| Patents for E21B 23 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells (12,712) |
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| 10/08/2008 | CN201129149Y Mechanical type rotating anchoring device |
| 10/07/2008 | US7431096 Embedded flex-lock slip liner hanger |
| 10/07/2008 | US7431080 Anchor device to relieve tension from the rope socket prior to perforating a well |
| 10/07/2008 | US7431078 Using pipe shrinkage upon expansion to actuate a downhole tool |
| 10/07/2008 | CA2509468C Release tool for coiled tubing |
| 10/07/2008 | CA2319470C Apparatus for running two tubing strings into a well |
| 10/02/2008 | WO2008118022A1 A device for a kickover tool |
| 10/02/2008 | WO2007124041A3 A system and method for estimating supercharge pressure and initial pressure of a formation |
| 10/02/2008 | US20080236844 Packer setting device for high-hydrostatic applications |
| 10/02/2008 | US20080236841 Downhole Swivel Sub |
| 10/02/2008 | US20080236840 Thermal actuator |
| 10/02/2008 | US20080236838 Tool Trap Assembly and Method |
| 10/01/2008 | EP1975369A2 Method and system for accessing subterranean deposits from the surface |
| 10/01/2008 | CN201125689Y Deflecting tool for steel wire throwing and fetching operation |
| 10/01/2008 | CN201125688Y Rotating cementing tail tube hanger |
| 09/30/2008 | US7429934 Mud pulse landing assembly for use in directional drilling |
| 09/30/2008 | US7428933 Latchable hanger assembly and method for liner drilling and completion |
| 09/30/2008 | US7428932 Completion system for a well |
| 09/30/2008 | US7428928 Sealing spring mechanism for a subterranean well |
| 09/30/2008 | US7428927 Cement float and method for drilling and casing a wellbore with a pump down cement float |
| 09/30/2008 | CA2463611C Inflation tool with real-time temperature and pressure probes |
| 09/30/2008 | CA2418804C Subsea intervention system |
| 09/25/2008 | WO2008115167A1 Retievable oil and/or gas well blowout preventer |
| 09/25/2008 | WO2008089200A3 Multiple dart drop circulating tool |
| 09/25/2008 | US20080230233 Coupler retained liner hanger mechanism and methods of setting a hanger inside a wellbore |
| 09/24/2008 | CN101273182A 油井安全装置和相关的安全设施 Well safety devices and related security facilities |
| 09/23/2008 | US7426964 Release mechanism for downhole tool |
| 09/23/2008 | CA2480259C Retrievable through tubing whipstock apparatus having fluid-responsive pivotal anchoring members |
| 09/23/2008 | CA2409277C Wellbores utilizing fiber optic-based sensors and operating devices |
| 09/18/2008 | WO2008111844A1 Wireline tractor device |
| 09/18/2008 | WO2008076189A3 Downhole tool with slip releasing mechanism |
| 09/18/2008 | WO2005081803A3 Lubricant coating for expandable tubular members |
| 09/18/2008 | US20080223616 Tractor with improved valve system |
| 09/18/2008 | US20080223586 Ball release procedure and release tool |
| 09/18/2008 | US20080223584 Downhole retrieving tool and method |
| 09/18/2008 | US20080223572 Method for drilling and casing a wellbore with a pump down cement float |
| 09/18/2008 | US20080223571 Packer system and method |
| 09/18/2008 | CA2679601A1 Wireline tractor device |
| 09/17/2008 | CN201116456Y Oil well packing extractor |
| 09/17/2008 | CN100419205C Constant force actuator |
| 09/16/2008 | US7424918 Interposed joint sealing layer method of forming a wellbore casing |
| 09/16/2008 | US7424909 Drillable bridge plug |
| 09/16/2008 | CA2389618C Lock assembly |
| 09/16/2008 | CA2365333C Fluid controlled adjustable down-hole tool |
| 09/16/2008 | CA2315391C Drive and shear mechanism for downhole tool |
| 09/14/2008 | CA2623931A1 Passive centralizer |
| 09/12/2008 | WO2008109891A1 A casing patch |
| 09/12/2008 | WO2008107628A1 A valve |
| 09/12/2008 | CA2677926A1 A valve |
| 09/11/2008 | US20080217059 Tractor with improved valve system |
| 09/11/2008 | US20080217024 Downhole tool with closed loop power systems |
| 09/11/2008 | US20080217000 Casing patch |
| 09/11/2008 | US20080216609 Granular Particle Gripping Surface |
| 09/09/2008 | US7422070 Casing mandrel with well stimulation tool and tubing head spool for use with the casing mandrel |
| 09/09/2008 | US7422067 Deploying an assembly into a well |
| 09/09/2008 | US7422058 Reinforced open-hole zonal isolation packer and method of use |
| 09/04/2008 | WO2008104917A1 Method and apparatus for pipe-conveyed well logging |
| 09/04/2008 | WO2008104898A2 Well wall gripping element |
| 09/04/2008 | WO2008060893A3 Large bore packer and methods of setting same |
| 09/04/2008 | US20080210441 Method and Apparatus for Connecting, Installing, and Retrieving a Coiled Tubing-Conveyed Electrical Submersible Pump |
| 09/04/2008 | US20080210440 Liner anchor for expandable casing strings and method of use |
| 09/04/2008 | US20080210439 Tubular gripping device |
| 09/04/2008 | US20080210438 Downhole Safety Valve Apparatus and Method |
| 09/04/2008 | US20080210418 Split Body Swelling Packer |
| 09/04/2008 | CA2678054A1 Method and apparatus for pipe-conveyed well logging |
| 09/03/2008 | EP1965019A2 Subterranean well tool including a locking seal healing system |
| 09/03/2008 | EP1963617A1 Slotted slip element for expandable packer |
| 09/03/2008 | EP1963614A1 Method and apparatus to hydraulically bypass a well tool |
| 09/03/2008 | EP1963613A1 Plug retrieval and debris removal tool |
| 09/03/2008 | EP1238234B1 Ground energy transfer system and method |
| 09/03/2008 | CN201110172Y Apparatus for conveying reducing cable pressured into well |
| 09/03/2008 | CN201110143Y Fluid pressure tailpiece hanger |
| 09/02/2008 | US7419193 Tubing connector |
| 09/02/2008 | US7419009 Apparatus for radially expanding and plastically deforming a tubular member |
| 09/02/2008 | US7419001 Universal tubing hanger suspension assembly and well completion system and method of using same |
| 09/02/2008 | CA2389671C Device for manipulating a tool in a well tubular |
| 08/28/2008 | WO2008102280A1 Self-aligning open-hole tractor |
| 08/28/2008 | WO2008102117A1 Pressure activated locking slot assembly |
| 08/28/2008 | WO2008079782A3 Production actuated mud flow back valve |
| 08/28/2008 | US20080202769 Well Wall Gripping Element |
| 08/28/2008 | US20080202768 Device for Selective Movement of Well Tools and Also a Method of Using Same |
| 08/28/2008 | US20080202767 Drill Pipe Conveyance System for Slim Logging Tool |
| 08/28/2008 | US20080202766 Pressure Activated Locking Slot Assembly |
| 08/28/2008 | CA2677570A1 Pressure activated locking slot assembly |
| 08/27/2008 | CN201106432Y Wear prevention sleeve of casing head as well as special sending, taking-up tool |
| 08/27/2008 | CN201106428Y Hydraulic machinery double-acting intumescence type tailpiece hanger |
| 08/27/2008 | CN201106427Y Rotatable hydraulic machinery double-acting intumescence type tailpiece hanger |
| 08/27/2008 | CN201106426Y Rotatable hydraulic machinery double-acting intumescence type tailpiece hanger |
| 08/27/2008 | CN201106425Y Hydraulic machinery double-acting intumescence type tailpiece hanger |
| 08/27/2008 | CN201106424Y Machine for rapidly feeding eenter pipe rubber plug |
| 08/27/2008 | CN101250980A Self-aligning open-hole tractor |
| 08/27/2008 | CA2622052A1 Subterranean well tool including a locking seal healing system |
| 08/26/2008 | US7416029 Downhole tool |
| 08/26/2008 | US7416028 Telemetry system for the bi-directional communication of data between a well point and a terminal unit situated on the surface |
| 08/26/2008 | US7416027 Adjustable expansion cone assembly |
| 08/26/2008 | CA2507732C Methods of completing a subterranean well and associated apparatus |
| 08/26/2008 | CA2490455C Reciprocating slickline pump |
| 08/26/2008 | CA2470435C A pressure control system for a wet connect/disconnect hydraulic control line connector |
| 08/26/2008 | CA2330870C Subterranean well tool and slip assembly |
| 08/26/2008 | CA2259569C Downhole tool and method |