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)
03/2014
03/26/2014CN103670330A Prearrangement bottom valve for plugging oil field water well water injection pipe column
03/26/2014CN103670329A Tube-in-tube thickened oil steam wellhead device
03/26/2014CN102242621B Negative pressure de-plugging and oil extraction process and device
03/20/2014WO2014043033A1 Multi-piston hydrostatic setting tool with locking feature and pressure balanced pistons
03/20/2014WO2014043031A1 Multi-piston hydrostatic setting tool with locking feature outside actuation chambers for multiple pistons
03/20/2014WO2014042818A1 Fluid flow impedance system
03/20/2014WO2014042657A1 Well tools with semi-permeable barrier for water-swellable material
03/20/2014WO2014042622A1 Composite wellbore ball valve
03/20/2014WO2014042619A1 Resilient downhole flow restrictor
03/20/2014WO2014042541A1 Improvements in, or related to, float valve hold open devices and methods therefor
03/20/2014WO2014041123A1 Drop device
03/20/2014WO2013139601A3 A flow control device and method
03/20/2014US20140076637 Bi-Stable Valve
03/20/2014US20140076579 Gas lift valve with mixed bellows and floating constant volume fluid chamber
03/20/2014US20140076578 Downhole Tool
03/20/2014US20140076560 Wellbore cementing tool having one way flow
03/20/2014US20140076546 Single Trip Multi-Zone Drill Stem Test System
03/19/2014EP2708694A1 Drop device
03/19/2014EP2707570A1 Pressure and flow control in drilling operations
03/19/2014EP2707569A1 Mandrel arrangement and method of operating same
03/19/2014CN203488147U Reverse circulation valve capable of being opened and closed
03/19/2014CN203488146U Reverse circulation valve capable of being opened and closed
03/19/2014CN203488145U High-pressure process protective cover
03/19/2014CN203488144U Adjustable bushing deflation device
03/19/2014CN103649456A Method of reducing deflection through a rod piston in a subsurface safety valve
03/19/2014CN103649455A Apparatus to remotely actuate valves and method thereof
03/18/2014US8672042 Continuous fluid circulation valve for well drilling
03/18/2014US8672036 Wellbore circulation tool and method
03/18/2014US8672035 Downhole tool of high pressure operating cycle capability
03/18/2014CA2821264C Controlling flow of steam into and/or out of a wellbore
03/18/2014CA2721496C Methods and systems for orienting in a bore
03/13/2014WO2014039740A1 Gas lift valve
03/13/2014WO2014039272A1 Expandable fracture plug seat apparatus
03/13/2014WO2014037584A1 Injection device
03/13/2014WO2013103785A3 One trip toe-to-heel gravel pack and liner cementing assembly
03/13/2014WO2013079935A3 Improved wireline drilling system
03/13/2014US20140069655 Downhole shutoff tool
03/13/2014US20140069654 Downhole Tool Incorporating Flapper Assembly
03/13/2014US20140069648 Apparatus and method for isolating flow in a downhole tool assembly
03/13/2014US20140069639 Friction reduction assembly for a downhole tubular, and method of reducing friction
03/13/2014US20140069627 Resilient Downhole Flow Restrictor
03/13/2014CA2838094A1 Multi-stage well isolation and fracturing
03/12/2014EP2705287A1 Sliding sleeve valve and method for fluid treating a subterranean formation
03/12/2014EP2705216A2 A device for directing the flow of a fluid using a centrifugal switch
03/12/2014EP2705212A1 Downhole shifting tool
03/12/2014CN203476301U Shear type pressure action mechanism
03/12/2014CN203476285U Sliding sleeve switch
03/12/2014CN203476284U Valve ball shifting device
03/12/2014CN203476283U Water injection well resistance-meeting-resisting concentric throwing-getting switch
03/12/2014CN103635656A System and method for injecting a treatment fluid into a wellbore and a treatment fluid injection valve
03/12/2014CN103628853A Ball jumping type sliding sleeve device used under well
03/12/2014CN103628839A Blowout preventer for oil field equipment
03/12/2014CN102373900B Staged fracturing well completion method using hydraulic-controlled switch to open/close controllable valves
03/12/2014CN102337864B Safety valve in pipe
03/12/2014CA2838092A1 Multi-stage well isolation and fracturing
03/11/2014US8668018 Selective dart system for actuating downhole tools and methods of using same
03/11/2014US8668016 System and method for servicing a wellbore
03/11/2014US8668015 Dual check valve
03/11/2014US8668014 Subsurface safety valve for high temperature and high pressure wells
03/11/2014US8668013 Plug counter, fracing system and method
03/11/2014US8668012 System and method for servicing a wellbore
03/11/2014US8668008 Atomic battery powered downhole completions assembly
03/11/2014US8668006 Ball seat having ball support member
03/11/2014CA2613628C Valve
03/10/2014CA2825325A1 Cased hole chemical perforator
03/06/2014WO2014036526A2 Multi-purpose fluid conducting swivel assembly
03/06/2014WO2014035830A2 Pressure testing valve and method of using the same
03/06/2014WO2014035384A1 Safety valve with lockout capability and methods of use
03/06/2014WO2014035369A1 Constructed annular safety valve element package
03/06/2014WO2014035252A1 A barrier valve for use in a well completion, a tubular part with a zigzag recess and a method for opening the barrier valve
03/06/2014WO2013079926A3 Drill string check valve
03/06/2014US20140060853 Multi-purpose fluid conducting swivel assembly
03/06/2014US20140060852 Pressure Testing Valve and Method of Using the Same
03/06/2014US20140060846 Downhole casing system
03/06/2014US20140060837 Method and apparatus for treating a well
03/06/2014US20140060813 Expandable fracture plug seat apparatus
03/06/2014US20140060809 Back pressure valve
03/05/2014EP2702239A2 Annular relief valve
03/05/2014EP2702238A2 Subsea safety valve system
03/05/2014EP2702237A2 Load balancing spherical diameter single seat ball system
03/05/2014EP2702236A2 Collapse sensing check valve
03/05/2014EP2702235A2 Casing relief valve
03/05/2014EP2702234A2 Annular pressure release sub
03/05/2014EP2702233A2 Controlled production and injection
03/05/2014CN203463074U Mechanical sliding sleeve switch tool
03/05/2014CN203463073U Sleeve pipe slide sleeve capable of being repeatedly opened and closed
03/05/2014CN203463072U Novel inner ball valve tool
03/05/2014CN203463071U Valve plate structure for underground safety valve
03/05/2014CN203463070U Diverter switch for well washing
03/05/2014CN203463069U Mechanical hydraulic type switchable fracturing slide sleeve
03/05/2014CN203463068U Oil-well bidirectional protective valve and wellhead oil-gas distribution device thereof
03/05/2014CN103615214A Cavity-shell type reverse circulation valve
03/05/2014CN103615213A Multi-well control valve for hydraulic drive well mouth safety control system
03/05/2014CN103615199A Oil extraction processing device for achieving steam injection, oil extraction and temperature-pressure real-time monitoring in shaft of horizontal well with three tubes
03/05/2014CN103614632A Manufacturing method of submarine oil well valve base
03/05/2014CN102720464B Subsurface safety valve
03/05/2014CN102027191B Downhole valve for preventing zonal cross-flow
03/04/2014US8662187 Permanent magnet linear motor actuated safety valve and method
03/04/2014US8662180 Rotational test valve with tension reset
03/04/2014US8662179 Remotely operated production valve and method
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