| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 09/03/2009 | US20090218097 Wellbore intervention tool |
| 09/03/2009 | US20090218095 Pressure Equalising Devices |
| 09/03/2009 | US20090218089 Phase-Controlled Well Flow Control and Associated Methods |
| 09/03/2009 | CA2813503A1 Phase-controlled well flow control and associated methods |
| 09/03/2009 | CA2717048A1 Tubular member having self-adjusting valves controlling the flow of fluid into or out of the tubular member |
| 09/03/2009 | CA2716802A1 Phase-controlled well flow control and associated methods |
| 09/03/2009 | CA2711198A1 Pressure actuable downhole tool and method for actuating the same |
| 09/02/2009 | EP2096254A2 Control system for an annulus balanced subsurface safety valve |
| 09/02/2009 | EP2094939A1 Control line hydrostatic minimally sensitive control system |
| 09/02/2009 | EP2094938A1 Distortion compensation for rod piston bore in subsurface safety valves |
| 09/02/2009 | EP2094934A2 Restriction element trap for use with and actuation element of a downhole apparatus and method of use |
| 09/02/2009 | CN201301689Y Automatic open-close control device for top-drive cock |
| 09/02/2009 | CN201301688Y Oil well pipe column check valve |
| 09/02/2009 | CN201301687Y Double theftproof gate |
| 09/02/2009 | CN101519950A Integrated flow control device and isolated component |
| 09/01/2009 | CA2618848C Pulse width modulated downhole flow control |
| 08/27/2009 | WO2009104072A1 Gate valve actuator and method |
| 08/27/2009 | WO2009073391A3 Multi-position valves for fracturing and sand control associated completion methods |
| 08/27/2009 | US20090211814 Drill string flow control valves and methods |
| 08/27/2009 | US20090211762 Detachable Electrical Actuator |
| 08/27/2009 | US20090211761 Oil and gas well completion system and method of installation |
| 08/27/2009 | US20090211748 Device for Conducting Cementing Operations and Inflow Regulation |
| 08/26/2009 | CN201297418Y Pressure sensing guide valve |
| 08/26/2009 | CN201297410Y High-pressure fixed throttle valve |
| 08/26/2009 | CN201297163Y Jet apparatus used for chemical water plugging of oil well |
| 08/26/2009 | CN201297155Y Drill rod liquid-discharging valve |
| 08/26/2009 | CN101514614A Dry ice sublimation hole bottom refrigerating and pressure keeping sampler and sampling method |
| 08/25/2009 | US7578351 Configurable wellhead system with permanent fracturing spool and method of use |
| 08/25/2009 | CA2521934C Pressure actuated tubing safety valve |
| 08/20/2009 | WO2009102214A1 Device for injection and stimulation of fluids in a well bore |
| 08/20/2009 | WO2009101424A2 Flow stop valve |
| 08/20/2009 | US20090206290 Low power actuator and valve-actuator combination |
| 08/20/2009 | US20090205837 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 08/20/2009 | US20090205836 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 08/20/2009 | US20090205834 Adjustable Flow Control Devices For Use In Hydrocarbon Production |
| 08/20/2009 | US20090205833 Thermal activation mechanisms for use in oilfield applications |
| 08/20/2009 | US20090205827 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 08/20/2009 | CA2715250A1 System for drilling under-balanced wells |
| 08/20/2009 | CA2714768A1 Flow stop valve |
| 08/20/2009 | CA2713230A1 Device for injection and stimulation of fluids in a well bore |
| 08/19/2009 | CN201292848Y Novel oil well anti-theft sampler |
| 08/19/2009 | CN201292820Y Hydraulic cut off control device for well site safety |
| 08/19/2009 | CN100529489C 10000 PSI ultra-low temperature butterfly checkvalve |
| 08/18/2009 | US7575062 Methods and devices for treating multiple-interval well bores |
| 08/18/2009 | US7575058 Incremental annular choke |
| 08/13/2009 | WO2009098512A2 Apparatus and method for controlling the flow of downhole fluids |
| 08/13/2009 | WO2009098498A1 Actuator device for downhole tools |
| 08/13/2009 | US20090200038 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 08/13/2009 | US20090200034 Completion tool |
| 08/13/2009 | CA2715073A1 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 08/12/2009 | EP2088279A2 Downhole completion tool |
| 08/12/2009 | EP2087200A1 Valve for equalizer sand screens |
| 08/12/2009 | CN201288528Y Down-hole valve and system with integrated sensor |
| 08/11/2009 | US7571765 Hydraulic open hole packer |
| 08/06/2009 | US20090194291 Hydraulic oil well pumping apparatus |
| 08/06/2009 | US20090194289 Water sensitive adaptive inflow control using cavitations to actuate a valve |
| 08/05/2009 | EP2084437A1 Valve |
| 08/05/2009 | CN101498205A Horizontal well washing valve blocking apparatus |
| 07/30/2009 | WO2009094309A2 Pressure balanced piston for subsurface safety valves |
| 07/30/2009 | WO2009094308A2 Pressure balanced piston for subsurface safety valves |
| 07/30/2009 | US20090188665 Monitoring of Downhole Parameters and Tools Utilizing Fiber Optics |
| 07/29/2009 | EP2082114A1 An underwater apparatus for operating underwater equipment |
| 07/29/2009 | EP1082546B1 A device and method for regulating fluid flow in a well |
| 07/29/2009 | CN201280911Y Drip |
| 07/29/2009 | CN101493002A Control system communication and lock open tool and method for locking open a safety valve and communicating with surface |
| 07/28/2009 | CA2593440C Apparatus and method for locating joints in coiled tubing operations |
| 07/28/2009 | CA2529962C System for completing multiple well intervals |
| 07/23/2009 | WO2009090367A1 Improved seal |
| 07/23/2009 | WO2009089622A1 System for pulse-injecting fluid into a borehole |
| 07/23/2009 | US20090183883 Downhole valve with pass through id |
| 07/23/2009 | CA2712142A1 System for pulse-injecting fluid into a borehole |
| 07/22/2009 | EP2079899A2 Tubing pressure insensitive control system |
| 07/22/2009 | CN201277008Y Pull-discharging type universal oil drip |
| 07/22/2009 | CN201277007Y Anti-clamp sliding bush backwashing valve |
| 07/22/2009 | CN201277006Y Automatic decompression flashboard |
| 07/22/2009 | CN101490360A Method for flow control and autonomous valve or flow control device |
| 07/21/2009 | US7562713 Downhole actuation tools |
| 07/21/2009 | CA2497027C Apparatus and methods for utilizing a downhole deployment valve |
| 07/21/2009 | CA2485123C Multiple zone downhole intelligent flow control valve system and method for controlling commingling of flows from multiple zones |
| 07/16/2009 | WO2009088621A2 Delayed acting gravel pack fluid loss valve |
| 07/16/2009 | WO2009088292A1 Improved method for flow control and autonomous valve or flow control device |
| 07/16/2009 | US20090178808 Convertible seal |
| 07/16/2009 | CA2711365A1 Improved method for flow control and autonomous valve or flow control device |
| 07/15/2009 | CN201273173Y Valve core of down-hole blowout preventer |
| 07/15/2009 | CN201273172Y Novel oil well blowout-prevention drip |
| 07/15/2009 | CN201273171Y No-killing downhole control valve |
| 07/15/2009 | CN201273170Y Oil well partial pressure mixed oil extraction apparatus |
| 07/15/2009 | CN101484661A Hydraulic metering valve for operation of downhole tools |
| 07/15/2009 | CN101484660A Safety vent valve |
| 07/15/2009 | CN101482002A Built-in pipe lofting device |
| 07/14/2009 | US7559358 Downhole uses of electroactive polymers |
| 07/14/2009 | CA2288492C Unconsolidated zonal isolation and control |
| 07/09/2009 | WO2009085813A2 Ball dropping assembly and technique for use in a well |
| 07/09/2009 | WO2009085732A2 Mechanical actuator with electronic adjustment |
| 07/09/2009 | WO2009061387A3 Wellsite measurement and control while producing device |
| 07/09/2009 | WO2009052149A3 Permeable medium flow control devices for use in hydrocarbon production |
| 07/09/2009 | WO2009052076A3 Water absorbing materials used as an in-flow control device |
| 07/09/2009 | US20090173503 Delayed Acting Gravel Pack Fluid Loss Valve |
| 07/09/2009 | CA2706501A1 Mechanical actuator with electronic adjustment |
| 07/08/2009 | CN201269079Y 斜面式流量控制阀 Ramp flow control valve |