| Patents for E21B 23 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells (12,712) |
|---|
| 03/29/1994 | US5297634 Method and apparatus for reducing wellbore-fluid pressure differential forces on a settable wellbore tool in a flowing well |
| 03/29/1994 | US5297633 For use in an enclosure |
| 03/29/1994 | CA2022195C Hydraulically operated permanent type well packer assembly |
| 03/23/1994 | EP0424452B1 Plug for well logging operations |
| 03/23/1994 | CN2159452Y Automatically-aligning hanging apparatus for cartridge container |
| 03/22/1994 | US5295538 Sintered screen completion |
| 03/17/1994 | WO1994005895A1 Hydraulic release apparatus and method |
| 03/17/1994 | WO1994005891A1 Drill string anchor |
| 03/15/1994 | US5294923 Method and apparatus for relaying downhole data to the surface |
| 03/15/1994 | US5293945 For use in a well bore |
| 03/15/1994 | US5293940 Automatic tubing release |
| 03/09/1994 | CN2158444Y Apparatus for mounting or dismounting section of piston pump in well of oil-field |
| 03/02/1994 | EP0584997A2 Downhole tool operating system and method |
| 02/23/1994 | EP0583913A1 Equipment for the interconnection of two lines to allow running of pigs |
| 02/23/1994 | EP0583912A1 Equipment for the interconnection of two lines to allow running of pigs |
| 02/22/1994 | US5287922 Emergency method for running slips over casing collars |
| 02/22/1994 | US5287921 Method and apparatus for setting a whipstock |
| 02/22/1994 | US5287920 Large head downhole chemical cutting tool |
| 02/22/1994 | CA2024081C Method and apparatus for logging short radius horizontal drainholes |
| 02/17/1994 | WO1994003705A1 Sintered screen completion |
| 02/17/1994 | WO1994003704A1 Gravel packing system |
| 02/17/1994 | WO1994003698A1 Method and apparatus for locating and re-entering one or more horizontal wells using whipstocks |
| 02/15/1994 | US5285850 Well completion system for oil and gas wells |
| 02/15/1994 | CA1327036C System and method for providing multiple wells from a single wellbore |
| 02/09/1994 | EP0582118A1 Ground probe, distance piece and one-piece pile for ground probe, geothermal plant and method of manufacturing a geothermal plant |
| 02/08/1994 | US5284208 Production logging system using through flow line tools |
| 02/01/1994 | CA1326630C Deployment/retrieval method and apparatus for well logging tools used with coiled tubing |
| 02/01/1994 | CA1326600C Method of pipe replacement |
| 01/26/1994 | CN2154343Y Planetary claw double-way clamping sturture of power pliers |
| 01/19/1994 | EP0578681A1 Retrievable bridge plug and a running tool therefor. |
| 01/18/1994 | CA1326206C Method and means for taking measures and/or undertaking works in a well subjected to hydraulic compression |
| 01/12/1994 | EP0577845A1 Device for positioning member and excavating direction control device for excavator employing said device |
| 01/11/1994 | US5278550 For use in association with a subsurface apparatus |
| 01/06/1994 | WO1994000670A1 Survey process for cable core borings and device for implementing it |
| 01/04/1994 | US5275242 Repositioned running method for well tubulars |
| 01/04/1994 | US5275239 Anchoring device for tubing string |
| 01/04/1994 | US5275238 For use in a fluid production line |
| 12/28/1993 | US5273116 Firing mechanism for actuating wellbore tools |
| 12/28/1993 | US5273109 Retrievable packer |
| 12/22/1993 | EP0575114A1 Large head downhole chemical cutting tool |
| 12/21/1993 | US5271462 Zone isolation apparatus |
| 12/21/1993 | US5271461 Coiled tubing deployed inflatable stimulation tool |
| 12/16/1993 | DE4225806C1 Drilling bit mounting for boring large holes - has clamp within drilling tube with radial expansion against eccentric type carrier |
| 12/15/1993 | EP0574246A1 Lock member for a flow control equipment in wells |
| 12/09/1993 | WO1993024728A1 Downhole tools |
| 12/09/1993 | WO1993024727A1 Tubing anchor catcher with rotating mandrel |
| 12/08/1993 | CN2148820Y Safety inverted buckling tong hold for oil extraction pump rod |
| 12/07/1993 | US5267620 Drilling latch apparatus |
| 12/07/1993 | US5267617 Downhole tools with inflatable packers and method of operating the same |
| 11/30/1993 | US5265684 Downhole adjustable stabilizer and method |
| 11/30/1993 | US5265679 In a wellbore tool string |
| 11/24/1993 | EP0571045A1 Directional drilling with downhole motor on coiled tubing |
| 11/23/1993 | CA1324572C Drilling rig and its multiple direction anchoring device to a well |
| 11/16/1993 | US5261492 Well casing apparatus and method |
| 11/16/1993 | US5261488 Centralizers for oil well casings |
| 11/09/1993 | US5259467 Directional drilling tool |
| 11/09/1993 | US5259452 System for sensing acoustic waves in wells, allowing the mechanical uncoupling of the sensors |
| 11/03/1993 | EP0567460A1 Well tool and method of use |
| 10/27/1993 | CN2144706Y Threaded rod oil pump vertical wellhead assembly |
| 10/19/1993 | US5253706 Release mechanism |
| 10/19/1993 | US5253705 Hostile environment packer system |
| 10/19/1993 | CA1323408C Signal reception system coupled to a well wall or a drilling hole wall |
| 10/14/1993 | WO1993020329A1 Hydraulically actuated liner hanger arrangement and method |
| 10/12/1993 | US5251703 Hydraulic system for electronically controlled downhole testing tool |
| 10/10/1993 | CA2071326A1 Directional drilling tool |
| 10/05/1993 | US5249625 Soft set overshot fishing tool |
| 09/16/1993 | WO1993018277A1 A tractor for advancing processing and measuring equipment in a borehole |
| 09/15/1993 | EP0559735A1 Plugs for well logging operations. |
| 09/14/1993 | US5244046 Coiled tubing drilling and service unit and method for oil and gas wells |
| 09/14/1993 | US5244044 Catcher sub |
| 09/08/1993 | EP0559565A1 Electrically controlled latch for well applications |
| 09/07/1993 | US5242201 Fishing tool |
| 09/07/1993 | US5242020 Method for deploying extendable arm for formation evaluation MWD tool |
| 09/05/1993 | CA2089684A1 Landing nipples |
| 09/02/1993 | WO1993016833A1 Broaching tool for tubing |
| 09/01/1993 | EP0558379A1 System and method for physical data acquisition during drilling |
| 08/31/1993 | US5240077 Voltage controlled hydraulic setting tool |
| 08/31/1993 | US5240076 Casing tension retainer |
| 08/24/1993 | US5238070 Differential actuating system for downhole tools |
| 08/17/1993 | US5236048 Apparatus and method for communicating electrical signals in a well, including electrical coupling for electric circuits therein |
| 08/17/1993 | CA2015711C Rotatable liner hanger with multiple bearings and cones |
| 08/11/1993 | CN2139985Y Pneumatic square drill rod rotary tightening unit |
| 08/10/1993 | US5234058 Composite rod-stiffened spoolable cable with conductors |
| 08/05/1993 | WO1993015306A1 A subsurface well tool actuator |
| 08/05/1993 | WO1993015301A1 Whipstock for oil and gas wells |
| 08/05/1993 | WO1993015300A1 Device for positioning member and excavating direction control device for excavator employing said device |
| 08/05/1993 | CA2126553A1 Whipstock for oil and gas wells |
| 08/04/1993 | EP0553732A1 Method and apparatus for relaying downhole data to the surface |
| 08/01/1993 | CA2088452A1 Method and apparatus for relaying downhole data to the surface |
| 07/21/1993 | EP0552087A2 Apparatus and method for retrieving and/or communicating with downhole equipment |
| 07/20/1993 | US5228519 Method and apparatus for extending pressurization of fluid-actuated wellbore tools |
| 07/20/1993 | US5228518 Downhole activated process and apparatus for centralizing pipe in a wellbore |
| 07/20/1993 | US5228516 Tester valve |
| 07/20/1993 | US5228507 Wireline hydraulic retrieving tool |
| 07/14/1993 | CN2138187Y Multifunctional heat insulating tube cleaning tool |
| 07/13/1993 | US5226494 Subsurface well apparatus |
| 07/13/1993 | US5226483 Safety valve landing nipple and method |
| 07/13/1993 | CA1320125C Process and apparatus for handling/steering at least one device within a well casing |
| 07/08/1993 | WO1993013293A1 Inflatable packer assembly |
| 07/07/1993 | CN2137709Y Cliping device for cable in oil well |