| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
|---|
| 12/15/2011 | WO2011156368A2 Ball-seat apparatus and method |
| 12/15/2011 | WO2011156219A2 Method of determining position of a valve |
| 12/15/2011 | WO2011153621A2 Rotating flow control diverter |
| 12/15/2011 | WO2011092660A3 Mechanical tube wave sources and methods of use for liquid filled boreholes |
| 12/15/2011 | US20110303420 Method and apparatus for use with an inflow control device |
| 12/15/2011 | US20110303419 Installation of lines in high temperature wellbore environments |
| 12/15/2011 | US20110303418 Method and apparatus for reducing impact force in a ball-seat assembly |
| 12/15/2011 | CA2801788A1 Rotating flow control diverter |
| 12/14/2011 | CN202073532U 转角式闸板封堵阀门 Corner-type gate valve closure |
| 12/14/2011 | CN202073531U 油井新型防盗取样阀 The new sampling valve oil theft |
| 12/14/2011 | CN102278091A 液压滑套 Hydraulic sleeve |
| 12/14/2011 | CN101498205B 水平井洗井阀堵塞装置 Horizontal wells flushing valve blockage device |
| 12/14/2011 | CN101302927B 一种计量控制阀及应用该计量控制阀的油井质量在线计量装置 A measure of control valves and oil quality online application metering device which controls the metering valve |
| 12/13/2011 | US8074966 Drive device |
| 12/13/2011 | US8074721 Method for controlling a downhole tool with a linearly actuated hydraulic switch |
| 12/13/2011 | US8074719 Flow control in a well bore |
| 12/13/2011 | US8074718 Ball seat sub |
| 12/13/2011 | US8074716 Tension-activated fluid bypass device and associated method |
| 12/08/2011 | WO2011151730A2 Apparatus for emergency electrodynamic capping of pipes and wells |
| 12/08/2011 | WO2011151446A2 System and method for passing matter in a flow passage |
| 12/08/2011 | WO2011127411A3 Fluid displacement methods and apparatus for hydrocarbons in subsea production tubing |
| 12/08/2011 | US20110297443 Expandable reamer apparatus and related methods |
| 12/08/2011 | US20110297394 Magnetorheological blowout preventer |
| 12/08/2011 | US20110297393 Intelligent completion system for extended reach drilling wells |
| 12/08/2011 | US20110297392 Sub-sea chemical injection metering valve |
| 12/08/2011 | US20110297385 Variable flow resistance system with circulation inducing structure therein to variably resist flow in a subterranean well |
| 12/08/2011 | US20110297384 Variable flow resistance system for use in a subterranean well |
| 12/08/2011 | CA2801127A1 Gate valve, method for returned drilling mud pressure control and/or well killing, and uses of a gate valve |
| 12/08/2011 | CA2801124A1 System and method for passing matter in a flow passage |
| 12/07/2011 | EP2391798A1 Apparatus and method |
| 12/07/2011 | CN202064894U 新型泄油装置 The new drain system |
| 12/07/2011 | CN202064893U 一种套管阀门开启关闭装置 One kind of casing open and close the valve device |
| 12/07/2011 | CN202064892U 单向定压阀 Constant pressure check valve |
| 12/07/2011 | CN202064891U 井口安全防盗旋塞阀 Wellhead security alarm cock |
| 12/07/2011 | CN202064890U 直读式防冻堵的定压放气阀 Direct-reading antifreeze blocking constant pressure release valve |
| 12/07/2011 | CN202064889U 一种采油采气可调针式节流阀 One kind of oil gas production adjustable throttle needle |
| 12/06/2011 | US8069926 Method of controlling flow through a drill string using a valve positioned therein |
| 12/06/2011 | CA2583477C Expansion pig |
| 12/06/2011 | CA2547253C Downhole ball circulation tool |
| 12/04/2011 | CA2742024A1 Pressure reversing valve assembly for a down-the-hole percussive drilling apparatus |
| 12/01/2011 | WO2011150048A2 Intelligent completion system for extended reach drilling wells |
| 12/01/2011 | WO2011146983A1 Hydraulic fracturing |
| 12/01/2011 | WO2011130505A3 Apparatus and method for selective flow control |
| 12/01/2011 | WO2011115710A3 Well assembly with a composite fiber sleeve for an opening |
| 12/01/2011 | US20110290504 Control system |
| 12/01/2011 | US20110290500 Apparatus and Method for Recovering Fluids From a Well and/or Injecting Fluids Into a Well |
| 12/01/2011 | US20110290496 Gasless Pilot Accumulator |
| 12/01/2011 | US20110290486 Well Treatment Device, Method, and System |
| 12/01/2011 | CA2792642A1 Downhole gas release apparatus |
| 11/30/2011 | CN202055803U 井下分层连接阀及其连接阀开关 Underground hierarchical connection valve and its connection valve switch |
| 11/30/2011 | CN202055802U 闸门替代手轮 Alternative gate handwheel |
| 11/30/2011 | CN202055801U 采油井口组合装置 Wellhead combination device |
| 11/30/2011 | CN202055800U 单向自动井口阀门 Unidirectional automatic wellhead valve |
| 11/30/2011 | CN102261231A 一种多次开关滑套装置 One kind of multiple switching sleeve device |
| 11/29/2011 | US8066076 Connection system for subsea flow interface equipment |
| 11/29/2011 | US8066075 Completion suspension valve system |
| 11/29/2011 | US8066074 Systems and methods for mitigating annular pressure buildup in an oil or gas well |
| 11/29/2011 | US8066067 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 11/29/2011 | CA2667666C An underwater apparatus for operating underwater equipment |
| 11/29/2011 | CA2653254C Mechanical sliding sleeve |
| 11/29/2011 | CA2642111C Method and system for controlling a downhole flow control device |
| 11/29/2011 | CA2530521C Downhole data communication |
| 11/24/2011 | WO2011146210A1 Mechanism for activating a plurality of downhole devices |
| 11/24/2011 | WO2011123617A3 Improved mud saver valve and method of operation of same |
| 11/24/2011 | US20110284241 Overriding a Primary Control Subsystem Of A Downhole Tool |
| 11/24/2011 | US20110284240 Mechanism for activating a plurality of downhole devices |
| 11/24/2011 | US20110284233 Hydraulic Actuation of a Downhole Tool Assembly |
| 11/24/2011 | US20110284232 Disposable Downhole Tool |
| 11/24/2011 | US20110284224 Cutting dart and method of using the cutting dart |
| 11/23/2011 | EP2205822B1 Object manoeuvring apparatus |
| 11/23/2011 | EP1529150B1 Electric power control for sickline operations in wellbores |
| 11/23/2011 | CN202047791U Bidirectional overpressure protective device for oil well and oil jacket |
| 11/23/2011 | CN202047790U Steam injection valve |
| 11/23/2011 | CN202047789U Reservoir isolating valve |
| 11/23/2011 | CN202047788U Automatic pressure release valve |
| 11/23/2011 | CN202047787U Theft preventing valve |
| 11/23/2011 | CN202047781U Novel two-way blowout preventing valve |
| 11/23/2011 | CN202047775U Clamping hoop with semicircular guard ring |
| 11/23/2011 | CN102251754A Blowout control tubing head with non-well-killing valve replacement |
| 11/23/2011 | CN101799008B Oil well pump fuel charging valve capable of transmitting pressure |
| 11/23/2011 | CN101349148B Double-feedback fluid-control one-way throttle velocity modulation composite valve |
| 11/22/2011 | CA2429459C Adjustable stabiliser for directional drilling |
| 11/17/2011 | WO2011143034A1 Method and system for well access to subterranean formations |
| 11/17/2011 | WO2011119728A3 System, assembly and method for port control |
| 11/17/2011 | WO2011119448A3 Remotely operated isolation valve |
| 11/17/2011 | WO2009085603A3 Controller for hydraulically operated downhole tool |
| 11/17/2011 | US20110278021 Wellhead Control Line Deployment |
| 11/17/2011 | US20110278017 Sliding sleeve sub and method and apparatus for wellbore fluid treatment |
| 11/17/2011 | US20110278016 Valve, valving device and method |
| 11/17/2011 | US20110278010 Method and apparatus for wellbore fluid treatment |
| 11/17/2011 | US20110277987 Bottom set downhole plug |
| 11/17/2011 | US20110277985 Drive sleeve and sealing mechanism for non-rising stem gate valve |
| 11/17/2011 | CA2798806A1 Method and system for well access to subterranean formations |
| 11/16/2011 | EP2386717A1 Choke Assembly |
| 11/16/2011 | EP2386716A1 Choke assembly |
| 11/16/2011 | CN202039829U Stable-current right angle type regulator for water injection well |
| 11/16/2011 | CN202039826U Water mixing regulation-free device |
| 11/16/2011 | CN202039816U Bidirectional back pressure valve |
| 11/16/2011 | CN202039815U High-temperature expansion sluice valve |
| 11/16/2011 | CN202039814U Efficient complete seal gate valve |