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)
12/1998
12/09/1998EP0882870A2 A method of communicating data and control signals between a down hole well tool and surface equipment
12/09/1998EP0882869A2 Method of perforating a well casing and downhole tool hanger
12/09/1998EP0882868A2 Method of suspending an ESP within a wellbore
12/09/1998EP0866951A4 Differential pressure measurement systems for fluid streams
12/08/1998US5845711 For lowering a downhole tool on a coiled tubing through an outer pipe string
12/08/1998US5845710 Methods of completing a subterranean well
12/08/1998US5845707 Method of completing a subterranean well
12/08/1998US5845669 For pressure relief of a downhole tool body prior to disassembly
12/08/1998CA2151276C An insert for releasably retaining cutting means in a ground drill
12/08/1998CA2151275C A drive sub for receipt of bit segments
12/08/1998CA2151274C Bit segment for seating in a cutting position to form cutting means
12/08/1998CA2151273C A tool for transporting cutting means for in situ replacement of cutting means
12/08/1998CA2151272C System for in situ replacement of cutting means for a ground drill
12/03/1998WO1998054440A1 Method and device for cleaning out a well or piping blocked with gas hydrates
12/03/1998WO1998054439A1 Downhole pressure activated device and a method
12/03/1998WO1998054438A1 Bottomhole assembly orienting sub
12/03/1998WO1998045568A3 Whipstock and installing and retrieving tools
12/02/1998EP0881355A2 System for deploying an electrical submersible pump within a wellbore
12/02/1998EP0881354A2 Method and apparatus for cementing a well
12/02/1998EP0880637A1 Hydraulically releasable coupling
12/01/1998US5842528 Method of drilling and completing wells
12/01/1998CA2148197C Wireline set, tubing retrievable well packer with flow control device run at top
11/1998
11/29/1998CA2239001A1 System for deploying an esp within a wellbore
11/19/1998WO1998035131A3 Tool and method for removing excess cement from the top of a liner after hanging and cementing thereof
11/19/1998WO1998030823A3 Connector
11/18/1998EP0877853A2 Downhole valve
11/18/1998CN1199255A Female wet connector
11/18/1998CN1199254A Male pin connector
11/18/1998CN1199130A Logging tool deployment apparatus and method
11/17/1998US5836396 Method of operating a downhole clutch assembly
11/17/1998US5836387 System for securing an item in a tubular channel in a wellbore
11/17/1998US5836385 Apparatus for deploying wireline
11/12/1998WO1998050681A1 Wellbores utilizing fiber optic-based sensors and operating devices
11/12/1998WO1998050680A2 Monitoring of downhole parameters and tools utilizing fiber optics
11/11/1998EP0876546A1 Completions insertion and retrieval under pressure (cirp) apparatus including the snaplock connector
11/11/1998EP0763161B1 Method for setting a whipstock in a wellbore
11/10/1998US5833015 Method and apparatus for sinking pipes or cables into a pilot borehole
11/10/1998US5833004 Method of running liners into a wellbore
11/10/1998US5832998 Coiled tubing deployed inflatable stimulation tool
11/10/1998US5832997 Retrievable milling guide anchor apparatus and associated methods
11/05/1998WO1998049424A1 Using equipment in a well system
11/04/1998EP0875661A1 Method for moving equipment in a well system
11/04/1998EP0875659A2 Valve for use in a subterranean well
11/03/1998US5831156 Downhole system for well control and operation
11/03/1998US5829531 Mechanical set anchor with slips pocket
11/03/1998US5829526 Method and apparatus for placing and cementing casing in horizontal wells
11/03/1998US5829525 Bypass tool
11/03/1998US5829518 Mill guide and anchor assembly for subterranean well casings
11/03/1998CA2144901C Spoolable coiled tubing mandrel and gas lift valves
11/01/1998CA2241360A1 Surge anchor assembly
11/01/1998CA2236457A1 Pressure activated switch valve
10/1998
10/29/1998WO1998048145A1 Multizone production monitoring system
10/29/1998CA2286758A1 Multizone production monitoring system
10/27/1998US5826661 Linear indexing apparatus and methods of using same
10/27/1998US5826652 Packer-setting assembly
10/27/1998US5826651 Wellbore single trip milling
10/22/1998WO1998046855A1 Apparatus for removing an item from a wellbore
10/22/1998WO1998046854A1 Side pocket mandrel for a measuring instrument
10/21/1998EP0872626A2 Method and apparatus for locating indexing systems in a cased well and conducting multilateral branch operations
10/21/1998EP0871817A1 Apparatus for setting a liner in a well casing
10/21/1998EP0871816A1 Release mechanism
10/20/1998US5823263 Method and apparatus for remote control of multilateral wells
10/20/1998US5823254 Well completion tool
10/15/1998WO1998045571A1 Window assembly for multiple wellbore completions
10/15/1998WO1998045570A1 Method and apparatus for deploying a well tool into a lateral wellbore
10/15/1998WO1998045568A2 Whipstock and installing and retrieving tools
10/15/1998WO1998019042A3 Method and apparatus to isolate a formation zone
10/14/1998EP0870901A2 Downhole tool
10/13/1998US5819854 Activation of downhole tools
10/13/1998US5819852 Monobore completion/intervention riser system
10/13/1998CA2143735C Drill string anchor
10/07/1998CN1195389A Inflatable tubular sleeve for tubing or obturating well or pipe
10/07/1998CN1195065A Method and apparatus for drilling and re-entering multiple lateral branches in well
10/01/1998WO1998042946A1 Electrically actuated disconnect apparatus
09/1998
09/30/1998EP0866951A1 Differential pressure measurement systems for fluid streams
09/30/1998EP0866911A1 Improved measurement port coupler and probe interface
09/29/1998US5813481 System for in situ replacement of cutting means for a ground drill
09/29/1998US5813460 Formation evaluation tool and method for use of the same
09/29/1998US5813458 Indicating dog sub for weight-set packers
09/29/1998CA2144023C Short wellhead plug
09/23/1998EP0865564A1 Down hole bypass valve
09/22/1998US5810088 Electrically actuated disconnect apparatus and method
09/22/1998US5810080 Device for exploring an underground formation crossed by a horizontal well comprising several anchorable sondes
09/15/1998US5808192 Arrangement for acquiring downhole information
09/15/1998US5806599 Method for accelerating production
09/15/1998US5806595 Wellbore milling system and method
09/15/1998US5806590 Torque-resistant slip
09/11/1998WO1998031915A3 Apparatus for directing and steering the foremost part of a drillpipe at drillings
09/09/1998EP0862682A2 Autonomous downhole oilfield tool
09/09/1998EP0862681A2 Downhole apparatus and method for expanding a tubing
09/09/1998EP0862680A1 A sleeve for orientating a tool
09/09/1998EP0862679A1 Downhole equipment
09/09/1998CN1192502A Down hole mud circulation system
09/08/1998US5804713 Apparatus for sensor installations in wells
09/08/1998US5803175 Perforating gun connection and method of connecting for live well deployment
09/08/1998US5803167 Computer controlled downhole tools for production well control
09/04/1998CA2230425A1 Alignment system for a slip
09/03/1998WO1998038411A2 Apparatus for use in drilling operations
09/03/1998WO1998014685A3 Improved emergency release tool
09/02/1998EP0861968A2 Annulus pressure responsive tool apparatus
1 ... 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 ... 128