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)
08/2012
08/23/2012WO2012091829A3 Method and apparatus for controlling fluid flow into a wellbore
08/23/2012WO2011129704A3 Variable orifice device
08/23/2012US20120211243 Method and apparatus for autonomous downhole fluid selection with pathway dependent resistance system
08/23/2012US20120211242 Multi-stage valve actuator
08/23/2012US20120211241 Remotely operated production valve and method
08/22/2012EP2489827A2 Self-boosting, non-elastomeric resilient seal for check valve
08/22/2012EP2489826A1 Testing a solenoid of a directional control valve
08/22/2012CN202391402U Well-head flow stabilizing device for oil and water wells
08/22/2012CN202391384U Remote control device of ground valve for oil and gas production and fracturing
08/22/2012CN202391383U Multistage pressure control system for wellhead safety valve
08/22/2012CN202391382U Wellhead surface safety valve control system
08/22/2012CN202391381U Constant pressure exhaust device for oil well casing
08/22/2012CN202391380U Anti-theft scavenging joint free of emptying pressure at oil production wellhead
08/22/2012CN102644448A Puncture-proof pup joint of throttle valve used for well drilling
08/22/2012CN101705805B Well-head shutoff pressure prevention and casting head gas recovery integrated device
08/22/2012CN101113663B Mechanical water-shutoff construction method of mine hydrophthalmos and plugging apparatus for water-shutoff
08/21/2012US8245788 Cluster opening sleeves for wellbore treatment and method of use
08/21/2012CA2555403C Connection system for subsea flow interface equipment
08/17/2012CA2736199A1 Pulse generator
08/16/2012WO2012109562A2 Flow control device and methods for using same
08/16/2012WO2012109129A2 Partially retrievable safety valve
08/16/2012WO2012106804A1 Wellbore injection system
08/16/2012WO2012082333A3 Intelligent pressure actuated release tool
08/16/2012WO2012078305A3 Stackable multi-barrier system and method
08/16/2012WO2012071194A3 Eccentric safety valve
08/16/2012WO2012039958A3 Ball-seat apparatus and method
08/16/2012US20120205122 Flow control device and methods for using same
08/16/2012US20120205121 System and method for servicing a wellbore
08/16/2012US20120205120 Method for individually servicing a plurality of zones of a subterranean formation
08/16/2012US20120205116 Flapper Valve
08/16/2012US20120205115 Sub surface safety valve
08/16/2012US20120205114 Valve with removable component
08/16/2012US20120205113 Subsurface Safety Valve for High Temperature and High Pressure Wells
08/16/2012CA2825364A1 System and method for servicing a wellbore
08/16/2012CA2825355A1 A method for individually servicing a plurality of zones of a subterranean formation
08/15/2012CN202381088U Nitrogenization needle valve
08/15/2012CN202381064U Dedicated tool integrated with laminating and fracturing
08/15/2012CN202381041U Check valve of flexible seal oil well
08/15/2012CN202381040U Differential pressure type circulating throttle valve
08/15/2012CN202381039U Leaked oil collector for safety valve
08/15/2012CN202381038U Closing-preventing protection device for lead screw type gate valve
08/15/2012CN202381037U Constant-pressure deflating valve for oil well casing
08/15/2012CN202381027U Glass tail plug
08/15/2012CN102635337A Rapid gas production method implemented after coiled tubing is put in gas well
08/15/2012CN102635329A Novel double-seal arrow-shaped check valve
08/14/2012US8240376 Pressure equalising devices
08/09/2012WO2012106350A2 Segmented collapsible ball seat allowing ball recovery
08/09/2012WO2012106129A2 Resettable pressure cycle-operated production valve and method
08/09/2012WO2012064946A3 Magnetically coupled actuation apparatus and method
08/09/2012WO2012010897A3 A safety mechanism for a well, a well comprising the safety mechanism, and related methods
08/09/2012US20120199367 Partially Retrievable Safety Valve
08/09/2012US20120199366 Actuator and method
08/09/2012US20120199365 Chemical injection regulation mechanism
08/09/2012US20120199364 Resettable pressure cycle-operated production valve and method
08/09/2012US20120199363 Downhole tool actuation
08/09/2012CA2824767A1 Segmented collapsible ball seat allowing ball recovery
08/08/2012EP2484863A2 Novel activating mechanism for controlling the operation of a downhole tool
08/08/2012EP2484862A2 Indexing sleeve for single-trip, multi-stage fracing
08/08/2012CN202370500U Single-well wellhead yield accounting device
08/08/2012CN202370492U Gas lift exploitation device for submarine natural gas hydrates
08/08/2012CN202370481U Grouting blowout prevention device used in high pressure top water drilling
08/08/2012CN202370480U Underground pressure test well opening valve tool suitable for annulus pressurization
08/08/2012CN202370479U Automatic oil well sleeve pressure release device
08/08/2012CN202370478U Safety device for gas injection and oil extraction wellhead
08/08/2012CN202370477U Bidirectional conduction deflation emptying valve for oil producing well opening oil sleeve
08/08/2012CN202370476U Stop valve
08/08/2012CN202370473U Full-size ball seat
08/08/2012CN202370439U Penetrating water-plugging rod-quitting device for drill rod
08/08/2012CN102628348A Tubular tubing float valve
08/08/2012CN101598009B Crystallization prevention control device for high temperature brine
08/07/2012US8235114 Method of fracturing and gravel packing with a tool with a multi-position lockable sliding sleeve
08/07/2012US8235103 Well tools incorporating valves operable by low electrical power input
08/07/2012CA2764764A1 Indexing sleeve for single-trip, multi-stage fracing
08/07/2012CA2674434C Apparatus and methods for utilizing a downhole deployment valve
08/07/2012CA2627141C Inflow control device
08/07/2012CA2483399C Thermally-controlled valves and methods of using the same in a wellbore
08/02/2012WO2012102775A2 Monitoring the health of a blowout preventer
08/02/2012WO2012066282A3 Valve assembly
08/02/2012US20120197527 Monitoring the health of a blowout preventer
08/02/2012US20120193101 Subsurface safety valve including safe additive injection
08/02/2012US20120193098 Selective fracturing tool
08/01/2012EP2481882A1 A subsurface safety valve including safe additive injection
08/01/2012CN202360060U Drill rod decompression valve
08/01/2012CN102619482A Quick-mounting device for oil pipe plug valve
07/2012
07/31/2012US8230935 Sand control screen assembly with flow control capability
07/31/2012CA2702124C Water control device using electromagnetics
07/27/2012CA2763980A1 A subsurface safety valve including safe additive injection
07/26/2012WO2012067786A3 Plug and method of unplugging a seat
07/26/2012WO2011110815A3 Operational control of multiple valves in a well
07/26/2012US20120186829 Setting Tool
07/26/2012US20120186825 Remote Actuation Testing Tool for High Pressure Differential Downhole Environments
07/26/2012US20120186824 Selective sleeve system and method of moving a sleeve
07/26/2012US20120186819 Varying pore size in a well screen
07/26/2012US20120186662 Gas lift nozzle valve
07/26/2012CA2824522A1 Telemetry operated circulation sub
07/25/2012EP2478184A1 Downhole measurement apparatus
07/25/2012EP2478181A2 Fracturing and gravel packing tool with multi movement wash pipe valve
07/25/2012CN202348230U Automatic anti-spraying plug valve switching device
07/25/2012CN202348229U Forcefully opening tool for subsurface safety valve
07/25/2012CN202348228U Elastic-sheet type pressure release valve
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