| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 01/07/2010 | WO2010001087A2 Apparatus and method for inflow control |
| 01/07/2010 | WO2009126438A3 A tubing pressure insensitive actuator system and method |
| 01/07/2010 | WO2009120581A3 Multiple spring subsurface safety valve |
| 01/07/2010 | WO2009102610A3 System for drilling under-balanced wells |
| 01/07/2010 | US20100000727 Apparatus and method for inflow control |
| 01/06/2010 | EP2140102A1 Control mechanism for subsurface safety valve |
| 01/06/2010 | CN201377305Y Hollow rod watered check valve |
| 01/06/2010 | CN201377304Y Oil well casing pressure automatic-regulating device |
| 01/06/2010 | CN201377301Y No-killing balanced feeding type switching valve device |
| 01/05/2010 | US7642926 Control system of an actuator for the actuation of submarine devices |
| 01/05/2010 | US7640992 Throttle valve for injecting a fluid into geological formations |
| 01/05/2010 | US7640990 Flow control valve for injection systems |
| 01/05/2010 | US7640989 Electrically operated well tools |
| 01/05/2010 | US7640984 Method for drilling and casing a wellbore with a pump down cement float |
| 12/31/2009 | US20090321088 Shear activated safety valve system |
| 12/31/2009 | US20090321078 Method for reduction of control lines to operate a multi-zone completion |
| 12/31/2009 | US20090321076 Completion Method with Telescoping Perforation & Fracturing Tool |
| 12/30/2009 | CN201372795Y Condensate gas well wellhead sampling device |
| 12/30/2009 | CN201372784Y Oil well separate-layer proration regulator |
| 12/30/2009 | CN201372770Y Blowout prevention valve |
| 12/30/2009 | CN201372769Y Back pressure valve with pressure sensor |
| 12/30/2009 | CN201372768Y Gas well sliding sleeve throttling one-way valve |
| 12/30/2009 | CN201372767Y Back pressure valve |
| 12/30/2009 | CN100575658C Blowout-prevention blocking device for oil pipe used in oil and gas well |
| 12/30/2009 | CN100575657C Anti-theft valve of anti-theft oil-production tree |
| 12/29/2009 | US7637326 Downhole safety valve apparatus and method |
| 12/29/2009 | US7637324 Isolation valve for subsurface safety valve line |
| 12/29/2009 | US7637323 Ball seat having fluid activated ball support |
| 12/29/2009 | US7637317 Frac gate and well completion methods |
| 12/29/2009 | CA2643138C Hydraulic stepping valve actuated sliding sleeve |
| 12/29/2009 | CA2534848C Hydraulically actuated control system for use in a subterranean well |
| 12/23/2009 | WO2009155268A2 Positive sidewall core sample identification system |
| 12/23/2009 | WO2009153551A1 Control of sub surface safety valves |
| 12/23/2009 | WO2009129307A3 Multi-section tree completion system |
| 12/23/2009 | WO2009126520A3 Multi-cycle isolation valve and mechanical barrier |
| 12/23/2009 | CN101608539A High and low voltage guide valve |
| 12/23/2009 | CA2728413A1 Control of sub surface safety valves |
| 12/22/2009 | US7635029 Downhole electrical-to-hydraulic conversion module for well completions |
| 12/22/2009 | CA2551945C Variable choke valve |
| 12/17/2009 | WO2009151811A1 Coater extrudable ball seats |
| 12/17/2009 | WO2009117297A3 Actuatable subsurface safety valve and method |
| 12/17/2009 | US20090308614 Coated extrudable ball seats |
| 12/17/2009 | US20090308607 System and method for maintaining operability of a downhole actuator |
| 12/17/2009 | US20090308588 Method and Apparatus for Exposing a Servicing Apparatus to Multiple Formation Zones |
| 12/16/2009 | EP2132407A2 Cement plug launch system |
| 12/16/2009 | EP2132406A1 Ball seat assembly and method of controlling fluid flow through a hollow body |
| 12/16/2009 | EP2132403A2 Drilling head for reborinq a stuck valve |
| 12/16/2009 | CN201363135Y Hydraulic automatic control device for protecting gas-oil wells |
| 12/16/2009 | CN201363119Y Automatic vertical correcting combined-type full-functional well sealing device |
| 12/16/2009 | CA2668129A1 Method and apparatus for exposing a servicing apparatus to multiple formation zones |
| 12/15/2009 | CA2567890C Erosion resistant aperture for a downhole valve or ported flow control tool |
| 12/15/2009 | CA2504503C Variable orifice bypass plunger |
| 12/15/2009 | CA2401668C Power generation using batteries with reconfigurable discharge |
| 12/10/2009 | WO2009094308A3 Pressure balanced piston for subsurface safety valves |
| 12/10/2009 | US20090301732 Downhole Valve Actuation Methods and Apparatus |
| 12/10/2009 | US20090301728 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 12/10/2009 | US20090301727 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 12/10/2009 | US20090301726 Apparatus and Method for Controlling Water In-Flow Into Wellbores |
| 12/10/2009 | US20090301713 Backpressure Valve for Wireless Communication |
| 12/09/2009 | EP2129866A2 Rupture disc assembly that withstands much higher back pressures than actuation pressure |
| 12/09/2009 | EP2129858A1 Drilling tool with feed control |
| 12/09/2009 | CN201358781Y Theft-proof wellhead oil casing pressure device |
| 12/09/2009 | CN201358771Y Restrictor capable of adjusting opening pressure of sliding sleeve |
| 12/09/2009 | CN201358770Y Tubing drain |
| 12/09/2009 | CN201358755Y Underground switch slide bushing |
| 12/09/2009 | CN201358754Y Horizontal well hydraulic layer-change switch |
| 12/09/2009 | CN201358753Y Oil field water injection well screw-plug liquid feeding uniflow valve filter |
| 12/09/2009 | CN201358748Y Novel blow-out preventing packer for thermal recovery |
| 12/09/2009 | CN101598010A Anti-pollution back pressure valve tool |
| 12/09/2009 | CN101598009A Crystallization prevention control device for high temperature brine |
| 12/09/2009 | CN101598008A Switch valve device at the top of heat injection column in thermal recovery wellhead |
| 12/09/2009 | CA2668085A1 Backpressure valve for wireless communication |
| 12/08/2009 | US7628213 Multi-cycle downhole tool with hydraulic damping |
| 12/08/2009 | US7628210 Ball seat having ball support member |
| 12/08/2009 | CA2654447C Well bore isolation using tool with sliding sleeve |
| 12/03/2009 | WO2009146206A2 Subsea tree safety control system |
| 12/03/2009 | WO2009143628A1 Cementing sub for annulus cementing |
| 12/03/2009 | US20090294136 Surface controlled subsurface safety valve having integral pack-off |
| 12/03/2009 | US20090294133 Injection Apparatus and Method |
| 12/03/2009 | US20090294132 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 12/03/2009 | US20090294131 Christmas Tree and Wellhead Design |
| 12/03/2009 | US20090294125 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 12/03/2009 | CA2726200A1 Cementing sub for annulus cementing |
| 12/02/2009 | EP2126278A1 Valve and method for controlling flow in tubular members |
| 12/02/2009 | CN201354622Y Rotary oil drainage device |
| 12/02/2009 | CN201354621Y Pressure-adjustable check valve |
| 12/02/2009 | CN201354620Y Pressure-measurement stopcock |
| 12/02/2009 | CN101595274A System and method for facilitating downhole operations |
| 12/02/2009 | CN101592024A Degassing system for closed production space of oil well |
| 12/01/2009 | US7624809 Method and apparatus for stimulating hydrocarbon wells |
| 12/01/2009 | US7624807 Deep set safety valve |
| 12/01/2009 | US7624792 Shear activated safety valve system |
| 11/26/2009 | WO2009111192A3 Multi-cycle single line switch |
| 11/26/2009 | US20090288838 Flow control in a well bore |
| 11/26/2009 | US20090288832 Varying Access Points for Tubing and Casing Monitoring and Casing Annulus Remediation Systems |
| 11/25/2009 | EP2122122A1 Casing valves system for selective well stimulation and control |
| 11/25/2009 | EP2122121A2 Valve seat assembly, downhole tool and methods |
| 11/25/2009 | EP2122119A2 Tool and method for establishing hydraulic communication with a subsurface safety valve |
| 11/25/2009 | CN201351480Y Kelly multifunctional automatic leak-proof valve |
| 11/25/2009 | CN201351473Y Combined valve type throttle pipe device |