Patents
Patents for E21B 29 - Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground (5,744)
07/1985
07/02/1985US4526232 Method of replacing a corroded well conductor in an offshore platform
06/1985
06/19/1985EP0145456A2 Shearing type blowout preventer
06/18/1985US4524324 Downhole instrument including a flexible probe which can travel freely around bends in a borehole
06/18/1985US4523639 Ram type blowout preventers
05/1985
05/28/1985US4519577 Flow controlling apparatus
05/28/1985US4519575 Valves and valve actuators
05/14/1985US4516598 Well safety valve
04/1985
04/23/1985US4512411 Fluid actuated energy charged well service line cutter
04/16/1985US4511002 Oil well tubing head system
04/02/1985US4508313 Valves
03/1985
03/19/1985CA1184039A2 Methods, apparatus and pyrotechnic compositions for severing conduits
03/12/1985CA1183772A1 Self powered downhole tool anchor
02/1985
02/26/1985US4501327 Split casing block-off for gas or water in oil drilling
02/12/1985US4498543 Method for placing a liner in a pressurized well
01/1985
01/29/1985CA1181679A1 Casing perforation method and apparatus
01/22/1985US4494601 Downhole chemical cutting tool
11/1984
11/20/1984US4483399 Method of deep drilling
11/14/1984EP0124601A1 Safety valve apparatus and method
10/1984
10/16/1984US4476935 Safety valve apparatus and method
10/02/1984CA1175344A1 Downhole chemical cutting tool
06/1984
06/05/1984CA1168573A1 Well casing cutter
05/1984
05/29/1984US4450857 Device for tapping and plugging a fluid conductor
05/15/1984CA1167370A1 Methods, apparatus and pyrotechnic compositions for severing conduits
05/10/1984WO1984001799A1 Safety valve apparatus and method
05/08/1984US4446920 Method and apparatus for perforating or cutting with a solid fueled gas mixture
04/1984
04/17/1984US4442896 Treatment of underground beds
04/17/1984US4442891 Cutters
03/1984
03/13/1984US4436154 Method for controlling subsurface blowout
02/1984
02/07/1984US4429741 Self powered downhole tool anchor
01/1984
01/31/1984US4428430 Method for increasing fluid flow circulation
01/24/1984US4427059 Wire line cutter apparatus
01/03/1984US4424086 Pyrotechnic compositions for severing conduits
12/1983
12/13/1983US4420042 Method for cutting and replacing tubing without killing well
11/1983
11/29/1983US4417625 Annulus plugging
11/15/1983US4415029 Downhole well tool and anchoring assembly
08/1983
08/17/1983EP0085989A2 Downhole instrument and methods of manufacturing and using the same
08/09/1983US4397355 Whipstock setting method and apparatus
08/09/1983CA1151731A1 Apparatus and method for casing inspection
06/1983
06/28/1983US4389765 Piling removal
06/28/1983CA1148852A1 Chemical cutting apparatus
05/1983
05/31/1983CA1147255A1 Hydra-jet slotting tool
05/10/1983CA1146065A1 Methods and apparatus for severing conduits
04/1983
04/05/1983US4378844 Explosive cutting system
02/1983
02/08/1983US4372333 Valve actuating apparatus and method
02/01/1983CA1140454A1 Wellhead shearing apparatus
01/1983
01/25/1983US4369845 Oil well blow-out control
11/1982
11/30/1982CA1136544A1 Blowout preventer shearing and sealing rams
10/1982
10/19/1982US4354433 Apparatus for cutting pipe
10/05/1982US4352397 Methods, apparatus and pyrotechnic compositions for severing conduits
09/1982
09/22/1982EP0060715A1 Pipe sealing apparatus and jack
09/07/1982US4347898 Shear ram blowout preventer
08/1982
08/31/1982US4346761 Hydra-jet slotting tool
08/24/1982US4345646 Apparatus for chemical cutting
07/1982
07/27/1982US4341264 Wellhead shearing apparatus
07/14/1982EP0055760A1 Method of converting a cable in the ground into a closed guiding track for insertion of new conductors.
07/13/1982US4339008 Well notching tool
07/13/1982US4339000 Method and apparatus for a bridge plug anchor assembly for a subsurface well
04/1982
04/13/1982CA1121721A1 Device for perforating water well pipe casings
04/06/1982US4323117 Method and means for emergency shearing and sealing of well casing
03/1982
03/16/1982US4319393 Methods of forming swages for joining two small tubes
02/1982
02/16/1982US4315797 Chemical pipe cutter with exponential spacing between reactant stages
02/04/1982WO1982000388A1 Method of converting a cable in the ground into a closed guiding track for insertion of new conductors
02/02/1982US4313496 Wellhead shearing apparatus
01/1982
01/12/1982US4309891 Double action, self-contained swages for joining two small tubes
01/12/1982CA1116073A1 Methods and apparatus for severing conduits
12/1981
12/22/1981US4306622 Apparatus and method for down-hole retrieval of pumping equipment
11/1981
11/03/1981US4298063 Methods and apparatus for severing conduits
10/1981
10/20/1981CA1110967A1 Well cementing/plug drilling apparatus and improved cementing and drilling process
10/20/1981CA1110966A1 Pump down wipe plug and cementing/drilling process
09/1981
09/29/1981US4292589 Determining defects in oil well casings
09/22/1981US4290486 Methods and apparatus for severing conduits
09/16/1981EP0035857A2 Annulus plugging
08/1981
08/18/1981CA1107193A1 Method and apparatus for severing tubing
07/1981
07/14/1981US4278362 Method for lifting an immersed device and returning it into position, and for carrying out said method
07/14/1981US4278127 Apparatus for retrieving drill collars
07/07/1981US4276931 Junk basket
06/1981
06/30/1981US4275786 Apparatus for selectively coupling cables to well tools
05/1981
05/12/1981US4266621 Well casing window mill
02/1981
02/17/1981US4250960 Chemical cutting apparatus
01/1981
01/27/1981CA1094448A1 Actuator module for wireline cutting safety valve
12/1980
12/23/1980US4240503 Blowout preventer shearing and sealing rams
12/09/1980US4237972 Well bore apparatus adapted for being releasably coupled to suspension cables
11/1980
11/26/1980EP0019091A1 Method and apparatus for pipe inspection
10/1980
10/14/1980CA1087519A1 Well tools
09/1980
09/30/1980US4224989 Method of dynamically killing a well blowout
09/02/1980US4220034 Double action, self-contained swage
08/1980
08/05/1980US4215749 Gate valve for shearing workover lines to permit shutting in of a well
05/1980
05/20/1980CA1077831A1 Chemical cutting apparatus and method for use in wells
04/1980
04/22/1980US4199131 Actuator module for wireline cutting safety valve
04/15/1980CA1075595A1 Chemical cutting apparatus and method for use in wells
04/01/1980CA1074697A1 Method and apparatus for recovery of subsea well equipment
03/1980
03/18/1980CA1073808A1 Well casing window mill
03/04/1980US4191255 Method and apparatus for cutting and pulling tubular and associated well equipment submerged in a water covered area
02/1980
02/26/1980US4190112 Pump down wipe plug and cementing/drilling process
02/26/1980US4190111 Well cementing/plug drilling apparatus and improved cementing and drilling process
01/1980
01/22/1980US4184430 Method and apparatus for severing tubing
01/01/1980US4181196 Method and apparatus for recovery of subsea well equipment
01/01/1980CA1069044A Shear rams for hydrogen sulfide service
12/1979
12/25/1979US4180131 Chemical cutting apparatus for use in wells
09/1979
09/25/1979CA1063085A1 Valve actuator having a continuously charged accumulator
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