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)
11/2009
11/10/2009	CA2512292C Unitary blade seal for a shearing blind ram in a ram type blowout preventer
11/05/2009	US20090272547 Method and apparatus for a downhole excavation in a wellbore
11/03/2009	US7612565 Apparatus and system for well placement and reservoir characterization
11/03/2009	US7610963 Method and device for fluid displacement
10/2009
10/29/2009	US20090266617 Sleeve arrangement
10/27/2009	CA2528817C Apparatus and method for formation evaluation
10/27/2009	CA2528393C Marking system and method
10/27/2009	CA2517543C Apparatus and method for formation evaluation
10/20/2009	US7604070 Arrangement for controlling percussive rock drilling
10/20/2009	CA2567842C A method and a device for expanding a body under overpressure
10/20/2009	CA2522918C Apparatus and method for cutting a tubular
10/13/2009	US7600928 System and method for performing and protecting hybrid line splices
10/13/2009	CA2532990C Continuous monobore liquid lining system
10/13/2009	CA2524681C Electrical transmission apparatus through rotating tubular members
10/13/2009	CA2509604C Downhole formation testing tool
10/08/2009	US20090250263 Adaptive user interface for rock drilling rig
10/01/2009	US20090242273 Drill rig and method for controlling a fan therein
09/2009
09/30/2009	CN100544895C Impact device and method for generating stress pulse therein
09/24/2009	US20090236100 Plug retrieval and debris removal tool
09/22/2009	CA2524749C System and method for placement of a packer in an open hole wellbore
09/22/2009	CA2485973C Equalizer valve
09/15/2009	CA2535352C Using fluids at elevated temperatures to increase fracture gradients
09/10/2009	US20090223680 Methods for expanding tubular strings and isolating subterranean zones
09/10/2009	US20090223669 Method and a device for solvent injection in a subsurface well
09/10/2009	US20090223666 Top drive swivel apparatus and method
09/09/2009	EP1558831B1 Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications
09/08/2009	US7585179 Cable connection
09/08/2009	US7584786 Apparatus and method for formation evaluation
09/01/2009	CA2519508C A motor pulse controller
08/2009
08/27/2009	US20090211239 Pressure accumulator to establish sufficient power to handle and operate external equipment and use thereof
08/26/2009	EP1606487B1 Pneumatic perforator with independent rotation of the drill
08/18/2009	US7575050 Method and apparatus for a downhole excavation in a wellbore
08/18/2009	CA2571658C Method for controlling percussion device, software product, and percussion device
08/11/2009	US7571777 Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell
08/04/2009	US7568861 Bend stiffener
08/04/2009	CA2509317C Method and apparatus for expanding and separating tubulars in a wellbore
08/04/2009	CA2466771C Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell
07/2009
07/30/2009	US20090188686 Method for controlling percussion device, software production, and percussion device
07/28/2009	US7566686 Providing a water-based drilling fluid comprising an effective amount of a choline salt, foamer, and water; circulating the drilling fluid through the wellbore hole during drilling, and injecting a gas into wellbore hole to reduce hydrostatic pressure of the drilling fluid
07/21/2009	US7562710 Method and a device for in situ formation of a seal in an annulus in a well
07/21/2009	CA2507583C Casing running head
07/14/2009	US7560690 System for delivery of a tracer in fluid transport systems and use thereof
07/14/2009	US7559370 Restricting fluid passage and novel materials therefor
07/14/2009	US7559365 Collapsible expansion cone
07/09/2009	US20090175415 Method of visualizing target objects in a fluid-carrying pipe
07/08/2009	CN100509301C Method for controlling percussion device, software product, and percussion device
07/07/2009	US7556154 Drill fluid screening device
07/07/2009	US7556093 Downhole fiber optic wet connect and gravel pack completion
07/02/2009	US20090166090 Top Drive Drilling Apparatus
07/02/2009	US20090166046 System and Method for Dynamic Sealing Of a Drill String
07/01/2009	CN100507929C Improvements in drilling apparatus
06/2009
06/25/2009	US20090159528 Flow Divider and Separation System
06/25/2009	US20090159265 Packer-anchoring device
06/23/2009	CA2523862C Apparatus for radially expanding and plastically deforming a tubular member
06/18/2009	WO2009076183A2 Apparatus and system for well placement and reservoir characterization
06/18/2009	CA2707040A1 Apparatus and system for well placement and reservoir characterization
06/09/2009	US7543637 Methods for expanding tubular strings and isolating subterranean zones
06/09/2009	CA2519647C Method of treating subterranean formations to enhance hydrocarbon production using proppants
05/2009
05/28/2009	WO2004094768A3 Drill string design methodology for mitigating fatigue failure
05/28/2009	US20090133871 Drilling, perforating and formation analysis
05/21/2009	US20090126927 Method and Equipment for the Reduction of Multiple Dispersions
05/19/2009	US7533722 Surge chamber assembly and method for perforating in dynamic underbalanced conditions
05/12/2009	US7532129 Apparatus and methods for conveying and operating analytical instrumentation within a well borehole
05/06/2009	EP1875037B1 Valve
04/2009
04/23/2009	US20090101359 High Pressure Wireline Top-Entry Packoff Apparatus and Method
04/23/2009	US20090101339 Formation evaluation system and method
04/23/2009	US20090101332 Method and apparatus for drilling with casing
04/16/2009	WO2005050257A3 High temperature imaging device
04/14/2009	US7516790 Mono-diameter wellbore casing
04/07/2009	US7513313 Bottom plug for forming a mono diameter wellbore casing
04/07/2009	US7513304 Method for drilling with improved fluid collection pattern
04/02/2009	WO2005040545A3 Tree mounted well flow interface device
04/02/2009	US20090084537 Top Drive Drilling Apparatus
03/2009
03/26/2009	US20090080982 Bend Stiffener
03/26/2009	US20090078438 Arrangement for Positioning Drilling Unit
03/25/2009	EP1576253A4 Method using particulate chelates to stimulate production of petroleum in carbonate formations
03/17/2009	US7503391 Tieback connector
03/17/2009	US7503386 Slip on screen with expanded base pipe
03/12/2009	US20090065256 Method and Rock Drilling Rig for Hole Drilling
03/12/2009	US20090065219 Method and a device for setting a casing
03/11/2009	EP1937930B1 Separating device
03/11/2009	EP1791681B1 Method for breaking rock
03/10/2009	US7500518 Top drive swivel apparatus and method
02/2009
02/26/2009	US20090053015 Pipe Handling Equipment
02/24/2009	US7493950 Device for a long well tool
02/19/2009	WO2009022106A1 Treatment fluids comprising clarified xanthan and associated methods
02/19/2009	US20090044976 Arrangement and method for controlling drilling parameters
02/19/2009	CA2694151A1 Treatment fluids comprising clarified xanthan and associated methods
02/17/2009	US7490664 Drilling, perforating and formation analysis
02/12/2009	US20090038847 User interface for rock drilling rig
02/12/2009	US20090038138 Protective compression and tension sleeves for threaded connections for radially expandable tubular members
02/11/2009	CN101365861A Drill fluid collecting device
02/11/2009	CN101365859A Method and device for positioning a power tong at a pipe joint
02/10/2009	US7487837 Riser rotating control device
02/10/2009	US7487835 Method of developing a re-entry into a parent wellbore from a lateral wellbore, and bottom hole assembly for milling
02/03/2009	US7484563 Formation evaluation system and method
02/03/2009	CA2557830C A method and a device for sealing a void incompletely filled with a cast material
02/03/2009	CA2528722C Flow control apparatus for use in a wellbore
01/2009
01/29/2009	US20090025947 Method, arrangement and valve for controlling rock drilling
01/27/2009	CA2509928C Apparatus and method to detect actuation of a flow control device

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