| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 02/17/2011 | CA2769204A1 Repeatable, compression set downhole bypass valve |
| 02/16/2011 | EP2283905A2 Subsea well production flow and separation system |
| 02/16/2011 | CN201747328U Underground layered test switch |
| 02/16/2011 | CN201747327U Permanent locking device of downhole casing valve |
| 02/16/2011 | CN201747326U Lift bypass valve |
| 02/16/2011 | CN201747325U Adjustable fixing throttle valve |
| 02/16/2011 | CN201747324U Hydraulic actuator for valve |
| 02/16/2011 | CN201747321U Oil-well pump slice mining converter |
| 02/16/2011 | CN201747313U High pressure oil and gas well safety control device |
| 02/16/2011 | CN201747312U Backflow prevention oil extraction wellhead device |
| 02/16/2011 | CN101975042A Fully functional anti-spouting oil drain device |
| 02/15/2011 | US7886849 System for drilling under-balanced wells |
| 02/15/2011 | US7886830 Downhole safety valve apparatus and method |
| 02/10/2011 | WO2011017424A2 Tubular system with selectively engagable sleeves and method |
| 02/10/2011 | US20110030969 Flow control in a well bore |
| 02/10/2011 | US20110030968 Tubular actuator, system and method |
| 02/10/2011 | US20110030965 Downhole Screen with Valve Feature |
| 02/10/2011 | US20110030964 Control Module With Dual Ball Valve Assemblies |
| 02/10/2011 | US20110030960 Methods and apparatus for a downhole tool |
| 02/09/2011 | EP2282004A1 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 02/09/2011 | EP2281106A1 System for pulse-injecting fluid into a borehole |
| 02/09/2011 | EP2281105A1 A sub sea hybrid valve actuator system and method |
| 02/09/2011 | CN201738878U Upper oil pipe orifice flow controller |
| 02/09/2011 | CN201738877U Vertical cementing manifold used for ocean |
| 02/09/2011 | CN201738876U Adjustable oil nozzle sleeve |
| 02/09/2011 | CN201738875U Hyperpressure/pressure-loss pilot valve used for controlling safety block valve in petroleum gas well |
| 02/09/2011 | CN201738863U Sucker rod blowout-prevention plug valve for oil field |
| 02/08/2011 | CA2625662C Methods and devices for treating multiple-interval well bores |
| 02/08/2011 | CA2524336C Modular actuator for valves and chokes |
| 02/03/2011 | WO2011014634A2 Apparatus and method for controlling water in-flow into wellbores |
| 02/03/2011 | WO2011014055A1 A system for completing wells in unconsolidated subterranean zone |
| 02/03/2011 | WO2010126988A3 Valve system for drilling systems |
| 02/03/2011 | WO2010123587A3 New and improved actuators and related methods |
| 02/03/2011 | US20110024195 Drilling with a high pressure rotating control device |
| 02/03/2011 | US20110024132 Multi-process electronic control valve system |
| 02/03/2011 | US20110024119 Downhole debris removal tool |
| 02/03/2011 | US20110024106 Ball Catcher with Retention Capability |
| 02/03/2011 | US20110024105 Multi-zone Screen Isolation System with selective Control |
| 02/03/2011 | CA2769601A1 Apparatus and method for controlling water in-flow into wellbores |
| 02/02/2011 | EP2279325A2 Drilling system with drill string valves |
| 02/02/2011 | CN201730605U 节流管汇 Choke manifold |
| 02/02/2011 | CN201730590U Underground underbalanced sleeve valve with circular arc type slide mandrel |
| 02/02/2011 | CN201730589U Mineral filling adjusting valve |
| 02/02/2011 | CN201730588U Novel oil well check valve |
| 02/02/2011 | CN201730579U High-temperature resistant well control device for double-pipe operation in horizontal wells |
| 02/01/2011 | US7878257 Triggering mechanism discriminated by length difference |
| 02/01/2011 | US7878256 Burst plug for a downhole fluid passage |
| 02/01/2011 | US7878252 Dual control line system and method for operating surface controlled sub-surface safety valve in a well |
| 01/27/2011 | US20110017470 Self-adjusting in-flow control device |
| 01/27/2011 | US20110017469 Rotatable valve for downhole completions |
| 01/27/2011 | CA2797934A1 Bottom hole assembly with ported completion and methods of fracturing therewith |
| 01/27/2011 | CA2746522A1 Bottom hole assembly with ported completion and methods for fracturing therewith |
| 01/27/2011 | CA2711329A1 Bottom hole assembly with ported completion and methods of fracturing therewith |
| 01/26/2011 | EP2278114A2 Apparatus and methods for drilling a wellbore using casing |
| 01/26/2011 | EP2278113A2 Apparatus and methods for drilling a wellbore using casing |
| 01/26/2011 | EP2278112A2 Apparatus and methods for drilling a wellbore using casing |
| 01/26/2011 | EP2278111A2 Apparatus and methods for drilling a wellbore using casing |
| 01/26/2011 | CN201723210U Flow regulating device for water blending well in oilfield |
| 01/26/2011 | CN101956541A Underground switching well used for measuring, directly reading and storing coalbed methane |
| 01/26/2011 | CN101956540A Novel drill rod valve |
| 01/26/2011 | CN101260791B Raising-out type ball seat |
| 01/20/2011 | WO2011009145A2 Tension-activated fluid bypass device |
| 01/20/2011 | WO2011008639A2 Subterranean valve operated by string relative movement |
| 01/20/2011 | WO2011008591A2 Tubular valve system and method |
| 01/20/2011 | WO2011008522A2 System and method for intermittent gas lift |
| 01/20/2011 | WO2011006220A1 Gas lift nozzle valve |
| 01/20/2011 | US20110011597 Tubular valve system and method |
| 01/20/2011 | US20110011594 Mud Pulse Telemetry System |
| 01/20/2011 | US20110011583 Systems and methods to filter and collect downhole fluid |
| 01/20/2011 | US20110011575 Straight-bore back pressure valve |
| 01/20/2011 | CA2766786A1 System and method for intermittent gas lift |
| 01/19/2011 | EP2274501A1 Device for injection and stimulation of fluids in a well bore |
| 01/19/2011 | EP2153015B1 Downhole flow control tool and method |
| 01/19/2011 | CN201714356U Casing gas recovery device for oil well in oil field |
| 01/19/2011 | CN201714339U Underground valve for preventing formation loss |
| 01/19/2011 | CN201714332U Drilling gas spraying-preventing system |
| 01/19/2011 | CN201711034U Backwash filter |
| 01/19/2011 | CN101952541A Ball dropping assembly and technique for use in a well |
| 01/19/2011 | CN101949274A Casing shut-in valve for cementing operation |
| 01/18/2011 | US7870908 Downhole valve having incrementally adjustable open positions and a quick close feature |
| 01/18/2011 | US7870907 Debris protection for sliding sleeve |
| 01/18/2011 | US7870906 Flow control systems and methods |
| 01/13/2011 | WO2011005826A1 Surface controlled subsurface safety valve assembly with primary and secondary valves |
| 01/13/2011 | WO2011005517A2 Through tubing intelligent completion and method |
| 01/13/2011 | WO2011005144A1 Downhole device |
| 01/13/2011 | WO2010124303A3 Processes and systems for treating oil and gas wells |
| 01/13/2011 | WO2010114741A3 Adjustable flow control devices for use in hydrocarbon production |
| 01/13/2011 | WO2010111158A3 Active mud valve system |
| 01/13/2011 | US20110005770 Subsea control system |
| 01/13/2011 | US20110005765 Sampling Skid for Subsea Wells |
| 01/13/2011 | US20110005764 Tool for connecting pipelines |
| 01/13/2011 | US20110005763 Subterranean Valve Operated by String Relative Movement |
| 01/13/2011 | US20110005759 Fracturing system and method |
| 01/13/2011 | CA2767568A1 Flow restrictor device |
| 01/13/2011 | CA2767197A1 Downhole device |
| 01/12/2011 | EP2273066A1 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 01/12/2011 | EP2271822A2 System and method for recompletion of old wells |
| 01/12/2011 | EP2271820A1 Flow controller device |
| 01/12/2011 | CN201705293U Rotary piston control type underground switch |
| 01/12/2011 | CN201705292U Shaft bottom string running-through switching valve device for gas-oil well production |