Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
More topics under "E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells" (324,830)
E21B 1 - Percussion drilling (2,080)
E21B 10 - Drill bits (19,464)
E21B 11 - Other drilling tools (454)
E21B 12 - Accessories for drilling tools (993)
E21B 15 - Supports for the drilling machine, e.g. derricks or masts (4,619)
E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800)
E21B 19 - Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables (17,198)
E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780)
E21B 23 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells (12,712)
E21B 25 - Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors (2,102)
E21B 27 - 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 (1,068)
E21B 28 - Vibration generating arrangements for boreholes or wells, e.g. for stimulating production (888)
E21B 29 - 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 (5,744)
E21B 3 - Rotary drilling (4,061)
E21B 31 - Fishing for or freeing objects in boreholes or wells (3,788)
E21B 33 - Sealing or packing boreholes or wells (33,564)
E21B 34 - Valve arrangements for boreholes or wells (14,685)
E21B 35 - Methods or apparatus for preventing or extinguishing fires (324)
E21B 36 - Heating, cooling, or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones (4,262)
E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129)
E21B 4 - Drives for drilling, used in the borehole (6,032)
E21B 40 - Tubing catchers, automatically arresting the fall of oil-well tubing (79)
E21B 41 - Equipment or details not covered by groups (7,984)
E21B 43 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (64,186)
E21B 44 - 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 (5,356)
E21B 45 - Measuring the drilling time or rate of penetration (257)
E21B 47 - Survey of boreholes or wells (31,352)
E21B 49 - 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 (11,875)
E21B 6 - Drives for drilling with combined rotary and percussive action (930)
E21B 7 - Special methods or apparatus for drilling (22,064)
Patents for E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (2,021)
03/1999
03/03/1999EP0899418A1 Modifying subterranean strata
03/03/1999EP0899416A1 Method of sealing conduits in lateral well bores
03/03/1999EP0899415A1 Method of sealing pipe string in well bores
02/1999
02/18/1999CA2245627A1 Methods of sealing pipe strings in well bores
02/18/1999CA2245215A1 Method of sealing conduits in lateral well bores
02/18/1999CA2245205A1 Methods of modifying subterranean strata properties
02/04/1999WO1999005385A2 Seal arrangement
12/1998
12/29/1998CA2053245C Well control apparatus
12/17/1998WO1998057031A1 System for drilling and completing multilateral wells
12/02/1998CN1200786A Method and equipment for treating well stream from offshore oil field
11/1998
11/04/1998EP0581838B1 Engine for performing subsea operations and use of it in a core sampler
11/03/1998CA2179594C Hydraulic jar
10/1998
10/27/1998US5826660 Method of operating a valve adapted to be disposed in a wellbore
09/1998
09/08/1998US5804714 Flow meter
08/1998
08/11/1998US5791423 Earth-boring bit having an improved hard-faced tooth structure
07/1998
07/29/1998CA2228343A1 Reverse circulation drill assembly
07/28/1998CA2090758C Variable depth grooved drill string member
07/15/1998EP0852656A1 Method and system for the treatment of a well stream from an offshore oil field
06/1998
06/25/1998CA2273996A1 System for controlling and stopping oil drilling fires
06/11/1998WO1998025005A1 Method and apparatus for increasing fluid recovery from a subterranean formation
05/1998
05/27/1998CN1182824A Method for consolidation of sand
05/07/1998WO1998018881A1 Enhanced multicomponent mixtures for soil decomposition
05/07/1998DE19643840A1 Verbesserte Mehrkomponentengemische für den Erdreichaufschluß Improved multi-component mixtures for geological exploration
05/07/1998CA2270716A1 Improved multicomponent mixtures for use in geological exploration
05/06/1998EP0839255A1 Safeguarded method and apparatus for fluid communication using coiled tubing, with application to drill stem testing
04/1998
04/14/1998US5738336 Oilfield valve
04/14/1998CA2055482C Arrangement in a pipe handling system
03/1998
03/18/1998EP0829616A1 Process for the consolidation of sand
01/1998
01/07/1998EP0815346A1 Flow meter
01/07/1998CN1169765A A drilling method and bit assembly to realise method
10/1997
10/15/1997EP0800609A1 A drilling method and bit assembly to realize the method
09/1997
09/09/1997CA2188098A1 Control of particulate flowback in subterranean wells
07/1997
07/17/1997WO1997025517A1 Flow meter
06/1997
06/17/1997US5638904 Within wells
05/1997
05/13/1997US5628493 Oilfield valve
04/1997
04/03/1997WO1997012118A1 Method and system for the treatment of a well stream from an offshore oil field
04/03/1997CA2232867A1 Treatment of a well stream from an offshore oil field
02/1997
02/13/1997WO1997005361A1 Safeguarded method and apparatus for fluid communication using coiled tubing, with application to drill stem testing
02/05/1997EP0397870B1 Method of casing the production seam in a well
01/1997
01/21/1997US5595244 Hydraulic jar
01/07/1997US5592381 Device for processing and interpreting drilling data, placed at the bottom of a well and method implementing this device
10/1996
10/22/1996CA1338675C Actuator and communication systems
09/1996
09/25/1996EP0327598B1 Fusion-drilling process
09/11/1996EP0638137B1 Method for excavating tunnels, utilisation of a foaming agent and new composition
08/1996
08/21/1996EP0544835B1 Variable depth grooved drill string member
06/1996
06/25/1996US5529285 Oilfield valve
06/20/1996WO1996018798A1 A drilling method and bit assembly to realize the method
06/12/1996EP0558703B1 Downhole drilling data processing and interpreting device and method for implementing same
08/1995
08/01/1995US5437527 Arrangement in a pipe handling system
05/1995
05/17/1995EP0515513B1 Releasable hydraulic and/or electric connection for subsea equipment
02/1995
02/22/1995EP0528013B1 Method of checking that an oil well safety valve is operating correctly
12/1994
12/14/1994EP0409880B1 Actuator and communication system
11/1994
11/22/1994US5365769 Method for verifying the correct operation of a safety valve of an oil well
10/1994
10/25/1994CA2010326C Wellhead repair unit
08/1994
08/10/1994EP0609964A2 Adjustable reactance device and method
08/10/1994EP0472583B1 Arrangement in a pipe handling system
07/1994
07/06/1994EP0470160B1 Well control apparatus
06/1994
06/15/1994EP0500609B1 Converter
05/1994
05/25/1994EP0548163B1 Self-shaping drill cutting edge
04/1994
04/12/1994US5301762 Rock drilling
04/12/1994CA1328478C Down-hole bearing assemblies
03/1994
03/22/1994US5295848 Releasable hydraulic and/or electric connection for subsea equipment
02/1994
02/09/1994EP0581838A1 Engine for performing subsea operations and devices driven by such an engine
12/1993
12/16/1993CA2098456A1 Method of uphole loading
11/1993
11/23/1993CA1324624C Elastomer seal structure
11/11/1993WO1993022538A1 Method for excavating tunnels, utilisation of a foaming agent and new composition
09/1993
09/22/1993EP0544835A4 Variable depth grooved drill string member
09/21/1993US5246203 Oilfield valve
09/21/1993US5246080 High pressure converter for deep well drilling
09/14/1993US5244329 Arrangement in a pipe handling system
07/1993
07/20/1993CA1320434C Method of casing off a producing formation in a well
06/1993
06/09/1993EP0544835A1 Variable depth grooved drill string member.
06/01/1993CA1318585C Blowout preventer testing apparatus
05/1993
05/18/1993CA1317874C Submerged actuator
04/1993
04/01/1993WO1993006339A1 Downhole drilling data processing and interpreting device and method for implementing same
03/1993
03/31/1993EP0465623A4 Method and apparatus for sealing pipe perforations
03/16/1993US5193619 For use in a well test pipe string
03/09/1993CA1314206C Annulus valve for concentric tubing hangers
02/1993
02/18/1993WO1993000500A3 Variable depth grooved drill string member
01/1993
01/26/1993US5181571 Well casing flotation device and method
12/1992
12/26/1992WO1993000500A2 Variable depth grooved drill string member
12/02/1992EP0515513A1 Releasable hydraulic and/or electric connection for subsea equipment.
10/1992
10/27/1992WO1992019836A1 Engine for performing subsea operations and devices driven by such an engine
10/27/1992CA2109107A1 Machine for subsea operations
09/1992
09/17/1992WO1992015768A1 Method of checking that an oil well safety valve is operating correctly
07/1992
07/26/1992WO1992013170A1 Shear ram apparatus
07/15/1992EP0494739A2 Directional drilling method
06/1992
06/10/1992EP0332622B1 Subsea systems and devices
05/1992
05/09/1992CA2055080A1 Rock bolting
04/1992
04/28/1992US5107936 Rock melting excavation process
03/1992
03/15/1992WO1992005335A1 Self-shaping drill cutting edge
03/15/1992CA2091676A1 Self-shaping drill cutting edge
02/1992
02/12/1992EP0470160A1 Well control apparatus.
02/12/1992EP0269653B1 Apparatus for correcting irregularities in or enlarging an underground duct
02/11/1992US5086850 Well bore drilling direction changing method
01/1992
01/15/1992EP0465623A1 Method and apparatus for sealing pipe perforations
12/1991
12/17/1991CA1293207C Apparatus for correcting irregularities in or enlarging an underground duct
12/11/1991EP0235268B1 Method and apparatus for reducing viscosity of high viscosity materials
11/1991
11/19/1991CA1292220C Earth boring bit with two piece bearing and rigid face seal assembly
10/1991
10/30/1991EP0233274B1 Riser tensioning system
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