| Patents for E21B 4 - Drives for drilling, used in the borehole (6,032) |
|---|
| 04/10/2008 | CA2664659A1 Percussion device and rock drilling machine |
| 04/09/2008 | EP1415064B1 Drilling apparatus |
| 04/09/2008 | CN100379936C Automatically controlled rotation-controllable drilling system |
| 04/08/2008 | US7353890 Down-the-hole hammer and components for a down-the-hole hammer, and a method of assembling a down-the-hole hammer |
| 04/08/2008 | US7353886 Tractor with improved valve system |
| 04/08/2008 | CA2444555C Apparatus and methods for drilling with casing |
| 04/03/2008 | WO2008015632A3 Technique and apparatus for drilling and completing a well in one half trip |
| 04/03/2008 | US20080078560 Motor seal |
| 04/03/2008 | US20080078559 Griper assembly for downhole tools |
| 03/26/2008 | EP1903178A2 Three dimensional steerable system |
| 03/26/2008 | CN201041002Y Impactor used matching with DTH drill |
| 03/26/2008 | CN201040999Y Splicing type falling-proof device |
| 03/25/2008 | US7347287 Hydraulic timing device |
| 03/25/2008 | CA2385426C Method and device for moving a tube in a borehole in the ground |
| 03/25/2008 | CA2240058C Coupling device for a drive assembly |
| 03/20/2008 | US20080066963 Hydraulically driven tractor |
| 03/19/2008 | EP1901417A1 Electric motor |
| 03/18/2008 | US7343982 Tractor with improved valve system |
| 03/12/2008 | EP1898044A2 Annulus pressure control drilling systems and methods |
| 03/11/2008 | CA2421707C Constant force actuator |
| 02/28/2008 | WO2008024925A1 Wellbore tractor with fluid conduit sheath |
| 02/28/2008 | WO2008024881A1 Downhole tool with closed loop power systems |
| 02/28/2008 | WO2008024856A1 Downhole tool with turbine-powered pump |
| 02/28/2008 | WO2008023089A1 Drilling device for drilling and reaming of a hole |
| 02/28/2008 | US20080047758 Device for Drilling a Bore in the Ground |
| 02/28/2008 | US20080047756 Hydrostatic mechanical seal with local pressurization of seal interface |
| 02/28/2008 | CA2697238A1 Drilling device for drilling and reaming of a hole |
| 02/27/2008 | EP1892416A1 Highly reinforced elastomer for use in downhole stators |
| 02/27/2008 | EP1891297A2 Novel activating mechanism for controlling the operation of a downhole tool |
| 02/27/2008 | CN101131067A Hydraulic oilway gyrator for drilling rigs and drilling tools |
| 02/27/2008 | CN100371541C Gear unit and method for controlling an internal pressure in the gear unit |
| 02/25/2008 | CA2715688A1 Passive vertical drilling motor stabilization |
| 02/25/2008 | CA2715603A1 Passive vertical drilling motor stabilization |
| 02/25/2008 | CA2598813A1 Highly reinforced elastomer for use in downhole stators |
| 02/21/2008 | US20080041631 Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 02/20/2008 | CN201024889Y Improved drive machine for light down-hole driller |
| 02/20/2008 | CN201024888Y Combined sealing device for gas enclosure base of down-hole driller |
| 02/20/2008 | CN101126303A Driller capable of diving in well |
| 02/14/2008 | US20080035352 Method for construction of low thermal expansion and low resistance wire for logging applications |
| 02/14/2008 | US20080035337 curable at room temperature; subterranean formation treatment fluid |
| 02/13/2008 | EP1885994A1 A device for selective movement of well tools and also a method of using same |
| 02/13/2008 | EP1885988A2 Exhaust valve and bit assembly for down-hole percussive drills |
| 02/13/2008 | EP1885987A2 Method and apparatus for shifting speeds in a fluid-actuated motor |
| 02/13/2008 | EP1579102B1 Bore hole tool assembly, bearing system for use in such a bore hole tool assembly, and method of designing such a bore hole tool assembly |
| 02/13/2008 | CN201021604Y Bearing node for turbine driller |
| 02/07/2008 | WO2008016308A1 Mechanical trigger arrangement |
| 02/07/2008 | WO2008015632A2 Technique and apparatus for drilling and completing a well in one half trip |
| 02/07/2008 | US20080029307 Rock Drilling Equipment |
| 02/07/2008 | US20080029304 Mandrel and bearing assembly for downhole drilling motor |
| 02/07/2008 | US20080029303 Technique and apparatus for drilling and completing a well in one half trip |
| 02/07/2008 | CA2658756A1 Technique and apparatus for drilling and completing a well in one half trip |
| 02/07/2008 | CA2657609A1 Mechanical trigger arrangement |
| 02/06/2008 | CN101120155A Integrated magnetic ranging tool |
| 02/06/2008 | CN100366862C Bore hole tool assembly, bearing system for use in such a bore hole tool assembly, and method of designing such a bore hole tool assembly |
| 01/30/2008 | EP1348063B1 Hydraulic jar device |
| 01/30/2008 | CN201013252Y Screw rod drilling plug pipe column communicator |
| 01/30/2008 | CN201013233Y Pneumatic hammer down-hole concentric tube drill |
| 01/30/2008 | CN201013232Y Drill-rod-free drilling tool |
| 01/29/2008 | US7322425 Method of generating stress pulse in tool by means of pressure fluid operated impact device, and impact device |
| 01/29/2008 | CA2334470C Method and system for moving equipment into and through a conduit |
| 01/22/2008 | US7321293 Integrated magnetic ranging tool |
| 01/22/2008 | CA2475671C Method of repair of collapsed or damaged tubulars downhole |
| 01/17/2008 | WO2008007066A1 Selective agitation of downhole apparatus |
| 01/17/2008 | CA2658162A1 Selective agitation of downhole apparatus |
| 01/16/2008 | CN201007184Y Screw drilling tool drive axle anti-falling device |
| 01/15/2008 | US7318489 Hydraulic motor arrangement and method of operating a hydraulic motor |
| 01/02/2008 | EP1725737B1 Drilling head with protective screen |
| 01/01/2008 | US7314100 System for use in a bore hole for axially coupling a tubular end and a mandrel |
| 12/25/2007 | US7311151 Substantially neutrally buoyant and positively buoyant electrically heated flowlines for production of subsea hydrocarbons |
| 12/25/2007 | US7311148 Methods and apparatus for wellbore construction and completion |
| 12/21/2007 | WO2007144157A1 Methods and apparatus for wireline drilling on coiled tubing |
| 12/21/2007 | WO2002103150A3 Tubing expansion |
| 12/21/2007 | CA2655245A1 Methods and apparatus for wireline drilling on coiled tubing |
| 12/19/2007 | EP1867831A1 Methods and apparatus for wireline drilling on coiled tubing |
| 12/19/2007 | CN200992986Y Pump pressure regulator |
| 12/18/2007 | CA2447565C Downhole motor locking assembly and method |
| 12/12/2007 | EP1454031B1 An improved transmission sleeve |
| 12/12/2007 | CN100354498C Air DTH hammer drilling equipment for core and follow-down drilling |
| 12/11/2007 | US7306059 Thrust bearing assembly |
| 12/11/2007 | CA2271525C Method of downhole drilling and apparatus therefor |
| 12/09/2007 | CA2549739A1 Fluid driven drilling motor and system |
| 12/06/2007 | WO2007137424A1 Impulse rotor generator |
| 12/06/2007 | US20070277988 Coupling device |
| 12/04/2007 | US7303022 Wired casing |
| 12/04/2007 | US7303007 Method and apparatus for transmitting sensor response data and power through a mud motor |
| 11/29/2007 | WO2007134748A1 Directional control drilling system |
| 11/29/2007 | WO2007134478A1 Mud shaft for the drill string of a rotary percussive drilling rig, impact stack for a mud shaft and rotary percussive drilling rig |
| 11/29/2007 | CA2650645A1 Directional control drilling system |
| 11/27/2007 | US7299886 Stabilized down hole drilling motor |
| 11/22/2007 | WO2006119008A3 Method and apparatus for shifting speeds in a fluid-actuated motor |
| 11/21/2007 | EP1857631A1 Directional control drilling system |
| 11/21/2007 | CN200978876Y Screw drill flexible axis |
| 11/21/2007 | CN200978620Y Screw drill motor rotor |
| 11/20/2007 | CA2371133C Method of creating a wellbore |
| 11/15/2007 | WO2007129115A1 Apparatus and method for selectively orienting a bit |
| 11/15/2007 | US20070261869 Water Hammer |
| 11/14/2007 | EP1579101B1 System for use in a bore hole for axially coupling a tubular end and a mandrel, and a connecting assembly for such a system |
| 11/14/2007 | EP1488071B1 Method and device for directional down-hole drilling |
| 11/13/2007 | US7293614 Multiple impact jar assembly and method |
| 11/08/2007 | WO2007125358A1 Seal assembly for use in a top drive |