| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 10/13/2009 | CA2463774C Slickline power control interface |
| 10/13/2009 | CA2416116C Method and apparatus for formation damage removal |
| 10/08/2009 | WO2009123805A2 Methods and devices for isolating wellhead pressure |
| 10/08/2009 | WO2009123746A1 Method for hydraulic rupturing of downhole glass disc |
| 10/08/2009 | US20090250225 Control of downhole devices in a wellbore |
| 10/08/2009 | US20090250224 Phase Change Fluid Spring and Method for Use of Same |
| 10/08/2009 | US20090250222 Reverse flow in-flow control device |
| 10/08/2009 | CA2718832A1 System and method for recompletion of old wells |
| 10/08/2009 | CA2713225A1 Methods and devices for isolating wellhead pressure |
| 10/07/2009 | EP2107210A2 Valve, core sampling apparatus and method |
| 10/07/2009 | CN201321840Y Constant pressure valve used for oil field well completion |
| 10/07/2009 | CN201321834Y Underground self-sealing by-pass switch |
| 10/06/2009 | US7597151 Hydraulically operated formation isolation valve for underbalanced drilling applications |
| 10/06/2009 | US7597150 Water sensitive adaptive inflow control using cavitations to actuate a valve |
| 10/06/2009 | US7597149 Safety valve with extension springs |
| 10/06/2009 | US7596996 Christmas tree with internally positioned flowmeter |
| 10/06/2009 | CA2582469C Downhole safety valve apparatus and method |
| 10/06/2009 | CA2567524C Slidable sleeve plunger |
| 10/04/2009 | CA2660591A1 Ballistically compatible backpressure valve |
| 10/02/2009 | CA2660919A1 Flapper latch |
| 10/01/2009 | WO2009120581A2 Multiple spring subsurface safety valve |
| 10/01/2009 | WO2009120446A2 Internal lockdown snubbing plug |
| 10/01/2009 | WO2008104179A8 Drilling head for reborinq a stuck valve |
| 10/01/2009 | US20090242211 Methods and apparatus for a downhole tool |
| 10/01/2009 | US20090242210 Downhole fluid recirculation valve |
| 10/01/2009 | US20090242209 Safety valve torsional spring assembly and method |
| 10/01/2009 | US20090242208 Dead string completion assembly with injection system and methods |
| 10/01/2009 | US20090242206 Subsurface valve having an energy absorption device |
| 09/30/2009 | EP2105576A1 Tubular filling system |
| 09/30/2009 | CN201318151Y Downhole switch, switch tube thereof and switch controller |
| 09/30/2009 | CN201318150Y Device for testing, extricating and plugging under well |
| 09/30/2009 | CN100545414C Method and system for injecting a treatment fluid into a well |
| 09/29/2009 | US7594552 Expandable reamer apparatus for enlarging boreholes while drilling |
| 09/29/2009 | US7594542 Alternate path indexing device |
| 09/28/2009 | CA2749138A1 Methods and apparatus for a downhole tool |
| 09/24/2009 | WO2009117297A2 Actuatable subsurface safety valve and method |
| 09/24/2009 | WO2009116875A1 Well plug |
| 09/24/2009 | WO2009116869A2 Cleaning tool |
| 09/24/2009 | WO2009115839A1 Hydraulic bi-directional rotary isolation valve |
| 09/24/2009 | US20090236099 Multiple Spring Subsurface Safety Valve |
| 09/24/2009 | CA2843013A1 Hydraulic bi-directional rotary isolation valve |
| 09/24/2009 | CA2718625A1 Hydraulic bi-directional rotary isolation valve |
| 09/23/2009 | EP2103776A2 System and method for selectively communicatable hydraulic nipples |
| 09/23/2009 | EP2102448A1 Safety valve with flapper/flow tube friction reducer |
| 09/23/2009 | CN101539018A Deep seafloor sampling device |
| 09/23/2009 | CN101538997A Underground well valve with integrated sensor |
| 09/23/2009 | CN101538996A Remote and pulse controlled corner electric valve |
| 09/23/2009 | CN101538995A Method for replacing valve by utilizing borehole pressure |
| 09/22/2009 | US7591317 Tubing pressure insensitive control system |
| 09/22/2009 | CA2569059C Pressure monitoring of control lines for tool position feedback |
| 09/22/2009 | CA2485973C Equalizer valve |
| 09/17/2009 | WO2009114356A1 Systems, assemblies and processes for controlling tools in a well bore |
| 09/17/2009 | WO2009113875A2 Bellows valve |
| 09/17/2009 | WO2009113872A2 Device for fixing a valve to a tubular member |
| 09/17/2009 | WO2009085732A3 Mechanical actuator with electronic adjustment |
| 09/17/2009 | WO2009073357A3 High differential shifting tool |
| 09/17/2009 | US20090229834 System and Method for Selectively Communicatable Hydraulic Nipples |
| 09/17/2009 | US20090229833 Injection valve |
| 09/17/2009 | US20090229830 Subsea well production system |
| 09/17/2009 | US20090229829 Hydraulic Bi-Directional Rotary Isolation Valve |
| 09/17/2009 | US20090229828 Radial flow valve |
| 09/17/2009 | US20090229814 Actuatable subsurface safety valve and method |
| 09/17/2009 | CA2750420A1 System and method for selectively communicatable hydraulic nipples |
| 09/17/2009 | CA2718215A1 Bellows valve |
| 09/17/2009 | CA2717861A1 Device for fixing a valve to a tubular member |
| 09/17/2009 | CA2717858A1 System and method for controlling the flow of fluid in branched wells |
| 09/17/2009 | CA2717198A1 Systems, assemblies and processes for controlling tools in a well bore |
| 09/16/2009 | CN201310323Y Air-tight switch |
| 09/16/2009 | CN201310322Y Oil gathering valve group |
| 09/16/2009 | CN101532391A In-hole drilling tool integrating drilling, slotting and punching coal seam and using method thereof |
| 09/16/2009 | CN101532376A Variable-nozzle assembly for a turbocharger |
| 09/15/2009 | CA2595029C Downhole drilling apparatus and method for use of same |
| 09/15/2009 | CA2524836C System and method for fail-safe disconnect from a subsea well |
| 09/15/2009 | CA2486682C A downhole tool for use in a wellbore |
| 09/14/2009 | WO2009151684A2 Temperature triggered actuator |
| 09/14/2009 | CA2752535A1 Temperature triggered actuator |
| 09/11/2009 | WO2009111192A2 Multi-cycle single line switch |
| 09/11/2009 | WO2009088621A3 Delayed acting gravel pack fluid loss valve |
| 09/11/2009 | WO2009076334A3 Zonal isolation of telescoping perforation appartus with memory based material |
| 09/11/2009 | WO2009055402A3 Tubing retrievable capillary bypass safety valve and capillary injection sleeve |
| 09/11/2009 | WO2008101021A8 Tool and method for establishing hydraulic communication with a subsurface safety valve |
| 09/10/2009 | US20090223663 Systems, assemblies and processes for controlling tools in a well bore |
| 09/09/2009 | EP2098682A2 Electronic completion installation valve |
| 09/09/2009 | CN201306152Y Pressure-balancing pressure-testing valve |
| 09/09/2009 | CN201306151Y Filling type drilling safety valve for ocean oil |
| 09/09/2009 | CN201306150Y Screw drill by-pass valve |
| 09/09/2009 | CN201306149Y Wellhead safety hydraulic cutoff device |
| 09/09/2009 | CN201306148Y Unlocking device for oil-field high pressure water injection gate |
| 09/09/2009 | CN101529048A Downhole hydraulic control system with failsafe features |
| 09/08/2009 | US7584800 System and method for indexing a tool in a well |
| 09/05/2009 | CA2657160A1 Downhole fluid recirculation valve |
| 09/05/2009 | CA2623902A1 Downhole fluid recirculation valve |
| 09/03/2009 | WO2009108522A1 Phase-controlled well flow control and associated methods |
| 09/03/2009 | WO2009108059A2 Tubular member having self-adjusting valves controlling the flow of fluid into or out of the tubular member |
| 09/03/2009 | WO2009106875A2 Pressure actuable downhole tool and a method for actuating the same |
| 09/03/2009 | WO2009067485A3 Circulation sub with indexing mechanism |
| 09/03/2009 | US20090218104 Electronic completion installation valve |
| 09/03/2009 | US20090218103 Method for Flow Control and Autonomous Valve or Flow Control Device |
| 09/03/2009 | US20090218102 Multi-Cycle Single Line Switch |
| 09/03/2009 | US20090218101 Apparatus and method for inflow control |