| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 06/20/2007 | CN2913586Y Theft protection installation for oil field pore |
| 06/19/2007 | US7231987 Deep set packer with hydrostatic setting actuator |
| 06/19/2007 | US7231986 Well tool protection system and method |
| 06/19/2007 | US7231971 Downhole safety valve assembly having sensing capabilities |
| 06/19/2007 | US7231934 Shut-off actuator with gas generation device |
| 06/14/2007 | WO2007034136A3 Sub-surface deployment valve |
| 06/13/2007 | EP1795698A2 Tubular filling system |
| 06/13/2007 | EP1794411A2 Downhole safety valve apparatus and method |
| 06/12/2007 | US7228914 Interventionless reservoir control systems |
| 06/12/2007 | CA2456189C Downhole actuation system utilizing electroactive fluids |
| 06/12/2007 | CA2367491C Wellbore packer with rupture disc |
| 06/07/2007 | US20070125554 Actuating mechanism |
| 06/07/2007 | US20070125547 Valve |
| 06/07/2007 | US20070125545 Method and apparatus for removing cuttings from drilling fluids |
| 06/06/2007 | CN2908772Y Rail style one-way flow valve |
| 06/06/2007 | CN2908771Y Three-way valve for underground oil production pipe of oil well |
| 06/06/2007 | CN2908770Y Amti-theft multipurpose valve for oil well |
| 06/05/2007 | US7225878 Methods and apparatus for production of hydrocarbons |
| 05/31/2007 | WO2007060449A2 Downhole tool |
| 05/31/2007 | US20070119626 Apparatus and methods for drilling a wellbore using casing |
| 05/31/2007 | US20070119599 Interventionless Reservoir Control Systems |
| 05/31/2007 | US20070119598 System and method for downhole operation using pressure activated and sleeve valve assembly |
| 05/31/2007 | US20070119594 Hydraulic sleeve valve with position indication, alignment, and bypass |
| 05/31/2007 | CA2630916A1 Downhole tool |
| 05/30/2007 | CN2906048Y Blowout prevention ball valve in well head |
| 05/30/2007 | CN2906047Y Antitheft bar-code magnetic-control lock mounted on gate valve support in oilfield for preventing crude oil from being stolen |
| 05/30/2007 | CN2906041Y Water injection well head device |
| 05/30/2007 | CN1318727C Method for filling well aperture of subterranean terrane with gravel and gravel filling agent |
| 05/29/2007 | CA2455476C Sand control seal for subsurface safety valve |
| 05/29/2007 | CA2432637C Method and apparatus for repair operations downhole |
| 05/29/2007 | CA2322863C Pressure actuated downhole tool |
| 05/23/2007 | EP1689971B1 Method and system for injecting a treatment fluid into a well |
| 05/23/2007 | CN2903361Y Oil well sleeve gas straight exhausting apparatus |
| 05/23/2007 | CN2903357Y Oil lifting pipe oil draining device |
| 05/23/2007 | CN2903356Y Zero leaking autitheft opening closing apparatus |
| 05/23/2007 | CN2903338Y Tubing pulling oil draining joint |
| 05/23/2007 | CN2903336Y Washout resisting spraying proof anti leakaging square drill bar joint |
| 05/23/2007 | CN1966931A Blowout-prevention blocking device for oil pipe used in oil and gas well |
| 05/22/2007 | US7219743 Method and apparatus to isolate a wellbore during pump workover |
| 05/22/2007 | US7219741 Tubing annulus valve |
| 05/22/2007 | US7219729 Permanent downhole deployment of optical sensors |
| 05/22/2007 | US7219725 Instrumented plunger for an oil or gas well |
| 05/22/2007 | CA2401184C Improving reservoir communication with a wellbore |
| 05/18/2007 | WO2007055888A1 Autonomous circulation, fill-up, and equalization valve |
| 05/17/2007 | US20070107944 Ball-activated mechanism for controlling the operation of a downhole tool |
| 05/17/2007 | US20070107903 System for use in controlling a hydrocarbon production well |
| 05/17/2007 | CA2568053A1 Ball-activated mechanism for controlling the operation of a downhole tool |
| 05/16/2007 | EP1259700B1 Tracer injection in a production well |
| 05/16/2007 | CN2900769Y Anti-blowount valve for mine downhole drilling hole |
| 05/16/2007 | CN1965147A Duplex cone expander for expanding a tubular upward and downward from preexpanded section |
| 05/15/2007 | US7218997 Controller system for downhole applications |
| 05/15/2007 | US7216713 Downhole actuating apparatus and method |
| 05/15/2007 | CA2447380C Multi-cycle dump valve |
| 05/15/2007 | CA2445297C Ball dropping assembly for wellbores |
| 05/10/2007 | WO2007051966A1 Reverse cementing float equipment |
| 05/10/2007 | US20070102164 Autonomous circulation, fill-up, and equalization valve |
| 05/09/2007 | CN2898283Y Buffering sliding-casing switch |
| 05/09/2007 | CN2898280Y Wellhead packer |
| 05/09/2007 | CN2898278Y Device against backward pouring |
| 05/09/2007 | CN1961133A Erosion resistant aperture for a downhole valve or ported flow control tool |
| 05/08/2007 | US7213653 Deep set safety valve |
| 05/08/2007 | US7213607 Mandrel for a gas lift valve |
| 05/03/2007 | WO2007050618A1 Metal-to-metal non elastomeric seal stack |
| 05/03/2007 | WO2007049968A1 An electric control system for use for activation and position control of rotary valves in an oil well |
| 05/03/2007 | WO2007049046A1 Improvements to pressure equalising devices |
| 05/03/2007 | US20070096047 Throttle device |
| 05/03/2007 | US20070095573 Pressure controlled downhole operations |
| 05/03/2007 | US20070095546 Lubricator valve with rotational flip-flap arm |
| 05/03/2007 | US20070095542 Injection valve |
| 05/03/2007 | US20070095540 Apparatus and method for managed pressure drilling |
| 05/02/2007 | CN2895724Y Diverter valve for downhole one-well two-pump technology |
| 05/02/2007 | CN2895723Y Well-drilling cementing float-ball valve anti-blocked device |
| 05/02/2007 | CN2895720Y Floating-dog gloating-shoe core-body |
| 05/02/2007 | CN1313700C Control device for kill job |
| 05/01/2007 | US7210534 Lock for a downhole tool with a reset feature |
| 05/01/2007 | CA2453904C Method and device for pressure controlled sequential operation |
| 04/30/2007 | CA2710008A1 Full bore injection valve |
| 04/26/2007 | WO2007047800A2 Apparatus and method for managed pressure drilling |
| 04/26/2007 | US20070089887 Metal-to-metal non-elastomeric seal stack |
| 04/26/2007 | US20070089876 Downhole fluid disposal apparatus and methods |
| 04/24/2007 | USRE39583 Multiple well tool control systems in a multi-valve well testing system having automatic control modes |
| 04/24/2007 | CA2253687C Apparatus and methods for stimulating a subterranean well |
| 04/21/2007 | CA2564579A1 Non-elastomeric cement through tubing retrievable safety valve |
| 04/19/2007 | WO2005081780A3 Electric-hydraulic power unit |
| 04/18/2007 | CN2890329Y Sand-stick proof by pass valve |
| 04/18/2007 | CN2890328Y Pressure-relief type bottom ball |
| 04/18/2007 | CN2890327Y Oil pipe jet-lifting device |
| 04/17/2007 | US7204315 Dual valve well control in underbalanced wells |
| 04/17/2007 | US7204313 Equalizing flapper for high slam rate applications |
| 04/12/2007 | US20070079968 Hydraulic Control and Actuation System for Downhole Tools |
| 04/12/2007 | US20070079960 Well Treatment System and Method |
| 04/11/2007 | EP1771639A2 Downhole valve |
| 04/11/2007 | EP1478825B1 Tubing hanger with ball valve in the annulus bore |
| 04/11/2007 | CN1309932C Adjustable well screen assembly and exploiting well of hydrocarbon liquid |
| 04/10/2007 | US7201232 Washpipeless isolation strings and methods for isolation with object holding service tool |
| 04/10/2007 | US7201230 Hydraulic control and actuation system for downhole tools |
| 04/10/2007 | CA2349391C Wellbore flow control device |
| 04/05/2007 | WO2007036722A1 Applications of low power bistable actuators downhole |
| 04/04/2007 | CN2886068Y Automatic control type oil drain device |
| 04/03/2007 | US7198109 Double-pin radial flow valve |