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)
07/2003
07/17/2003	WO2003058022A2 Seal receptacle using expandable liner hanger
07/17/2003	CA2471875A1 Seal receptacle using expandable liner hanger
07/16/2003	EP1327054A1 Method for determining pressure profiles in wellbores, flowlines and pipelines, and use of such method
07/09/2003	EP1326001A1 Feed beam for a portable machine tool
06/2003
06/26/2003	US20030120427 Graphical method for designing the trajectory of a well bore
06/19/2003	WO2003050376A2 Burst qam downhole telemetry system
06/19/2003	US20030111229 Wellhead assembly for communicating with the casing hanger annulus
06/19/2003	CA2469168A1 Burst qam downhole telemetry system
06/05/2003	WO2003046329A2 A wellhead assembly for communicating with the casing hanger annulus
06/03/2003	US6573716 Method and apparatus for tuning an NMR coil
05/2003
05/29/2003	US20030098152 Method and apparatus involving an integrated or otherwise combined exit guide and section mill for sidetracking or directional drilling from existing wellbores
05/27/2003	US6568469 Method and apparatus for connecting a main well bore and a lateral branch
05/22/2003	WO2003042489A2 Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell
05/22/2003	WO2003042488A2 Deepwater slim hole well construction
05/22/2003	WO2003042487A2 Mono diameter wellbore casing
05/22/2003	WO2003042486A2 Collapsible expansion cone
05/22/2003	WO2003042485A2 Apparatus for extraction of oil via underground drilling and production location
05/22/2003	CA2467381A1 Mono diameter wellbore casing
05/15/2003	US20030089506 Apparatus for extraction of oil via underground drilling and production location
05/02/2003	EP1305502A1 Vibration based power generator
05/01/2003	US20030079887 High pressure sealing apparatus and method
04/2003
04/24/2003	US20030075361 Well system
04/24/2003	US20030075319 Auto-extending/retracting electrically isolated conductors in a segmented drill string
04/17/2003	US20030070840 Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications
03/2003
03/20/2003	WO2003023179A2 System for lining a wellbore casing
03/18/2003	US6534980 Downhole NMR tool antenna design
02/2003
02/12/2003	EP1282760A1 A method of conducting in situ measurements of properties of a reservoir fluid
01/2003
01/02/2003	US20030004648 Method and process for prediction of subsurface fluid and rock pressures in the earth
12/2002
12/27/2002	WO2002103157A1 Process for the recovery of oil from a natural oil reservoir
12/24/2002	US6497290 Method and apparatus using coiled-in-coiled tubing
11/2002
11/14/2002	US20020166702 Mounting attachment and bearing system for an industrial earth-boring cutter
11/12/2002	US6478088 Method for the formation of a plug in a petroleum well
10/2002
10/17/2002	US20020148616 Apparatus and method for remote adjustment of drill string centering to prevent damage to wellhead
10/09/2002	CN1373282A Combined drilling tool for drilling straight hole and boring
10/09/2002	CN1092276C Apparatus of valve for stopping oil and gas drilling rod
09/2002
09/17/2002	US6450270 Rotary cone bit for cutting removal
08/2002
08/22/2002	US20020113718 Burst QAM downhole telemetry system
08/21/2002	EP1233143A1 Coiled tubing
08/20/2002	CA2372287A1 Method and apparatus for connecting a main well bore and a lateral branch
06/2002
06/13/2002	US20020070337 Scale monitor
06/04/2002	US6400147 Downhole NMR tool having a programmable pulse sequencer
05/2002
05/28/2002	US6394186 Apparatus for remote adjustment of drill string centering to prevent damage to wellhead
05/09/2002	US20020053426 Method and apparatus for increasing fluid recovery from a subterranean formation
04/2002
04/04/2002	US20020038849 Method and apparatus for safely operating radiation generators in while-drilling and while-tripping applications
03/2002
03/28/2002	WO2002025062A1 Method for determining pressure profiles in wellbores, flowlines and pipelines, and use of such method
03/28/2002	US20020036503 Method and apparatus for tuning an NMR coil
03/28/2002	US20020035895 Hardfaced drill bit structures and method for making such structures
03/27/2002	CN1081719C Method for consolidation of sand
03/21/2002	US20020033699 Downhole NMR tool
03/19/2002	CA2214786C Flow meter
12/2001
12/12/2001	EP0948577B1 Use of enhanced multicomponent mixtures for soil decomposition
12/04/2001	US6325152 Method and apparatus for increasing fluid recovery from a subterranean formation
12/04/2001	CA2043695C Drilling tool for sinking wells in underground rock formations
11/2001
11/22/2001	US20010042625 Apparatus for facilitating the connection of tubulars using a top drive
11/07/2001	EP1152119A2 An apparatus for running tubulars into a borehole
10/2001
10/04/2001	US20010025710 Method and apparatus for connecting a main well bore and a lateral branch
09/2001
09/18/2001	US6289985 System intended for permanent installation of measuring sondes against the inner wall of a pipe
08/2001
08/16/2001	EP1123907A2 Cementing casing strings in deep wells
08/14/2001	US6273191 Preparing a cement of hydraulic cement, water reducing, dispersing, compressive strength enhancing, set retarding and set accelerating additives and water; placing in an anulus between the casing string and well bore and allowing to set
08/09/2001	CA2334521A1 Cementing casing strings in deep water offshore wells
07/2001
07/24/2001	CA2221069C Method for horizontal directional drilling of rock formations
07/24/2001	CA2221068C Drill bit for horizontal directional drilling of rock formations
07/11/2001	CN1303463A Encapsulated breaker slurry compositions and methods of use
07/10/2001	CA2096941C Downhole drilling data processing and interpreting device, and method for implementing same
06/2001
06/12/2001	US6244364 Earth-boring bit having cobalt/tungsten carbide inserts
06/05/2001	US6241023 Unlocking packer setting method and device
05/2001
05/29/2001	US6237691 Method and apparatus for increasing fluid recovery from a subterranean formation
04/2001
04/03/2001	US6209660 Drill bit shear relief for horizontal directional drilling of rock formations
03/2001
03/24/2001	CA2320396A1 Improved rotary cone bit for cutting removal
03/06/2001	US6196338 Hardfacing rock bit cones for erosion protection
02/2001
02/28/2001	CN1062635C Drilling method and bit assembly to realise method
02/21/2001	EP1076758A2 A method for the formation of a plug in a petroleum well
01/2001
01/17/2001	CN1060839C Method and equipment for treating well stream from off shore oil field
12/2000
12/03/2000	CA2294409A1 Core orientation
10/2000
10/18/2000	CN2401695Y Inverted vertical hole inclinometer
10/11/2000	EP1042587A4 System for drilling and completing multilateral wells
10/11/2000	EP1042587A1 System for drilling and completing multilateral wells
07/2000
07/19/2000	EP1020507A2 Enhanced multicomponent mixtures for soil decomposition
07/19/2000	CN1260497A Underground nulcear magnetic resonance logger with programmable pulse serial generators
07/18/2000	US6089322 Method and apparatus for increasing fluid recovery from a subterranean formation
07/05/2000	EP1015729A1 Connection of tubulars using a top drive
06/2000
06/18/2000	CA2292816A1 System for the permanent installation of sensors against the inner surface of a duct
04/2000
04/11/2000	US6047774 System for drilling and completing multilateral wells
04/06/2000	WO1999057409A3 A method and a plug for plugging a casing in a petroleum well and a tool for milling an opening in a casing in a petroleum well
02/2000
02/03/2000	WO2000005486A1 Automatic depth sensing detection for portable soil moisture probes
02/03/2000	WO2000005483A1 Connection of tubulars using a top drive
01/2000
01/05/2000	EP0839255A4 Safeguarded method and apparatus for fluid communication using coiled tubing, with application to drill stem testing
01/05/2000	CN1240493A System for controlling and stopping oil drilling fires
12/1999
12/09/1999	CA2332044A1 Encapsulated breaker slurry compositions and methods of use
11/1999
11/23/1999	US5990315 Reacting 2-(5-amino-2,4-dichlorophenyl)-4-(difluoromethyl)-2,4-dihydro-5-methyl-3h-in the presence of a catalytic amount of a source of soluble halide.
11/17/1999	CN1235628A Enhanced multicomponent mixtures for soil decomposition
11/11/1999	WO1999057409A2 A method and a plug for plugging a casing in a petroleum well and a tool for milling an opening in a casing in a petroleum well
10/1999
10/13/1999	EP0948577A1 Enhanced multicomponent mixtures for soil decomposition
09/1999
09/28/1999	US5957224 Double bit assembly and method of using the same
08/1999
08/17/1999	US5937949 Process for the consolidation of sand
08/10/1999	US5934391 Sonde housing door hold-down system
08/03/1999	US5931240 Drill bit concave steering channel for horizontal directional drilling
07/1999
07/21/1999	CN1223323A Excavator
04/1999
04/08/1999	WO1999005385A3 Seal arrangement
04/06/1999	CA1340489C Actuator and communication systems

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