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)
03/2012
03/20/2012	CA2562509C Telescopic feed beam for rock drill
03/20/2012	CA2526417C Method of delaying the setting time of crosslinked lost circulation control pills
03/06/2012	CA2519802C Tubing containment system
02/2012
02/28/2012	US8122958 Method and device for transferring signals within a well
02/22/2012	CN102359357A Method and device for expanding body under overpressure
02/07/2012	CA2484418C Well completion with merged influx of well fluids
01/2012
01/31/2012	CA2543909C High temperature electronic devices
01/31/2012	CA2492209C Tubular slip device and method
01/24/2012	US8100189 System and method for dynamic sealing of a drill string
01/24/2012	US8100174 Drill fluid collecting device and method of use
01/24/2012	CA2544832C System and method for damping vibration in a drill string
01/03/2012	US8087466 Centralization and running tool and method
01/03/2012	CA2707738C Riser rotating control device
01/03/2012	CA2531531C Method of generating stress pulse in tool by means of pressure fluid operated impact device, and impact device
01/03/2012	CA2476080C Mono-diameter wellbore casing
01/03/2012	CA2474998C Well system
12/2011
12/08/2011	US20110299936 Arctic Platform
12/06/2011	CA2702886C Apparatus and method for characterizing a reservoir
12/01/2011	US20110291334 System And Method For Damping Vibration In A Drill String
11/2011
11/29/2011	US8066086 Sleeve arrangement
11/29/2011	US8065937 Method and device for positioning a power tong at a pipe joint
11/23/2011	EP1825099B1 A method and a device for sealing a void incompletely filled with a cast material
11/22/2011	US8061449 Housing arrangement
11/16/2011	CN1664308B Wellbore drilling system and method
11/15/2011	CA2671282C Controlling transient pressure conditions in a wellbore
11/10/2011	WO2004092527A3 Apparatus for radially expanding and plastically deforming a tubular member
11/09/2011	EP1885994B1 A device for selective movement of well tools and also a method of using same
11/08/2011	US8052370 System for handling pipes between a pipe rack and a derrick, and also a device for assembling and disassembling pipe stands
11/01/2011	US8047286 Formation evaluation system and method
11/01/2011	CA2671374C Controlling transient pressure conditions in a wellbore
11/01/2011	CA2598587C Centralization and running tool and method
10/2011
10/18/2011	US8037937 Method and a device for solvent injection in a subsurface well
10/18/2011	CA2669480C Downhole formation testing tool
10/12/2011	CN102213772A Apparatus and system for well placement and reservoir characterization
10/05/2011	CN1922385B Method and actuator device
10/05/2011	CN101208157B Apparatus for sieving and fluid separation and a method of using same
10/05/2011	CN101035961B Sleeve arrangement
10/04/2011	US8029026 Threaded connections and methods for forming threaded connection
10/04/2011	CA2614809C System and method for dynamic sealing around a drill stem
09/2011
09/29/2011	US20110238220 Apparatus and system for well placement and reservoir characterization
09/14/2011	CN1721654B Downhole formation testing tool
09/06/2011	US8011446 Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell
08/2011
08/31/2011	EP2362022A2 Method of removing a platform support post
08/31/2011	CN101208494B Driller for rock and method for positioning drilling unit
08/30/2011	US8006771 Methods for expanding tubular strings and isolating subterranean zones
08/30/2011	CA2516542C Method for drilling and completing wells
08/17/2011	CN101076651B Method for casing drilling and drilling unit
08/16/2011	US7997357 System and method for damping vibration in a drill string
08/04/2011	US20110188944 Arctic Platform
08/02/2011	US7988384 Arctic platform
07/2011
07/28/2011	US20110180264 Method and device for filling a void incompletely filled by a cast material
07/27/2011	CN101040098B Housing arrangement
07/26/2011	US7984765 System and method for well intervention
07/19/2011	US7980300 Drillable bridge plug
07/05/2011	US7971640 Method and device for setting a bottom packer
06/2011
06/28/2011	CA2576053C Method and system for return of drilling fluid
06/14/2011	US7958948 Method and system for return of drilling fluid
06/14/2011	CA2630875C Drill fluid collecting device
06/07/2011	US7954567 Adjustable winged centering tool for use in pipes with varying diameter
05/2011
05/24/2011	US7946351 Method and device for sealing a void incompletely filled with a cast material
05/19/2011	US20110114390 Sleeve arrangement
05/17/2011	US7942481 Rock drill and method of breaking rock
05/10/2011	US7938175 Drilling, perforating and formation analysis
05/03/2011	CA2611771C Power tong device
04/2011
04/26/2011	US7931096 Adaptive user interface for rock drilling rig
04/26/2011	US7931077 Top drive drilling apparatus
04/21/2011	US20110088892 Packer-anchoring device
04/20/2011	CN101198763B Drill
04/12/2011	US7924013 Apparatus and system for well placement and reservoir characterization
04/12/2011	US7921925 Method and apparatus for expanding and separating tubulars in a wellbore
04/12/2011	CA2606771C Packer-anchoring device with expandable ring
03/2011
03/30/2011	CN101994487A Torsion bearing assembly for transferring torque to drill
03/30/2011	CN101076654B Arrangement and method for controlling drilling parameters
03/22/2011	CA2597887C System and method for well intervention
03/15/2011	CA2503760C Support system for power tong assembly
03/08/2011	US7900695 Well pump device
03/01/2011	US7896170 Flow divider and separation system
02/2011
02/22/2011	US7891437 Method for breaking rock
02/22/2011	US7891431 Annular packer device
02/22/2011	CA2517993C Method and apparatus for drilling with casing
02/22/2011	CA2491942C Method for upward growth of a hydraulic fracture along a well bore sandpacked annulus
02/09/2011	CN101970598A Treatment fluids comprising clarified xanthan and associated methods
02/09/2011	CN101048582B A drill rig and a method for controlling a fan thereof
02/01/2011	US7879227 Screen condition checking apparatus and method
02/01/2011	US7878271 Drill bit
01/2011
01/26/2011	CN101061290B Rock drill bit
01/25/2011	US7874354 Packer-anchoring device
01/25/2011	CA2498914C Expandable anchor
01/25/2011	CA2468433C A wellhead assembly for communicating with the casing hanger annulus
01/25/2011	CA2432442C Hydrophilic polymer concentrates
01/04/2011	US7861804 Sleeve arrangement
01/04/2011	US7861779 Method and device for establishing an underground well
01/04/2011	CA2467377C Collapsible expansion cone
12/2010
12/30/2010	US20100329795 Arctic platform
12/28/2010	US7857065 Device for selective movement of well tools and also a method of using same
12/23/2010	US20100321022 Apparatus and system for well placement and reservoir characterization
12/23/2010	US20100319935 Method and device for a running tool
12/22/2010	CN1789656B Marking system and method
12/21/2010	CA2459537C System for lining a wellbore casing
12/16/2010	US20100314107 Method and device for transferring signals within a well

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