| Patents for E21B 31 - Fishing for or freeing objects in boreholes or wells (3,788) |
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| 09/03/2003 | CN2570446Y Oil well bottom fragmental deposit and small junk latch jack |
| 08/28/2003 | US20030161689 Underwater tool |
| 08/21/2003 | WO2003069116A1 Modular bi-directional hydraulic jar with rotating capability |
| 08/21/2003 | US20030155159 Method and apparatus for handling tubular goods |
| 08/19/2003 | US6607031 Screened boot basket/filter |
| 08/14/2003 | US20030150609 Modular bi-directional hydraulic jar with rotating capability |
| 08/13/2003 | EP1334257A2 Jar with electrical conductor |
| 08/07/2003 | WO2003064808A1 Drop in dart activated downhole vibration tool |
| 08/06/2003 | CN2564736Y Tool for cutting and fishing pipe string of oil field downhole |
| 08/05/2003 | US6601889 Air-tight bailer system |
| 07/31/2003 | US20030141055 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 07/29/2003 | CA2062928C Method and apparatus to cut and remove casing |
| 07/23/2003 | EP0862679B1 Downhole equipment |
| 07/08/2003 | US6588509 Well casing installation and removal apparatus and method |
| 07/08/2003 | US6588505 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 07/02/2003 | CN2558758Y Device for self-locking fishing bent fishhead rod in casing |
| 06/25/2003 | EP1056923B1 System, apparatus and method for facilitating retrieval of an item from a well |
| 06/25/2003 | EP0819207B1 Method for improved water well production |
| 06/25/2003 | CN2557687Y Free stick power aid |
| 06/19/2003 | WO2003050383A1 Method of freeing stuck drill pipe |
| 06/17/2003 | US6578635 Lining removal method, system and components thereof |
| 06/12/2003 | WO2003048511A1 Hydraulic-mechanical jar tool |
| 06/12/2003 | US20030106691 Well pipe extraction apparatus |
| 06/11/2003 | EP1255910A4 Improved tubular running tool |
| 06/10/2003 | US6575236 Device for manipulating a tool in a well tubular |
| 06/04/2003 | EP1315882A1 Method and device to free stuck objects |
| 06/03/2003 | US6571870 Method and apparatus to vibrate a downhole component |
| 05/28/2003 | CN2553102Y Underground cable bridging plug mill fishing tool for formation testing |
| 05/28/2003 | CN2553101Y Preset protecting device for preventing soft matter falling into well |
| 05/28/2003 | CN2553100Y Clamp-on self-fishing mill shoe |
| 05/21/2003 | EP1312752A2 System, apparatus and method for facilitating retrieval of an item from a well |
| 05/20/2003 | US6564885 Up-hole overshot and safety drilling apparatus |
| 05/20/2003 | US6564871 High pressure permanent packer |
| 05/08/2003 | WO2003038232A1 Orientation device for a core sample |
| 05/08/2003 | CA2734723A1 Orientation device for a core sample |
| 05/07/2003 | CN2549168Y Downhole fishing claw |
| 05/07/2003 | CN2549167Y Fishing claw of sucker rod |
| 05/05/2003 | CA2408425A1 Apparatus and method for downhole well equipment and process management, identification, and operation |
| 05/02/2003 | EP1306657A2 Air-tight bailer system |
| 04/29/2003 | CA2044662C Fishing tool for retrieving implements from a hole |
| 04/24/2003 | WO2003033859A1 Methods and apparatus to control downhole tools |
| 04/24/2003 | WO2003033855A2 Apparatus and methods for jarring |
| 04/24/2003 | US20030075940 Air-tight bailer system |
| 04/24/2003 | US20030075329 Apparatus and methods for jarring |
| 04/24/2003 | CA2643187A1 Methods and apparatus to control downhole tools |
| 04/24/2003 | CA2405257A1 Air tight bailer system |
| 04/22/2003 | US6550536 Downhole coiled tubing recovery apparatus |
| 04/22/2003 | CA2278526C Bottom rotation shaft actuator |
| 04/17/2003 | WO2003031767A1 Wellbore recovery operation |
| 04/17/2003 | US20030070842 Methods and apparatus to control downhole tools |
| 04/16/2003 | EP1301683A1 Underwater tool |
| 04/16/2003 | EP1153198B1 Process and arrangement for retrieving of equipment from bore holes |
| 04/10/2003 | WO2003029605A1 Disconnect for use in a wellbore |
| 04/08/2003 | US6543556 Abnormal torque absorber for drilling |
| 04/08/2003 | CA2338510C Aphron-containing well drilling and servicing fluids of enhanced stability |
| 04/03/2003 | WO2003027434A1 Arrangement in a gripper mechanism for a free pipe/rodlike end portion of a downhole tool |
| 04/03/2003 | US20030062169 Disconnect for use in a wellbore |
| 03/27/2003 | WO2003025337A1 Striking train for a ground-boring machine |
| 03/25/2003 | US6537951 Fluid and method for releasing tubular elements stuck in a well |
| 03/13/2003 | US20030047318 Whip retrieval method and apparatus |
| 03/13/2003 | US20030047312 Drill pipe explosive severing tool |
| 03/04/2003 | US6527048 Hydraulically actuated downhole coupler system, especially for combination washover/fishing tool assemblies |
| 02/26/2003 | EP0927296B1 Double acting hydraulic jar |
| 02/26/2003 | CN2537808Y New upper vibrating device with drill |
| 02/26/2003 | CN1399703A Device for manipulating tool in well tubular |
| 02/20/2003 | WO2003014526A1 Dual sensor freepoint tool |
| 02/19/2003 | CN2536777Y Milling box tap |
| 02/13/2003 | WO2003012250A1 Downhole vibrating device |
| 02/11/2003 | US6516878 Downhole tension swivel sub |
| 02/06/2003 | US20030024702 Dual sensor freepoint tool |
| 02/05/2003 | CN2534360Y Downhole mechanical fishing spear |
| 01/16/2003 | WO2002095180A3 Impact downhole tool |
| 01/15/2003 | EP1274992A1 Apparatus and method for downhole well equipment and process management, identification, and actuation |
| 01/07/2003 | US6502638 Method for improving performance of fishing and drilling jars in deviated and extended reach well bores |
| 01/02/2003 | EP1169406A4 Method of releasing stuck pipe or tools and spotting fluids therefor |
| 12/24/2002 | US6497280 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 12/18/2002 | EP1266119A1 Method and apparatus for handling tubular goods |
| 12/12/2002 | WO2002086279A8 Apparatus for running tubulars |
| 12/10/2002 | US6491117 Apparatus for retrieving metal debris from a well bore |
| 11/28/2002 | WO2002095180A2 Impact downhole tool |
| 11/21/2002 | WO2002092960A1 Lockable overshot |
| 11/19/2002 | US6481505 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 11/19/2002 | US6481495 Downhole tool with electrical conductor |
| 11/13/2002 | EP1255910A1 Improved tubular running tool |
| 11/07/2002 | US20020162655 Screened boot basket/filter |
| 11/06/2002 | EP1254300A1 Method and apparatus for retrieving equipment from a well |
| 11/05/2002 | US6474421 Downhole vibrator |
| 10/31/2002 | WO2002086279A1 Apparatus for running tubulars |
| 10/31/2002 | US20020157872 Up-hole overshot and safety drilling apparatus |
| 10/31/2002 | US20020157868 Well casing installation and removal apparatus and method |
| 10/29/2002 | US6471254 Method and apparatus for gripping objects |
| 10/24/2002 | WO2001059253A9 Improved tubular running tool |
| 10/24/2002 | US20020152856 Hydraulic wireline cutter |
| 10/17/2002 | WO2002081859A1 An apparatus for retrieving metal debris from a well bore |
| 10/17/2002 | US20020148609 Spotting fluid for differential sticking |
| 10/17/2002 | US20020148606 Method and apparatus to vibrate a downhole component by use of acoustic resonance |
| 10/15/2002 | US6464014 Downhole coiled tubing recovery apparatus |
| 10/03/2002 | WO2002025051A3 Jar with electrical conductor |
| 09/26/2002 | WO2002075109A1 Double-cone device and pump |
| 09/26/2002 | WO2002075102A1 Downward energized motion jars |