| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 05/19/2009 | US7533727 Oil well completion tool having severable tubing string barrier disc |
| 05/19/2009 | US7533719 Wellhead with non-ferromagnetic materials |
| 05/19/2009 | CA2481639C Improving reservoir communication by creating a local underbalance and using treatment fluid |
| 05/14/2009 | WO2009061387A2 Wellsite measurement and control while producing device |
| 05/14/2009 | WO2009060233A1 'valve assembly' |
| 05/14/2009 | WO2009035917A3 Method and apparatus for multi-positioning a sleeve |
| 05/14/2009 | WO2008128066A3 Cement plug launch system |
| 05/14/2009 | US20090120647 Flow restriction apparatus and methods |
| 05/14/2009 | US20090120641 Well Flow Control Systems and Methods |
| 05/14/2009 | CA2701994A1 Valve assembly |
| 05/13/2009 | EP1537292B1 Ball operated by-pass tool for use in drillstring |
| 05/13/2009 | CN201236678Y Oil extraction pipe with water control valve and longitudinal rib |
| 05/13/2009 | CN201236670Y Production insertion head for oil layer protection valve |
| 05/13/2009 | CN201236669Y Oil layer protection valve |
| 05/13/2009 | CN201236668Y Direct connection type workover water tap |
| 05/13/2009 | CN101432501A Multi-zone, single trip well completion system and methods of use |
| 05/12/2009 | US7530799 Long-stroke deep-well pumping unit |
| 05/12/2009 | US7530401 Tool trap assembly and method |
| 05/12/2009 | US7530400 Downhole tool for selectively catching balls in a well bore |
| 05/12/2009 | CA2573379C Wellbore flow control device |
| 05/12/2009 | CA2402203C Oilwell casing electrical power pick-off points |
| 05/12/2009 | CA2401734C Wireless reservoir production control |
| 05/09/2009 | CA2643505A1 Apparatus and method for deliquifying a well |
| 05/07/2009 | WO2009056842A2 Object manoeuvring apparatus |
| 05/07/2009 | WO2009056840A2 Subsea assembly |
| 05/07/2009 | WO2009056832A2 Nested flextensional transducer and cylindrical actuator modules |
| 05/07/2009 | WO2009038997A3 Tubing retrievable injection valve |
| 05/07/2009 | US20090114396 Wellsite measurement and control while producing device |
| 05/07/2009 | US20090114395 Density actuatable downhole member and methods |
| 05/07/2009 | US20090114393 Diverter valve |
| 05/07/2009 | US20090114389 Communication Tool for Accessing a Non Annular Hydraulic Chamber of a Subsurface Safety Valve |
| 05/07/2009 | US20090114383 Gas lift apparatus for flushing and snubbing well |
| 05/07/2009 | CA2704477A1 Object manoeuvring apparatus |
| 05/07/2009 | CA2704476A1 Subsea assembly |
| 05/06/2009 | EP1875037B1 Valve |
| 05/05/2009 | US7527104 Selectively activated float equipment |
| 04/30/2009 | WO2009055402A2 Tubing retrievable capillary bypass safety valve and capillary injection sleeve |
| 04/30/2009 | US20090107683 Tubing retrievable capillary bypass safety valve and capillary injection sleeve |
| 04/29/2009 | EP2053289A2 Monitoring a solenoid of a directional control valve |
| 04/29/2009 | EP2053196A1 System and method for controlling the pressure in a wellbore |
| 04/29/2009 | CN201228537Y Check valve of water injection well distributor |
| 04/29/2009 | CN101421487A Gravel pack crossover tool with single position multi-function capability |
| 04/29/2009 | CN101421485A Method and system for controlling a downhole flow control device |
| 04/28/2009 | US7523787 Reverse out valve for well treatment operations |
| 04/28/2009 | CA2401791C Wireless power and communications cross-bar switch |
| 04/28/2009 | CA2358809C Improved subsurface safety valve |
| 04/23/2009 | WO2009052149A2 Permeable medium flow control devices for use in hydrocarbon production |
| 04/23/2009 | WO2009052103A2 Water sensing devices and methods utilizing same to control flow of subsurface fluids |
| 04/23/2009 | WO2009052091A2 Water control device using electromagnetics |
| 04/23/2009 | WO2009052076A2 Water absorbing materials used as an in-flow control device |
| 04/23/2009 | WO2009050518A2 Method and device |
| 04/23/2009 | WO2009050517A2 Method of and apparatus for completing a well |
| 04/23/2009 | WO2006086165A3 Flow valve and method |
| 04/23/2009 | US20090101357 Device and system for well completion and control and method for completing and controlling a well |
| 04/23/2009 | US20090101356 Device and system for well completion and control and method for completing and controlling a well |
| 04/23/2009 | US20090101354 Water Sensing Devices and Methods Utilizing Same to Control Flow of Subsurface Fluids |
| 04/23/2009 | US20090101352 Water Dissolvable Materials for Activating Inflow Control Devices That Control Flow of Subsurface Fluids |
| 04/23/2009 | US20090101350 Modular backup fluid supply system |
| 04/23/2009 | US20090101341 Water Control Device Using Electromagnetics |
| 04/23/2009 | CA2701801A1 Permeable medium flow control devices for use in hydrocarbon production |
| 04/23/2009 | CA2701326A1 Water sensing devices and methods utilizing same to control flow of subsurface fluids |
| 04/23/2009 | CA2699578A1 Method of and apparatus for completing a well |
| 04/22/2009 | EP2049766A1 Method for flow control and autonomous valve or flow control device |
| 04/22/2009 | CN201225130Y Downhole remote pressure control valve |
| 04/22/2009 | CN201225129Y Oil gas well selective well completion switch tool |
| 04/22/2009 | CN201225128Y Novel inner blowout prevention tool |
| 04/22/2009 | CN201225127Y Guide press valve assembly |
| 04/22/2009 | CN201225126Y Horizontal fixing valve |
| 04/22/2009 | CN201225125Y 闸板阀防盗装置 Gate valve anti-theft device |
| 04/22/2009 | CN201225124Y Sound wave gas injection single flow valve assembly |
| 04/22/2009 | CN101413385A Well head safe hydraulic pressure cut-off apparatus |
| 04/21/2009 | US7520336 Multiple dart drop circulating tool |
| 04/21/2009 | US7520332 Method and associated system for setting downhole control pressure |
| 04/21/2009 | US7520329 Injection valve |
| 04/21/2009 | US7520326 Method and apparatus for performing down hole sand and gravel fracture packing operations |
| 04/16/2009 | WO2009048922A1 Circulation control valve and associated method |
| 04/16/2009 | WO2009048823A2 A method and apparatus for determining a parameter at an inflow control device in a well |
| 04/16/2009 | WO2009048822A2 Flow restriction device |
| 04/16/2009 | WO2009026217A3 Switching apparatus between independent control systems for a subsurface safety valve |
| 04/16/2009 | WO2009023611A3 Multi-position valve for fracturing and sand control and associated completion methods |
| 04/16/2009 | WO2009023610A3 Ball seat having fluid activated ball support |
| 04/16/2009 | WO2009020826A4 Shape memory alloy closure spring for subsurface safety valves triggered by well fluids |
| 04/16/2009 | US20090095486 Circulation control valve and associated method |
| 04/16/2009 | US20090095484 In-Flow Control Device Utilizing A Water Sensitive Media |
| 04/16/2009 | US20090095466 Downhole Force Generator |
| 04/16/2009 | US20090095464 System and method for providing additional blowout preventer control redundancy |
| 04/16/2009 | CA2700320A1 Flow restriction device |
| 04/15/2009 | EP2047166A1 Metal to metal seal for downhole tools |
| 04/15/2009 | CN201221358Y Anti-theft device of well head sampling valve |
| 04/15/2009 | CN201221339Y Metering control valve and oil well quality on-line metering device using the same |
| 04/15/2009 | CN201221338Y Quantitative water mixing valve |
| 04/15/2009 | CN201221337Y Single well water injection amount regulating and controlling valve |
| 04/15/2009 | CN101408096A Visual dark rod flat plate gate valve |
| 04/14/2009 | US7516792 Remote intervention logic valving method and apparatus |
| 04/09/2009 | WO2009023613A3 Deformable ball seat |
| 04/09/2009 | WO2009023612A3 Ball seat having ball support member |
| 04/09/2009 | US20090090510 Well bore fluid redistribution system |
| 04/09/2009 | US20090090501 Remotely controllable wellbore valve system |
| 04/09/2009 | CA2641707A1 Vavle apparatus |
| 04/08/2009 | CN201218091Y Oil well automatic layer regulation and allocation device |