| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 07/16/2013 | US8485264 Multi-stage modulator |
| 07/16/2013 | US8485261 Apparatuses and methods for closing and reopening a pipe |
| 07/16/2013 | US8485225 Flow control screen assembly having remotely disabled reverse flow control capability |
| 07/16/2013 | CA2801562A1 Variable flow resistance system with circulation inducing structure therein to variably resist flow in a subterranean well |
| 07/11/2013 | WO2013058982A3 Method and apparatus for removing shifting tools and providing wellbore isolation |
| 07/11/2013 | WO2013032687A3 Injection of fluid into selected ones of multiple zones with well tools selectively responsive to magnetic patterns |
| 07/11/2013 | WO2013028335A3 Downhole fluid flow control system having a fluidic module with a bridge network and method for use of same |
| 07/11/2013 | WO2011110856A3 An electric subsea valve actuating device |
| 07/11/2013 | US20130175095 Pressure activated flow switch for a downhole tool |
| 07/11/2013 | US20130175094 Safety Mechanism For A Well, A Well Comprising The Safety Mechanism, And Related Methods |
| 07/11/2013 | US20130175047 Variably configurable wellbore junction assembly |
| 07/11/2013 | US20130175040 Dual Inline Sliding Sleeve Valve |
| 07/11/2013 | US20130175033 Treatment system for multiple zones |
| 07/11/2013 | US20130175025 Integrated opening subsystem for well closure system |
| 07/10/2013 | CN203050662U Hydraulic sliding sleeve switch |
| 07/10/2013 | CN203050657U Horizontal well infinite stage even acidification tubular column |
| 07/10/2013 | CN203050655U Directional ball seat |
| 07/10/2013 | CN203050626U Novel closable fracture sliding sleeve assembly |
| 07/10/2013 | CN203050625U Internal controlling tool of oil field oil-water well tubular column |
| 07/10/2013 | CN203050624U Lifting type tube column internal control tool |
| 07/10/2013 | CN203050623U Pressure balance check valve for coiled tubing separate-layer fracturing |
| 07/10/2013 | CN203050622U Rotation-proof tooth type drillable ball injection sliding sleeve |
| 07/10/2013 | CN203050621U Switchable pitching drive crushing sliding sleeve |
| 07/10/2013 | CN203050620U Mechanical coding sliding sleeve |
| 07/10/2013 | CN203050619U Intelligent high-pressure adjusting valve of wellhead |
| 07/10/2013 | CN203050618U Metering oil nozzle sleeve |
| 07/10/2013 | CN203050617U Intelligent underground dropping and fishing valve device |
| 07/10/2013 | CN203050616U Oil draining device with good tightness |
| 07/10/2013 | CN203050615U Well cementation valve ball |
| 07/10/2013 | CN203050614U Well cementation valve core |
| 07/10/2013 | CN203050557U Sucker rod self-rotation eccentric-wear-resistant oil-production-enhancing device |
| 07/10/2013 | CN103195391A Slide sleeve switch closing tool |
| 07/09/2013 | US8479831 Flow path control based on fluid characteristics to thereby variably resist flow in a subterranean well |
| 07/09/2013 | US8479826 Protection of a safety valve in a subterranean well |
| 07/09/2013 | US8479823 Plug counter and method |
| 07/09/2013 | US8479822 Downhole tool with expandable seat |
| 07/09/2013 | US8479808 Downhole tools having radially expandable seat member |
| 07/09/2013 | US8479571 Christmas tree with internally positioned flowmeter |
| 07/09/2013 | CA2716834C Cluster opening sleeves for wellbore treatment |
| 07/09/2013 | CA2716802C Phase-controlled well flow control and associated methods |
| 07/04/2013 | WO2013101945A1 Split ring shift control for hydraulic pulse valve |
| 07/04/2013 | US20130168099 Wellbore frac tool with inflow control |
| 07/04/2013 | US20130168098 Apparatus and Method for Fracturing a Well |
| 07/04/2013 | US20130168090 Apparatus and method for fluid treatment of a well |
| 07/04/2013 | US20130167944 Method and system for testing a multiplexed bop control system |
| 07/04/2013 | CA2825002A1 Split ring shift control for hydraulic pulse valve |
| 07/03/2013 | EP2609286A1 Variable flow restrictor for use in a subterranean well |
| 07/03/2013 | CN203035159U Sliding sleeve switch |
| 07/03/2013 | CN203035158U Remote hydraulic well opening and closing device used for oil-gas well mouth emergency rescue |
| 07/03/2013 | CN203035082U Underground plate valve type pulser |
| 07/03/2013 | CN103184845A Vertical subsea tree assembly control |
| 07/03/2013 | CN102182438B Layered fracturing technology for variable-length graded sliding sleeve |
| 07/03/2013 | CN101787866B Pilot-operated type self-holding electromagnetic valve for gas well mouth |
| 07/02/2013 | US8474535 Well screen inflow control device with check valve flow controls |
| 07/02/2013 | US8474534 Functionalized surface for flow control device |
| 06/27/2013 | WO2013095419A1 Functionalized surface for flow control device |
| 06/27/2013 | WO2013092945A1 Production system for producing hydrocarbons from a well |
| 06/27/2013 | WO2013092805A1 An annular barrier with a self-actuated device |
| 06/27/2013 | WO2013092532A1 Drillstring valve |
| 06/27/2013 | WO2012168705A3 Valve control device |
| 06/27/2013 | US20130161024 Downhole Fluid Flow Control System Having Temporary Sealing Substance and Method for Use Thereof |
| 06/27/2013 | US20130161020 Apparatus and Method for Recovering Fluids from a Well and/or Injecting Fluids into a Well |
| 06/27/2013 | US20130161018 Functionalized Surface for Flow Control Device |
| 06/27/2013 | US20130161017 Hydrostatically Powered Fracturing Sliding Sleeve |
| 06/27/2013 | US20130161015 Apparatus and method for fracturing a well |
| 06/27/2013 | US20130160990 Flow-affecting device |
| 06/27/2013 | DE102012112338A1 Strömungsbegrenzer und Bohraufbau Flow restrictor and drilling assembly |
| 06/27/2013 | CA2858474A1 An annular barrier with a self-actuated device |
| 06/27/2013 | CA2855939A1 Functionalized surface for flow control device |
| 06/26/2013 | EP2607616A1 Production system for producing hydrocarbons from a well |
| 06/26/2013 | EP2607615A1 Drillstring valve |
| 06/26/2013 | EP2607613A1 An annular barrier with a self-actuated device |
| 06/26/2013 | CN203022691U Bridge type anti-return sand setting device |
| 06/26/2013 | CN203022690U Well mouth anti-theft valve for oil field wells |
| 06/26/2013 | CN203022689U Ground oil extraction device |
| 06/26/2013 | CN203022688U Check valve |
| 06/26/2013 | CN203022687U Check valve sleeve |
| 06/26/2013 | CN103180546A Collapsible casing device for use in controlling flow |
| 06/26/2013 | CN103174399A Underground automatic control sliding sleeve device for multi-pressure-stratum system oil gas development |
| 06/26/2013 | CN103170801A Downhole lubricator valve |
| 06/25/2013 | US8469107 Downhole-adjustable flow control device for controlling flow of a fluid into a wellbore |
| 06/25/2013 | US8469106 Downhole displacement based actuator |
| 06/25/2013 | US8469105 Downhole-adjustable flow control device for controlling flow of a fluid into a wellbore |
| 06/25/2013 | US8469104 Valves, bottom hole assemblies, and method of selectively actuating a motor |
| 06/25/2013 | US8469086 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 06/25/2013 | CA2714879C Methods and apparatus for optimizing well production |
| 06/25/2013 | CA2700296C Gas lift valve |
| 06/21/2013 | CA2816571A1 Drillstring valve |
| 06/20/2013 | WO2013090660A1 Connection maker |
| 06/20/2013 | WO2013090423A1 Sharp phase change shape memory alloy thermal actuator |
| 06/20/2013 | WO2013089781A1 Fluid flow control |
| 06/20/2013 | WO2013089753A1 Subsurface safety valve deployable via electric submersible pump |
| 06/20/2013 | WO2013089746A1 Integrated opening subsystem for well closure system |
| 06/20/2013 | WO2013086616A1 An inflow control valve for controlling the flow of fluids into a generally horizontal production well and method of using the same |
| 06/20/2013 | US20130153242 In-riser power generation |
| 06/20/2013 | US20130153241 Blow out preventer (bop) corroborator |
| 06/20/2013 | US20130153239 Fluid safety valve |
| 06/20/2013 | US20130153238 Fluid flow control |
| 06/20/2013 | US20130153237 Ball drop wellhead control apparatus |
| 06/20/2013 | US20130153236 Subterranean Tool Actuation Using a Controlled Electrolytic Material Trigger |