| Patents for E21B 31 - Fishing for or freeing objects in boreholes or wells (3,788) |
|---|
| 06/04/2008 | CN101191409A Recoverable apparatus at bottom of casing tube drilled well |
| 05/28/2008 | CN201065746Y Limited quantity fisher |
| 05/22/2008 | US20080115941 Method for releasing stuck drill string |
| 05/21/2008 | CN201062497Y down-hole junk salvaging contrivance |
| 05/21/2008 | CN101184904A Method and means for providing time delay in downhole well operations |
| 05/14/2008 | CN201059172Y Polymer flooding eccentric test grappling tool |
| 05/13/2008 | US7370709 Subterranean magnetic field protective shield |
| 05/08/2008 | WO2008036815A3 Overshot tool for retrieving an object in a well and methods of use therefor |
| 05/07/2008 | CN201057007Y Reversible loose-leaf type fishing barrel |
| 05/07/2008 | CN201057006Y High-efficiency rinsing and fishing device |
| 05/07/2008 | CN201057005Y Polished rod latch jack |
| 05/06/2008 | US7367397 Downhole impact generator and method for use of same |
| 05/01/2008 | US20080099205 Circumferentially loaded slip-type overshot retrieval tool |
| 05/01/2008 | US20080099201 Contaminant excluding junction and method |
| 04/30/2008 | EP1915505A1 Method and device for releasing a block on a bore-crown during a boring process |
| 04/24/2008 | US20080093870 Two-door elevator |
| 04/23/2008 | CN201050319Y Striking type window-opening tool whipstock salvaging device |
| 04/15/2008 | US7357183 Magnetic fishing tool and method |
| 04/01/2008 | US7350584 Formed tubulars |
| 03/27/2008 | WO2008036815A2 Overshot tool for retrieving an object in a well and methods of use therefor |
| 03/26/2008 | EP1902195A1 Downhole force generator |
| 03/26/2008 | CN201041010Y Highly effective grinding and fishing integral type milling tool |
| 03/26/2008 | CN101148975A Horizontal well fastener-unlatching salvaging device and fastener-unlatching salvaging method thereof |
| 03/25/2008 | US7347287 Hydraulic timing device |
| 03/20/2008 | US20080066914 Overshot tool for retrieving an object in a well and methods of use therefor |
| 03/19/2008 | CN201037387Y Hydraulic pipe pulling equipment |
| 03/19/2008 | CN201037386Y Salvaging head for logging instrument |
| 03/18/2008 | US7343977 Translating downhole tool |
| 03/13/2008 | WO2008030620A1 Method of and system for determining the free point in a drill pipe |
| 03/13/2008 | CA2662762A1 Method of and system for determining the free point in a drill pipe |
| 03/12/2008 | EP1896689A2 Pipe running tool having a cement path |
| 03/12/2008 | EP1896688A2 Pipe running tool having a primary load path |
| 03/12/2008 | EP1896687A1 Pipe running tool having internal gripper |
| 03/12/2008 | CN201034019Y Salvaging adaptor auger stem hook |
| 03/12/2008 | CN101139915A Casing milling salvaging adaptor for oil well |
| 03/06/2008 | US20080053662 Electrically operated well tools |
| 03/05/2008 | CN201031643Y Down-hole salvaging release tools |
| 03/04/2008 | US7337852 Run-in and retrieval device for a downhole tool |
| 02/28/2008 | US20080047710 Apparatus and Method for Freeing Deployment Cables Stuck in a Wellbore |
| 02/28/2008 | CA2833943A1 Releasing and recovering tool |
| 02/27/2008 | CN201027515Y Returnable milling fisher |
| 02/27/2008 | CN201027514Y Sucker rod fisher |
| 02/26/2008 | CA2376211C Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 02/20/2008 | EP1888871A1 Casing and drill pipe filling and circulation apparatus |
| 02/20/2008 | CN201024950Y Cable cutter for under-well measurement and adjustment instrument |
| 02/20/2008 | CN201024949Y Under-well droppings dragger |
| 02/20/2008 | CN201024948Y Milling and dragging canister for drilling bridge plug cover |
| 02/20/2008 | CN201024938Y A hydraulic pressure release and salvage tool |
| 02/19/2008 | US7331392 Pressure range delimited valve |
| 02/19/2008 | CA2471394C Hydraulic overshot tool without a nozzle, and method of retrieving a cylinder |
| 02/13/2008 | CN101122215A Internal shoring type salvaging device |
| 02/07/2008 | WO2008016308A1 Mechanical trigger arrangement |
| 02/07/2008 | US20080029276 Downhole tool retrieval and setting system |
| 02/07/2008 | US20080029263 Annular flow shifting device |
| 02/07/2008 | CA2657609A1 Mechanical trigger arrangement |
| 02/05/2008 | US7325614 Method for releasing stuck drill string |
| 01/30/2008 | EP1348063B1 Hydraulic jar device |
| 01/30/2008 | CN201013287Y Retrievable fishing barrel for reclaiming bridging plug |
| 01/30/2008 | CN201013286Y Deep-well fishing gear |
| 01/30/2008 | CN201013285Y Oil conduit fish tail high-speed cutting device |
| 01/17/2008 | WO2008007066A1 Selective agitation of downhole apparatus |
| 01/17/2008 | WO2007030336A3 C-plate assembly for use in a cable guided fishing assembly |
| 01/17/2008 | CA2658162A1 Selective agitation of downhole apparatus |
| 01/16/2008 | EP1878869A2 A jar for use in a downhole toolstring |
| 01/16/2008 | CN201007190Y Self-cleaning type multiple wheels latch jack |
| 01/09/2008 | CN201003388Y Pawl type boring tool salvager |
| 01/09/2008 | CN201003380Y Forward and reversing device |
| 01/08/2008 | CA2448550C Dual sensor freepoint tool |
| 01/02/2008 | EP1871975A1 Method and means for providing time delay in downhole well operations |
| 12/27/2007 | WO2007149112A1 Stuck drill pipe additive and method |
| 12/27/2007 | CA2656513A1 Stuck drill pipe additive and method |
| 12/25/2007 | US7311346 Arrangement in a gripper mechanism for a free pipe/rodlike end portion of a downhole tool |
| 12/25/2007 | US7311149 Jar with adjustable preload |
| 12/18/2007 | CA2485210C Packer retriever |
| 12/13/2007 | WO2007140612A1 Tools and methods useful with wellbore reverse circulation |
| 12/13/2007 | US20070284113 System And Method For Rigging Up Well Workover Equipment |
| 12/13/2007 | CA2654429A1 Manipulator tool and tool catcher useful with wellbore reverse circulation |
| 12/11/2007 | CA2500219C Latch mechanism guide |
| 12/04/2007 | CA2504578C Force transfer apparatus to assist release of loaded member |
| 12/04/2007 | CA2378518C Downhole anchoring tools conveyed by non-rigid carriers |
| 11/29/2007 | WO2007136667A1 Downhole activated packer plug magnetic debris tool |
| 11/29/2007 | US20070272404 Well cleanup tool with real time condition feedback to the surface |
| 11/27/2007 | US7299886 Stabilized down hole drilling motor |
| 11/27/2007 | US7299885 Downhole drill string having a collapsible subassembly and method of loosening a stuck drillstring |
| 11/27/2007 | US7299872 Hydraulic-mechanical jar tool |
| 11/22/2007 | US20070267879 Fish wire kit for use in obtaining objects from deep, small, narrow spaces |
| 11/22/2007 | US20070267196 Downhole activated packer plug magnetic debris tool |
| 11/21/2007 | CN200978643Y Rolling sliding tooth salvaging device |
| 11/21/2007 | CN200978642Y Side-opening three port salvaging device |
| 11/21/2007 | CN200978641Y Swab rubber cylinder salvaging basket |
| 11/21/2007 | CN101074598A Wellbottom fishing grab |
| 11/20/2007 | US7296638 Orientation device for a core sample |
| 11/20/2007 | CA2419231C Underwater tool with sealing device |
| 11/14/2007 | CN200975597Y Air-actuated lubricant oil control device |
| 11/13/2007 | CA2478019C Arrangement in a gripper mechanism for a free pipe/rodlike end portion of a downhole tool |
| 11/06/2007 | US7290604 Downhole tool with pressure balancing |
| 10/31/2007 | CN200968190Y Window opening bailer |
| 10/24/2007 | EP1846531A1 Spotting fluid compositions and associated methods |
| 10/24/2007 | CN200964843Y Integral testing thrower-salvager |
| 10/24/2007 | CN200964816Y Lateral well whipstock-salvaging tool |