| Patents for E21B 31 - Fishing for or freeing objects in boreholes or wells (3,788) |
|---|
| 09/25/2002 | EP1243748A1 Double-cone device and pump |
| 09/24/2002 | US6453997 Hydraulically driven fishing jars |
| 09/19/2002 | WO2002055627A3 Spotting fluid for differential sticking |
| 09/18/2002 | CN2511785Y Under well multifunctional fishing tool |
| 09/12/2002 | US20020125013 Spotting fluid for differential sticking |
| 09/11/2002 | EP1239112A2 Method and apparatus to vibrate a downhole component |
| 09/05/2002 | US20020121378 Method and apparatus to vibrate a downhole component |
| 09/01/2002 | CA2372366A1 Method and apparatus to vibrate a downhole component by use of acoustic resonance |
| 08/27/2002 | US6439303 Downhole magnetic retrieval apparatus |
| 08/22/2002 | US20020112866 Self-resetting impact device |
| 08/21/2002 | EP1232324A1 Device for manipulating a tool in a well tubular |
| 08/20/2002 | US6435276 Spotting fluid for differential sticking |
| 08/13/2002 | US6431626 Tubular running tool |
| 08/13/2002 | US6431272 Controlled slow descent bailer |
| 08/08/2002 | US20020104652 Methods of performing downhole operations using orbital vibrator energy sources |
| 08/08/2002 | US20020104648 Controlled slow descent bailer |
| 08/07/2002 | EP1228290A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 08/07/2002 | CN2504382Y Salverage anchor for sealing checking and sealed section of water filling well |
| 07/31/2002 | EP1226336A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 07/31/2002 | EP0898638B1 Washpipe stabilisation |
| 07/31/2002 | CN1361346A Repeated pressure applying and releasing pulsed unblocking process |
| 07/30/2002 | US6425615 Overshot tool |
| 07/23/2002 | US6422326 Aphron-containing well drilling and servicing fluids of enhanced stability |
| 07/18/2002 | WO2002055627A2 Spotting fluid for differential sticking |
| 07/18/2002 | US20020092651 Downhole coiled tubing recovery apparatus |
| 07/11/2002 | WO2002053868A1 Hydraulic jar device |
| 07/10/2002 | CN2499566Y Monitor for downhole fishing |
| 07/02/2002 | US6412560 Tubular injector with snubbing jack and oscillator |
| 07/02/2002 | CA2212411C Method for improved water well production |
| 06/13/2002 | WO2001004459A9 Downhole anchoring tools conveyed by non-rigid carriers |
| 06/12/2002 | EP1212515A2 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 05/29/2002 | EP1208283A1 Hydraulic jar |
| 05/28/2002 | CA2160647C Helical bearing anchor catcher |
| 05/16/2002 | US20020057151 Apparatus for retrieving metal debris from a well bore |
| 05/15/2002 | CN2491598Y Salvagable oil-wall pump fixed valve assembly |
| 05/14/2002 | CA2182491C Bidirectional hydraulic jar |
| 05/10/2002 | WO2002036935A1 Methods of performing downhole operations using orbital vibrator energy sources |
| 05/09/2002 | US20020053434 Downhole anchoring tools conveyed by non-rigid carriers |
| 05/09/2002 | US20020053428 Reverse circulation junk basket |
| 05/02/2002 | US20020050930 Apparatus and method for downhole well equipment and process management, identification, and operation |
| 04/16/2002 | US6371209 Casing installation and removal apparatus and method |
| 03/28/2002 | WO2002025051A2 Jar with electrical conductor |
| 03/19/2002 | US6359569 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 03/19/2002 | US6357539 Apparatus for retrieving metal objects from a wellbore |
| 03/19/2002 | US6357528 One-trip casing cutting & removal apparatus |
| 03/14/2002 | WO2002020940A1 Method and device to free stuck objects |
| 03/12/2002 | US6354386 Apparatus for retrieving metal objects from a wellbore |
| 03/07/2002 | US20020027005 Hydraulically driven fishing jars |
| 02/27/2002 | EP0879342B1 Wireline/coiled tubing retrievable well pump |
| 02/27/2002 | CN1337985A Method of releasing stuck pipe or tools and spotting fluids therefor |
| 02/27/2002 | CN1079881C Hydraulic device to be connected in pipe string |
| 02/20/2002 | CN2477813Y Throwable hand slider type crowfoot |
| 02/14/2002 | WO2000061909A9 Tubular running tool |
| 02/13/2002 | EP1090206A4 Tubular injector with snubbing jack and oscillator |
| 02/13/2002 | EP0975853A4 Downhole coiled tubing recovery apparatus |
| 02/06/2002 | CN2475824Y Salvaging barrel |
| 02/06/2002 | CN2475818Y Hydraulic bend joint |
| 02/05/2002 | US6343649 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 01/24/2002 | WO2002006627A1 Underwater tool |
| 01/23/2002 | CN2473327Y Fisher for drilling bit matrix |
| 01/16/2002 | CN2471929Y Underground choke and fishing tool therefor |
| 01/16/2002 | CN2471927Y Oil production device for sand washover and without killing well |
| 01/16/2002 | CN2471921Y Salvage cylinder with window |
| 01/15/2002 | US6338387 Downward energized motion jars |
| 01/10/2002 | CA2352280A1 Downhole magnetic retrieval apparatus |
| 01/09/2002 | EP1169406A1 Method of releasing stuck pipe or tools and spotting fluids therefor |
| 01/02/2002 | EP1167685A2 Method of removing drill cuttings from a deviated borehole |
| 01/02/2002 | EP1025337A4 Method and apparatus for engaging an object |
| 01/02/2002 | EP0901561B1 A hydraulic device to be connected in a pipe string |
| 12/27/2001 | US20010054969 Apparatus and method for downhole well equipment and process management, identification, and actuation |
| 12/25/2001 | US6333700 Apparatus and method for downhole well equipment and process management, identification, and actuation |
| 12/11/2001 | US6328101 Impact enhancing tool |
| 12/05/2001 | CN2463533Y Lead pattern fishing tool |
| 12/04/2001 | US6325145 Pressure pulse attenuator |
| 11/29/2001 | WO2001073423A8 Apparatus and method for downhole well equipment and process management, identification, and actuation |
| 11/29/2001 | US20010045747 Method and apparatus for gripping objects |
| 11/22/2001 | WO2001088329A1 Method for vibrational impact on a pipe string in a borehole and devices for carrying out said method |
| 11/22/2001 | US20010043146 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 11/22/2001 | US20010042625 Apparatus for facilitating the connection of tubulars using a top drive |
| 11/22/2001 | US20010042617 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 11/14/2001 | EP1153198A1 Process and arrangement for retrieving of equipment from bore holes |
| 11/13/2001 | US6315043 Downhole anchoring tools conveyed by non-rigid carriers |
| 11/07/2001 | EP1152119A2 An apparatus for running tubulars into a borehole |
| 11/01/2001 | US20010035290 Washpipe stabilization system |
| 10/30/2001 | US6309002 Tubular running tool |
| 10/30/2001 | US6308781 Apparatus for retrieving metal objects from a wellbore |
| 10/30/2001 | US6308779 Hydraulically driven fishing jars |
| 10/18/2001 | WO2001038689A8 Device for manipulating a tool in a well tubular |
| 10/04/2001 | WO2001073423A1 Apparatus and method for downhole well equipment and process management, identification, and actuation |
| 10/04/2001 | EP1114116A4 Aphron-containing well drilling and servicing fluids of enhanced stability |
| 10/03/2001 | CN2451721Y Automatic device for flushing borehole |
| 09/27/2001 | WO2001071154A1 Method and apparatus for handling tubular goods |
| 09/26/2001 | CN2450378Y High-efficiency pumping rod fishing collar |
| 09/20/2001 | WO2001018357B1 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 09/19/2001 | CN2448914Y Bypass overshot |
| 09/18/2001 | US6290004 Hydraulic jar |
| 09/06/2001 | US20010018974 Downward energized motion jars |
| 08/30/2001 | WO2001063086A1 Method and apparatus for gripping objects |
| 08/28/2001 | US6279962 Safety joint |
| 08/23/2001 | US20010016561 Spotting fluid and method of treating a stuck pipe |