| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 01/24/2007 | CN2861454Y Oil pipe suspension head of oil production tree |
| 01/23/2007 | US7165620 Wellhead completion system having a horizontal control penetrator and method of using same |
| 01/23/2007 | CA2502399C Hydraulic fluid distribution system |
| 01/18/2007 | WO2007008351A1 Underbalanced drilling applications hydraulically operated formation isolation valve |
| 01/18/2007 | WO2006042338A3 Apparatus and method for increasing well production |
| 01/18/2007 | US20070012459 Downhole actuation method and apparatus for operating remote well control device |
| 01/18/2007 | US20070012458 Variable choke valve |
| 01/18/2007 | US20070012455 Method and associated system for setting downhole control pressure |
| 01/18/2007 | US20070012454 Flow Control Valve For Injection Systems |
| 01/18/2007 | US20070012440 Activating mechanism for hydraulically operable downhole tool |
| 01/17/2007 | CN2858945Y Control valve for oil well polymer injection |
| 01/17/2007 | CN2858938Y Adjustable fixed choke |
| 01/17/2007 | CN2858937Y Pumping unit of oil well |
| 01/17/2007 | CN2858931Y Anti-theft device for oil well |
| 01/16/2007 | US7163066 Gravity valve for a downhole tool |
| 01/16/2007 | US7163064 Surface flow valve and method |
| 01/13/2007 | CA2714879A1 Methods and apparatus for optimizing well production |
| 01/11/2007 | WO2007003894A2 Wellbore cleaning method and apparatus |
| 01/11/2007 | WO2007003597A1 Mehod and apparatus for actuating oilfield equipment |
| 01/11/2007 | US20070007012 Flow completion system |
| 01/11/2007 | US20070007007 Method and apparatus for wellbore fluid treatment |
| 01/11/2007 | CA2612092A1 Wellbore cleaning method and apparatus |
| 01/10/2007 | CN2856404Y One-way fixed pressure stop valve |
| 01/10/2007 | CN2856403Y One-way fixed pressure stop valve of electric pump flushable well |
| 01/10/2007 | CN2856402Y Breaking/falling free novel travelling valve |
| 01/10/2007 | CN2856395Y Anti-leakage wellhead device |
| 01/10/2007 | CN2856376Y Drilling parts |
| 01/09/2007 | US7159662 System for controlling a hydraulic actuator, and methods of using same |
| 01/04/2007 | US20070000665 Isolation assembly for coiled tubing |
| 01/03/2007 | CN2854066Y Pressure non-return gate gurgle valve |
| 01/03/2007 | CN2854065Y Hydraulic control water plugging switching device |
| 01/03/2007 | CN2854064Y Circulating valve |
| 01/03/2007 | CN1890453A Method and system for injecting a treatment fluid into a well |
| 01/02/2007 | US7156578 Aquifer recharge valve and method |
| 01/02/2007 | US7156183 Electric hydraulic power unit and method of using same |
| 12/28/2006 | US20060289156 Lateral control system |
| 12/27/2006 | CN2851574Y Rupture disc controlled type spherical downhole shut-in valve |
| 12/27/2006 | CN2851555Y Oil pipe lifting and rotating oil-drainage device |
| 12/27/2006 | CN2851554Y Sliding sleeve pressure-conducting valve |
| 12/27/2006 | CN2851553Y Butterfly valve controller |
| 12/27/2006 | CN2851552Y Well-plugging pressure-release device for oil-water well head casing |
| 12/27/2006 | CN2851551Y Opener for drill rod and check valve |
| 12/27/2006 | CN2851550Y Novel multifunctional oil thief end cap |
| 12/26/2006 | US7152688 Positioning tool with valved fluid diversion path and method |
| 12/26/2006 | US7152687 Expandable tubular with port valve |
| 12/26/2006 | US7152680 Slickline power control interface |
| 12/26/2006 | US7152678 System and method for downhole operation using pressure activated valve and sliding sleeve |
| 12/26/2006 | US7152676 Techniques and systems associated with perforation and the installation of downhole tools |
| 12/21/2006 | WO2006134508A1 Flow reversing apparatus and methods of use |
| 12/21/2006 | WO2006134446A2 Novel activating mechanism for controlling the operation of a downhole tool |
| 12/21/2006 | WO2006101618A3 Hydraulically controlled burst disk subs (hcbs) |
| 12/21/2006 | US20060283602 Mounts for blowout preventer bonnets |
| 12/21/2006 | US20060283600 Electric-hydraulic power unit |
| 12/21/2006 | CA2612285A1 Novel activating mechanism for controlling the operation of a downhole tool |
| 12/21/2006 | CA2610563A1 Flow reversing apparatus and methods of use |
| 12/20/2006 | CN2849149Y Automatic switching three way circulation connector for oil well |
| 12/20/2006 | CN2849148Y Freezing proof valve |
| 12/20/2006 | CN2849147Y Single flow valve of magnetic attraction type oil field water pouring well |
| 12/20/2006 | CN2849139Y Solar energy automatic gas extraction well head device |
| 12/20/2006 | CN2849129Y Lift short connecting type rotary operation water tap |
| 12/19/2006 | US7150326 Bi-directional ball seat system and method |
| 12/19/2006 | US7150318 Apparatus for actuating a well tool and method for use of same |
| 12/19/2006 | CA2385543C Valve for use in wells |
| 12/14/2006 | WO2006133313A1 Downhole pressure containment system |
| 12/14/2006 | US20060278399 Multi-Drop Flow Control Valve System |
| 12/13/2006 | CN2846746Y Steam thermal recovery associated injector |
| 12/13/2006 | CN2846745Y Double cylindrical pump outlet connector |
| 12/13/2006 | CN2846742Y Positioning cementing well water injection ement switch |
| 12/13/2006 | CN2846732Y Non-casting ball type blocking pressure signle flow device |
| 12/13/2006 | CN2846731Y Wellhead mounting valve with heat tracing |
| 12/13/2006 | CN2846729Y Controllable injecting cement circulation device |
| 12/13/2006 | CN2846728Y Double position type Faner well cementing tool |
| 12/13/2006 | CN1289785C Method for solving air screw drill runaway problem and pneumatic speed limiting valve device |
| 12/12/2006 | US7147059 Use of downhole high pressure gas in a gas-lift well and associated methods |
| 12/12/2006 | US7147052 Hyraulically releasable inflation tool for permanent bridge plug |
| 12/12/2006 | CA2398715C Sequential hydraulic control system for use in subterranean well |
| 12/12/2006 | CA2216430C Hydrocarbon production using multilateral well bores |
| 12/07/2006 | US20060272825 Downhole ball circulation tool |
| 12/07/2006 | US20060272824 Downhole flapper circulation tool |
| 12/07/2006 | US20060272823 Well operations system |
| 12/07/2006 | US20060272822 Well operations system |
| 12/06/2006 | CN2844423Y Well sieve-tube circulation Verue |
| 12/06/2006 | CN2844417Y Automatically-balanced pressure-differential construction valve of double-pipe external packer |
| 12/06/2006 | CN2844404Y Anchoring oil releaser of oil pipe |
| 12/05/2006 | US7145471 Sequential hydraulic control system for use in a subterranean well |
| 12/05/2006 | US7143831 Apparatus for releasing a ball into a wellbore |
| 12/05/2006 | US7143830 Apparatus and method for installation of subsea well completion systems |
| 12/05/2006 | CA2374152C System for pressure testing tubing |
| 12/01/2006 | CA2547254A1 Downhole flapper circulation tool |
| 11/30/2006 | US20060266527 Apparatus for radially expanding and plastically deforming a tubular member |
| 11/29/2006 | EP1726775A1 System and method for fluid control in expandable tubing |
| 11/29/2006 | EP1322837B1 Improved well testing system |
| 11/29/2006 | CN2841952Y Circular flow-path anti-freeze well head device |
| 11/29/2006 | CN2841951Y Flow-limiting water-mixing valve |
| 11/29/2006 | CN2841950Y Oil well water injection regulating valve |
| 11/29/2006 | CN2841947Y Telescopic wellhead production valve anti-theft device |
| 11/29/2006 | CN1869396A Multifunction pressure releasing regulator for water injection well |
| 11/23/2006 | WO2006124024A1 Single line control module for well tool actuation |
| 11/22/2006 | CN1865653A Oil-drainage device of oil well |
| 11/22/2006 | CN1865652A Anti-theft sampling valve |