Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 34 - Valve arrangements for boreholes or wells
Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685)
06/2012
06/13/2012CN202273649U 强制式自动灌浆单流阀 Forced automatic filling check valve
06/13/2012CN202273648U 油井安全憋压稳压装置 Well hold pressure regulator device security
06/13/2012CN202273647U 不停产可换井口单流阀装置 Discontinued not interchangeable single wellhead valve device
06/13/2012CN202273646U 一种暗杆式闸阀 A concealed valve rod
06/13/2012CN202273645U 一种稳流定压阀 One kind of steady flow constant pressure valve
06/13/2012CN102493785A Automatic-control casing valve
06/13/2012CN102493784A Drillable ball injection sliding sleeve for oil-gas well staged fracturing
06/13/2012CN102493783A Safety device of gas-injection oil-extraction well opening
06/13/2012CA2761477A1 System and method for operating multiple valves
06/12/2012US8196679 Expandable reamers for subterranean drilling and related methods
06/12/2012US8196668 Method and apparatus for completing a well
06/12/2012US8196664 Actuating mechanism
06/12/2012US8196649 Thru diverter wellhead with direct connecting downhole control
06/12/2012CA2629390C Flow switchable check valve
06/07/2012WO2012074607A1 Automatic bypass for esp pump suction deployed in a pbr in tubing
06/07/2012WO2012047475A3 Barrier valve hydraulic operator with compound valve opening force feature
06/07/2012WO2011137112A3 Downhole barrier device
06/07/2012WO2011100748A3 Unlimited downhole fracture zone system
06/07/2012US20120138311 Method and Apparatus for Single-Trip Time Progressive Wellbore Treatment
06/07/2012US20120138310 Stackable multi-barrier system and method
06/07/2012US20120138309 Stackable multi-barrier system and method
06/07/2012US20120138305 Hydraulic control system for actuating downhole tools
06/07/2012US20120138304 Device for directing the flow of a fluid using a pressure switch
06/06/2012EP2460973A2 Hydraulic control system for actuating downhole tools
06/06/2012EP2156009B1 Improved activation device
06/06/2012CN202266251U Spring type sliding sleeve opening tool
06/06/2012CN202266250U A ball cage assembly structure of an intelligent sliding sleeve opening tool
06/06/2012CN202266240U 井下压差式多次循环阀装置 Downhole pressure-valve device multiple cycles
06/06/2012CN202266239U 热采井口专用单流阀 Special single thermal recovery wellhead valve
06/06/2012CN202266231U 用于自膨胀封隔器的胶筒辅助承压装置 For self-expandable packer cones auxiliary pressure device
06/06/2012CN101672174B Energy-saving uninterrupted non-rod oil pumping device
06/05/2012US8191634 Magnetic flapper shock absorber
06/05/2012US8191633 Degradable downhole check valve
06/05/2012US8191629 Pressure equalising devices
06/02/2012CA2724161A1 Dump valve
05/2012
05/31/2012WO2012071194A2 Eccentric safety valve
05/31/2012WO2012069634A1 Downhole punch component
05/31/2012WO2012068624A1 Valve apparatus
05/31/2012WO2012040419A3 Pressure balanced drilling system and method using the same
05/31/2012WO2012037443A3 Method and apparatus for precise control of wellbore fluid flow
05/31/2012WO2011139399A3 Tunable floating seal insert
05/31/2012US20120132442 Control of fluid flow in oil wells
05/31/2012US20120132438 Downhole tool and method
05/31/2012US20120132429 downhole device
05/31/2012US20120132428 Bi-stable valve
05/31/2012CA2818906A1 Valve apparatus
05/30/2012EP2458139A1 Downhole valve
05/30/2012CN202250058U Short-time pressure control formation testing process pipe string
05/30/2012CN202250010U Injection-production integrated double-tube thermal recovery wellhead device
05/30/2012CN202249996U Adjustable concentric distributor of underground water
05/30/2012CN202249995U Grinding-wheel type regulating valve of inlaid anti-backflow device
05/30/2012CN202249949U External-pressure opening type reverse circulation valve
05/30/2012CN202249948U Reverse circulation valve
05/30/2012CN202249947U Subsurface safety valve
05/30/2012CN202249946U Intelligent float valve
05/30/2012CN202249945U Self-locking type hydraulic oil drain device
05/30/2012CN202249944U Leak stopping joint
05/30/2012CN202249943U Rail-mounted underground switching valve
05/30/2012CN202249942U Oil-water-well casing swabbing tool
05/30/2012CN202249941U Layering acidification drain valve
05/30/2012CN202249940U Underground hydraulic-control mud one-way valve
05/30/2012CN202249939U Anti-theft sleeve gate for oil well
05/30/2012CN202249938U Deviation prevention steam injection regulating and controlling valve of thickened oil thermal production well
05/30/2012CN202249937U Oil well casing wellhead valve
05/30/2012CN202249936U Multifunctional oil gas leakage protection device
05/30/2012CN202249935U Oil well low pressure sleeve gas discharge device
05/30/2012CN202249934U Oil well sampling valve anti-theft device
05/30/2012CN202249933U Sound source control valve of wellhead connector
05/30/2012CN202249932U Hot tapping device for oilfield gate valve
05/30/2012CN202249931U Double-sealed emergency rush installing stopcock
05/30/2012CN202249921U Expanding type packer capable of unpacking stepwise
05/30/2012CN202249867U Oil draining anchoring device of oil pipe
05/30/2012CN102482937A 用于控制井眼进水的设备和方法 Device and method for controlling borehole water
05/30/2012CN102482929A 井下装置 Downhole device
05/30/2012CN102477858A Recovery device of well casing exhaust gas
05/30/2012CN101539018B Deep seafloor sampling device
05/29/2012US8186444 Flow control valve platform
05/29/2012US8186440 Fluid injection device
05/29/2012CA2483244C Drill string shutoff valve
05/24/2012WO2012067786A2 Plug and method of unplugging a seat
05/24/2012WO2012065259A1 Kobe sub, wellbore tubing string apparatus and method
05/24/2012US20120125629 Downhole tool
05/24/2012US20120125628 Control apparatus for downhole valves
05/24/2012US20120125627 Sleeve valve
05/24/2012US20120125626 Method and apparatus for stimulating production in a wellbore
05/24/2012US20120125621 Bellows valve
05/24/2012US20120125597 Eccentric safety valve
05/24/2012CA2818307A1 Valve assembly
05/24/2012CA2817777A1 Kobe sub, wellbore tubing string apparatus and method
05/24/2012CA2816744A1 Plug and method of unplugging a seat
05/23/2012EP2455580A2 Control apparatus for downhole valves
05/23/2012EP2455579A1 Gas lift nozzle valve
05/23/2012CN202228072U Composite sampling device for oil well
05/23/2012CN202228055U Novel anti-block oil nozzle
05/23/2012CN202228043U Safety valve in pipes
05/23/2012CN202228042U Valve control base body
05/23/2012CN202228037U Watering-type wellhead controller
05/23/2012CN102472395A Tubular valve system and method
05/23/2012CN102472091A 具有一个或更多个可收回型元件的流动控制装置 Having one or more flow recoverable type element control means
05/23/2012CN102472089A 用于间歇气举的系统和方法 System and method for intermittent gas lift
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