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)
09/1998
09/02/1998EP0861363A1 Side pocket mandrel
09/02/1998EP0808436B1 Method of extracting a hollow unit laid in the ground
09/01/1998CA2122394C Expanded slip well anchor
08/1998
08/27/1998WO1998037300A1 Bottomhole assembly and methods of use
08/27/1998WO1998022689A3 Whipstock
08/27/1998CA2578726A1 Bottom hole assembly and methods of use
08/26/1998EP0860907A2 Female wet connector
08/26/1998EP0860902A2 Male pin connector
08/26/1998EP0860584A2 Pump-down tool apparatus
08/26/1998EP0860583A2 Down hole mud circulation system
08/26/1998EP0859901A1 Spear head assembly
08/26/1998CN2289051Y Grab type fishing tool
08/26/1998CN1191586A Apparatus and process for drilling and completing multiple wells
08/26/1998CN1191265A Holefinding apparatus having integrated sensors
08/25/1998US5797454 Method and apparatus for downhole fluid blast cleaning of oil well casing
08/25/1998US5797453 For use in a well bore
08/19/1998EP0859124A2 Method and apparatus for completing wells with lateral branches
08/19/1998EP0859123A2 Method and apparatus for completing wells with lateral branches
08/19/1998EP0859122A2 Method and apparatus for completing wells with lateral branches
08/19/1998EP0859121A2 Method and apparatus for completing wells with lateral branches
08/19/1998EP0859120A2 Method and apparatus for completing wells with lateral branches
08/19/1998CN2288263Y Recoverable guider
08/18/1998US5794703 Wellbore tractor and method of moving an item through a wellbore
08/18/1998US5794694 Running tool
08/18/1998CA2148649C Mechanical lockout for pressure responsive downhole tool
08/18/1998CA2027211C Casing circulator and method
08/13/1998WO1998035131A2 Tool and method for removing excess cement from the top of a liner after hanging and cementing thereof
08/13/1998WO1998035130A1 Device by a retrievable bridge plug
08/13/1998CA2507746A1 Methods of completing a subterranean well and associated apparatus
08/13/1998CA2279374A1 Device by a retrievable bridge plug
08/13/1998CA2229104A1 Methods of completing a subterranean well and associated apparatus
08/12/1998EP0857854A2 Apparatus with a nipple for use in a well
08/12/1998EP0857247A1 Assembly and process for drilling and completing multiple wells
08/12/1998CN2287671Y Under well positioning device
08/11/1998US5791414 Early evaluation formation testing system
08/11/1998US5791413 Wireline-set, retrievable packer with flow control plug at the top
08/11/1998US5791412 Pressure-boost device for downhole tools
08/06/1998WO1998034007A1 Tool and method for drilling a lateral well
08/06/1998WO1998034006A1 Tool for making an opening in a tubular in a wellbore
08/04/1998US5787987 Lateral seal and control system
08/04/1998US5787982 Hydraulic disconnection device
08/04/1998US5787978 Multi-face whipstock with sacrificial face element
07/1998
07/29/1998EP0855491A2 Subterranean wellbore tool
07/28/1998US5785134 System for in-situ replacement of cutting means for a ground drill
07/28/1998US5785133 Multiple lateral hydrocarbon recovery system and method
07/28/1998US5785124 Method for accelerating production
07/23/1998WO1998031915A2 Apparatus for directing and steering the foremost part of a drillpipe at drillings
07/23/1998WO1998012418A3 Autonomous downhole oilfield tool
07/23/1998EP0862682A3 Autonomous downhole oilfield tool
07/23/1998CA2278804A1 Apparatus for directing and steering the foremost part of a drillpipe at drillings
07/22/1998EP0854266A2 Method and apparatus for retrieving a rotary pump from a wellbore
07/21/1998US5782304 Normally closed retainer valve with fail-safe pump through capability
07/21/1998US5782297 Retrieval tool for back pressure valve and tree test plug
07/21/1998US5782261 Coiled tubing sidepocket gas lift mandrel system
07/16/1998WO1998030823A2 Connector
07/16/1998CA2277470A1 Connector
07/15/1998EP0852654A1 Plug comprising a disc valve
07/15/1998EP0852653A1 Method and apparatus for selective horizontal well re-entry using retrievable diverter oriented by logging means
07/15/1998EP0852652A1 Method for isolating multi-lateral well completions while maintaining selective drainhole re-entry access
07/14/1998US5778980 Multicut casing window mill and method for forming a casing window
07/14/1998US5778978 Exterior wireline cable adapter sub
07/08/1998EP0851966A1 System for selective re-entry to completed laterals
07/07/1998US5775444 Drill string orienting motor
07/07/1998US5775433 For latching to a well tool
07/07/1998US5775428 Whipstock-setting apparatus
07/07/1998US5775422 Tree test plug
07/07/1998US5775421 Fluid loss device
07/02/1998DE19654654A1 Borehole casing method suitable for unsure formations
06/1998
06/30/1998US5771970 Tubing tightener
06/30/1998US5771969 Helical bearing anchor and catcher
06/24/1998EP0848783A2 Tubing anchor and force generator combined with such anchor
06/24/1998EP0781369B1 Apparatus for milling a well casing
06/23/1998US5769167 Thru tubing whipstock and method
06/23/1998US5769163 Adjustable flexibility anchor device with retractable arms for well tools
06/23/1998CA2113468C Lock mandrel for downhole assemblies
06/18/1998WO1998026154A1 Kick over tool for elongated well instruments
06/17/1998EP0847478A1 Tool for transporting cutting means to and from a ground drill
06/16/1998US5765641 Positionable in a subterranean well
06/16/1998US5765640 Multipurpose tool
06/16/1998CA2150358C Method and apparatus for setting a whipstock
06/10/1998EP0846839A2 Method and apparatus for placing and cementing casing in horizontal wells
06/10/1998EP0846837A2 Subterranean well bore casing milling apparatus
06/10/1998EP0846836A2 Retrievable guide anchor assembly and methods for milling a well casing
06/10/1998EP0846218A1 Downhole apparatus
06/09/1998US5762142 Coiled tubing apparatus
06/09/1998US5762137 Retrievable screen apparatus and methods of using same
06/05/1998CA2192131A1 Drilling with casing and retrievable bit-motor assembly
06/04/1998WO1998012413A3 Wellbore milling system
06/02/1998US5758731 Method and apparatus for advancing tethers
06/02/1998US5758725 Method and device for enhancing oil and gas flow in a well
06/02/1998US5758724 Underground heat exchange system
06/02/1998US5758723 Fluid pressure deactivated thru-tubing centralizer
05/1998
05/28/1998WO1998022689A2 Whipstock
05/27/1998EP0844365A2 Valve for use in subterranean well
05/27/1998CN1183131A Tubular actuator component for use in a drill-string
05/26/1998CA2135402C Guide assembly and method
05/22/1998WO1998021447A1 Method for accelerating production - c-i-p ii
05/20/1998EP0842348A1 Inflatable tubular sleeve for tubing or obturating a well or a pipe
05/20/1998EP0842347A1 Device and process for the lining of a pipe branch, particularly in an oil well
05/20/1998CN2282058Y Hydraulic back-off sub
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