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)
11/2012
11/14/2012EP2521838A1 Autonomous inflow control device and methods for using same
11/14/2012EP2521835A2 Rotating continuous flow sub
11/14/2012CN202531164U Antitheft and antifreezing sampling device
11/14/2012CN202531153U Coal bed gas well choosing device
11/14/2012CN202531137U Automatic measuring, regulating and monitoring separated layer injection water distributor
11/14/2012CN202531108U Metering station multi-way valve electric actuator protection device
11/14/2012CN202531107U Sliding bush-type flap float valve
11/14/2012CN202531106U Screw pump well-flushing valve
11/14/2012CN202531105U Switch capable of realizing downhole automatic control
11/14/2012CN202531104U Drilling tool float valve with long service life
11/14/2012CN202531103U Recoverable casing blockage valve
11/14/2012CN202531102U Sampling gate capable of preventing stealing oil
11/14/2012CN202531101U Gas well head pressure reduction startup device
11/14/2012CN202531100U Hydraulic controlled check valve
11/14/2012CN202531099U Airtight kelly cock valve
11/14/2012CN202531044U Anti-overflow joint for drilling washover operation
11/14/2012CN1648465B System and method for offshore production with well control
11/14/2012CN102782249A Flow control device and flow control method
11/14/2012CN102782246A Flow control arrangement and method
11/14/2012CN102777163A Method for opening sand-blasting hole of horizontal well by coiled tubing
11/14/2012CN102777144A Hydraulic control cycling switch
11/14/2012CN101806200B Interlaminar multistep control valve used for well completion
11/14/2012CN101535593B An underwater apparatus for operating underwater equipment
11/14/2012CN101349146B Deep water hurricane-proof valve
11/13/2012US8307902 Downhole flow control tool and method
11/13/2012US8307893 Method of improving waterflood performance using barrier fractures and inflow control devices
11/13/2012CA2559006C Expander for expanding a tubular element
11/08/2012WO2012151354A1 Continuous fluid circulation valve for well drilling
11/08/2012WO2012151036A2 A device for directing the flow of a fluid using a centrifugal switch
11/08/2012WO2012149638A1 Sliding sleeve valve and method for fluid treating a subterranean formation
11/08/2012WO2012091984A3 Dissolvable barrier for downhole use and method thereof
11/08/2012US20120279723 Downhole Tool
11/08/2012US20120279722 Tubular seating system and method of seating a plug
11/08/2012US20120279717 Controlled aperture ball drop
11/08/2012CA2834210A1 Sliding sleeve valve and method for fluid treating a subterranean formation
11/08/2012CA2831601A1 A device for directing the flow of a fluid using a centrifugal switch
11/07/2012CN202520294U High-temperature and high-pressure thermal recovery steam injection pipeline decompression device for oil field
11/07/2012CN202520284U Gravel filling backwashing valve
11/07/2012CN202520283U Check valve for oil well
11/07/2012CN202520282U Drilling rig control valve
11/07/2012CN202520281U Watering flow-limiting valve of oil production well
11/07/2012CN202520280U Anti-freezing sampling valve for thickened oil wellhead
11/07/2012CN202520279U Check valve
11/07/2012CN202520278U Burglary-proof anti-freezing sampling valve for oil well
11/07/2012CN202520277U Casing check valve
11/07/2012CN202520257U Device for replacing main control valve of christmas tree without killing well
11/07/2012CN102767347A Bidirectional blowout preventing valve
11/07/2012CN101709630B Integrated control module for safe shutdown system of wellhead
11/06/2012US8302692 Valve for a sand slurry system
11/06/2012US8302684 Controlling the flow of a multiphase fluid from a well
11/02/2012CA2776069A1 Downhole tool
11/01/2012WO2012149431A2 Casing relief valve
11/01/2012WO2012149426A2 Annular pressure release sub
11/01/2012WO2012149418A2 Collapse sensing check valve
11/01/2012WO2012148993A2 Subsea dispersant injection systems and methods
11/01/2012WO2012148840A2 Weighted pressure relief valve
11/01/2012WO2012148839A2 Pressure relief valve
11/01/2012WO2012148749A2 Load balancing spherical diameter single seat ball system
11/01/2012WO2012148640A2 Controlled production and injection
11/01/2012WO2012106129A3 Resettable pressure cycle-operated production valve and method
11/01/2012WO2012082492A3 Controlling flow between a wellbore and an earth formation
11/01/2012WO2011110816A3 Well barrier
11/01/2012US20120273228 Integrated Choke Manifold System for Use in A Well Application
11/01/2012US20120273227 Casing relief valve
11/01/2012US20120273226 Annular pressure release sub
11/01/2012US20120273225 Collapse sensing check valve
11/01/2012US20120273224 Electronic Control System for a Downhole Tool
11/01/2012US20120273223 Load balancing spherical diameter single seat ball system
11/01/2012US20120273220 Pressure relief valve
11/01/2012US20120273214 Connection System for Subsea Flow Interface Equipment
11/01/2012US20120273210 Processes and systems for treating oil and gas wells
11/01/2012US20120273209 Weghted pressure relief valve
11/01/2012US20120273198 Ball and dart launcher with parallel axis release
11/01/2012CA2834360A1 Annular relief valve
11/01/2012CA2834294A1 Controlled production and injection
11/01/2012CA2834293A1 Casing relief valve
11/01/2012CA2834230A1 Annular pressure release sub
10/2012
10/31/2012EP2516856A2 Methods of use for a positive displacement pump having an externally assisted valve
10/31/2012EP2516796A2 Pressure equalizing a ball valve through an upper seal bypass
10/31/2012CN202510109U Pressing device of oil-water well
10/31/2012CN202510108U Oil well production back-pressure simulator
10/31/2012CN202510093U Oil well casing gas recycling device
10/31/2012CN202510089U Intelligent well control system
10/31/2012CN202510088U Rotary type oil draining device
10/31/2012CN202510087U Retrievable subsurface safety valve
10/31/2012CN202510086U Combined type check valve
10/31/2012CN202510082U Uniflow plug
10/31/2012CN102758600A Voice control differential pressure balance type switch for horizontal well
10/31/2012CN102758599A Separate mining and combined mining pipe column for sieve pipe well completion horizontal well and mining method thereof
10/31/2012CN101598010B Anti-pollution back pressure valve tool
10/30/2012US8297367 Mechanism for activating a plurality of downhole devices
10/30/2012CA2510214C Flow-biased sequencing valve
10/29/2012CA2739981A1 Electronic control system for a downhole tool
10/26/2012WO2012145735A1 Interventionless operation of downhole tool
10/26/2012WO2012143775A2 Ball valve safety plug
10/26/2012WO2012095196A3 Autonomous valve
10/26/2012WO2012078307A3 Stackable multi-barrier system and method
10/25/2012US20120267119 Interventionless operation of downhole tool
10/25/2012US20120267094 Apparatus and Method for Recovering Fluids from a Well and/or Injecting Fluids into a Well
10/24/2012EP2513417A1 Downhole sub with hydraulically actuable sleeve valve
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