| 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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| 11/11/1997 | US5685373 Assembly and process for drilling and completing multiple wells |
| 11/11/1997 | US5685372 Temporary plug system |
| 11/11/1997 | US5685370 Dual-bore, antirotating pump assembly |
| 11/06/1997 | WO1997041333A1 Method and apparatus for remote control of multilateral wells |
| 11/06/1997 | WO1997041331A1 Selective mono bore diverter system |
| 11/06/1997 | CA2226148A1 Selective mono bore diverter system |
| 11/05/1997 | EP0805259A2 Retrievable screen apparatus and methods of using the apparatus |
| 10/28/1997 | US5680901 Radial tie back assembly for directional drilling |
| 10/25/1997 | CA2201554A1 Tree test plug |
| 10/23/1997 | WO1997039273A1 Method and equipment for launching pigs into undersea pipes |
| 10/23/1997 | WO1997039219A1 Apparatus and method for downhole drilling communications |
| 10/23/1997 | CA2252400A1 Apparatus and method for downhole drilling communications |
| 10/22/1997 | EP0802304A1 Circulating valve |
| 10/22/1997 | EP0802303A1 Sealing apparatus |
| 10/22/1997 | EP0801703A1 Apparatus for deploying wireline |
| 10/21/1997 | US5680049 Apparatus for measuring formation resistivity through a conductive casing having a coaxial tubing inserted therein |
| 10/21/1997 | US5678635 Thru tubing bridge plug and method |
| 10/21/1997 | US5678634 Method and apparatus for retrieving a whipstock |
| 10/21/1997 | US5678633 Shifting tool |
| 10/18/1997 | CA2202726A1 Circulating valve responsive to fluid flow rate therethrough and associated methods of servicing a well |
| 10/17/1997 | CA2202729A1 Sintered metal seal |
| 10/14/1997 | CA2163946C Dizzy dognut anchoring system |
| 10/09/1997 | WO1997037101A1 Monobore riser bore selector |
| 10/09/1997 | CA2185718A1 Multi-purpose drilling tool |
| 10/08/1997 | EP0799969A2 Process and device for pulling pipes or cables in a pilot hole |
| 10/07/1997 | US5673765 Downhole drilling subassembly and method for same |
| 10/07/1997 | US5673764 Drill string orienting motor |
| 10/04/1997 | CA2201823A1 Method and apparatus for sinking the pipes or cables into a pilot borehole |
| 10/02/1997 | WO1997036089A1 Hydraulic sliding side-door sleeve |
| 10/02/1997 | WO1997036088A1 Actuating ball |
| 09/30/1997 | US5671813 Method and apparatus for intermittent production of oil with a mechanical interface |
| 09/25/1997 | WO1997035094A1 Well pumping system and installation method |
| 09/25/1997 | CA2200132A1 Monobore completion/intervention riser system |
| 09/24/1997 | EP0796980A2 Zonal isolation methods and apparatus |
| 09/24/1997 | EP0577845B1 Device for positioning member and excavating direction control device for excavator employing said device |
| 09/23/1997 | US5669457 Drill string orienting tool |
| 09/16/1997 | US5667023 Method and apparatus for drilling and completing wells |
| 09/16/1997 | US5667016 Method of setting and releasing a packer downhole |
| 09/10/1997 | EP0794316A2 Packer for use in a subterranean well |
| 09/07/1997 | CA2199192A1 Downhole disconnect tool |
| 09/07/1997 | CA2196933A1 Multipurpose tool |
| 09/03/1997 | EP0792997A2 Method and apparatus for controlling tool access to a lateral wellbore |
| 09/03/1997 | CN2261519Y Input hydraulic piston pump |
| 09/02/1997 | US5662182 System for in situ replacement of cutting means for a ground drill |
| 09/02/1997 | US5662170 Method of drilling and completing wells |
| 09/02/1997 | US5662165 Production wells having permanent downhole formation evaluation sensors |
| 08/28/1997 | WO1997020130A3 Downhole apparatus and method for expanding a tubing |
| 08/28/1997 | WO1997019248A3 Downhole equipment |
| 08/27/1997 | EP0760049B1 Whipstock and method for setting such a whipstock |
| 08/26/1997 | CA2114307C Environmentally secure polished rod liner head |
| 08/21/1997 | WO1997030269A1 Motor drive actuator for downhole flow control devices |
| 08/21/1997 | WO1997030262A1 An orientation device, particularly for a drilling tool or a well equipment |
| 08/20/1997 | EP0790388A2 Device to prevent fluid loss |
| 08/20/1997 | EP0550569B1 Valve control apparatus |
| 08/14/1997 | WO1997029270A1 Hydraulically releasable coupling |
| 08/14/1997 | CA2245947A1 Hydraulically releasable coupling |
| 08/13/1997 | CA2197404A1 Fluid loss device |
| 08/12/1997 | US5655606 For supporting a string of casing in a well |
| 08/12/1997 | US5655602 Apparatus and process for drilling and completing multiple wells |
| 08/07/1997 | WO1997028349A2 Downhole valve |
| 08/07/1997 | CA2245075A1 Improved downhole apparatus |
| 08/06/1997 | EP0787888A2 Circulating sub |
| 08/06/1997 | EP0677135A4 Method and apparatus for setting a whipstock. |
| 07/31/1997 | WO1997027382A1 Completions insertion and retrieval under pressure (cirp) apparatus including the snaplock connector |
| 07/29/1997 | US5651415 System for selective re-entry to completed laterals |
| 07/23/1997 | CA2194417A1 Running liners with coiled tubing |
| 07/22/1997 | US5649603 Downhole tools having circumferentially spaced rolling elements |
| 07/17/1997 | WO1997025518A2 Apparatus for setting a liner in a well casing |
| 07/17/1997 | WO1997025515A1 Release mechanism |
| 07/17/1997 | CA2242307A1 Release mechanism |
| 07/15/1997 | US5648555 Unsaturated ethers with adamantane groups for detectable compounds by fluorescence |
| 07/15/1997 | US5647437 Thru tubing tool and method |
| 07/10/1997 | WO1997024508A1 Drill string orienting tool |
| 07/02/1997 | EP0781369A2 Apparatus for milling a well casing |
| 07/01/1997 | US5642964 In-ground conduit system for geothermal applications |
| 06/26/1997 | WO1997022781A1 Improved measurement port coupler and probe interface |
| 06/26/1997 | WO1997013954A3 Mill for wellbore milling operations |
| 06/25/1997 | CN2256930Y Safety clamp for changing packing fittings |
| 06/24/1997 | CA2108914C Formation testing apparatus and method |
| 06/17/1997 | US5639184 In-ground conduit system for geothermal applications |
| 06/17/1997 | US5638904 Within wells |
| 06/12/1997 | WO1997021077A1 Differential pressure measurement systems for fluid streams |
| 06/12/1997 | WO1997021020A1 Down hole bypass valve |
| 06/12/1997 | CA2242103A1 Differential pressure measurement systems for fluid streams |
| 06/10/1997 | US5637747 Synthesis of 1,2-dioxetanes and intermediates therefor |
| 06/10/1997 | US5636694 Hydraulic power stroker for shifting of sliding sleeves |
| 06/10/1997 | US5636690 Torque anchor |
| 06/10/1997 | US5636689 Release/anti-preset mechanism for down-hole tools |
| 06/10/1997 | CA2139067C Wireline-set tubing-release packer apparatus |
| 06/10/1997 | CA2010534C Wire line core drilling apparatus |
| 06/05/1997 | WO1997020130A2 Downhole apparatus and method for expanding a tubing |
| 06/04/1997 | EP0777033A2 Side pocket mandrel for gas lift wells and method for its manufacturing |
| 06/04/1997 | EP0656985B1 Drill string anchor |
| 06/03/1997 | CA2119810C Emergency downhole disconnect tool |
| 05/29/1997 | WO1997019249A1 A sleeve for orientating a tool |
| 05/29/1997 | WO1997019248A2 Downhole equipment |
| 05/28/1997 | EP0775804A2 Completely removable bidirectional plug |
| 05/28/1997 | EP0775803A2 Linear indexing apparatus and methods of using same |
| 05/28/1997 | EP0775802A2 Method and apparatus for directional drilling |
| 05/23/1997 | CA2190899A1 Apparatus and method for temporary subsurface well sealing and equipment anchoring |