| Patents for E21B 31 - Fishing for or freeing objects in boreholes or wells (3,788) |
|---|
| 10/24/2007 | CN200964815Y Ring-shaped pressure reducing groove injection core ingot-pulling device |
| 10/24/2007 | CN200964814Y Whipstock-salvaging barrel |
| 10/24/2007 | CN200964813Y Grab type salvaging device |
| 10/24/2007 | CN101059069A Salvaging device |
| 10/24/2007 | CN101059064A Full-automatic pressurized operation machine |
| 10/23/2007 | US7284607 System and technique for orienting and positioning a lateral string in a multilateral system |
| 10/23/2007 | CA2271620C Downhole magnetic debris collector |
| 10/17/2007 | CN200961460Y Sliding block type spear capable of clasping and releasing |
| 10/17/2007 | CN200961459Y Logging neutron source salvager |
| 10/17/2007 | CN100343476C Method for removing gravel pack screens |
| 10/16/2007 | US7281575 Field adjustable impact jar |
| 10/11/2007 | WO2007114706A1 Adapter for directional control of two oppositely directed hydraulic jars |
| 10/10/2007 | EP1697613A4 Field adjustable impact jar |
| 10/09/2007 | CA2465019C Well tubing/casing vibrator apparatus |
| 10/09/2007 | CA2282868C Cable overshot apparatus |
| 10/04/2007 | US20070227736 System and method for unsticking a tool stuck in a wellbore |
| 10/03/2007 | CN200955367Y Fishing device |
| 10/03/2007 | CN200955362Y Fully-automatic hot operation machine |
| 09/30/2007 | CA2582875A1 System and method for unsticking a tool stuck in a wellbore |
| 09/27/2007 | WO2007030293A3 Cable hanger for use in a cable guided fishing assembly |
| 09/26/2007 | CN200952386Y Three-protection packer |
| 09/26/2007 | CN200952372Y Well falling articles fishing device |
| 09/19/2007 | CN200949438Y Piston type hydraulic pipe finding device |
| 09/19/2007 | CN200949437Y Convenient salvaging fisher |
| 09/19/2007 | CN200949436Y Salvaging cup type grind shoe |
| 09/19/2007 | CN200949435Y Salvaging cup type grind shoe |
| 09/12/2007 | CN200946477Y Multifunctional hydraulic quit type reversing fishing device capable of resisting falling |
| 09/12/2007 | CN200946476Y Shaft bottom falling article fishing device |
| 09/11/2007 | US7267176 Downhole resettable jar tool with axial passageway and multiple biasing means |
| 09/11/2007 | CA2426258C An apparatus for retrieving metal debris from a well bore |
| 09/05/2007 | EP0931203B1 Apparatus and method for retrieving an object from a wellbore |
| 09/04/2007 | US7264060 Side entry sub hydraulic wireline cutter and method |
| 09/04/2007 | US7264055 Apparatus and method of applying force to a stuck object in a wellbore |
| 08/29/2007 | CN200940462Y Mechanical hydraulic drilling jar |
| 08/29/2007 | CN200940461Y Cable bumper jar |
| 08/29/2007 | CN200940458Y Feeding fishing tool for branch well re-insert guide device |
| 08/28/2007 | CA2434142C Spotting fluid for differential sticking |
| 08/23/2007 | US20070193751 Casing running and drilling system |
| 08/21/2007 | CA2403746C Method and apparatus for handling tubular goods |
| 08/16/2007 | US20070187112 Running and cementing tubing |
| 08/15/2007 | CN2934557Y Three-ball salvaging device |
| 08/15/2007 | CN2934556Y Composite joint for sand flushing and salvaging |
| 08/15/2007 | CN101018926A Downhole measurements during non-drilling operations |
| 08/14/2007 | US7255172 Hydrodynamic, down-hole anchor |
| 08/08/2007 | CN2931764Y Pumping rod fishing device |
| 08/02/2007 | WO2007030262B1 Spear head overshot for use in a cable guided fishing assembly |
| 07/31/2007 | US7249633 Release tool for coiled tubing |
| 07/31/2007 | CA2499612C Method for removing gravel pack screens |
| 07/24/2007 | US7246663 Positive engagement indicator for wireline fishing operations |
| 07/18/2007 | CN2923986Y Self-sliding type underground fishing tool |
| 07/11/2007 | CN2921262Y Lift pulling withdrawable fishing tool |
| 07/05/2007 | US20070151732 Downhole impact generator and method for use of same |
| 07/04/2007 | CN2918721Y 油水井钢丝打捞装置 Oil wells wire salvage device |
| 07/04/2007 | CN2918720Y Bumper stuck releasing device |
| 07/03/2007 | CA2474476C Drop in dart activated downhole vibration tool |
| 07/03/2007 | CA2465411C Hydraulic jar lock |
| 06/27/2007 | CN2916121Y Workover guide mechanism for horizontal lateral well |
| 06/27/2007 | CN2916111Y Releasing dragging device |
| 06/27/2007 | CN2916110Y Eccentric wear preventing grind shoe |
| 06/27/2007 | CN2916109Y Dredging whipstock device |
| 06/27/2007 | CN2916095Y Drill stem for horizontal well workover technology |
| 06/26/2007 | US7234545 Self-blocking safety device |
| 06/26/2007 | CA2460660C Hydraulic-mechanical jar tool |
| 06/20/2007 | CN2913585Y Punching-grinding-milling equipment |
| 06/14/2007 | WO2007030262A3 Spear head overshot for use in a cable guided fishing assembly |
| 06/14/2007 | US20070131426 Junk removal tool |
| 06/06/2007 | EP1792053A2 A highly-parallel, implicit compositional reservoir simulator for multi-million-cell models |
| 06/06/2007 | CN2908767Y Hydraulic jar |
| 06/06/2007 | CN1320252C Method of freeing stuck drill pipe |
| 05/31/2007 | US20070119591 Method for releasing stuck drill string |
| 05/30/2007 | EP1315882B1 Method and device to free stuck objects |
| 05/30/2007 | CN2906039Y Underground broken pipes dragging tools |
| 05/23/2007 | CN2903350Y Oil water well bridging plug mill salvaging machine |
| 05/23/2007 | CN2903349Y Inclined strong magnetic salvaging device |
| 05/22/2007 | US7219726 Method and apparatus to vibrate a downhole component |
| 05/17/2007 | US20070107894 Magnetic tool for retrieving metal objects from a well bore when using coil tubing |
| 05/17/2007 | CA2568053A1 Ball-activated mechanism for controlling the operation of a downhole tool |
| 05/16/2007 | CN2900767Y Downhole fishing device |
| 05/10/2007 | WO2007051970A1 Diverter plugs for use in well bores and associated methods of use |
| 05/10/2007 | WO2007051969A1 Diverter plugs for use in well bores and associated methods of use |
| 05/10/2007 | US20070102943 Coilable article retriever |
| 05/10/2007 | US20070102922 Device and method for laying rigid tubular pipes |
| 05/10/2007 | US20070102161 Magnetic fishing tool and method |
| 05/09/2007 | CN2898271Y Bell tap of jacket pipe |
| 05/09/2007 | CN2898270Y Backward fishing tool of wireless drill measuring equipment |
| 05/02/2007 | CN2895710Y Transverse cutting type grind shoe |
| 05/01/2007 | US7211549 Spotting fluid for use with oil-based muds and method of use |
| 05/01/2007 | CA2514669C System, apparatus and method for facilitating retrieval of an item from a well |
| 04/25/2007 | CN2893133Y Horizontal well lifting releasing socket |
| 04/19/2007 | WO2007041778A1 Overshot for down hole drilling operations |
| 04/19/2007 | CA2625066A1 Overshot for down hole drilling operations |
| 04/11/2007 | CN2888060Y Anti-drop releasing type left hand fishing spear |
| 04/11/2007 | CN2888059Y Hydraulic roller |
| 04/05/2007 | US20070074876 Apparatus for facilitating the connection of tubulars using a top drive |
| 04/05/2007 | US20070074624 Explosive pipe severing tool |
| 04/04/2007 | EP1003954B1 Impact enhancing tool |
| 04/04/2007 | CN2886065Y Releasable fishing tool with high tensile strength |
| 04/04/2007 | CN2886064Y Junk collecting device in sidetracked hole |
| 04/04/2007 | CN1942652A A jar for use in a downhole toolstring |
| 04/04/2007 | CN1940250A Active permanent-magnetic vibrator and block-proof and output-increasing method for oil well |