| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 03/04/2014 | US8662178 Responsively activated wellbore stimulation assemblies and methods of using the same |
| 03/04/2014 | US8662162 Segmented collapsible ball seat allowing ball recovery |
| 02/27/2014 | WO2014031714A1 Apparatus for creating bidirectional rotary force or motion in a downhole device and method of using same |
| 02/27/2014 | WO2014031120A1 Latch body components having multiple functions, and drilling head assembly incorporating same |
| 02/27/2014 | WO2014031096A1 Stress reactive valve |
| 02/27/2014 | US20140054050 Gas Fracture Injection to Overcome Retrograde Condensation in Gas Wells |
| 02/27/2014 | US20140054045 Smart downhole control |
| 02/27/2014 | US20140054043 Resilient Foam Debris Barrier |
| 02/27/2014 | US20140054041 Apparatus for creating bidirectional rotary force or motion in a downhole device and method of using same |
| 02/27/2014 | US20140054036 Apparatus and Method for Drilling a Wellbore, Setting a Liner and Cementing the Wellbore During a Single Trip |
| 02/27/2014 | CA2877113A1 Latch body components having multiple functions, and drilling head assembly incorporating same |
| 02/26/2014 | EP2699761A2 Ball valve safety plug |
| 02/26/2014 | CN203452729U Anti-backflow backwash valve |
| 02/26/2014 | CN203452728U Split type water exploring and discharging diaphragm valve |
| 02/26/2014 | CN203452727U Integrated injection and extraction well head device |
| 02/26/2014 | CN103603962A Plunger-type throttle valve |
| 02/26/2014 | CN103603631A Pulling fracture type automatic grouting valve for supporting rod |
| 02/26/2014 | CN103603630A 弹簧式自动灌浆阀 Automatic filling valve spring |
| 02/26/2014 | CN103603629A Abrasion-resisting oil outlet tee joint with axial alloy column |
| 02/26/2014 | CN103603627A Shear pin type automatic grout valve |
| 02/26/2014 | CN101595274B System and method for facilitating downhole operations |
| 02/25/2014 | US8657018 Circulating sub |
| 02/25/2014 | US8657017 Method and apparatus for autonomous downhole fluid selection with pathway dependent resistance system |
| 02/25/2014 | US8657016 Adjustable flow control device |
| 02/25/2014 | US8657015 Intelligent completion system for extended reach drilling wells |
| 02/25/2014 | US8657010 Downhole flow device with erosion resistant and pressure assisted metal seal |
| 02/25/2014 | CA2723064C Drilling and hole enlargement device |
| 02/20/2014 | WO2014028795A2 Automated relief valve control system and method |
| 02/20/2014 | WO2014028365A2 System and method for producing through a multi bore tubing hanger to a subsea manifold without bop modifications |
| 02/20/2014 | WO2014004144A3 System and method for servicing a wellbore |
| 02/20/2014 | US20140048282 Method and apparatus for autonomous downhole fluid selection with pathway dependent resistance system |
| 02/20/2014 | US20140048281 Pressure Activated Down Hole Systems and Methods |
| 02/20/2014 | US20140048280 Method and apparatus for controlling fluid flow in an autonomous valve using a sticky switch |
| 02/20/2014 | US20140048278 Subsea well assembly and associated method |
| 02/20/2014 | US20140048271 Sliding sleeve valve and method for fluid treating a subterranean formation |
| 02/20/2014 | US20140048263 Pressure Activated Down Hole Systems and Methods |
| 02/20/2014 | US20140048256 Downhole Tester Valve Having Rapid Charging Capabilities and Method for Use Thereof |
| 02/20/2014 | US20140048250 Valve with shuttle |
| 02/20/2014 | US20140048158 Automated relief valve control system and method |
| 02/19/2014 | EP2697479A1 Safety valve with electrical actuator and tubing pressure balancing |
| 02/19/2014 | EP2697474A2 Pressure equalization apparatus and associated systems and methods |
| 02/19/2014 | CN203441487U Pre-arranged pore plate elbow of Christmas tree |
| 02/19/2014 | CN203441452U Underground safety control device of thermal production well |
| 02/19/2014 | CN203441441U Automatic control recoverer for casing gas of oil pumping well |
| 02/19/2014 | CN203441435U Steam distributing valve with capability of ball injection for twice |
| 02/19/2014 | CN203441434U Oil field oil layer protecting oil well tubular column check valve |
| 02/19/2014 | CN203441433U Underground safety valve heat insulation sheath |
| 02/19/2014 | CN203441432U Oil well anti-theft sampling valve |
| 02/19/2014 | CN203441431U Christmas tree gate antitheft device |
| 02/19/2014 | CN103590800A Multi-level pitch fracturing sliding sleeve capable of fishing ball seats |
| 02/19/2014 | CN103590784A Blowout control leakproof wellhead safety device |
| 02/19/2014 | CN102305055B Air foam flooding shaft bottom foaming process pipe column |
| 02/19/2014 | CN102296939B Automatic pressure-balancing expansion-catch integrated expandable tube tool and use method thereof |
| 02/18/2014 | US8651192 Coiled tubing bottom hole assembly with packer and anchor assembly |
| 02/18/2014 | US8651189 Blowout recovery valve |
| 02/18/2014 | US8651188 Gas lift barrier valve |
| 02/13/2014 | WO2014025797A1 Switchable fluid circulation tool |
| 02/13/2014 | WO2014025338A1 Mechanically adjustable flow control assembly |
| 02/13/2014 | WO2014022940A1 Swing chamber pump (scp) |
| 02/13/2014 | US20140041876 Downhole Tools and Methods for Selectively Accessing a Tubular Annulus of a Wellbore |
| 02/13/2014 | US20140041863 Dual barrier side pocket mandrel with gauge |
| 02/13/2014 | US20140041861 Hydraulic Position Indicator System |
| 02/12/2014 | EP2694776A2 Method and apparatus for controlling fluid flow in an autonomous valve using a sticky switch |
| 02/12/2014 | CN203430480U Blocking ball and seat assembly |
| 02/12/2014 | CN203430479U Anti-dropping by-pass valve |
| 02/12/2014 | CN203430478U Blowout control safety valve at opening of rod-pumped well |
| 02/12/2014 | CN203430477U Well mouth gate lead screw protecting device |
| 02/12/2014 | CN203430476U Well fluid backflow control valve of pumping unit |
| 02/12/2014 | CN103573223A Automatic airlock eliminating device of electric submersible pump |
| 02/12/2014 | CN103573215A Opening tool for openable sliding sleeve |
| 02/12/2014 | CN103573214A Circulation bottom valve which works with pressure |
| 02/12/2014 | CN103573213A Underground instantaneous boosting tool and method |
| 02/12/2014 | CN103573194A Production string optimization device for oil well in case of electric submersible pump gas-locking |
| 02/11/2014 | US8646533 Mechanical sliding sleeve |
| 02/11/2014 | US8646532 Valve, valving device and method |
| 02/11/2014 | US8646531 Tubular actuator, system and method |
| 02/11/2014 | US8646523 Method and materials for proppant flow control with telescoping flow conduit technology |
| 02/06/2014 | WO2014022121A1 Telemetric chemical injection assembly |
| 02/06/2014 | WO2014022105A1 Methods and systems for treating a wellbore |
| 02/06/2014 | WO2014021899A1 Method and apparatus for remote zonal stimulation with fluid loss device |
| 02/06/2014 | WO2014021893A1 Downhole flow control using porous material |
| 02/06/2014 | WO2014021889A1 Remote activated deflector |
| 02/06/2014 | WO2014021816A1 Stacked piston safety valves and related methods |
| 02/06/2014 | WO2014019154A1 Well flushing valve |
| 02/06/2014 | WO2013165643A3 Delayed activation activatable stimulation assembly |
| 02/06/2014 | WO2013148007A3 Activation-indicating wellbore stimulation assemblies and methods of using the same |
| 02/06/2014 | US20140034330 Systems and methods for flow reduction or isolation in a wellbore |
| 02/06/2014 | US20140034326 Compliant Dart-Style Reverse-Flow Check Valve |
| 02/06/2014 | US20140034325 Integral Multiple Stage Safety Valves |
| 02/06/2014 | US20140034324 Downhole flow control using porous material |
| 02/06/2014 | US20140034319 Method and Wellbore Servicing Apparatus for Production Completion of an Oil and Gas Well |
| 02/06/2014 | US20140034310 Multi-zone cemented fracturing system |
| 02/06/2014 | US20140034308 Method and apparatus for remote zonal stimulation with fluid loss device |
| 02/06/2014 | US20140034299 Downhole Apparatus Having a Rotating Valve Member |
| 02/06/2014 | US20140034291 Method of and apparatus for completing a well |
| 02/06/2014 | CA2876217A1 Methods and systems for treating a wellbore |
| 02/05/2014 | CN203420672U Hydraulic type downhole stratification seeking and separating water switch |
| 02/05/2014 | CN203420671U Oil outlet three-way joint for oil field |
| 02/05/2014 | CN203420670U Casing gas pressure relief and delivery device |
| 02/05/2014 | CN203420669U Novel well mouth gate theft connection prevention device |