Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685)
05/2011
05/19/2011US20110114334 Apparatus and method for activating and deactivating a downhole tool
05/19/2011US20110114333 Casing Annulus Management
05/19/2011US20110114325 Anchor/shifting tool with sequential shift then release functionality
05/19/2011US20110114324 Modular hydraulic operator for a subterranean tool
05/19/2011US20110114321 Open/Close Outlet Internal Hydraulic Device
05/19/2011US20110114310 Downhole formation tester
05/19/2011CA2778720A1 Stage tool for wellbore cementing
05/19/2011CA2778311A1 Downhole progressive pressurization actuated tool and method of using the same
05/19/2011CA2778124A1 Tubular actuator, system and method
05/19/2011CA2771836A1 Hydraulic control system monitoring apparatus and method
05/18/2011EP2322753A2 Expandable reamers for earth boring applications
05/18/2011EP2321493A1 Remote actuation of downhole well tools
05/18/2011CN201835792U Kelly cock valve
05/18/2011CN201835791U Ground check valve of water injection well
05/18/2011CN201835785U Oil-water well device capable of automatically controlling pressure relief and liquid discharge as well as pumping discharged liquid to production pipeline
05/18/2011CN102061904A Automatic grout valve of adjustable pressure difference type
05/17/2011US7942206 In-flow control device utilizing a water sensitive media
05/17/2011US7942198 Aerator for a well water pumping system
05/17/2011CA2620335C Gravity drainage apparatus
05/12/2011WO2011056292A2 Actuation system for well tools
05/12/2011WO2011056163A1 Apparatus & method for running tubulars
05/12/2011WO2011054214A1 Throttle manifold for drilling simulator
05/12/2011WO2011054213A1 High-pressure manifold for drilling simulator
05/12/2011WO2011019559A3 Tubular actuator, system and method
05/12/2011WO2011017424A3 Tubular system with selectively engagable sleeves and method
05/12/2011WO2011009145A3 Tension-activated fluid bypass device
05/12/2011US20110108285 Method and apparatus for a wellbore assembly
05/12/2011US20110108284 Cluster Opening Sleeves for Wellbore Treatment
05/12/2011US20110108279 Self-sealing chemical injection line coupling
05/12/2011US20110108263 Managing Pressurized Fluid in a Downhole Tool
05/11/2011EP2318645A1 A tool using outputs of sensors responsive to signaling
05/11/2011EP2318644A1 Valve for wellbore applications
05/11/2011CN201826810U Double-barrelled watering process combination device
05/11/2011CN201826809U Well head switchgear
05/11/2011CN201826808U Low-shearing flow control valve
05/11/2011CN201826804U Twin-well ocean wellhead assembly
05/11/2011CN201826795U Anti-sulfur oil-gas production wellhead device self-provided with main control valve replacing structure
05/11/2011CN102052057A Pore water pressure orientator
05/11/2011CN101265790B Hydraulic control security valve
05/10/2011US7938189 Pressure protection for a control chamber of a well tool
05/10/2011US7938188 Completion method with telescoping perforation and fracturing tool
05/06/2011CA2716834A1 Cluster opening sleeves for wellbore treatment
05/05/2011WO2011050500A1 Multi-level refined throttle manifold and automatic control system
05/05/2011WO2011050477A1 Plug retainer and method for wellbore fluid treatment
05/05/2011US20110101613 Improved seal
05/05/2011US20110100647 Tubular Actuator, System and Method
05/05/2011US20110100645 Actuation system for well tools
05/05/2011US20110100644 Pipeline tool
05/05/2011US20110100643 Downhole sub with hydraulically actuable sleeve valve
05/05/2011US20110100642 Instrumented tubing and method for determining a contribution to fluid production
05/05/2011US20110100641 Downhole piston pump and method of operation
05/05/2011US20110100640 Drive mechanism
05/05/2011US20110100635 System for drilling under balanced wells
05/05/2011CA2776564A1 Plug retainer and method for wellbore fluid treatment
05/04/2011CN201818279U Anti-splash valve of kelly bar
05/03/2011US7934559 Single cycle dart operated circulation sub
05/03/2011US7934553 Method for controlling placement and flow at multiple gravel pack zones in a wellbore
05/03/2011US7934376 Hydraulic actuation assembly
04/2011
04/28/2011WO2011049970A2 Pressure equalizing a ball valve through an upper seal bypass
04/28/2011WO2010143000A3 Debris removal method and assembly
04/28/2011US20110094752 Control of sub surface safety valves
04/28/2011US20110094749 Purge System
04/27/2011EP2314825A1 Drilling head for reboring a stuck valve
04/27/2011EP2313797A1 Control of sub surface safety valves
04/27/2011CN201810306U Hydrogeological parameter observation instrument used for singly drilling underground
04/27/2011CN201810273U Ultrahigh-pressure normally closed valve for acidification and liquid drainage
04/27/2011CN201810272U Ultrahigh-pressure normally open valve for acidification and liquid drainage
04/27/2011CN201810271U Downhole well opening and closing device for directly reading and storing during coal bed methane testing
04/27/2011CN201810270U Vertical well cementation manifold for ocean oil production
04/27/2011CN201810269U One-way valve for oil well
04/27/2011CN201810268U Non-emptying liquid sampling valve for oil field
04/27/2011CN201810267U Test run faucet locking device
04/27/2011CN201810266U Backflow preventing check valve with low resistance consumption
04/27/2011CN201810265U Hollow rod well-cleaning check valve
04/27/2011CN102031953A Underground position selecting hydraulic decoding method and device of intelligent well
04/27/2011CN102031945A Oil- water well blockage removal method and oil-water well blockage removal system
04/27/2011CN102031944A Two-section nonrising stem flat valve with switch indicator
04/27/2011CN102031943A Integrated four-way rising stem flat valve
04/26/2011CA2624368C Pressure isolation plug for horizontal wellbore and associated methods
04/26/2011CA2597565C One trip cemented expandable monobore liner system and method
04/26/2011CA2493017C Method and apparatus for causing pressure variations in a wellbore
04/21/2011WO2011047163A2 Flapper valve and method
04/21/2011WO2011046682A2 Ball catcher with retention capability
04/21/2011WO2011008639A3 Subterranean valve operated by string relative movement
04/21/2011WO2011008591A3 Tubular valve system and method
04/21/2011US20110088915 Bottom Hole Assembly for Subterranean Operations
04/21/2011US20110088913 Constant environment subsea control system
04/21/2011US20110088912 Downhole hydraulic control line
04/21/2011US20110088908 Flapper valve
04/21/2011US20110088907 Flapper valve and method
04/21/2011US20110088906 Pressure Equalizing a Ball Valve through an Upper Seal Bypass
04/20/2011EP1920133B1 Safety device for an oil well and associated safety installation
04/20/2011EP1093540B1 Method and multi-purpose apparatus for control of fluid in wellbore casing
04/20/2011CN201802364U Adjustable natural gas jet and drainage device
04/20/2011CN201802355U Externally-hanging type oil draining device for large channel
04/20/2011CN201802354U Check type choke seat
04/20/2011CN201802353U Funnel-shaped choke of flowing well
04/20/2011CN201802352U Well mouth anti-backflow nozzle tip of flowing well
04/20/2011CN201802351U Gas/oil guide valve for well workover
04/20/2011CN201802341U Portable high pressure water injection wellhead
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