| Patents for E21B 31 - Fishing for or freeing objects in boreholes or wells (3,788) |
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| 12/15/2005 | US20050274524 Magnet arrangement for use on a downhole tool |
| 12/08/2005 | US20050269138 Spearhead assembly |
| 12/08/2005 | US20050269105 Apparatus for facilitating the connection of tubulars using a top drive |
| 12/08/2005 | US20050269081 Positive engagement indicator for wireline fishing operations |
| 12/08/2005 | US20050268776 Explosive pipe severing tool |
| 12/07/2005 | CN2744827Y Retractable slider slips fishing spear |
| 11/30/2005 | EP1090206B1 Tubular injector with snubbing jack and oscillator |
| 11/30/2005 | CN2743530Y Under well hydraulic fishing tool |
| 11/29/2005 | CA2403948C Apparatus and method for downhole well equipment and process management,identification, and actuation |
| 11/24/2005 | US20050257931 Apparatus and method of applying force to a stuck object in a wellbore |
| 11/17/2005 | WO2005108737A1 Latch mechanism guide |
| 11/15/2005 | CA2309054C Flexible sinker bar assemblies |
| 11/09/2005 | CN2739358Y High-energy fracturing device for oil-transfer pipe construction |
| 11/09/2005 | CN2739347Y Step type hydraulic booster release device |
| 11/03/2005 | WO2005045176A3 Field adjustable impact jar |
| 11/01/2005 | US6959765 Explosive pipe severing tool |
| 10/26/2005 | CN1688789A Method for removing gravel pack screens |
| 10/20/2005 | US20050230154 Downhole drill string having a collapsible subassembly |
| 10/20/2005 | US20050230115 Tubing or drill pipe conveyed downhole tool system with releasable wireline cable head |
| 10/20/2005 | US20050230101 Method and apparatus to vibrate a downhole component |
| 10/18/2005 | CA2286187C Apparatus for removing an item from a wellbore |
| 10/13/2005 | US20050224226 Force Transfer Apparatus to Assist Release of Loaded Member |
| 10/12/2005 | CN2732985Y Multipurpose well-repairing fishing collar with a fishing grab |
| 10/12/2005 | CN2732984Y Multipurpose hydraulic junk basket |
| 10/11/2005 | CA2286815C Downhole coiled tubing recovery apparatus |
| 09/29/2005 | US20050211429 Dual sensor freepoint tool |
| 09/27/2005 | US6948560 Jar for use in a downhole toolstring |
| 09/22/2005 | WO2005059296A3 Side entry sub hydraulic wireline cutter |
| 09/15/2005 | WO2005085585A1 A jar for use in a downhole toolstring |
| 09/15/2005 | US20050199398 Method and apparatus for retrieving an object from a well bore |
| 09/15/2005 | CA2555982A1 A jar for use in a downhole toolstring |
| 09/14/2005 | CN2725509Y Multifunction composite fishing drum |
| 09/13/2005 | US6942039 Flapper valve and associated method for single trip retrieval of packer tools |
| 09/13/2005 | US6942035 Method and apparatus for retrieving equipment from a well |
| 09/09/2005 | WO2005083227A1 Device and method for laying rigid tubular conduits |
| 08/31/2005 | EP1568847A2 Method and apparatus for handling tubular goods |
| 08/31/2005 | CN2721861Y Reversible bulldog spear for declined well |
| 08/30/2005 | US6935427 Plunger conveyed plunger retrieving tool and method of use |
| 08/30/2005 | CA2391713C Whipstock and retrieval method and apparatus |
| 08/25/2005 | US20050183889 Jar for use in a downhole toolstring |
| 08/23/2005 | CA2270224C Hydraulic impact tool for a well |
| 08/16/2005 | CA2359703C Method of releasing stuck pipe or tools and spotting fluids therefor |
| 08/11/2005 | WO2005073499A1 A collection device for drilling fluid |
| 08/10/2005 | CN2716495Y Fishing head of throwing and fishing device |
| 08/09/2005 | US6926082 Wireline fishing safety sleeve |
| 08/02/2005 | US6923260 Mitigation of proppant sticking in removing downhole tools |
| 08/02/2005 | CA2227941C Method and apparatus for retrieving downhole tools |
| 07/27/2005 | CN2713125Y Fishing and milling tool |
| 07/21/2005 | US20050155758 Well tubing/casing vibratior apparatus |
| 07/14/2005 | US20050150693 Downhole resettable jar tool with axial passageway and multiple biasing means |
| 07/13/2005 | CN2709649Y Adsorption guiding multifunction fisher |
| 07/12/2005 | CA2304664C An apparatus for facilitating the connection of tubulars using a top drive |
| 06/30/2005 | WO2005059296A2 Side entry sub hydraulic wireline cutter |
| 06/30/2005 | US20050139357 Downhole tool |
| 06/23/2005 | US20050133227 Side entry sub hydraulic wireline cutter |
| 06/21/2005 | US6907927 Method and apparatus to vibrate a downhole component |
| 06/16/2005 | US20050126828 Self-blocking fishing device |
| 06/15/2005 | EP1541801A2 Method and apparatus to vibrate a downhole component |
| 06/15/2005 | EP1540129A1 Downhole drill string having a collapsible subassembly |
| 06/14/2005 | US6905114 Shock absorbing and shock force generating apparatus with shear pin for an oil pump and method therefor |
| 06/12/2005 | CA2472857A1 Self-blocking fishing device |
| 06/09/2005 | US20050121231 Energy accelerator |
| 06/08/2005 | EP1021635B1 Gas-filled accelerator |
| 06/08/2005 | CN2703866Y Fishing spear for borehole instrument |
| 06/08/2005 | CN2703865Y Flexible sunk-matter aalvage grinding-milling tool |
| 06/01/2005 | CN2703118Y Direction deflecting device fishing indicator |
| 06/01/2005 | CN2703115Y Suspension positioning recoverable whipstocks |
| 05/31/2005 | US6899182 Method of screen or pipe expansion downhole without addition of pipe at the surface |
| 05/25/2005 | EP1432886B1 Disconnect for use in a wellbore |
| 05/24/2005 | US6896060 Downhole jarring tool adjuster |
| 05/19/2005 | WO2005045176A2 Field adjustable impact jar |
| 05/17/2005 | CA2283958C Abnormal torque absorber for drilling |
| 05/12/2005 | WO2005042916A1 Running and cementing tubing |
| 05/11/2005 | EP1454034B1 Method of freeing stuck drill pipe |
| 05/10/2005 | CA2257432C Method and device for facilitating the insertion of a coiled tube into a well and for loosening stuck objects in a well |
| 05/05/2005 | US20050092495 Jar with adjustable trigger load |
| 05/05/2005 | US20050092494 Field adjustable impact jar |
| 05/05/2005 | US20050092484 Downhole tool with pressure balancing |
| 05/04/2005 | EP1373676A4 An apparatus for retrieving metal debris from a well bore |
| 04/27/2005 | CN2695615Y Multifunction well special fisher |
| 04/27/2005 | CN2695614Y Compound fish top fisher |
| 04/13/2005 | CN2692335Y Double gear fishing device |
| 04/12/2005 | CA2357754C Lining removal method, system and components thereof |
| 04/06/2005 | EP1520084A1 Corrugated downhole tubulars |
| 04/06/2005 | CN2690574Y Flat fish oil push tube trip spear for small diameter hole |
| 04/06/2005 | CN2690573Y Two purpose machine grabber for dredging and drilling well |
| 03/30/2005 | CN1602386A Method of freeing stuck drill pipe |
| 03/29/2005 | CA2260196C Apparatus and method for retrieving an object from a wellbore |
| 03/23/2005 | EP1228290A4 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 03/22/2005 | CA2276169C Downhole cutting separator |
| 03/22/2005 | CA2229800C Apparatus and method for performing imaging and downhole operations at work site in wellbores |
| 03/17/2005 | US20050056427 Downhole force generator and method for use of same |
| 03/16/2005 | EP1226336A4 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 03/16/2005 | CN2685558Y Hydraulic controlling device for preventing workover rig drick from overturning |
| 03/16/2005 | CN2685543Y Cement paste vortex generator |
| 03/15/2005 | US6866104 Drop in dart activated downhole vibration tool |
| 03/15/2005 | US6866096 E-line downhole jarring tool |
| 03/15/2005 | CA2480537A1 Downhole force generator and method for use of same |
| 03/10/2005 | US20050051343 Apparatus for facilitating the connection of tubulars using a top drive |
| 03/09/2005 | CN2683832Y Down-hole monitoring salvaging machine |