| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 07/08/2009 | CN100510437C Tightening system for secure connection of at least two elements with one another |
| 07/07/2009 | US7556102 High differential shifting tool |
| 07/07/2009 | CA2489063C Filtered actuator port for hydraulically actuated downhole tools |
| 07/07/2009 | CA2483527C Instrumentation for a downhole deployment valve |
| 07/02/2009 | WO2009079770A1 Dual-stage valve straddle packer for selective stimulation of wells |
| 07/02/2009 | WO2009052103A3 Water sensing devices and methods utilizing same to control flow of subsurface fluids |
| 07/02/2009 | US20090166044 Selectively Activated Float Equipment |
| 07/02/2009 | US20090166025 Collection and Lift Modules for use in a Wellbore |
| 07/01/2009 | EP2074276A1 Wellbore tool for filling, circulating and backflowing fluids |
| 07/01/2009 | CN201265393Y Sand-flushing oil drain device |
| 07/01/2009 | CN201265392Y High-pressure anti-corrosion downhole safety valve for oil gas well |
| 07/01/2009 | CN201265391Y High-pressure difference large-aperture gas-tight back-flushing valve for oil-gas field |
| 07/01/2009 | CN201265390Y Special constant flow control valve for oil field |
| 06/30/2009 | US7552774 Control line hydrostatic minimally sensitive control system |
| 06/30/2009 | US7552773 Multicycle hydraulic control valve |
| 06/30/2009 | US7552761 Method and system for wellbore communication |
| 06/30/2009 | CA2632812C Apparatus and method for installation of subsea well completion systems |
| 06/30/2009 | CA2563092C Flow switchable check valve |
| 06/30/2009 | CA2508854C Valve within a control line |
| 06/25/2009 | WO2009035917A4 Method and apparatus for multi-positioning a sleeve |
| 06/25/2009 | US20090159298 Methods and systems for completing a well with fluid tight lower completion |
| 06/25/2009 | US20090159293 Isolating tubing |
| 06/25/2009 | US20090159292 Logging tool deployment systems and methods without pressure compensation |
| 06/25/2009 | US20090159290 Controller for a Hydraulically Operated Downhole Tool |
| 06/25/2009 | US20090159289 Ball seat having segmented arcuate ball support member |
| 06/25/2009 | US20090159266 Actuating mechanism |
| 06/25/2009 | US20090159264 Hydraulic sleeve valve with position indication, alignment, and bypass |
| 06/24/2009 | CN201262065Y Reverse circulation valve used for deep well fracturing |
| 06/23/2009 | US7549485 Expandable reamer apparatus for enlarging subterranean boreholes and methods of use |
| 06/23/2009 | CA2401709C Wireless downhole well interval inflow and injection control |
| 06/21/2009 | CA2633335A1 Full bore valve for downhole use |
| 06/20/2009 | CA2618195A1 Rotatable plunger lift |
| 06/20/2009 | CA2615431A1 Venturi siphon atomization liquid lift apparatus and method |
| 06/18/2009 | WO2009076334A2 Zonal isolation of telescoping perforation appartus with memory based material |
| 06/18/2009 | WO2009052091A3 Water control device using electromagnetics |
| 06/18/2009 | US20090151959 Quick lock wireline valve/blow-out preventor and methods for making and using same |
| 06/18/2009 | US20090151950 Active integrated well completion method and system |
| 06/18/2009 | US20090151925 Well Screen Inflow Control Device With Check Valve Flow Controls |
| 06/18/2009 | US20090151924 Downhole tool with shape memory alloy actuator |
| 06/18/2009 | CA2708738A1 Zonal isolation of telescoping perforation apparatus with memory based material |
| 06/16/2009 | US7546879 Flow control device |
| 06/11/2009 | WO2009073538A1 Downhole tool with capillary biasing system |
| 06/11/2009 | WO2009073531A1 An improved swellable material and method |
| 06/11/2009 | WO2009073391A2 Multi-position valves for fracturing and sand control associated completion methods |
| 06/11/2009 | WO2009073357A2 High differential shifting tool |
| 06/11/2009 | WO2009038999A4 Annular pressure monitoring during hydraulic fracturing |
| 06/11/2009 | US20090145609 Valve Responsive to Fluid Properties |
| 06/11/2009 | CA2707480A1 Multi-position valves for fracturing and sand control and associated completion methods |
| 06/10/2009 | CN201254970Y Light and dependable oil well producing valve |
| 06/09/2009 | US7543651 Non-elastomer cement through tubing retrievable safety valve |
| 06/09/2009 | US7543636 Diagnostic sleeve shifting tool |
| 06/09/2009 | US7543634 Method and apparatus for wellbore fluid treatment |
| 06/09/2009 | CA2463560C Methods and systems for optical endpoint detection of a sliding sleeve valve |
| 06/09/2009 | CA2401723C Wireless communication using well casing |
| 06/04/2009 | WO2009035923A3 Multi-function indicating tool |
| 06/04/2009 | WO2008146012A3 Downhole apparatus |
| 06/04/2009 | US20090142199 Quick lift zero flutter oil service pump valve |
| 06/04/2009 | US20090139729 Downhole tool with capillary biasing system |
| 06/04/2009 | US20090139728 Screened valve system for selective well stimulation and control |
| 06/04/2009 | US20090139727 Shape Memory Alloy Actuation |
| 06/04/2009 | US20090139726 High Differential Shifting Tool |
| 06/03/2009 | EP2065552A1 Rotary control valve and associated actuator control system |
| 06/03/2009 | EP2064411A2 Downhole hydraulic control system with failsafe features |
| 06/03/2009 | EP1606526A4 Method for preventing critical annular pressure buildup |
| 06/03/2009 | CN201250648Y Water searching and blocking integral switch controlled by oil sucker rod |
| 06/03/2009 | CN201250647Y Horizontal underground punching one-way fluid valve |
| 06/03/2009 | CN201250646Y Underwater hydraulic pressure directional control valve |
| 06/03/2009 | CN201250645Y Underwater electric hydraulic control valve |
| 06/03/2009 | CN201250644Y Oil production process multi valve group device |
| 06/03/2009 | CN201250643Y Pressure regulating valve |
| 06/03/2009 | CN101446184A Pressure-transmittable oil well pump filling valve |
| 06/02/2009 | CA2555646C Apparatus for changing wellbore fluid temperature |
| 06/02/2009 | CA2500706C Lock open tool for downhole safety valve |
| 06/02/2009 | CA2484623C Installation of downhole electrical power cable and safety valve assembly |
| 06/02/2009 | CA2440922C Downhole tool |
| 06/02/2009 | CA2399130C A method and apparatus for the optimal predistortion of an electromagnetic signal in a downhole communication system |
| 06/02/2009 | CA2332241C Wireless coiled tubing joint locator |
| 05/28/2009 | WO2009067485A2 Circulation sub with indexing mechanism |
| 05/28/2009 | WO2009067298A1 Back pressure valve |
| 05/28/2009 | WO2009048823A3 A method and apparatus for determining a parameter at an inflow control device in a well |
| 05/28/2009 | WO2009048822A3 Flow restriction device |
| 05/28/2009 | WO2008101021A3 Tool and method for establishing hydraulic communication with a subsurface safety valve |
| 05/28/2009 | US20090133879 Rotary Control Valve and Associated Actuator Control System |
| 05/28/2009 | US20090133869 Water Sensitive Adaptive Inflow Control Using Couette Flow To Actuate A Valve |
| 05/28/2009 | CA2705295A1 Circulation sub with indexing mechanism |
| 05/27/2009 | CN201246164Y Sampling anti-freeze valve of oil pumping machine well head |
| 05/27/2009 | CN201246146Y Adjusting arm of annular allocator |
| 05/27/2009 | CN201246137Y Improved flat plate valve |
| 05/27/2009 | CN201246136Y Blowout prevention safety valve of oil pumping machine well head |
| 05/27/2009 | CN101440700A Disconnection plugging test valve |
| 05/26/2009 | US7537062 Flapper valve and actuator |
| 05/26/2009 | US7537056 System and method for gas shut off in a subterranean well |
| 05/26/2009 | CA2311160C Method for drilling and completing a wellbore and a pump down cement float collar for use therein |
| 05/21/2009 | US20090126936 Actuating mechanism |
| 05/20/2009 | CN201241701Y Anti-theft sampling valve of oil well |
| 05/20/2009 | CN201241662Y Opening and closing tools of mechanical type downhole blowout preventer |
| 05/20/2009 | CN201241661Y Pressure relief pipe valve assembly |
| 05/20/2009 | CN201241660Y Water controlling valve for oil extraction |
| 05/19/2009 | US7533729 Reverse cementing float equipment |
| 05/19/2009 | US7533728 Ball operated back pressure valve |