| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 01/02/1997 | EP0750715A1 Valve for use in float equipment |
| 12/31/1996 | US5589825 Logging or measurement while tripping |
| 12/27/1996 | WO1996032599A3 Pump barrel seal assembly including seal/actuator element |
| 12/24/1996 | US5586609 Method and apparatus for drilling with high-pressure, reduced solid content liquid |
| 12/18/1996 | CN1138360A Horizontal tree safety valve |
| 12/16/1996 | CA2151906A1 Well completion tool and process |
| 12/10/1996 | US5582505 For pumping a highly viscous fluid |
| 12/10/1996 | CA2127013C Coiled tubing wireline retrievable and selective gas lift assembly |
| 12/05/1996 | WO1996038651A2 Method and devices for making safe an oil well in the event of a defect in the hydraulic control line of its bottom safety valve |
| 12/04/1996 | EP0745176A1 Gas lift system with retrievable gas lift valve |
| 12/03/1996 | US5579844 Single trip open hole well completion system and method |
| 12/03/1996 | US5579842 Bottomhole data acquisition system for fracture/packing mechanisms |
| 12/03/1996 | US5579841 Plugs for well logging operations |
| 12/03/1996 | CA2148169C Temporary plug system |
| 11/28/1996 | WO1996037317A1 Apparatus for passive removal of subsurface contaminants |
| 11/28/1996 | WO1996024752A3 Method and appartus for remote control of wellbore end devices |
| 11/26/1996 | US5579283 Method and apparatus for communicating coded messages in a wellbore |
| 11/26/1996 | US5577925 For auxiliary conduits attached to well tubulars |
| 11/20/1996 | CN2240606Y Pump valve for well-drilling pump |
| 11/19/1996 | US5575336 Safety valve for horizontal tree |
| 11/16/1996 | CA2175940A1 Control system with collection chamber |
| 11/14/1996 | WO1996035857A1 Completion sub-sea test tree |
| 11/12/1996 | CA2096999C Stabilization and control of surface sagd production wells |
| 10/31/1996 | WO1996034176A2 Hydraulic shifting tool for sliding sleeves |
| 10/31/1996 | WO1996034175A2 Cementing plug |
| 10/30/1996 | EP0740049A2 Coiled tubing actuated sampler |
| 10/30/1996 | EP0613514B1 Mud check valves in drilling apparatus (wells) |
| 10/30/1996 | CN2238903Y Combination valve |
| 10/22/1996 | US5566757 Method and apparatus for setting sidetrack plugs in open or cased well bores |
| 10/17/1996 | WO1996032599A2 Pump barrel seal assembly including seal/actuator element |
| 10/17/1996 | WO1996024745A3 Computer controlled downhole tools for production well control |
| 10/16/1996 | CN2237716Y Assembled valve for pumping unit casinghead |
| 10/16/1996 | CN2237715Y Hydraulic braking valve mechanism of disc brake system for well repairing equipment |
| 10/15/1996 | US5564675 Subsurface safety valve of minimized length |
| 10/15/1996 | US5564502 Well completion system with flapper control valve |
| 10/15/1996 | US5564501 Control system with collection chamber |
| 10/09/1996 | EP0736129A1 Horizontal tree safety valve |
| 10/09/1996 | CN2237109Y Anti-flush controllable non-return valve for back pressure |
| 10/02/1996 | EP0735233A2 Hydraulically actuated sleeve valve for wells |
| 09/25/1996 | EP0733775A2 Method and apparatus for setting a sidetrack plug in a well bore |
| 09/24/1996 | US5558532 Electrical connection |
| 09/24/1996 | US5558162 Mechanical lockout for pressure responsive downhole tool |
| 09/24/1996 | US5558153 Method & apparatus for actuating a downhole tool |
| 09/18/1996 | EP0732479A2 Remotely adjustable valve and method for using same |
| 09/17/1996 | US5555935 Fluid connector for well |
| 09/12/1996 | WO1996027732A2 Shifting tool, releasing mechanism, position feedback method and method of releasing |
| 09/12/1996 | CA2188541A1 Overpull shifting tool |
| 09/11/1996 | CN2235015Y Dual-purpose steel ring for oil production and gas injection |
| 09/10/1996 | US5553667 Plug holding device |
| 09/03/1996 | US5551665 Ball valve with coiled tubing cutting ability |
| 08/29/1996 | WO1996026376A1 Improved valve plunger |
| 08/28/1996 | EP0728914A2 Cementing tool for wells |
| 08/27/1996 | US5549161 Overpull shifting tool |
| 08/22/1996 | WO1996025583A1 Single trip open hole well completion system and method |
| 08/20/1996 | US5547029 For communication between the surface of a well and a downhole well tool |
| 08/15/1996 | WO1996024752A2 Method and appartus for remote control of wellbore end devices |
| 08/15/1996 | WO1996024751A1 An acoustic transmisson system |
| 08/15/1996 | WO1996024749A1 Method and apparatus for the remote control and monitoring of production wells |
| 08/15/1996 | WO1996024747A1 Downhole production well control system and method |
| 08/15/1996 | WO1996024745A2 Computer controlled downhole tools for production well control |
| 08/15/1996 | CA2187423A1 An acoustic transmisson system |
| 08/13/1996 | US5544707 Wellhead |
| 08/13/1996 | US5544705 Method for injecting fluid into a wellbore |
| 07/31/1996 | EP0724065A2 Tubing actuated valve assembly and method of placing a tubing into a borehole |
| 07/31/1996 | CA2168311A1 Well completion system with well control valve |
| 07/30/1996 | CA2003438C Selective valve to pass fluids |
| 07/18/1996 | WO1996021794A1 Method for injecting fluid into a wellbore |
| 07/18/1996 | WO1996008635A3 Apparatus for the remote deployment of valves |
| 07/16/1996 | US5535835 Straight/directional drilling device |
| 07/16/1996 | US5535828 Wellbore system with retrievable valve body |
| 07/16/1996 | US5535826 Well-head structures |
| 07/16/1996 | US5535767 Remotely actuated adjustable choke valve and method for using same |
| 07/11/1996 | WO1996021082A1 Improved isolation system and gravel pack assembly and uses thereof |
| 07/10/1996 | CN2230810Y Safety valve on hole top |
| 07/09/1996 | US5533876 Pump barrel seal assembly including seal/actuator element |
| 07/09/1996 | US5533571 Fluid jetting apparatus for use in a well |
| 07/03/1996 | EP0719905A1 Wellhead |
| 07/02/1996 | US5531273 Well completion tool and process |
| 07/02/1996 | US5531270 For controlling fluid flow in a well |
| 06/26/1996 | EP0718466A1 Downhole tool with hydraulic timer |
| 06/25/1996 | US5529285 Oilfield valve |
| 06/25/1996 | US5529126 Valve control apparatus |
| 06/20/1996 | WO1996018800A1 Method and apparatus for drilling with high-pressure, reduced solid content liquid |
| 06/18/1996 | US5526883 Safety valve closure system |
| 06/18/1996 | US5526878 Cementing tool apparatus for use in a well bore |
| 06/11/1996 | US5524517 Apparatus for cutting columnar structures with reciprocally movable tensioned cutting wire |
| 06/05/1996 | CN1031952C Manufacturing method for lead filled and high density faner ball |
| 06/04/1996 | US5522465 Method and apparatus for a safety system |
| 05/23/1996 | WO1996001359A3 Logging or measurement while tripping |
| 05/21/1996 | US5518073 Mechanical lockout for pressure responsive downhole tool |
| 05/17/1996 | CA2135951A1 Safety valve controller method and apparatus |
| 05/08/1996 | EP0578770B1 Handle enclosure for valves |
| 05/07/1996 | US5513703 Methods and apparatus for perforating and treating production zones and otherwise performing related activities within a well |
| 05/02/1996 | WO1996012866A1 System for pumping well fluids |
| 05/02/1996 | WO1996012865A1 Tubing conveyed perforating system with completion fluid loss control |
| 05/02/1996 | WO1996012864A1 Subsurface safety valve of minimized length |
| 05/01/1996 | EP0709543A2 Downhole casing filling and circulating apparatus and method |
| 04/30/1996 | US5511617 Apparatus and method for temporarily plugging a tubular |
| 04/25/1996 | WO1996012087A1 Safety valve closure system |
| 04/23/1996 | US5509442 Mud saver valve |