| 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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| 05/22/1997 | WO1997018382A1 Spear head assembly |
| 05/22/1997 | WO1997018381A1 Side pocket mandrel |
| 05/22/1997 | CA2236932A1 Spear head assembly |
| 05/22/1997 | CA2233020A1 Side pocket mandrel |
| 05/21/1997 | EP0774565A2 Downhole arrangement for acquiring well information |
| 05/21/1997 | EP0774563A2 Method and apparatus for navigational drilling |
| 05/14/1997 | EP0773344A1 Device for exploring a downhole formation traversed by a horizontal borehole with several anchorable probes |
| 05/14/1997 | EP0772728A1 Locomotive or tractor for pulling equipment in a pipe or drill hole |
| 05/14/1997 | EP0772725A1 Method and apparatus of installing a whipstock |
| 05/10/1997 | CA2189085A1 Completion apparatus and method |
| 05/09/1997 | WO1997009510A3 Tubing anchor and force generator combined wich such an anchor |
| 05/09/1997 | CA2188175A1 Tubing tightener |
| 05/01/1997 | WO1997015747A1 Assembly and process for drilling and completing multiple wells |
| 05/01/1997 | CA2188716A1 Downhole oil well tool running and pulling with hydraulic release using deformable ball valving member |
| 04/29/1997 | US5623991 Tubing tightener |
| 04/29/1997 | CA2147743C Wellbore anchor |
| 04/24/1997 | WO1997014869A1 Method and apparatus for improved communication in a wellbore utilizing acoustic signals |
| 04/23/1997 | EP0769092A1 Hydraulic shifting tool for sliding sleeves |
| 04/23/1997 | CN2252880Y Screw pump anchoring appts. |
| 04/18/1997 | CA2186657A1 Method and apparatus for retrieving a whipstock |
| 04/17/1997 | WO1997013954A2 Mill for wellbore milling operations |
| 04/17/1997 | WO1997005759A3 Improved downhole apparatus |
| 04/16/1997 | CN1034599C Crawling device |
| 04/15/1997 | US5620050 Method for setting hydraulic packers that enable placement of gravel pack in a downhole oil and gas well |
| 04/08/1997 | US5617926 Steerable drilling tool and system |
| 04/08/1997 | US5617918 Wellbore lock system and method of use |
| 04/03/1997 | WO1997012166A1 Composite spoolable tube |
| 04/03/1997 | WO1997012117A1 System for selective re-entry to completed laterals |
| 04/03/1997 | WO1997012113A1 Method and apparatus for selective horizontal well re-entry using retrievable diverter oriented by logging means |
| 04/03/1997 | WO1997012112A1 Method for isolating multi-lateral well completions while maintaining selective drainhole re-entry access |
| 04/03/1997 | CA2687548A1 Composite spoolable tube |
| 03/30/1997 | CA2186770A1 Apparatus for measuring pressure |
| 03/29/1997 | CA2186173A1 Pressure-actuated valve and method |
| 03/26/1997 | CN2250418Y Automatic resetting small slide cart |
| 03/25/1997 | US5613567 Process for completing a well |
| 03/25/1997 | US5613560 Wireline set, tubing retrievable well packer with flow control device at the top |
| 03/25/1997 | US5613559 Decentralizing centralizing locating and orienting subsystems and methods for subterranean multilateral well drilling and completion |
| 03/25/1997 | US5613557 Apparatus and method for sealing perforated well casing |
| 03/20/1997 | WO1997010480A1 Apparatus and method for installing a pipe in a wellbore |
| 03/20/1997 | DE19534696A1 Introducing measuring instruments into horizontal or sloping borehole |
| 03/19/1997 | EP0763647A2 Steerable drilling tool and system |
| 03/19/1997 | EP0763161A1 Method for setting a whipstock in a wellbore |
| 03/19/1997 | EP0624225B1 Multi-arm stabilizer for a drilling or boring device |
| 03/18/1997 | US5611401 One-trip conveying method for packer/plug and perforating gun |
| 03/18/1997 | CA2061571C Hydraulic system for electronically controlled downhole testing tool |
| 03/13/1997 | WO1997009510A2 Tubing anchor and force generator combined wich such an anchor |
| 03/12/1997 | CA2185067A1 Production wells having permanent downhole formation evaluation sensors |
| 03/11/1997 | US5609178 Pressure-actuated valve and method |
| 03/11/1997 | CA2101982C Selective downhole operating system and method |
| 03/06/1997 | WO1997008426A1 Locking system |
| 03/06/1997 | WO1997008425A1 Self-centering system for a tool travelling through a tubular member |
| 03/06/1997 | WO1997008418A1 Puller-thruster downhole tool |
| 03/06/1997 | WO1997008417A1 Tool for transporting cutting means to and from a ground drill |
| 03/06/1997 | WO1997008379A1 Retraction system for a latching mechanism of a tool |
| 03/06/1997 | CA2230573A1 Locking system |
| 03/06/1997 | CA2230569A1 Tool for transporting cutting means to and from a ground drill |
| 03/06/1997 | CA2230568A1 Retraction system for a latching mechanism of a tool |
| 03/05/1997 | EP0760417A2 Method of and apparatus for assembling a tool string |
| 03/05/1997 | EP0760049A1 Whipstock and method for setting such a whipstock |
| 03/05/1997 | EP0604568B1 Downhole activated system for perforating a wellbore |
| 02/25/1997 | CA2101815C Equipment for the interconnection of two lines to allow running of pigs |
| 02/20/1997 | WO1997006346A1 Inflatable tubular sleeve for tubing or obturating a well or a pipe |
| 02/20/1997 | WO1997006345A1 Device and process for the lining of a pipe branch, particularly in an oil well |
| 02/20/1997 | WO1997006344A1 Downhole apparatus |
| 02/20/1997 | WO1997005759A2 Improved downhole apparatus |
| 02/20/1997 | WO1996038649A3 Activating means for a down-hole tool |
| 02/20/1997 | CA2228840A1 Downhole apparatus |
| 02/19/1997 | CA2183505A1 Method of and apparatus for assembling a tool string |
| 02/13/1997 | WO1997005361A1 Safeguarded method and apparatus for fluid communication using coiled tubing, with application to drill stem testing |
| 02/13/1997 | WO1997005360A1 Apparatus and process for drilling and completing multiple wells |
| 02/13/1997 | WO1996034176A3 Hydraulic shifting tool for sliding sleeves |
| 02/06/1997 | WO1996027732A3 Shifting tool, releasing mechanism, position feedback method and method of releasing |
| 02/04/1997 | CA2168651C Improved slick line system with real-time surface display |
| 01/30/1997 | WO1997003274A1 Single trip whipstock assembly |
| 01/29/1997 | EP0567460A4 Well tool and method of use |
| 01/28/1997 | US5597042 Method for controlling production wells having permanent downhole formation evaluation sensors |
| 01/28/1997 | US5597016 Mechanical lockout for pressure responsive downhole tool |
| 01/28/1997 | CA2138201C Propulsion seal for wire line core drilling apparatus |
| 01/28/1997 | CA2040281C Wireline supported perforating gun enabling oriented perforations |
| 01/21/1997 | US5595247 Retrievable through tubing tool and method |
| 01/15/1997 | EP0753648A2 Packer type groundwater sampling system and water sampling method |
| 01/14/1997 | US5592994 Propulsion seal for wire line core drilling apparatus |
| 01/14/1997 | US5592991 Method and apparatus of installing a whipstock |
| 01/07/1997 | US5590715 Underground heat exchange system |
| 01/07/1997 | CA2091448C Well orienting tool and method of use |
| 01/02/1997 | EP0750716A1 Milling tool |
| 01/01/1997 | CN2244088Y Timed off-clamping device |
| 01/01/1997 | CN2244087Y Movable braking link lever for oil pumping machine well |
| 12/24/1996 | US5586601 Mechanism for anchoring well tool |
| 12/18/1996 | CN2242975Y Butt-bucklling reverse-buckling device for sucker rod |
| 12/17/1996 | US5585555 Borehole strainmeter |
| 12/17/1996 | US5584488 Seal |
| 12/17/1996 | US5584342 Subterranean rotation-inducing device and method |
| 12/16/1996 | CA2151906A1 Well completion tool and process |
| 12/12/1996 | WO1996039570A1 Subterranean rotation-inducing device and method |
| 12/11/1996 | EP0747570A1 Mid pulse valve for measurement-while-drilling system |
| 12/11/1996 | EP0746664A1 Whipstock apparatus and methods of use |
| 12/10/1996 | US5582260 Control of at least two stabilizing arms in a drill or core device |
| 12/10/1996 | US5582253 Debris barrier with a downhole tool setting assembly |
| 12/10/1996 | CA2127013C Coiled tubing wireline retrievable and selective gas lift assembly |