| Patents for E21B 31 - Fishing for or freeing objects in boreholes or wells (3,788) |
|---|
| 12/23/2010 | CA2763137A1 Overshot device |
| 12/22/2010 | EP2264277A1 Overshot device |
| 12/22/2010 | CN201679471U Fishing tool for tripping oil well test instruments |
| 12/21/2010 | US7854258 Self-anchoring device with force amplification |
| 12/16/2010 | WO2010144583A2 Contaminant excluding junction and method |
| 12/15/2010 | CN201671582U Sandstone type uranium ore well logging gripper tube midway salvaging device |
| 12/14/2010 | CA2634287C Apparatus and method for unsticking a downhole tool |
| 12/09/2010 | WO2010140896A1 Fishing tool |
| 12/09/2010 | US20100307739 Double-Acting Jar |
| 12/03/2010 | CA2668462A1 Double-acting jar |
| 12/01/2010 | CN201661261U Well casing positioning and reversing tool |
| 12/01/2010 | CN201661260U Spiral-seam type female coupling tap |
| 12/01/2010 | CN101899959A Fishing oil tube overflow controller |
| 12/01/2010 | CN101899956A Method for salvaging electric pump pipe column fish |
| 11/25/2010 | WO2010135245A2 Intelligent debris removal tool |
| 11/24/2010 | CN201650195U Retrievable hydraulic packer setting ball-play assembly |
| 11/24/2010 | CN201650182U Cone overshot for horizontally directional drilling |
| 11/24/2010 | CN201650174U Forward rotating and backward reversing tool locking device |
| 11/24/2010 | CN1587636B Full well back circulation fishing process |
| 11/24/2010 | CN101892823A Method for throwing and fishing out underground restrictor from gas well without utilizing steel wires |
| 11/24/2010 | CN101892815A Hydromechanical drilling jar |
| 11/18/2010 | US20100288492 Intelligent Debris Removal Tool |
| 11/18/2010 | US20100288485 Packer retrieving mill with debris removal |
| 11/17/2010 | CN201635689U Repeated fishing-type rope coring fishing device |
| 11/17/2010 | CN201635688U Wall junks fishing tool at oil field |
| 11/17/2010 | CN201635687U Down hole special-shaped falling object fishing tool |
| 11/10/2010 | CN201627557U Fishing tool of wireless drilling inclinometer |
| 11/10/2010 | CN201627556U Fishing head capable of cutting |
| 11/10/2010 | CN201627555U Novel down-hole fisher for oilfields |
| 11/09/2010 | US7828079 Sonic wireline dry slough barrel |
| 11/09/2010 | US7828062 Downhole tool |
| 11/09/2010 | US7828052 Downhole force generator |
| 11/03/2010 | CN201620796U Fisher for downhole chocks |
| 11/03/2010 | CN201620795U Novel oil-field fishing tap device |
| 11/03/2010 | CN201620794U Underwater well mouth head recovery tool |
| 11/03/2010 | CN201620793U Guide shoe for pulse generator of wireless drilling gradient meter |
| 11/03/2010 | CN201620788U Kelly bushing for drill stems |
| 11/02/2010 | CA2469166C Method of freeing stuck drill pipe |
| 10/28/2010 | US20100270018 Fishing tool |
| 10/27/2010 | EP2243924A1 Methods and Associated Apparatus for Downhole Data Retrieval, Monitoring and Tool Actuation |
| 10/27/2010 | CN101871331A Steel wire deliver packer, deliver salvaging tool and working method |
| 10/27/2010 | CN101148975B Horizontal well fastener-unlatching salvaging device and fastener-unlatching salvaging method thereof |
| 10/26/2010 | US7819180 High-energy gas fracture apparatus for through-tubing operations |
| 10/20/2010 | CN201610731U 套铣打捞一体化控制工具 Washover salvage integrated control tools |
| 10/14/2010 | US20100258314 Jars for Wellbore Operations |
| 10/14/2010 | US20100257927 Electromagnetic Free Point Tool and Methods of Use |
| 10/07/2010 | US20100252275 Lateral Well Locator and Reentry Apparatus and Method |
| 10/06/2010 | CN201599001U 带大范围母锥的套铣打捞工具 Washover fishing tools with a wide range of female cones |
| 10/06/2010 | CN201598999U 通用型投捞器 Universal cast fishing device |
| 10/06/2010 | CN101852068A Magnetic valve fisher |
| 09/30/2010 | US20100243270 Method and apparatus for a packer assembly |
| 09/30/2010 | US20100243240 Device and method for feeding particles into a stream |
| 09/29/2010 | CN201593389U Whipstock fishing tool |
| 09/29/2010 | CN201593388U Auxiliary jam release device for coal bed gas drilling |
| 09/23/2010 | US20100236782 Ball catcher apparatus for use in fracturing of formations surrounding horizontal oil and gas wells, and method for using same |
| 09/22/2010 | CN201588580U Combined type fish top cleaning fisher |
| 09/22/2010 | CN201588579U Multifunctional integrated inward fishing tool |
| 09/15/2010 | CN201581844U Returnable slide block bit hook |
| 09/15/2010 | CN201581843U Salvageable safety joint of whipstock |
| 09/15/2010 | CN201581842U Anti-run back-off device |
| 09/08/2010 | CN201574713U Downhole falling object catch sleeve |
| 09/08/2010 | CN201574712U Underground junk fishing collar for oilfields |
| 09/08/2010 | CN201574711U Downhole steel wire operation tool |
| 09/08/2010 | CN201574710U Abrasion-resistant fishing head of cone fisher |
| 09/08/2010 | CN101824966A Device for jetting ultrashort radius horizontal hole by using high-pressure water |
| 09/02/2010 | WO2010096860A1 Head assembly |
| 09/02/2010 | CA2752894A1 Head assembly |
| 09/01/2010 | CN201567996U Deep well magnetic anti-sticking device |
| 09/01/2010 | CN201567995U Positive inverted back-off device assembly |
| 08/31/2010 | US7784564 Method to perform operations in a wellbore using downhole tools having movable sections |
| 08/26/2010 | WO2010096485A1 Devices, systems, and methods for equalizing pressure in a gas well |
| 08/26/2010 | US20100212900 Running and Cement Tubing |
| 08/25/2010 | CN201560735U Slip-type underground restrictor fishing tool |
| 08/25/2010 | CN201560734U Wabbing workover vehicle |
| 08/25/2010 | CN201560718U Construction tube |
| 08/24/2010 | US7779912 Well tool having magnetically coupled position sensor |
| 08/24/2010 | US7779911 Method and means for providing time delay in downhole well operations |
| 08/19/2010 | US20100206580 Tools and Methods Useful with Wellbore Reverse Circulation |
| 08/19/2010 | US20100206568 Devices, Systems and Methods for Equalizing Pressure in a Gas Well |
| 08/18/2010 | CN201554406U Falling instrument fisher |
| 08/18/2010 | CN201554405U Hydraulic grappling tool |
| 08/18/2010 | CN201554404U Mobile petroleum drilling tool jar |
| 08/18/2010 | CN201554403U Eccentric comb-tooth tool extractor |
| 08/17/2010 | US7775280 Jars for wellbore operations |
| 08/12/2010 | US20100200236 Method of Circulating While Retrieving Bottom Hole Assembly in Casing |
| 08/11/2010 | CN201546662U Rear-mounted underground throttler |
| 08/11/2010 | CN201546654U Spear for instruments in pipes |
| 08/11/2010 | CN201546653U Multifunctional fishing tool |
| 08/11/2010 | CN201546652U Complex down-hole fishing tool |
| 08/11/2010 | CN101798911A Underwater wellhead reclaiming tool |
| 08/10/2010 | CA2471789C Method and apparatus for backing off a tubular member from a wellbore |
| 08/04/2010 | CN201539223U Oil pipe coupling jar |
| 08/03/2010 | US7766087 Methods and apparatus for placement of well equipment |
| 07/29/2010 | US20100186945 Magnet fixing device in a cleaning tool |
| 07/28/2010 | CN201535143U Full mechanical type drilling jar |
| 07/27/2010 | CA2527390C Downhole fishing extension sub with cutting elements therein |
| 07/22/2010 | US20100181789 Milled Packer Retaining Tool with Reverse Circulation |
| 07/22/2010 | US20100181064 Multi-Purpose Well Servicing Apparatus |
| 07/21/2010 | CN201531235U Novel rod-shaped downhole junk fisher |
| 07/15/2010 | US20100175888 Downhole Device Actuator and Method |