| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 05/18/2006 | WO2006051250A1 Remote actuation of a downhole tool |
| 05/18/2006 | WO2005014973A3 Drive device for an actuating member |
| 05/18/2006 | WO2005001233A3 Improved horizontal tree assembly |
| 05/18/2006 | US20060102358 Fluid system component with sacrificial element |
| 05/18/2006 | US20060102357 Electric hydraulic power unit and method of using same |
| 05/18/2006 | CA2584973A1 Method and apparatus |
| 05/16/2006 | US7044229 Downhole valve device |
| 05/16/2006 | CA2186180C Well completion system and method |
| 05/11/2006 | WO2006048629A1 Safety valve |
| 05/11/2006 | WO2006048616A1 Low power actuator and valve-actuator combination |
| 05/11/2006 | CA2586192A1 Safety valve |
| 05/10/2006 | CN2779065Y Multifunctional lock valve pressure testing and sampling device |
| 05/10/2006 | CN2779055Y Well mouth spout proof valve for removing bottom oil pipe |
| 05/10/2006 | CN2779043Y Sand flushing drill plug circulator |
| 05/09/2006 | US7040409 Safety valve for oil wells |
| 05/09/2006 | US7040408 Flowhead and method |
| 05/09/2006 | CA2425418C Expandable lockout for a subsurface safety valve |
| 05/04/2006 | US20060090906 Apparatus and method for wellbore isolation |
| 05/03/2006 | EP1653040A1 Downhole tool and method for use of the same |
| 05/03/2006 | EP1412612B1 Downhole actuation system utilizing electroactive fluids |
| 05/03/2006 | CN2777194Y Oil drainage apparatus used specially for oil-field deep well |
| 05/03/2006 | CN2777182Y Sand-proof and well washing valve |
| 05/03/2006 | CN1768190A Surface flow controlled valve and screen |
| 05/03/2006 | CN1766281A Automatic switching three-way circulation joint for oil well |
| 05/02/2006 | US7036611 Expandable reamer apparatus for enlarging boreholes while drilling and methods of use |
| 05/02/2006 | US7036594 Controlling a pressure transient in a well |
| 05/02/2006 | US7036582 Expansion cone for radially expanding tubular members |
| 05/02/2006 | CA2403860C Tubing head seal assembly |
| 04/27/2006 | WO2006045098A1 Downhole fluid loss control apparatus |
| 04/27/2006 | WO2006043999A2 Cast flapper with hot isostatic pressing treatment |
| 04/27/2006 | US20060086509 Redundant Hydraulic System for Safety Valve |
| 04/27/2006 | CA2571936A1 Cast flapper with hot isostatic pressing treatment |
| 04/25/2006 | US7032675 Thermally-controlled valves and methods of using the same in a wellbore |
| 04/25/2006 | US7032672 Subsurface safety valve having a communication tool accessible non annular hydraulic chamber |
| 04/25/2006 | US7032666 Gravel pack crossover tool with check valve in the evacuation port |
| 04/25/2006 | CA2166907C Whipstock assembly for a sleeved casing |
| 04/20/2006 | WO2006042060A2 Downhole safety valve apparatus and method |
| 04/20/2006 | WO2006040592A1 Ball valve |
| 04/20/2006 | WO2006000799A3 Valve |
| 04/20/2006 | CA2583806A1 Improved ball valve |
| 04/19/2006 | CN2773307Y Adjuster of circular free cover pressure discharge valve of pumping well |
| 04/18/2006 | US7028778 Fluid system component with sacrificial element |
| 04/18/2006 | CA2197260C Electro hydraulic downhole control device |
| 04/18/2006 | CA2187434C Computer controlled downhole tools for production well control |
| 04/18/2006 | CA2187424C Method and apparatus for the remote control and monitoring of production wells |
| 04/13/2006 | US20060076149 Downhole Safety Valve Assembly Having Sensing Capabilities |
| 04/13/2006 | US20060076146 Generating Downhole Power |
| 04/13/2006 | US20060076130 Tubing annulus plug valve |
| 04/12/2006 | CN2771469Y Efficient forced-closed deep well pump fixed valve |
| 04/11/2006 | US7025146 Alternative packer setting method |
| 04/11/2006 | US7025133 Multiple bore christmas tree outlet |
| 04/11/2006 | US7025132 Flow completion apparatus |
| 04/11/2006 | US7025131 Electrical tubing control and remediation apparatus and method of use |
| 04/11/2006 | CA2391186C Check enhancer |
| 04/11/2006 | CA2390133C Hydraulically set straddle packers |
| 04/11/2006 | CA2274203C Method and apparatus for positioning and repositioning a plurality of service tools downhole without rotation |
| 04/06/2006 | WO2005040544A3 Internal blow out preventer ball and seat |
| 04/06/2006 | US20060070744 Pressure actuated tubing safety valve |
| 04/05/2006 | EP1642002A1 Downhole Data Communication |
| 04/05/2006 | EP1116350B1 Drill string telemetry with insulator between receiver and transmitter |
| 04/05/2006 | EP0668959B1 Method and apparatus for gravel packing a well |
| 04/05/2006 | CN2769504Y Separating drip |
| 04/05/2006 | CN1249327C Sand screen with integrated sensors |
| 04/04/2006 | US7021389 Bi-directional ball seat system and method |
| 04/04/2006 | US7021386 Safety valve having extension spring closure mechanism |
| 04/04/2006 | US7021385 Method and apparatus for controlling well pressure in open-ended casing |
| 04/04/2006 | US7021384 Apparatus and method for wellbore isolation |
| 03/29/2006 | EP1640559A1 Wireline retrievable safety valve with radial cutting device |
| 03/29/2006 | EP1640558A1 Wireline retrievable safety valve with radial cutting device |
| 03/29/2006 | EP1639230A1 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 03/29/2006 | EP1570153B1 Downhole safety valve for central circulation completion system |
| 03/29/2006 | CN2767656Y Large path downhole injection valve |
| 03/29/2006 | CN2767655Y Oil collection controller for oil extraction well mouth |
| 03/29/2006 | CN2767644Y By-pass valve |
| 03/28/2006 | US7017682 Drill string shutoff valve |
| 03/28/2006 | US7017672 Self-set bridge plug |
| 03/22/2006 | EP1516104B1 A valve for a fill up tool |
| 03/22/2006 | EP1423583B1 Adjustable well screen assembly |
| 03/22/2006 | CN2766033Y Multifunctional downhole stratum protector |
| 03/22/2006 | CN2766032Y Self-sealing type rod and tube safety valve in screw pump oil extraction system |
| 03/21/2006 | US7013980 Hydraulically actuated control system for use in a subterranean well |
| 03/21/2006 | US7013970 Central circulation completion system |
| 03/21/2006 | CA2376443C Electrical surface activated downhole circulating sub |
| 03/21/2006 | CA2210287C Method for injecting fluid into a wellbore |
| 03/15/2006 | CN2764932Y Automatic leak-proof valve with kelly bar |
| 03/15/2006 | CN2764931Y Turning-plate type block-proof valve |
| 03/15/2006 | CN1748072A Actuator for well-head valve or other similar applications and system incorporating same |
| 03/15/2006 | CN1746461A Self-adaptive laminated distributor under well |
| 03/14/2006 | US7011161 Structural support |
| 03/14/2006 | US7011153 Hydraulically released inflation tool for permanent bridge plug |
| 03/09/2006 | US20060052903 Controller system for downhole applications |
| 03/09/2006 | US20060048949 Electric pressure actuating tool and method |
| 03/09/2006 | US20060048942 Flow control device for an injection pipe string |
| 03/09/2006 | US20060048936 Shape memory alloy for erosion control of downhole tools |
| 03/08/2006 | EP1632642A1 Hydraulically operated fluid metering apparatus for use in a subterranean well |
| 03/08/2006 | EP1632641A1 Hydraulically operated fluid metering apparatus for use in a subterranean well |
| 03/08/2006 | CN2763511Y Theft-proof oil sampler |
| 03/08/2006 | CN2763502Y Adjustable casing pressure determined gas-releasing oil overflow automatic open/close valve |
| 03/08/2006 | CN2763493Y External force type pressure testing releasing valve |
| 03/08/2006 | CN2763492Y Perforating oil producing and releasing combined pump valve |