Patents for E21B 41 - Equipment or details not covered by groups (7,984) |
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04/22/1998 | EP0837218A2 Method for supplying power to measure and/or control devices of drilling machines and a drilling machine |
04/22/1998 | EP0836751A1 Thermoelectric generator |
04/22/1998 | CN1179499A Regulator for overflow direction of oil-and water-wells |
04/16/1998 | WO1998015850A1 Method of obtaining improved geophysical information about earth formations |
04/15/1998 | CN1179196A Oil and gas field chemicals |
04/09/1998 | WO1998014363A1 Apparatus for offshore production of hydrocarbon fluids |
04/07/1998 | US5735350 Methods and systems for subterranean multilateral well drilling and completion |
04/02/1998 | WO1998013578A1 Method of installing tubing into a lateral borehole |
04/02/1998 | CA2266928A1 Method of installing tubing into a lateral borehole |
03/31/1998 | US5734988 Method and apparatus for the injection disposal of solid and liquid waste materials into subpressured earth formations penetrated by a borehole |
03/31/1998 | US5732776 Downhole production well control system and method |
03/26/1998 | WO1998012418A2 Autonomous downhole oilfield tool |
03/25/1998 | EP0830550A1 System for geothermal production of electricity |
03/24/1998 | US5730224 Slidable access control device for subterranean lateral well drilling and completion |
03/17/1998 | US5727741 Pulverizing assembly |
03/10/1998 | US5725425 Sensor system for controlling ventilation systems in vehicles |
03/10/1998 | US5725021 System for retrieving waste drilling mud |
03/05/1998 | WO1998009163A1 Method for verifying positive inflation of an inflatable element |
03/05/1998 | WO1998009054A1 Cement reinforced inflatable seal for a junction of a multilateral |
03/05/1998 | WO1998009053A2 Method and apparatus for sealing a junction on a multilateral well |
03/05/1998 | WO1998009049A1 Method and apparatus to seal a junction between a lateral and a main wellbore |
03/05/1998 | WO1998009048A1 Re-entry tool for use in a multilateral well |
02/26/1998 | WO1996041104A3 System for geothermal production of electricity |
02/25/1998 | EP0825329A2 Drilling apparatus with a feed control device |
02/25/1998 | EP0825327A2 Apparatus for completing a subterranean well and method of using same |
02/24/1998 | US5721538 System and method of communicating between a plurality of completed zones in one or more production wells |
02/19/1998 | WO1998006925A2 Dual annulus production tool |
02/11/1998 | EP0823534A1 Apparatus for establishing branch wells from a parent well |
02/10/1998 | US5715891 Method for isolating multi-lateral well completions while maintaining selective drainhole re-entry access |
02/04/1998 | CN2273768Y Bore tube drawer |
01/29/1998 | WO1997041330A3 Multi-lateral wellbore system and method for forming same |
01/22/1998 | WO1998002638A1 Apparatus and method for performing imaging and downhole operations at work site in wellbores |
01/21/1998 | EP0819829A2 Apparatus for completing a subterranean well and method of using same |
01/21/1998 | EP0819828A2 Apparatus for completing a subterranean well and method of using same |
01/21/1998 | EP0819823A2 Apparatus for completing a subterranean well and method of using same |
01/15/1998 | CA2209958A1 Apparatus for completing a subterranean well and associated methods of using same |
01/13/1998 | US5706896 Method and apparatus for the remote control and monitoring of production wells |
01/13/1998 | US5706892 Downhole tools for production well control |
01/08/1998 | DE19708140A1 Well regeneration appliance |
01/08/1998 | DE19626590A1 Water jet cleaning system for use in deep well bores |
01/07/1998 | EP0815349A1 Hydrocarbon production using multilateral well bores |
01/07/1998 | CA2209960A1 Well regeneration apparatus and method of regenerating wells |
12/30/1997 | CA2070789C Hydraulic embedment of waste in subterranean formations |
12/18/1997 | WO1997047854A1 Device for giving out doses of a fluid |
12/16/1997 | US5697445 Method and apparatus for selective horizontal well re-entry using retrievable diverter oriented by logging means |
12/16/1997 | US5697218 System for geothermal production of electricity |
12/10/1997 | EP0811110A1 Oil well treatment |
12/09/1997 | US5695015 System and method of controlling rotation of a downhole instrument package |
12/09/1997 | CA2058315C Tool saver |
12/04/1997 | WO1997045623A1 System and method for placement and retrieval of a subsurface diverting tool used in drilling and completing wells |
12/04/1997 | WO1997045507A1 Fuel additives |
11/25/1997 | US5690811 Method for extracting oil from oil-contaminated soil |
11/25/1997 | US5690174 Antiscale |
11/19/1997 | EP0807201A1 Multiple drain drilling and production apparatus |
11/19/1997 | CN1165563A Method for obtaining a representation of the texture of a geological structure |
11/12/1997 | EP0806542A2 Steerable rotary drilling system |
11/11/1997 | US5685374 Well completions in weakly consolidated formations |
11/06/1997 | WO1997041331A1 Selective mono bore diverter system |
11/06/1997 | WO1997041330A2 Multi-lateral wellbore system and method for forming same |
11/06/1997 | WO1997041310A1 Precast prerotation basin system |
11/06/1997 | CA2226148A1 Selective mono bore diverter system |
11/05/1997 | EP0804665A1 Telescopic flare pipe tower |
11/05/1997 | CN2266652Y 可调式泄油器 Adjustable bleeder |
10/28/1997 | US5680901 Radial tie back assembly for directional drilling |
10/16/1997 | WO1997038451A1 Thermoelectric generator |
10/15/1997 | EP0801207A2 Drilling tool with marking element |
10/15/1997 | EP0800611A1 Oil and gas field chemicals |
10/02/1997 | WO1997036084A1 Method of assaying downhole occurrences and conditions |
09/30/1997 | US5671811 Tube assembly for servicing a well head and having an inner coil tubing injected into an outer coiled tubing |
09/24/1997 | EP0796443A1 Method for obtaining a representation of the textures of a geological structure |
09/17/1997 | EP0795679A2 Method and apparatus for establishing branch wells at a node of a parent well |
09/17/1997 | EP0795091A1 A mechanical overload protection device |
09/16/1997 | US5667341 Apparatus for signal and data transmission for controlling and monitoring underwater pile drivers, cut-off equipment and similar work units |
09/16/1997 | US5667013 Method and apparatus for supporting casing string from mobile offshore platform |
09/09/1997 | US5665221 Electrical apparatus for controlling liquid contaminants |
09/03/1997 | EP0792997A2 Method and apparatus for controlling tool access to a lateral wellbore |
09/02/1997 | US5662807 Apparatus and method for handling waste |
09/02/1997 | US5662169 Cuttings injection wellhead system |
09/02/1997 | US5661977 System for capturing geothermal heat using electrolytic reactions |
08/28/1997 | WO1997031175A1 Moling apparatus and a ground sensing system therefor |
08/28/1997 | CA2251688A1 Moling apparatus and a ground sensing system therefor |
08/20/1997 | EP0507925B1 Hydraulic embedment of waste in subterranean formations |
08/12/1997 | CA2060348C Pressure equalizer for use at deep sea |
08/06/1997 | EP0787936A1 Interface system for connecting a remote-operated vehicle to subsea pipeline support |
07/30/1997 | EP0786578A2 Flow segregator for multi-drain well completion |
07/29/1997 | US5651415 System for selective re-entry to completed laterals |
07/22/1997 | US5649595 Milling method for liners extending into deviated wellbores |
07/22/1997 | CA2028102C Undersea package and installation system |
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 |
07/08/1997 | US5645377 For use in creating a lined injection hole through material |
07/03/1997 | WO1997023708A1 Wellhead apparatus |
07/01/1997 | US5642965 Interface system for operation of remote control vehicle |
06/19/1997 | WO1997021900A1 Fluid drilling system |
06/19/1997 | DE19547274A1 Arrangement for disposal of e.g. wastes from oil and nuclear industries |
06/10/1997 | US5637795 Apparatus and test methodology for measurement of bit/stabilizer balling phenomenon in the laboratory |
05/28/1997 | EP0775802A2 Method and apparatus for directional drilling |
05/15/1997 | WO1997017522A1 Portable flare tank for degassing of drilling fluid |
05/06/1997 | US5626200 For use in a wellbore |