| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
|---|
| 06/28/1995 | CN2202181Y Pulsating water-pressure generating valve for use in oil field water-filling well |
| 06/27/1995 | US5427133 Coiled tubing wireline retrievable and selective set gas lift assembly |
| 06/21/1995 | CN2201482Y Rotary replaceable hole plate valve |
| 06/20/1995 | US5425424 Casing valve |
| 06/20/1995 | US5425423 Well completion tool and process |
| 06/20/1995 | US5425420 Spoolable coiled tubing completion system |
| 06/13/1995 | US5423383 Spoolable flexible hydraulic controlled coiled tubing safety valve |
| 06/11/1995 | CA2135699A1 Control system |
| 06/09/1995 | CA2136591A1 Well apparatus |
| 05/31/1995 | CA2110322A1 Choke |
| 05/23/1995 | US5417291 Drilling connector |
| 05/16/1995 | US5415378 Valve assembly |
| 05/16/1995 | US5415237 Control system |
| 05/16/1995 | CA2098863C Friction plug for a high pressure pipe |
| 05/09/1995 | US5413310 For use in oil and gas installations for offshore production |
| 05/09/1995 | US5413180 One trip backwash/sand control system with extendable washpipe isolation |
| 05/09/1995 | US5413175 Stabilization and control of hot two phase flow in a well |
| 05/09/1995 | US5413173 Well apparatus including a tool for use in shifting a sleeve within a well conduit |
| 05/09/1995 | US5413170 Spoolable coiled tubing completion system |
| 05/02/1995 | US5412568 Remote programming of a downhole tool |
| 05/02/1995 | US5411097 High pressure conversion for circulating/safety valve |
| 05/02/1995 | US5411096 Surface controlled, subsurface tubing safety valve |
| 05/02/1995 | US5411095 Apparatus for cementing a casing string |
| 05/02/1995 | US5411085 Spoolable coiled tubing completion system |
| 05/02/1995 | US5411081 Spoolable flexible hydraulically set, straight pull release well packer |
| 05/02/1995 | US5411049 For controlling flow of a fluid in a conduit |
| 05/02/1995 | CA1335449C Drilling equipment |
| 04/27/1995 | WO1995011369A1 Friction plug for a high pressure pipe |
| 04/25/1995 | US5409061 Gravel packing system with fracturing and diversion of fluid |
| 04/25/1995 | CA2075255C Wet christmas tree |
| 04/18/1995 | US5407172 Position instrumented blowout preventer |
| 04/13/1995 | WO1995009965A1 Casing conveyed flowports for borehole use |
| 04/12/1995 | EP0647301A1 Pressure relief valve |
| 03/21/1995 | US5398764 Well tool system and method for use in a well conduit |
| 03/14/1995 | US5396953 For use in a wellbore |
| 03/14/1995 | US5396950 Apparatus and methods for horizontal completion of a water well |
| 03/08/1995 | CN2191276Y Self-heating cut-off valve |
| 03/07/1995 | US5394943 Subsurface shutdown safety valve and arrangement system |
| 03/07/1995 | US5394941 Fracture oriented completion tool system |
| 03/01/1995 | CN2190694Y Lock ring type oil leaking device |
| 02/28/1995 | US5392862 Flow control sub for hydraulic expanding downhole tools |
| 02/28/1995 | CA2130951A1 Coiled tubing operated full opening completion tool system |
| 02/22/1995 | EP0639689A2 Multiple stage well cementing apparatus |
| 02/22/1995 | EP0528013B1 Method of checking that an oil well safety valve is operating correctly |
| 02/21/1995 | US5390742 Internally sealable perforable nipple for downhole well applications |
| 02/18/1995 | CA2130302A1 Method and apparatus for the multiple stage cementing of a casing string in a well |
| 02/09/1995 | DE4427367A1 Vorrichtung zum Bestimmen der Kolbenlage in einem Ausbruchschieber Apparatus for determining the piston position in a blowout |
| 02/08/1995 | EP0637675A1 Electrical connection |
| 02/08/1995 | CN1027602C Numerical control oil well measuring station valve group |
| 02/07/1995 | CA2043756C Drill pipe bridge plug |
| 02/07/1995 | CA2017640C Well completions |
| 01/31/1995 | US5385207 Offshore well remote start-up system |
| 01/24/1995 | US5383520 For use on coiled tubing in a well bore |
| 01/18/1995 | EP0634560A1 Downhole safety valve |
| 01/17/1995 | US5381862 Coiled tubing operated full opening completion tool system |
| 01/13/1995 | CA2117296A1 Downhole safety valve |
| 01/12/1995 | WO1995001497A1 Telescoping conduits for increasing the fluid resistance of well production tubing |
| 01/11/1995 | EP0633391A2 Sliding sleeve casing tool |
| 01/10/1995 | US5379839 Well testing valve |
| 01/10/1995 | CA2021891C Pressure balanced cartridge choke valve |
| 01/05/1995 | WO1995000740A1 Tool for use in wellbore operations |
| 01/05/1995 | CA2155206A1 Tool for use in wellbore operations |
| 12/27/1994 | US5375662 For applying hydraulic pressure to an operated well |
| 12/27/1994 | US5375659 Sonde supported operating system for control of formation production fluid flow |
| 12/27/1994 | US5375658 Shut-in tools and method |
| 12/27/1994 | US5375478 For several separate testing points |
| 12/22/1994 | WO1994029572A1 Method and apparatus for communicating coded messages in a wellbore |
| 12/14/1994 | EP0470972B1 Ball valve actuating member with force multiplier |
| 12/13/1994 | US5372202 Wellhead isolation tool and method of use |
| 12/13/1994 | US5372197 Tubing unloader apparatus and method |
| 12/13/1994 | US5372193 Completion test tool |
| 12/08/1994 | WO1994028283A1 Tubing unloader apparatus and method |
| 12/07/1994 | EP0627545A2 Annular safety system for cased well |
| 12/07/1994 | CN2184777Y Inner and outer self closing high pressure steam injection valve |
| 12/06/1994 | US5370362 Gate valve |
| 11/30/1994 | CN2184082Y Gas injecting valve for oil field |
| 11/29/1994 | US5368100 Coiled tubing actuated sampler |
| 11/29/1994 | US5368098 Stage tool |
| 11/29/1994 | CA2010746C Sub-sea valve actuator |
| 11/22/1994 | US5366013 Shock absorber for use in a wellbore including a frangible breakup element preventing shock absorption before shattering allowing shock absorption after shattering |
| 11/22/1994 | US5365769 Method for verifying the correct operation of a safety valve of an oil well |
| 11/17/1994 | EP0624711A1 Valve assembly in wellheads |
| 11/17/1994 | EP0624709A2 Drilling string connector |
| 11/15/1994 | CA2123357A1 Drilling connector |
| 11/12/1994 | CA2121557A1 Valve assembly |
| 11/10/1994 | WO1994025725A1 Well plugging apparatus and method |
| 11/08/1994 | US5361843 Method for completing a well |
| 11/08/1994 | US5361840 Well plugging apparatus and method |
| 11/02/1994 | EP0622522A2 Hydraulic port collar |
| 11/02/1994 | EP0622521A2 Combination packer/safety valve assembly for gas storage wells |
| 11/01/1994 | CA2022211C Valve with removable insert |
| 10/25/1994 | US5358053 Subsurface safety valve |
| 10/25/1994 | US5358048 For use in cementing operations in a well bore |
| 10/25/1994 | US5358035 Control cartridge for controlling a safety valve in an operating well |
| 10/25/1994 | CA2010326C Wellhead repair unit |
| 10/18/1994 | USRE34758 Travelling disc valve apparatus |
| 10/18/1994 | US5355960 Pressure change signals for remote control of downhole tools |
| 10/18/1994 | US5355959 Differential pressure operated circulating and deflation valve |
| 10/18/1994 | US5355953 Electromechanical shifter apparatus for subsurface well flow control |
| 10/11/1994 | US5353877 Electrically controlled latch for well applications |