| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 10/25/2007 | US20070246220 Retrievable Tubing Hanger Installed Below Tree |
| 10/25/2007 | US20070246219 Seal for a fluid assembly |
| 10/25/2007 | US20070246218 Safety valve having mono spring closure mechanism |
| 10/24/2007 | EP1847680A1 Safety valve having mono spring closure mechanism |
| 10/24/2007 | CN200964854Y Anti-theft sampling valve lock and key thereof |
| 10/24/2007 | CN200964828Y Mechanical type forced-open tool for under-balanced downhole casing valve |
| 10/24/2007 | CN200964827Y Hydraulic type forced-open tool for under-balanced downhole casing valve |
| 10/24/2007 | CN200964826Y Under-balanced downhole casing valve capable of permanently locking |
| 10/24/2007 | CN200964825Y Blowout prevention plug for oil well pipe |
| 10/24/2007 | CN200964824Y Oil well port integrated valve for oil extraction of oil field |
| 10/24/2007 | CN200964819Y Well port oil gas mixed flow device |
| 10/24/2007 | CN200964818Y Oil production wellport anti-theft device |
| 10/24/2007 | CN101061289A Cast flapper with hot isostatic pressing treatment |
| 10/23/2007 | US7284619 Packer with positionable collar |
| 10/23/2007 | US7284612 Controlling transient pressure conditions in a wellbore |
| 10/23/2007 | CA2468730C Closure mechanism with integrated actuator for subsurface valves |
| 10/23/2007 | CA2262911C Method and apparatus for the downhole metering and control of fluids produced from wells |
| 10/18/2007 | WO2007116264A1 System and method for remotely controlling down-hole operations |
| 10/18/2007 | US20070240883 Downhole Tool |
| 10/17/2007 | CN200961469Y Three-layer water exploitation switch valve for pumping well of oil field |
| 10/17/2007 | CN200961468Y Reverse irrigation-proof mechanical type inverted valve of pumping well |
| 10/17/2007 | CN200961467Y Inverted valve for preventing oil-theft |
| 10/17/2007 | CN200961466Y Skid-mounted polymer injection high pressure distribution valve set |
| 10/17/2007 | CN100343477C Fast valve actuator and tool provided with same |
| 10/16/2007 | US7283060 Control apparatus for automated downhole tools |
| 10/16/2007 | US7281584 Multi-cycle downhill apparatus |
| 10/11/2007 | US20070235199 Methods and apparatus for actuating a downhole tool |
| 10/10/2007 | CN100342116C Self-adaptive laminated distributor under well |
| 10/09/2007 | CA2240140C Wye block having a rotary guide incorporated therein |
| 10/04/2007 | US20070227739 Gas Lift Valve for High Pressure Operation |
| 10/04/2007 | US20070227738 Communication tool for accessing a non annular hydraulic chamber of a subsurface safety valve |
| 10/03/2007 | CN200955378Y Full-bore low-resistance detection back-washing valve |
| 10/03/2007 | CN200955377Y Flatboard valve type ball injector |
| 10/03/2007 | CN200955369Y Large-full-bore crack well-head protector |
| 10/02/2007 | US7275606 Solids strainer system for a hydraulic choke |
| 10/02/2007 | US7275591 Tubing hanger with ball valve in production string |
| 09/27/2007 | WO2007109489A2 Subsurface safety valve with closure provided by the flowing medium |
| 09/27/2007 | WO2007108703A1 Wellbore tool for filling, circulating and backflowing fluids |
| 09/27/2007 | US20070221413 Flow system for a hydraulic choke solids Strainer |
| 09/27/2007 | US20070221407 Permanent downhole deployment of optical sensors |
| 09/27/2007 | US20070221381 Liquid removal system and method |
| 09/26/2007 | EP1718842B1 Method and actuator device |
| 09/26/2007 | CN200952384Y Constant gas injection valve |
| 09/26/2007 | CN200952383Y Air drilling underwell fire-extinguishing valve |
| 09/26/2007 | CN200952382Y Top pulling flexible resetting self-cementing floating hoop |
| 09/26/2007 | CN200952381Y Charging self-releasing ball seak |
| 09/26/2007 | CN200952380Y Ground adjustable flow nipple |
| 09/26/2007 | CN200952379Y High pressure pollution removal throttle pipe collection |
| 09/26/2007 | CN200952374Y Multifunction gas production well head device |
| 09/25/2007 | US7273107 Valve within a control line |
| 09/25/2007 | CA2492354C Flow control valve |
| 09/25/2007 | CA2470436C Interventionless bi-directional barrier |
| 09/25/2007 | CA2243795C Flow control apparatus for use in a subterranean well and associated methods |
| 09/25/2007 | CA2229120C Methods of completing a subterranean well and associated apparatus |
| 09/20/2007 | WO2007047800A3 Apparatus and method for managed pressure drilling |
| 09/20/2007 | US20070215387 Solids strainer system for a hydraulic choke |
| 09/20/2007 | US20070215356 Dual check valve |
| 09/19/2007 | CN200949448Y Full sealing three position four-way valve safety clutching board of drilling blowout preventer remote control console. |
| 09/19/2007 | CN200949447Y Petroleum wellhead gate valve |
| 09/19/2007 | CN200949439Y Oil pipe hanger device with cut-off valve |
| 09/19/2007 | CN101037932A Hydraulic grief stem cock valve switching tools |
| 09/19/2007 | CN101037929A Well drilling blowout prevention killing well joint |
| 09/18/2007 | US7270191 Flapper opening mechanism |
| 09/18/2007 | US7270181 Downhole surge pressure reduction and filtering apparatus |
| 09/18/2007 | CA2393504C Flow control in a wellbore |
| 09/18/2007 | CA2334115C A device and method for regulating fluid flow in a well |
| 09/17/2007 | CA2581622A1 Dual check valve |
| 09/17/2007 | CA2540499A1 Dual check valve |
| 09/13/2007 | WO2007075860A9 Gas wellhead extraction system and method |
| 09/13/2007 | US20070209802 Downhole trigger device |
| 09/12/2007 | EP1346128B1 Adjustable stabiliser for directional drilling |
| 09/12/2007 | CN200946485Y Oil draining device |
| 09/12/2007 | CN200946484Y Upper-pull type rigid reset self-grouting floating hoop |
| 09/12/2007 | CN200946482Y Opening or closing device for cement injecting device |
| 09/11/2007 | US7267178 Fluid system component with sacrificial element |
| 09/11/2007 | US7267177 Tubing fill and testing valve |
| 09/06/2007 | US20070205000 Instrumentation for a downhole deployment valve |
| 09/06/2007 | US20070204999 Completion Suspension Valve System |
| 09/06/2007 | US20070204995 Remotely operated selective fracing system |
| 09/06/2007 | US20070204993 Method for drilling and casing a wellbore with a pump down cement float |
| 09/05/2007 | CN200943485Y Multiple well thick oil metering control system |
| 09/05/2007 | CN200943466Y Low torque kelly bar cock valve |
| 09/05/2007 | CN200943465Y Multi-functional crude oil theft-proof device |
| 09/04/2007 | US7264059 Method and device for pressure controlled sequential operation |
| 09/04/2007 | CA2384661C A device in a subsea system for controlling a hydraulic actuator and a subsea system with a hydraulic actuator |
| 09/02/2007 | CA2756093A1 Rotating control head radial seal protection and leak detection systems |
| 09/02/2007 | CA2756090A1 Rotating control head radial seal protection and leak detection systems |
| 08/30/2007 | US20070199715 Subsea well intervention |
| 08/29/2007 | EP1825176A1 Axially energisable ball valve |
| 08/29/2007 | CN200940476Y Water injection ball base |
| 08/29/2007 | CN200940471Y Slide valve type oil drain device |
| 08/29/2007 | CN200940470Y Under balance underground sleeve valve capable of measuring bottom hole pressure |
| 08/29/2007 | CN200940469Y Flow pipe net of separate production and separate transport wellhead |
| 08/29/2007 | CN101025079A Leakage-free double-valve dreg-preventing device |
| 08/29/2007 | CN100334323C Water-blending process device |
| 08/28/2007 | US7261161 Well testing system |
| 08/28/2007 | CA2491293C Method and apparatus for remote control of multilateral wells |
| 08/23/2007 | WO2007095221A1 Method and system for controlling a downhole flow control device |
| 08/23/2007 | US20070193733 Downhole Actuation Tools |
| 08/22/2007 | CN2937468Y Decompression device of well working blow-out preventer |