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)
04/2012
04/19/2012US20120090852 Apparatus and method for compensating for pressure changes within an isolated annular space of a wellbore
04/19/2012US20120090851 Bailer stimulation production unit
04/19/2012US20120090850 Apparatuses and methods for closing and reopening a pipe
04/19/2012US20120090849 Hydraulic disconnect
04/19/2012US20120090847 Tools and Methods for Use in Completion of a Wellbore
04/19/2012CA2814370A1 Lift-gas optimization with choke control
04/18/2012EP2440741A2 Seat apparatus and method
04/18/2012CN202194620U 一种便于拆装的单向止回阀 An easy way check valve disassembly
04/18/2012CN102418497A Spring sheet type pressure release valve
04/18/2012CN102418496A 自衡式井下全通径单流阀 Since the value downhole valve full bore single-stream
04/18/2012CN102418495A 一种欠平衡井下套管阀阀板及其加工方法 A balance downhole casing valve plate and method of processing owe
04/17/2012US8157017 Method and apparatus for injecting fluid in a wellbore
04/17/2012US8157016 Fluid metering device and method for well tool
04/17/2012CA2664977C Slickline power control interface
04/17/2012CA2596408C Flow regulator for use in a subterranean well
04/15/2012CA2755609A1 Downhole extending ports
04/12/2012WO2012048144A2 Downhole tools and methods for selectively accessing a tubular annulus of a wellbore
04/12/2012WO2012047863A2 Remotely controlled apparatus for downhole applications and related methods
04/12/2012WO2012047847A1 Status indicators for use in earth-boring tools having expandable members and methods of making and using such status indicators and earth-boring tools
04/12/2012WO2012047837A2 Remotely controlled apparatus for downhole applications, components for such apparatus, remote status indication devices for such apparatus, and related methods
04/12/2012WO2012047475A2 Barrier valve hydraulic operator with compound valve opening force feature
04/12/2012WO2012045165A1 Actuation dart for wellbore operations, wellbore treatment apparatus and method
04/12/2012WO2012045156A1 Wireline conveyed apparatus for wellbore fluid treatment
04/12/2012WO2012009098A3 Ball seat having collapsible helical seat
04/12/2012WO2012006344A3 Dual-flow valve and swivel
04/12/2012WO2012001671A3 Flow control valve for polymer solutions
04/12/2012US20120085548 Downhole Tools and Methods for Selectively Accessing a Tubular Annulus of a Wellbore
04/12/2012US20120085543 Backup Wellhead Blowout Prevention System and Method
04/12/2012US20120085542 Barrier Valve Hydraulic Operator with Compound valve Opening Force Feature
04/12/2012CA2813690A1 Wireline conveyed apparatus for wellbore fluid treatment
04/12/2012CA2813645A1 Actuation dart for wellbore operations, wellbore treatment apparatus and method
04/12/2012CA2813620A1 Remotely controlled apparatus for downhole applications and related methods
04/12/2012CA2813618A1 Status indicators for use in earth-boring tools having expandable members and methods of making and using such status indicators and earth-boring tools
04/12/2012CA2813611A1 Remotely controlled apparatus for downhole applications, components for such apparatus, remote status indication devices for such apparatus, and related methods
04/11/2012EP1332274B1 Recovery of production fluids from an oil or gas well
04/11/2012CN202187739U 偏心采油井口 Eccentric wellhead
04/11/2012CN102414395A 用于钻探系统的阀系统 A valve system for the drilling system
04/11/2012CN102410009A Controlled-valve placed well-cementing staged-fracturing well-completion string and hydraulically-controlled switch string
04/11/2012CN102409999A 一种井下安全阀强开工具的设计方法 A downhole safety valve strong open design methodology tools
04/11/2012CN102409998A 一种井下安全阀 A downhole safety valve
04/10/2012US8151891 Formation saver sub and method
04/10/2012US8151889 System and method for controlling flow in a wellbore
04/10/2012US8151888 Well tool with combined actuation of multiple valves
04/10/2012US8151887 Lubricator valve
04/10/2012CA2641208C Friction spring release mechanism
04/05/2012WO2011163305A3 Side pocket barrier valve gas lift and mandrel
04/05/2012WO2011159523A3 Method and apparatus for use with an inflow control device
04/05/2012WO2011115710A8 Well assembly with a composite fiber sleeve for an opening
04/05/2012US20120080190 Zonal contact with cementing and fracture treatment in one trip
04/05/2012US20120080188 Multi-position Valves for Fracturing and Sand Control and Associated Completion Methods
04/04/2012CN202181878U 注汽阀门开关工具 Steam injection valve switching tool
04/04/2012CN202181877U 一种定压凡尔及多层分层酸化施工工艺管柱 Seoul where one kind of constant pressure and multi-layered string acidizing process
04/04/2012CN102400667A Sea bottom natural gas hydrate gas lift mining method and device
04/04/2012CN102400662A 可插入式油层防漏失阀 Pluggable oil leak valve failure
04/04/2012CN102400661A 用于连续油管多层压裂作业的平衡阀 Valves for multilayer coiled tubing fracturing jobs
04/04/2012CN102400660A 煤层气井测试装置用井下开关井阀 CBM wells with downhole test device switches wells valve
03/2012
03/30/2012CA2754242A1 Plunger lift and safety valve system
03/29/2012WO2012040419A2 Pressure balanced drilling system and method using the same
03/29/2012WO2012040235A2 Remotely operated isolation valve
03/29/2012WO2012040220A2 Signal operated isolation valve
03/29/2012WO2012040140A2 System and method for controlling flow in a wellbore
03/29/2012WO2012039958A2 Ball-seat apparatus and method
03/29/2012WO2012039620A1 Method and device for hydraulic control of downhole actuators
03/29/2012WO2012037661A1 Apparatus and method for fluid treatment of a well
03/29/2012WO2012037646A1 Delayed opening wellbore tubular port closure
03/29/2012WO2012037645A1 Wellbore frac tool with inflow control
03/29/2012WO2012016276A3 Latching reciprocating valve assembly
03/29/2012US20120073829 Fail Safe Regulator for Deep-Set Safety Valve Having Dual Control Lines
03/29/2012US20120073828 Downhole material delivery
03/29/2012US20120073827 Downhole catcher for an actuating ball and method
03/29/2012US20120073826 Pressure balanced drilling system and method using the same
03/29/2012US20120073799 Apparatus for distributing carbon dioxide with advanced function of adjusting pressure and temperature of carbon dioxide for geologic injection of carbon dioxide
03/29/2012CA2811118A1 Signal operated isolation valve
03/29/2012CA2811117A1 Remotely operated isolation valve
03/29/2012CA2810777A1 Apparatus and method for fluid treatment of a well
03/29/2012CA2810423A1 Delayed opening wellbore tubular port closure
03/29/2012CA2810412A1 Wellbore frac tool with inflow control
03/28/2012EP2434090A2 Fail safe regulator for deep-set safety valve having dual control lines
03/28/2012EP2412918A9 Isolation valve with debris control and flow tube protection
03/28/2012CN202176313U 井下工具开关装置 Downhole tool switching device
03/28/2012CN202176312U 可泄压方钻杆旋塞阀 Kelly cock can relief
03/28/2012CN202176311U 方钻杆或油管旋塞阀开关定位装置 Kelly or tubing plug switch positioning device
03/28/2012CN202176301U 机动采油井封井装置 Motor oil well plugging device
03/28/2012CN102395748A Systems and methods for providing zonal isolation in wells
03/28/2012CN102392619A Oil tube carrying recoverable subsurface safety valve
03/28/2012CN102392618A Pressure difference opened self-locking sliding sleeve
03/28/2012CN102392617A Multistage throttle valve
03/28/2012CN101446184B Pressure-transmittable oil well pump filling valve
03/27/2012US8141648 Multiple-positioning mechanical shifting system and method
03/27/2012US8141642 Fill up and circulation tool and mudsaver valve
03/27/2012US8141641 Backup safety flow control system for concentric drill string
03/24/2012CA2752336A1 Fail safe regulator for deep-set safety valve having dual control lines
03/22/2012WO2012037443A2 Method and apparatus for precise control of wellbore fluid flow
03/22/2012WO2012036774A1 Ball-seat apparatus and method
03/22/2012US20120067595 Remotely operated isolation valve
03/22/2012US20120067594 Signal operated isolation valve
03/22/2012US20120067593 System and method for controlling flow in a wellbore
03/22/2012US20120067592 System for controlling flow of an actuating fluid
03/22/2012US20120067591 Method and apparatus for precise control of wellbore fluid flow
03/22/2012US20120067583 System and method for stimulating multiple production zones in a wellbore with a tubing deployed ball seat
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