crevice forming processes E21B43/247 takes precedence E21B43/2406Steam assisted gravity drainage [SAGD] E21B43/2408SAGD in combination with other methods E21B43/241combined with solution mining of non-hydrocarbon minerals, e.g. solvent pyrolysis of oil shale E21B43/243Combustion in situ E21B43/247in association with fracturing processes or crevice forming processes E21B43/248using explosives E21B43/25Methods for stimulating production dump bailers E21B27/02; vibration generating arrangements E21B28/00; by vibrating earth formations E21B43/003; chemical compositions therefor C09K8/60 E21B43/255including the injection of a gaseous medium as treatment fluid into the formation E21B43/26by forming crevices or fractures chemical compositions therefor C09K8/62Group E21B43/26 is impacted by reclassification into groups E21B43/2605, E21B43/2607, and E21B43/27.
All groups listed in this Warning should be considered in order to perform a complete search. E21B43/2605using gas or liquefied gasGroup E21B43/2605 is incomplete pending reclassification of documents from group E21B43/26.
Groups E21B43/26 and E21B43/2605 should be considered in order to perform a complete search. E21B43/2607Surface equipment specially adapted for fracturing operationsGroup E21B43/2607 is incomplete pending reclassification of documents from group E21B43/26.
Groups E21B43/26 and E21B43/2607 should be considered in order to perform a complete search. E21B43/261Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation E21B43/263using explosives combustion in situ using explosives E21B43/248 E21B43/2635by means of nuclear energy E21B43/267reinforcing fractures by propping chemical compositions therefor C09K8/80 E21B43/27by use of eroding chemicals, e.g. acidsGroup E21B43/27 is incomplete pending reclassification of documents from group E21B43/26.
Groups E21B43/26 and E21B43/27 should be considered in order to perform a complete search. E21B43/28Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent E21B43/241 takes precedence E21B43/281using heat E21B43/283in association with a fracturing process E21B43/285Melting minerals, e.g. sulfur E21B43/24 takes precedence; heating, cooling or insulating arrangements for wells E21B36/00 E21B43/29Obtaining a slurry of minerals, e.g. by using nozzles E21B43/292using steerable or laterally extendable nozzles E21B43/295Gasification of minerals, e.g. for producing mixtures of combustible gases E21B43/243 takes precedence E21B43/30Specific pattern of wells, e.g. optimizing the spacing of wells production satellite stations E21B43/017 E21B43/305comprising at least one inclined or horizontal well E21B43/32Preventing gas- or water-coning phenomena, i.e. the formation of a conical column of gas or water around wells E21B43/34Arrangements for separating materials produced by the well separating apparatus per se, see the relevant subclassesGroup E21B43/34 is impacted by reclassification into group E21B43/35.
Groups E21B43/34 and E21B43/35 should be considered in order to perform a complete search. E21B43/35specially adapted for separating solids down-hole drilling fluid separation systems E21B21/002; separating solids from drilling fluids E21B21/065Group E21B43/35 is incomplete pending reclassification of documents from groups E21B43/34, E21B43/36, E21B43/38, E21B43/385, and E21B43/40.
All groups listed in this Warning should be considered in order to perform a complete search. E21B43/36Underwater separating arrangements E21B43/38 takes precedenceGroup E21B43/36 is impacted by reclassification into group E21B43/35.
Groups E21B43/36 and E21B43/35 should be considered in order to perform a complete search. E21B43/38in the wellGroup E21B43/38 is impacted by reclassification into group E21B43/35.
Groups E21B43/38 and E21B43/35 should be considered in order to perform a complete search. E21B43/385by reinjecting the separated materials into an earth formation in the same wellGroup E21B43/385 is impacted by reclassification into group E21B43/35.
Groups E21B43/385 and E21B43/35 should be considered in order to perform a complete search. E21B43/40Separation associated with re-injection of separated materials E21B43/385 takes precedenceGroup E21B43/40 is impacted by reclassification into group E21B43/35.
Groups E21B43/40 and E21B43/35 should be considered in order to perform a complete search. E21B44/00Automatic control, surveying or testing E21B44/00Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems for non-automatic drilling control, see the operation controlled; automatic feeding from rack and connecting of drilling pipes E21B19/20; controlling pressure or flow of drilling fluid E21B21/08Systems specially adapted for monitoring a plurality of drilling variables or conditions means for transmitting measuring-signals from the well to the surface E21B47/12 E21B44/005Below-ground automatic control systems E21B44/02Automatic control of the tool feed E21B44/005, E21B44/10 take precedence E21B44/04in response to the torque of the drive ; Measuring drilling torque E21B44/06 takes precedence; measuring stresses in a well bore pipe E21B47/007 E21B44/06in response to the flow or pressure of the motive fluid of the drive E21B44/08in response to the amplitude of the movement of the percussion tool, e.g. jump or recoil E21B44/10Arrangements for automatic stopping when the tool is lifted from the working face E21B45/00Measuring the drilling time or rate of penetration E21B47/00Survey of boreholes or wells monitoring pressure or flow of drilling fluid E21B21/08Group E21B47/00 is impacted by reclassification into group E21B47/006.
Groups E21B47/00 and E21B47/006 should be considered in order to perform a complete search. E21B47/001for underwater installation E21B47/002by visual inspectionGroup E21B47/002 is impacted by reclassification into group E21B47/0025.
Groups E21B47/002 and E21B47/0025 should be considered in order to perform a complete search. E21B47/0025generating an image of the borehole wall using down-hole measurements, e.g. acoustic or electricGroup E21B47/0025 is incomplete pending reclassification of documents from group E21B47/002.
Groups E21B47/002 and E21B47/0025 should be considered in order to perform a complete search. E21B47/003Determining well or borehole volumes determining depth E21B47/04; diameter E21B47/08 E21B47/005Monitoring or checking of cementation quality or level E21B47/006Detection of corrosion or deposition of substancesGroup E21B47/006 is incomplete pending reclassification of documents from group E21B47/00.
Groups E21B47/00 and E21B47/006 should be considered in order to perform a complete search. E21B47/007Measuring stresses in a pipe string or casing for locating blocked portions of pipes E21B47/09 E21B47/008Monitoring of down-hole pump systems, e.g. for the detection of "pumped-off" conditions E21B47/009Monitoring of walking-beam pump systems E21B47/01Devices for supporting measuring instruments on drill bits, pipes, rods or wirelinesProtecting measuring instruments in boreholes against heat, shock, pressure or the likeDevices for both supporting and protecting measuring instruments are only classified in E21B47/017Group E21B47/01 is impacted by reclassification into group E21B47/013.
Groups E21B47/01 and E21B47/013 should be considered in order to perform a complete search. E21B47/013Devices specially adapted for supporting measuring instruments on drill bitsGroup E21B47/013 is incomplete pending reclassification of documents from groups E21B47/01 and E21B47/017.
Groups E21B47/01, E21B47/017, and E21B47/013 should be considered in order to perform a complete search. E21B47/017Protecting measuring instrumentsGroup E21B47/017 is impacted by reclassification into groups E21B47/013 and E21B47/0175.
Groups E21B47/017, E21B47/013, and E21B47/0175 should be considered in order to perform a complete search. E21B47/0175Cooling arrangementsGroup E21B47/0175 is incomplete pending reclassification of documents from group E21B47/017.
Groups E21B47/017 and E21B47/0175 should be considered in order to perform a complete search. E21B47/02Determining slope or direction E21B47/022of the borehole, e.g. using geomagnetism E21B47/0224using seismic or acoustic means E21B47/0228using electromagnetic energy or detectors therefor E21B47/0232at least one of the energy sources or one of the detectors being located on or above the ground surface E21B47/0236using a pendulum E21B47/024of devices in the borehole E21B47/022 takes precedence E21B47/026of penetrated ground layers E21B47/04Measuring depth or liquid level E21B47/047Liquid level E21B47/053 takes precedence E21B47/053using radioactive markers E21B47/06Measuring temperature or pressure E21B47/07Temperature E21B47/08Measuring diameters or related dimensions at the borehole E21B47/085using radiant means, e.g. acoustic, radioactive or electromagnetic E21B47/09Locating or determining the position of objects in boreholes or wells , e.g. the position of an extending armIdentifying the free or blocked portions of pipes E21B47/092by detecting magnetic anomalies E21B47/095by detecting an acoustic anomalies, e.g. using mud-pressure pulses E21B47/098using impression packers, e.g. to detect recesses or perforations E21B47/10Locating fluid leaks, intrusions or movements using impression packers E21B47/098Group E21B47/10 is impacted by reclassification into groups E21B47/113 and E21B47/114.
Groups E21B47/10, E21B47/113, and E21B47/114 should be considered in order to perform a complete search. E21B47/103using thermal measurements measurement temperature E21B47/07 E21B47/107using acoustic means E21B47/11using tracersusing radioactivityGroup E21B47/11 is impacted by reclassification into group E21B47/111.
Groups E21B47/11 and E21B47/111 should be considered in order to perform a complete search. E21B47/111using radioactivityGroup E21B47/111 is incomplete pending reclassification of documents from group E21B47/11.
Groups E21B47/11 and E21B47/111 should be considered in order to perform a complete search. E21B47/113using electrical indicationsusing light radiationsGroup E21B47/113 is incomplete pending reclassification of documents from group E21B47/10.
Group E21B47/113 is also impacted by reclassification into group E21B47/114.
Groups E21B47/10, E21B47/113, and E21B47/114 should be considered in order to perform a complete search. E21B47/114using light radiationGroup E21B47/114 is incomplete pending reclassification of documents from groups E21B47/10 and E21B47/113.
Groups E21B47/10, E21B47/113, and E21B47/114 should be considered in order to perform a complete search. E21B47/117Detecting leaks, e.g. from tubing, by pressure testing E21B47/12Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drillingGroup E21B47/12 is impacted by reclassification into group E21B47/138.
Groups E21B47/12 and E21B47/138 should be considered in order to perform a complete search. E21B47/125using earth as an electrical conductor E21B47/13 takes precedence E21B47/13by electromagnetic energy, e.g. radio frequency E21B47/135using light waves, e.g. infrared or ultraviolet waves E21B47/138Devices entrained in the flow of well-bore fluid for transmitting data, control or actuation signalsGroup E21B47/138 is incomplete pending reclassification of documents from group E21B47/12.
Groups E21B47/12 and E21B47/138 should be considered in order to perform a complete search. E21B47/14using acoustic waves E21B47/16through the drill string or casing , e.g. by torsional acoustic waves E21B47/18through the well fluid , e.g. mud pressure pulse telemetry E21B47/20by modulation of mud waves, e.g. by continuous modulation E21B47/22by negative mud pulses using a pressure relieve valve between drill pipe and annulus E21B47/24by positive mud pulses using a flow restricting valve within the drill pipe E21B47/26Storing data down-hole, e.g. in a memory or on a record carrier E21B49/00Testing the nature of borehole wallsFormation testingMethods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells sampling in general G01N1/00 E21B49/001specially adapted for underwater installations E21B49/003by analysing drilling variables or conditions E21B49/005 takes precedence; systems specially adapted for monitoring a plurality of drilling variables or conditions E21B44/00 E21B49/005Testing the nature of borehole walls or the formation by using drilling mud or cutting data E21B49/006Measuring wall stresses in the borehole E21B49/008by injection test; by analysing pressure variations in an injection or production test, e.g. for estimating the skin factor measuring pressure E21B47/06 E21B49/02by mechanically taking samples of the soil apparatus for obtaining undisturbed cores E21B25/00; investigation of foundation soil in situ E02D1/00 E21B49/025of underwater soil, e.g. with grab devices E21B49/04using explosives in boreholesusing projectiles penetrating the wall E21B49/06using side-wall drilling tools pressing or scrapers E21B49/08Obtaining fluid samples or testing fluids, in boreholes or wells E21B49/081with down-hole means for trapping a fluid sample E21B49/10 takes precedenceGroup E21B49/081 is impacted by reclassification into groups E21B49/0813 and E21B49/0815.
Groups E21B49/081, E21B49/0813, and E21B49/0815 should be considered in order to perform a complete search. E21B49/0813Sampling valve actuated by annulus pressure changesGroup E21B49/0813 is incomplete pending reclassification of documents from groups E21B49/081 and E21B49/083.
Groups E21B49/081, E21B49/083, and E21B49/0813 should be considered in order to perform a complete search. E21B49/0815Sampling valve actuated by tubing pressure changesGroup E21B49/0815 is incomplete pending reclassification of documents from groups E21B49/081 and E21B49/083.
Groups E21B49/081, E21B49/083, and E21B49/0815 should be considered in order to perform a complete search. E21B49/082Wire-line fluid samplers E21B49/083 takes precedence E21B49/083Samplers adapted to be lowered into or retrieved from a landing nipple, e.g. for testing a well without removing the drill stringGroup E21B49/083 is impacted by reclassification into groups E21B49/0813 and E21B49/0815.
Groups E21B49/083, E21B49/0813, and E21B49/0815 should be considered in order to perform a complete search. E21B49/084with means for conveying samples through pipe to surface E21B49/086Withdrawing samples at the surface E21B49/087Well testing, e.g. testing for reservoir productivity or formation parametersGroup E21B49/087 is impacted by reclassification into group E21B49/0875.
Groups E21B49/087 and E21B49/0875 should be considered in order to perform a complete search. E21B49/0875determining specific fluid parametersGroup E21B49/0875 is incomplete pending reclassification of documents from group E21B49/087.
Groups E21B49/087 and E21B49/0875 should be considered in order to perform a complete search. E21B49/088combined with sampling E21B49/10using side-wall fluid samplers or testers E21B2200/00Special features related to earth drilling for obtaining oil, gas or waterGroup E21B2200/00 is incomplete pending reclassification of documents from group E21B33/00.
Groups E21B33/00 and E21B2200/00 should be considered in order to perform a complete search. E21B2200/01Sealings characterised by their shapeGroup E21B2200/01 is incomplete pending reclassification of documents from group E21B33/00.
Groups E21B33/00 and E21B2200/01 should be considered in order to perform a complete search. E21B2200/02Down-hole chokes or valves for variably regulating fluid flowGroup E21B2200/02 is incomplete pending reclassification of documents from group E21B33/00.
Groups E21B33/00 and E21B2200/02 should be considered in order to perform a complete search. E21B2200/03Valves operated by gear mechanisms, e.g. rack and pinion mechanismsGroup E21B2200/03 is incomplete pending reclassification of documents from group E21B33/00.
Groups E21B33/00 and E21B2200/03 should be considered in order to perform a complete search. E21B2200/04Ball valvesGroup E21B2200/04 is incomplete pending reclassification of documents from group E21B33/00.
Groups E21B33/00 and E21B2200/04 should be considered in order to perform a complete search. E21B2200/05Flapper valvesGroup E21B2200/05 is incomplete pending reclassification of documents from group E21B33/00.
Groups E21B33/00 and E21B2200/05 should be considered in order to perform a complete search. E21B2200/06Sleeve valvesGroup E21B2200/06 is incomplete pending reclassification of documents from group E21B33/00.
Groups E21B33/00 and E21B2200/06 should be considered in order to perform a complete search. E21B2200/08Down-hole devices using materials which decompose under well-bore conditionsGroup E21B2200/08 is incomplete pending reclassification of documents from group E21B33/00.
Groups E21B33/00 and E21B2200/08 should be considered in order to perform a complete search. E21B2200/09Detecting, eliminating, preventing liquid slugs in production pipesGroup E21B2200/09 is incomplete pending reclassification of documents from group E21B33/00.
Groups E21B33/00 and E21B2200/09 should be considered in order to perform a complete search. E21B2200/20Computer models or simulations, e.g. for reservoirs under production, drill bitsGroup E21B2200/20 is incomplete pending reclassification of documents from group E21B33/00.
Groups E21B33/00 and E21B2200/20 should be considered in order to perform a complete search. E21B2200/22Fuzzy logic, artificial intelligence, neural networks or the likeGroup E21B2200/22 is incomplete pending reclassification of documents from group E21B33/00.
Groups E21B33/00 and E21B2200/22 should be considered in order to perform a complete search.