Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 23 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
Patents for E21B 23 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells (12,712)
10/1991
10/16/1991EP0452033A2 A fluid flow control system, assembly and method for oil and gas wells
10/13/1991CA2037791A1 Fluid flow control system, assembly and method for oil and gas wells
10/10/1991DE4010638A1 Underground storage of containers of radioactive waste
10/09/1991EP0451058A1 Method and apparatus for discarding a tubing in an access well to a salt cavity for gas storage
10/09/1991EP0450207A1 Downhole drilling tool system
10/09/1991CN2086301U Righting anti-winding unit
10/08/1991US5055002 Downhole pump with retrievable nozzle assembly
10/08/1991US5054558 Equalizing blank valve apparatus and methods
10/08/1991US5054557 Device for extracting a liquid out of a tube of great length
10/08/1991US5054555 Tension-actuated mechanical detonating device useful for detonating downhole explosive
10/08/1991CA1290467C Methods and apparatus for safely measuring downhole conditions and formation characteristics while drilling a borehole
10/01/1991US5052483 Sand control adapter
10/01/1991CA2030210A1 Single plug arrangement, lock therefor and method of use
09/1991
09/25/1991CN1014094B Downhole electromagnetic seismic source
09/24/1991US5050682 Coupling apparatus for a tubing and wireline conveyed method and apparatus
09/24/1991US5050672 Pump apparatus including a firing head for use with a perforating gun on a tubing string
09/24/1991CA1289467C Tubing packer
09/24/1991CA1289466C Air chamber actuated dual tubing release assembly
09/19/1991WO1991014074A1 Composite rod-stiffened pressurized cable
09/19/1991WO1991014072A1 Composite rod-stiffened wireline cable for transporting well tool
09/18/1991EP0446976A2 Gravel packer and service tool
09/17/1991US5048613 Wireline resettable packoff assembly
09/17/1991US5048612 Double nut setting tool and linger hanger assembly
09/17/1991US5048606 Setting tool for a liner hanger assembly
09/17/1991CA1289061C Pipe connector and method of applying same
09/17/1991CA1289058C Subsea riser for multiple bore wells
09/03/1991US5044442 Casing hanger running tool using annulus pressure
09/03/1991US5044441 Pack-off well apparatus and method
09/03/1991US5044438 Wellhead bowl protector and retrieving tool
09/03/1991US5044437 Method and device for performing perforating operations in a well
08/1991
08/27/1991US5042584 Injecting liquids
08/21/1991CN1013604B Releasing installation of bridge plug device
08/20/1991US5040619 Wireline supported perforating gun enabling oriented perforations
08/20/1991US5040608 Anchorable pack-off assembly and method of seating the same
08/20/1991US5040600 Geothermal wellhead repair unit
08/20/1991US5040598 Pulling tool for use with reeled tubing and method for operating tools from wellbores
08/20/1991US5040597 Well apparatus including a pump and a firing head adapted to be inserted into a tubing which includes a perforating gun
08/14/1991EP0441021A1 Packer locking apparatus
08/13/1991US5038862 External sleeve cementing tool
08/13/1991US5038860 Hydraulically actuated liner hanger
08/13/1991CA1287567C Circulation valve and method for operating the same
08/07/1991EP0263148B1 Downhole electromagnetic seismic source
08/06/1991US5036922 Single plug arrangement, lock therefor and method of use
07/1991
07/30/1991CA1287160C Method and device for the installation of seismic sensors in a producer oil well
07/30/1991CA1286982C Hydraulic stabilizer for bore hole tool
07/24/1991CN1053279A Hydraulic release oil tool
07/24/1991CN1053278A Well casing flotation device and method
07/23/1991US5033553 Intra-perforating gun swivel
07/23/1991US5033551 Well packer and method
07/23/1991US5033550 Well production method
07/23/1991CA1286602C Tubing resettable well packer
07/23/1991CA1286600C Downhole lock assembly
07/23/1991CA1286598C Apparatus for monitoring a parameter in a well
07/18/1991WO1991010806A1 Centralizers for oil well casings
07/10/1991EP0436417A2 A tubing and wireline conveyed perforating method and apparatus
07/09/1991US5029644 Jetting tool
07/09/1991US5029643 Drill pipe bridge plug
07/09/1991US5029642 Apparatus for carrying tool on coil tubing with shifting sub
07/09/1991CA1285863C Foot valve for pumping wells
07/03/1991EP0435856A2 Multi-mode testing tool
07/03/1991CN1052717A Positioning tool
07/02/1991US5027918 Sidewall locking downhole seismic signal detector
07/02/1991US5027903 Coiled tubing velocity string hangoff method and apparatus
07/02/1991CA1285474C Slip gripping mechanism
07/02/1991CA1285473C Latch and retrieving assembly
06/1991
06/30/1991WO1991009907A1 Polymer and asphalt reaction process and polymer-linked-asphalt product
06/30/1991CA2072579A1 Polymer and asphalt reaction process and polymer-linked-asphalt product
06/25/1991US5025861 Tubing and wireline conveyed perforating method and apparatus
06/25/1991US5025857 Wellhead tubing and casing packer and installation and removal tool
06/19/1991EP0433126A1 System for moving a non rigid exploration device in a deviated or narrow well
06/18/1991USRE33614 Apparatus and method for enhanced oil recovery
06/18/1991US5024277 Running tool for use in well bores
06/18/1991US5024274 Method and apparatus for enhanced oil recovery
06/18/1991US5024270 Well sealing device
06/13/1991WO1991008370A2 Device for steering the foremost part of a drill pipe
06/13/1991CA2067802A1 Device for steering the foremost part of a drill pipe
06/12/1991EP0431689A1 Packer and service tool assembly
06/11/1991US5022473 Adjustable fishing jar
06/05/1991CN1051958A Casing valve
06/05/1991CN1051956A Downhole jetting tool
06/04/1991US5020612 Wire line core drilling apparatus
06/04/1991US5020592 Tool for treating subterranean wells
05/1991
05/28/1991US5018583 Well process using a composite rod-stiffened pressurized cable
05/28/1991US5018582 Hydraulic running and release tool with mechanical emergency release
05/22/1991CN1051607A Method of well completion
05/21/1991US5016727 Method and device of seismic prospection in wells and particularly deviated wells
05/15/1991EP0427423A2 Downhole jetting tool
05/15/1991EP0427422A2 Casing valve
05/15/1991EP0427421A2 Positioning tool
05/15/1991EP0427371A1 Method of well completion
05/14/1991US5014578 Pipe tongs
05/09/1991CA2029532A1 Positioning tool
05/09/1991CA2029531A1 Jetting tool
05/07/1991US5012871 Fluid flow control system, assembly and method for oil and gas wells
05/07/1991US5012867 Well flow control system
05/02/1991WO1991005937A1 Downhole pump unseating apparatus and method
05/02/1991EP0424452A1 Plug for well logging operations.
04/1991
04/30/1991US5010955 Casing mill and method
04/30/1991US5010764 Method and apparatus for logging short radius horizontal drainholes
04/23/1991US5009265 Packer for wellhead repair unit
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