|
E21B 1/00
|
Percussion drilling |
|
E21B 1/02
|
Surface drives for drop hammers, e.g. with a cable |
|
E21B 1/04
|
Devices for reversing the movement of the rod or cable at the surface |
|
E21B 1/12
|
Percussion drilling with a reciprocating impulse member |
|
E21B 1/14
|
Percussion drilling with a reciprocating impulse member driven by a rotating mechanism |
|
E21B 1/16
|
Percussion drilling with a reciprocating impulse member driven by a rotating mechanism with spring-mounted reciprocating masses, e.g. with air cushion |
|
E21B 1/18
|
Percussion drilling with a reciprocating impulse member driven by a rotating mechanism with spring-mounted reciprocating masses, e.g. with air cushion with elastic joining of the drive to the push-rod by double buffer springs |
|
E21B 1/20
|
Percussion drilling with a reciprocating impulse member driven by a rotating mechanism formed as centrifugal hammers |
|
E21B 1/22
|
Percussion drilling with a reciprocating impulse member driven by electromagnets |
|
E21B 1/24
|
Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure |
|
E21B 1/26
|
Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by liquid pressure |
|
E21B 1/28
|
Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by liquid pressure working with pulses |
|
E21B 1/30
|
Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure |
|
E21B 1/32
|
Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure working with pulses |
|
E21B 1/34
|
Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure working with pulses the impulse member being a piston of an internal-combustion engine |
|
E21B 1/36
|
Tool-carrier piston type, i.e. in which the tool is connected to an impulse member |
|
E21B 1/38
|
Hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member |
|
E21B 3/00
|
Rotary drilling |
|
E21B 3/02
|
Surface drives for rotary drilling |
|
E21B 3/03
|
Surface drives for rotary drilling with an intermittent unidirectional rotation of the tool |
|
E21B 3/04
|
Rotary tables |
|
E21B 3/06
|
Adaptation of rotary draw works to drive rotary tables |
|
E21B 3/025
|
Surface drives for rotary drilling with a to-and-fro rotation of the tool |
|
E21B 3/035
|
Surface drives for rotary drilling with slipping or elastic transmission |
|
E21B 4/00
|
Drives for drilling, used in the borehole |
|
E21B 4/02
|
Fluid rotary type drives |
|
E21B 4/04
|
Electric drives |
|
E21B 4/06
|
Down-hole impacting means, e.g. hammers |
|
E21B 4/08
|
Down-hole impacting means, e.g. hammers impact being obtained by gravity only, e.g. with lost-motion connection |
|
E21B 4/10
|
Down-hole impacting means, e.g. hammers continuous unidirectional rotary motion of shaft or drilling pipe effecting consecutive impacts |
|
E21B 4/12
|
Electrically operated hammers |
|
E21B 4/14
|
Fluid operated hammers |
|
E21B 4/16
|
Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units |
|
E21B 4/18
|
Anchoring or feeding in the borehole |
|
E21B 4/20
|
Drives for drilling, used in the borehole combined with surface drive |
|
E21B 6/00
|
Drives for drilling with combined rotary and percussive action |
|
E21B 6/02
|
Drives for drilling with combined rotary and percussive action the rotation being continuous |
|
E21B 6/04
|
Separate drives for percussion and rotation |
|
E21B 6/06
|
Drives for drilling with combined rotary and percussive action the rotation being intermittent, e.g. obtained by a ratchet device |
|
E21B 6/08
|
Separate drives for percussion and rotation |
|
E21B 7/00
|
Special methods or apparatus for drilling |
|
E21B 7/02
|
Drilling rigs characterised by means for land transport, e.g. skid mounting or wheel mounting |
|
E21B 7/04
|
Directional drilling |
|
E21B 7/06
|
Deflecting the direction of boreholes |
|
E21B 7/08
|
Special apparatus for deflecting the boring, e.g. special drill bits, knuckle joints, whipstocks |
|
E21B 7/10
|
Correction of deflected boreholes |
|
E21B 7/12
|
Underwater drilling |
|
E21B 7/14
|
Drilling by use of heat, e.g. flame drilling |
|
E21B 7/15
|
Drilling by use of heat, e.g. flame drilling of electrically generated heat |
|
E21B 7/16
|
Applying separate balls or pellets by the pressure of the drill, so-called shot-drilling |
|
E21B 7/18
|
Drilling by liquid or gas jets, with or without entrained pellets |
|
E21B 7/20
|
Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes |
|
E21B 7/24
|
Drilling using vibrating or oscillating means, e.g. out-of-balance masses |
|
E21B 7/26
|
Drilling without earth removal, e.g. with self-propelled burrowing devices |
|
E21B 7/28
|
Enlarging drilled holes, e.g. by counterboring |
|
E21B 7/30
|
Enlarging drilled holes, e.g. by counterboring without earth removal |
|
E21B 7/124
|
Underwater drilling with underwater tool drive prime mover, e.g. portable drilling rigs for use on underwater floors |
|
E21B 7/128
|
Underwater drilling from floating support with independent underwater anchored guide base |
|
E21B 7/132
|
Underwater drilling from underwater buoyant support |
|
E21B 7/136
|
Underwater drilling from non-buoyant support |
|
E21B 10/00
|
Drill bits |
|
E21B 10/02
|
Core bits |
|
E21B 10/04
|
Core bits with core destroying means |
|
E21B 10/06
|
Roller core bits |
|
E21B 10/08
|
Roller bits |
|
E21B 10/10
|
Roller bits with roller axle supported at both ends |
|
E21B 10/12
|
Roller bits with disc cutters |
|
E21B 10/14
|
Roller bits combined with non-rolling cutters other than of leading-portion type |
|
E21B 10/16
|
Roller bits characterised by tooth form or arrangement |
|
E21B 10/18
|
Roller bits characterised by conduits or nozzles for drilling fluids |
|
E21B 10/20
|
Roller bits characterised by detachable or adjustable parts, e.g. legs or axles |
|
E21B 10/22
|
Roller bits - characterised by bearing, lubrication or sealing details |
|
E21B 10/23
|
Roller bits - characterised by bearing, lubrication or sealing details with drilling fluid supply to the bearings |
|
E21B 10/24
|
Roller bits - characterised by bearing, lubrication or sealing details - characterised by lubricating details |
|
E21B 10/25
|
Roller bits - characterised by bearing, lubrication or sealing details - characterised by sealing details |
|
E21B 10/26
|
Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers |
|
E21B 10/28
|
Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with non-expansible roller cutters |
|
E21B 10/30
|
Longitudinal axis roller reamers, e.g. reamer stabilisers |
|
E21B 10/32
|
Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools |
|
E21B 10/34
|
Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools of roller-cutter type |
|
E21B 10/36
|
Percussion drill bits |
|
E21B 10/38
|
Percussion drill bits characterised by conduits or nozzles for drilling fluids |
|
E21B 10/40
|
Percussion drill bits with leading portion |
|
E21B 10/42
|
Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits |
|
E21B 10/43
|
Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements |
|
E21B 10/44
|
Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts |
|
E21B 10/46
|
Drill bits characterised by wear resisting parts, e.g. diamond inserts |
|
E21B 10/48
|
Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of core type |
|
E21B 10/50
|
Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type |
|
E21B 10/52
|
Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type with chisel- or button-type inserts |
|
E21B 10/54
|
Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits |
|
E21B 10/55
|
Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements |
|
E21B 10/56
|
Button-type inserts |
|
E21B 10/58
|
Chisel-type inserts |
|
E21B 10/60
|
Drill bits characterised by conduits or nozzles for drilling fluids |
|
E21B 10/61
|
Drill bits characterised by conduits or nozzles for drilling fluids characterised by nozzle structure |
|
E21B 10/62
|
Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable |
|
E21B 10/64
|
Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe |
|
E21B 10/66
|
Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe the cutting element being movable through the drilling pipe and laterally shiftable |
|
E21B 10/567
|
Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts |
|
E21B 10/573
|
Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts - characterised by support details, e.g. the substrate construction or the interface between the substrate and the cutting element |
|
E21B 10/627
|
Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable with plural detachable cutting elements |
|
E21B 10/633
|
Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable with plural detachable cutting elements independently detachable |
|
E21B 11/00
|
Other drilling tools |
|
E21B 11/02
|
Boring rams |
|
E21B 11/04
|
Boring grabs |
|
E21B 11/06
|
Other drilling tools with driven cutting chains or similarly-driven tools |
|
E21B 12/00
|
Accessories for drilling tools |
|
E21B 12/02
|
Wear indicators |
|
E21B 12/04
|
Drill bit protectors |
|
E21B 12/06
|
Mechanical cleaning devices |
|
E21B 15/00
|
Supports for the drilling machine, e.g. derricks or masts |
|
E21B 15/02
|
Supports for the drilling machine, e.g. derricks or masts specially adapted for underwater drilling |
|
E21B 15/04
|
Supports for the drilling machine, e.g. derricks or masts specially adapted for directional drilling, e.g. slant hole rigs |
|
E21B 17/00
|
Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings |
|
E21B 17/01
|
Risers |
|
E21B 17/02
|
Couplings; Joints |
|
E21B 17/03
|
Couplings; Joints between drilling rod or pipe and drill motor, e.g. between drilling rod and hammer |
|
E21B 17/04
|
Couplings; Joints between rod and bit, or between rod and rod |
|
E21B 17/05
|
Swivel joints |
|
E21B 17/06
|
Releasing-joints, e.g. safety joints |
|
E21B 17/07
|
Telescoping joints for varying drill string lengths; Shock absorbers |
|
E21B 17/08
|
Casing joints |
|
E21B 17/10
|
Wear protectors; Centralising devices |
|
E21B 17/12
|
Devices for placing or drawing out wear protectors |
|
E21B 17/14
|
Casing shoes |
|
E21B 17/16
|
Drill collars |
|
E21B 17/18
|
Pipes provided with plural fluid passages |
|
E21B 17/20
|
Flexible or articulated drilling pipes |
|
E21B 17/22
|
Rods or pipes with helical structure |
|
E21B 17/042
|
Couplings; Joints between rod and bit, or between rod and rod threaded |
|
E21B 17/043
|
Couplings; Joints between rod and bit, or between rod and rod threaded with locking means |
|
E21B 17/046
|
Couplings; Joints between rod and bit, or between rod and rod with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches |
|
E21B 19/00
|
Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables |
|
E21B 19/02
|
Rod or cable suspensions |
|
E21B 19/04
|
Hooks |
|
E21B 19/06
|
Elevators, i.e. rod- or tube-gripping devices |
|
E21B 19/07
|
Slip-type elevators |
|
E21B 19/08
|
Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods |
|
E21B 19/09
|
Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods specially adapted for drilling underwater formations from a floating support using heave compensators supporting the drill string |
|
E21B 19/10
|
Slips; Spiders |
|
E21B 19/12
|
Rope clamps |
|
E21B 19/14
|
Racks, ramps, troughs or bins, for holding the lengths of rod singly or connected; Handling between storage place and borehole |
|
E21B 19/15
|
Racking of rods in horizontal position; Handling between horizontal and vertical position |
|
E21B 19/16
|
Connecting or disconnecting pipe couplings or joints |
|
E21B 19/18
|
Connecting or disconnecting drill bit and drilling pipe |
|
E21B 19/20
|
Combined feeding from rack and connecting, e.g. automatically |
|
E21B 19/22
|
Handling reeled pipe or rod units, e.g. flexible drilling pipes |
|
E21B 19/24
|
Guiding or centralising devices for drilling rods or pipes |
|
E21B 19/081
|
Screw-and-nut feed mechanisms |
|
E21B 19/083
|
Cam, rack or like feed mechanisms |
|
E21B 19/084
|
Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with flexible drawing means, e.g. cables |
|
E21B 19/086
|
Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with a fluid-actuated cylinder |
|
E21B 19/087
|
Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods by means of a swinging arm |
|
E21B 19/089
|
Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with a spring or an additional weight |
|
E21B 21/00
|
Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor |
|
E21B 21/01
|
Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes |
|
E21B 21/02
|
Swivel joints in hose lines |
|
E21B 21/06
|
Arrangements for treating drilling fluids outside the borehole |
|
E21B 21/07
|
Arrangements for treating drilling fluids outside the borehole for treating dust-laden gaseous fluids |
|
E21B 21/08
|
Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure |
|
E21B 21/10
|
Valves arrangements in drilling-fluid circulation systems |
|
E21B 21/12
|
Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems |
|
E21B 21/14
|
Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using liquids and gases, e.g. foams |
|
E21B 21/015
|
Means engaging the bore entrance, e.g. hoods for collecting dust |
|
E21B 21/16
|
Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using gaseous fluids |
|
E21B 21/18
|
Preventing exhaust air from the drill motor from blowing-off towards the working face |
|
E21B 23/00
|
Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells |
|
E21B 23/01
|
Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like |
|
E21B 23/02
|
Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing |
|
E21B 23/03
|
Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for setting the tools into, or removing the tools from, laterally offset landing nipples or pockets |
|
E21B 23/04
|
Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion |
|
E21B 23/06
|
Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for setting packers |
|
E21B 23/08
|
Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems |
|
E21B 23/10
|
Tools specially adapted therefor |
|
E21B 23/12
|
Tool diverters |
|
E21B 23/14
|
Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for displacing a cable or a cable-operated tool, e.g. for logging or perforating operations in deviated wells |
|
E21B 25/00
|
Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors |
|
E21B 25/02
|
Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe |
|
E21B 25/04
|
Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe the core receiver having a core forming cutting edge or element, e.g. punch type core barrels |
|
E21B 25/06
|
Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors the core receiver having a flexible liner or inflatable retaining means |
|
E21B 25/08
|
Coating, freezing, consolidating cores; Recovering uncontaminated cores or cores at formation pressure |
|
E21B 25/10
|
Formed core retaining or severing means |
|
E21B 25/12
|
Formed core retaining or severing means of the sliding wedge type |
|
E21B 25/14
|
Formed core retaining or severing means mounted on pivot transverse to core axis |
|
E21B 25/16
|
Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors for obtaining oriented cores |
|
E21B 25/18
|
Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors the core receiver being specially adapted for operation under water |
|
E21B 27/00
|
Containers for collecting or depositing substances in boreholes or wells, e.g. bailers for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits |
|
E21B 27/02
|
Dump bailers, i.e. containers for depositing substances, e.g. cement or acids |
|
E21B 27/04
|
Containers for collecting or depositing substances in boreholes or wells, e.g. bailers for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits where the collecting or depositing means include helical conveying means |
|
E21B 28/00
|
Vibration generating arrangements for boreholes or wells, e.g. for stimulating production |
|
E21B 29/00
|
Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground |
|
E21B 29/02
|
Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground by explosives or by thermal or chemical means |
|
E21B 29/04
|
Cutting of wire lines or the like |
|
E21B 29/06
|
Cutting windows, e.g. directional window cutters for whipstock operations |
|
E21B 29/08
|
Cutting or deforming pipes to control fluid flow |
|
E21B 29/10
|
Reconditioning of well casings, e.g. straightening |
|
E21B 29/12
|
Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground specially adapted for underwater installations |
|
E21B 31/00
|
Fishing for or freeing objects in boreholes or wells |
|
E21B 31/03
|
Freeing by flushing |
|
E21B 31/06
|
Fishing for or freeing objects in boreholes or wells using magnetic means |
|
E21B 31/08
|
Fishing for or freeing objects in boreholes or wells using junk baskets or the like |
|
E21B 31/12
|
Grappling tools, e.g. tongs or grabs |
|
E21B 31/14
|
Grappling tools, e.g. tongs or grabs with means deflecting the direction of the tool, e.g. by use of knuckle joints |
|
E21B 31/16
|
Grappling tools, e.g. tongs or grabs combined with cutting or destroying means |
|
E21B 31/18
|
Grappling tools, e.g. tongs or grabs gripping externally, e.g. overshot |
|
E21B 31/20
|
Grappling tools, e.g. tongs or grabs gripping internally, e.g. fishing spears |
|
E21B 31/107
|
Fishing for or freeing objects in boreholes or wells using impact means for releasing stuck parts, e.g. jars |
|
E21B 31/113
|
Fishing for or freeing objects in boreholes or wells using impact means for releasing stuck parts, e.g. jars hydraulically operated |
|
E21B 33/00
|
Sealing or packing boreholes or wells |
|
E21B 33/02
|
Surface sealing or packing |
|
E21B 33/03
|
Well heads; Setting-up thereof |
|
E21B 33/04
|
Casing heads; Suspending casings or tubings in well heads |
|
E21B 33/05
|
Cementing-heads, e.g. having provision for introducing cementing plugs |
|
E21B 33/06
|
Blow-out preventers |
|
E21B 33/08
|
Wipers; Oil savers |
|
E21B 33/10
|
Sealing or packing boreholes or wells in the borehole |
|
E21B 33/12
|
Packers; Plugs |
|
E21B 33/13
|
Methods or devices for cementing, for plugging holes, crevices, or the like |
|
E21B 33/14
|
Methods or devices for cementing, for plugging holes, crevices, or the like for cementing casings into boreholes |
|
E21B 33/16
|
Methods or devices for cementing, for plugging holes, crevices, or the like for cementing casings into boreholes using plugs for isolating cement charge; Plugs therefor |
|
E21B 33/035
|
Well heads; Setting-up thereof specially adapted for underwater installations |
|
E21B 33/037
|
Protective housings therefor |
|
E21B 33/038
|
Connectors used on well heads, e.g. for connecting blow-out preventer and riser |
|
E21B 33/043
|
Casing heads; Suspending casings or tubings in well heads specially adapted for underwater well heads |
|
E21B 33/047
|
Casing heads; Suspending casings or tubings in well heads for plural tubing strings |
|
E21B 33/064
|
Blow-out preventers specially adapted for underwater well heads |
|
E21B 33/068
|
Well heads; Setting-up thereof having provision for introducing objects or fluids into, or removing objects from, wells |
|
E21B 33/072
|
Well heads; Setting-up thereof having provision for introducing objects or fluids into, or removing objects from, wells for cable-operated tools |
|
E21B 33/076
|
Well heads; Setting-up thereof having provision for introducing objects or fluids into, or removing objects from, wells specially adapted for underwater installations |
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E21B 33/122
|
Multiple-string packers |
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E21B 33/124
|
Units with longitudinally-spaced plugs for isolating the intermediate space |
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E21B 33/126
|
Packers; Plugs with fluid-pressure-operated elastic cup or skirt |
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E21B 33/127
|
Packers; Plugs with inflatable sleeve |
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E21B 33/128
|
Packers; Plugs with a member expanded radially by axial pressure |
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E21B 33/129
|
Packers; Plugs with mechanical slips for hooking into the casing |
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E21B 33/134
|
Bridging plugs |
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E21B 33/136
|
Baskets, e.g. of umbrella type |
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E21B 33/138
|
Plastering the borehole wall; Injecting into the formation |
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E21B 33/1295
|
Packers; Plugs with mechanical slips for hooking into the casing actuated by fluid pressure |
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E21B 34/00
|
Valve arrangements for boreholes or wells |
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E21B 34/02
|
Valve arrangements for boreholes or wells in well heads |
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E21B 34/04
|
Valve arrangements for boreholes or wells in well heads in underwater well heads |
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E21B 34/06
|
Valve arrangements for boreholes or wells in wells |
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E21B 34/08
|
Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained |
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E21B 34/10
|
Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole |
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E21B 34/12
|
Valve arrangements for boreholes or wells in wells operated by movement of casings or tubings |
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E21B 34/14
|
Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools |
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E21B 34/16
|
Control means therefor being outside the borehole |
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E21B 35/00
|
Methods or apparatus for preventing or extinguishing fires |
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E21B 36/00
|
Heating, cooling, or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones |
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E21B 36/02
|
Heating, cooling, or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using burners |
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E21B 36/04
|
Heating, cooling, or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters |
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E21B 37/00
|
Methods or apparatus for cleaning boreholes or wells |
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E21B 37/02
|
Scrapers specially adapted therefor |
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E21B 37/04
|
Scrapers specially adapted therefor operated by fluid pressure, e.g. free-piston scrapers |
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E21B 37/06
|
Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting the deposition of paraffins or like substances |
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E21B 37/08
|
Methods or apparatus for cleaning boreholes or wells cleaning in situ of down-hole filters, screens, or gravel packs |
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E21B 37/10
|
Well swabs |
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E21B 40/00
|
Tubing catchers, automatically arresting the fall of oil-well tubing |
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E21B 41/00
|
Equipment or details not covered by groups |
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E21B 41/02
|
Equipment or details not covered by groups in situ inhibition of corrosion in boreholes or wells |
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E21B 41/04
|
Manipulators for underwater operations, e.g. temporarily connected to well heads |
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E21B 41/06
|
Work chambers for underwater operations, e.g. temporarily connected to well heads |
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E21B 41/08
|
Underwater guide bases, e.g. drilling templates; Levelling thereof |
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E21B 41/10
|
Guide posts, e.g. releasable; Attaching guide lines to underwater guide bases |
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E21B 43/00
|
Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells |
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E21B 43/01
|
Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations |
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E21B 43/02
|
Subsoil filtering |
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E21B 43/04
|
Gravelling of wells |
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E21B 43/08
|
Screens or liners |
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E21B 43/10
|
Setting of casings, screens or liners in wells |
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E21B 43/11
|
Perforators; Permeators |
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E21B 43/12
|
Methods or apparatus for controlling the flow of the obtained fluid to or in wells |
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E21B 43/013
|
Connecting a production flow line to an underwater well head |
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E21B 43/14
|
Obtaining from a multiple-zone well |
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E21B 43/16
|
Enhanced recovery methods for obtaining hydrocarbons |
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E21B 43/17
|
Interconnecting two or more wells by fracturing or otherwise attacking the formation |
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E21B 43/18
|
Repressuring or vacuum methods |
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E21B 43/20
|
Displacing by water |
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E21B 43/22
|
Use of chemicals or bacterial activity |
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E21B 43/24
|
Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection |
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E21B 43/25
|
Methods for stimulating production |
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E21B 43/26
|
Methods for stimulating production by forming crevices or fractures |
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E21B 43/27
|
Methods for stimulating production by forming crevices or fractures by use of eroding chemicals, e.g. acids |
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E21B 43/28
|
Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent |
|
E21B 43/29
|
Obtaining a slurry of minerals, e.g. by using nozzles |
|
E21B 43/30
|
Specific pattern of wells, e.g. optimizing the spacing of wells |
|
E21B 43/32
|
Preventing gas- or water-coning phenomena, i.e. the formation of a conical column of gas or water around wells |
|
E21B 43/34
|
Arrangements for separating materials produced by the well |
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E21B 43/36
|
Underwater separating arrangements |
|
E21B 43/38
|
Arrangements for separating materials produced by the well in the well |
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E21B 43/40
|
Separation associated with re-injection of separated materials |
|
E21B 43/112
|
Perforators with extendable perforating members, e.g. actuated by fluid means |
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E21B 43/114
|
Perforators using direct fluid action, e.g. abrasive jets |
|
E21B 43/116
|
Gun or shaped-charge perforators |
|
E21B 43/117
|
Shaped-charge perforators |
|
E21B 43/118
|
Gun or shaped-charge perforators characterised by lowering in vertical position and subsequent tilting to operating position |
|
E21B 43/119
|
Perforators; Permeators - Details, e.g. for locating perforating place or direction |
|
E21B 43/241
|
Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection combined with solution mining of non-hydrocarbon minerals, e.g. solvent pyrolysis of oil shale |
|
E21B 43/243
|
Combustion in situ |
|
E21B 43/247
|
Combustion in situ in association with fracturing processes |
|
E21B 43/248
|
Combustion in situ in association with fracturing processes using explosives |
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E21B 43/263
|
Methods for stimulating production by forming crevices or fractures using explosives |
|
E21B 43/267
|
Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping |
|
E21B 43/285
|
Melting minerals, e.g. sulfur |
|
E21B 43/295
|
Gasification of minerals, e.g. for producing mixtures of combustible gases |
|
E21B 43/1185
|
Ignition systems |
|
E21B 44/00
|
Automatic 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; Systems specially adapted for monitoring a plurality of drilling variables or conditions |
|
E21B 44/02
|
Automatic control of the tool feed |
|
E21B 44/04
|
Automatic control of the tool feed in response to the torque of the drive |
|
E21B 44/06
|
Automatic control of the tool feed in response to the flow or pressure of the motive fluid of the drive |
|
E21B 44/08
|
Automatic control of the tool feed in response to the amplitude of the movement of the percussion tool, e.g. jump or recoil |
|
E21B 44/10
|
Arrangements for automatic stopping when the tool is lifted from the working face |
|
E21B 45/00
|
Measuring the drilling time or rate of penetration |
|
E21B 47/00
|
Survey of boreholes or wells |
|
E21B 47/01
|
Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like |
|
E21B 47/02
|
Determining slope or direction |
|
E21B 47/003
|
Determining well or borehole volumes |
|
E21B 47/04
|
Measuring depth or liquid level |
|
E21B 47/005
|
Monitoring or checking of cementation quality or level |
|
E21B 47/06
|
Measuring temperature or pressure |
|
E21B 47/07
|
Temperature |
|
E21B 47/08
|
Measuring diameters or related dimensions at the borehole |
|
E21B 47/09
|
Locating or determining the position of objects in boreholes or wells; Identifying the free or blocked portions of pipes |
|
E21B 47/10
|
Locating fluid leaks, intrusions or movements |
|
E21B 47/11
|
Locating fluid leaks, intrusions or movements using radioactivity |
|
E21B 47/12
|
Means 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 drilling |
|
E21B 47/13
|
Means 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 drilling by electromagnetic energy, e.g. of radio frequency range |
|
E21B 47/14
|
Means 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 drilling using acoustic waves |
|
E21B 47/16
|
Means 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 drilling using acoustic waves through the drill string or casing |
|
E21B 47/017
|
Protecting measuring instruments |
|
E21B 47/18
|
Means 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 drilling using acoustic waves through the well fluid |
|
E21B 47/20
|
Means 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 drilling using acoustic waves through the well fluid by modulation of mud waves, e.g. by continuous modulation |
|
E21B 47/22
|
Means 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 drilling using acoustic waves through the well fluid by negative mud pulses using a pressure relief valve between drill pipe and annulus |
|
E21B 47/24
|
Means 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 drilling using acoustic waves through the well fluid by positive mud pulses using a flow restricting valve within the drill pipe |
|
E21B 47/26
|
Storing data down-hole, e.g. in a memory or on a record carrier |
|
E21B 47/047
|
Liquid level |
|
E21B 47/053
|
Measuring depth or liquid level using radioactive markers |
|
E21B 47/085
|
Measuring diameters or related dimensions at the borehole using radiant means, e.g. acoustic, radioactive or electromagnetic |
|
E21B 47/092
|
Locating or determining the position of objects in boreholes or wells; Identifying the free or blocked portions of pipes by detecting magnetic anomalies |
|
E21B 47/095
|
Locating or determining the position of objects in boreholes or wells; Identifying the free or blocked portions of pipes by detecting acoustic anomalies, e.g. using mud-pressure pulses |
|
E21B 47/098
|
Locating or determining the position of objects in boreholes or wells; Identifying the free or blocked portions of pipes using impression packers, e.g. to detect recesses or perforations |
|
E21B 47/103
|
Locating fluid leaks, intrusions or movements using thermal measurements |
|
E21B 47/107
|
Locating fluid leaks, intrusions or movements using acoustic means |
|
E21B 47/113
|
Locating fluid leaks, intrusions or movements using light radiation |
|
E21B 47/117
|
Detecting leaks, e.g. from tubing, by pressure testing |
|
E21B 47/125
|
Means 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 drilling using earth as an electrical conductor |
|
E21B 47/135
|
Means 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 drilling by electromagnetic energy, e.g. of radio frequency range using light waves, e.g. infrared or ultraviolet waves |
|
E21B 47/0224
|
Determining slope or direction of the borehole, e.g. using geomagnetism using seismic or acoustic means |
|
E21B 47/0228
|
Determining slope or direction of the borehole, e.g. using geomagnetism using electromagnetic energy or detectors therefor |
|
E21B 47/0232
|
Determining slope or direction of the borehole, e.g. using geomagnetism using electromagnetic energy or detectors therefor at least one of the energy sources or one of the detectors being located on or above the ground surface |
|
E21B 47/0236
|
Determining slope or direction of the borehole, e.g. using geomagnetism using a pendulum |
|
E21B 49/00
|
Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells |
|
E21B 49/02
|
Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil |
|
E21B 49/04
|
Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil using projectiles penetrating the wall |
|
E21B 49/06
|
Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil using side-wall drilling tools or scrapers |
|
E21B 49/08
|
Obtaining fluid samples or testing fluids, in boreholes or wells |
|
E21B 49/10
|
Obtaining fluid samples or testing fluids, in boreholes or wells using side-wall fluid samplers or testers |
