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