| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
|---|
| 12/25/2007 | US7311153 Flow-biased sequencing valve |
| 12/21/2007 | WO2007145530A1 Method and device for control of actuators |
| 12/20/2007 | US20070289745 Plug Setting and Retrieving Apparatus |
| 12/20/2007 | US20070289734 Wellbore Valve Having Linear Magnetically Geared Valve Actuator |
| 12/19/2007 | EP1867832A1 Choke valve for fluid injection in geological formations |
| 12/19/2007 | CN200993007Y Oil well testing gate valve |
| 12/19/2007 | CN200992999Y Fire flooding stratified downhole gas (steam) injection converting device |
| 12/19/2007 | CN200992987Y Throttle valve mechanism |
| 12/19/2007 | CN200992986Y Pump pressure regulator |
| 12/19/2007 | CN200992985Y Dual-wall drilling downhole flow dividing valve |
| 12/19/2007 | CN200992984Y Oil pumping well casing air release device |
| 12/18/2007 | US7308943 Well operations system |
| 12/18/2007 | US7308937 Expandable reamer apparatus for enlarging boreholes while drilling and methods of use |
| 12/18/2007 | US7308902 Subsea valve assembly with replaceable fixed orifice insert |
| 12/18/2007 | CA2489300C A valve for a fill up tool |
| 12/18/2007 | CA2425604C Gas operated pump for use in a wellbore |
| 12/18/2007 | CA2343910C Improved ball valve |
| 12/14/2007 | CA2591317A1 Throttle valve for injecting a fluid into geological formations |
| 12/13/2007 | US20070285275 Remote Actuation of a Downhole Tool |
| 12/13/2007 | US20070284119 Dual flapper barrier valve |
| 12/13/2007 | US20070284118 Controlling Actuation of Tools in a Wellbore with a Phase Change Material |
| 12/13/2007 | US20070284111 Shear Type Circulation Valve and Swivel with Open Port Reciprocating Feature |
| 12/12/2007 | CN200989189Y Blowout preventing drip |
| 12/12/2007 | CN200989188Y Double-stage base seal connecting vessels |
| 12/12/2007 | CN101087926A Expansion pig |
| 12/12/2007 | CN100354499C Automatic switching three-way circulation joint for oil well |
| 12/12/2007 | CA2591360A1 Dual flapper barrier valve |
| 12/11/2007 | US7306043 System and method to control multiple tools through one control line |
| 12/06/2007 | WO2007140310A1 Shear type circulation valve and swivel with open port reciprocating feature |
| 12/06/2007 | US20070277878 Chemical injection check valve incorporated into a tubing retrievable safety valve |
| 12/06/2007 | CA2585743A1 Systems and methods for completing a multiple zone well |
| 12/05/2007 | CN200985773Y Oil well intelligent anti-pollution device |
| 12/05/2007 | CN200985772Y Double-walled well drilling single flow valve |
| 12/05/2007 | CN200985771Y Low pressure gas generating field well head emergency cut-out valve |
| 12/05/2007 | CN100353022C Surface flow controlled valve and screen |
| 12/04/2007 | US7302842 Method and device for measuring a path that has been covered |
| 11/29/2007 | US20070272413 Technique and apparatus for completing multiple zones |
| 11/29/2007 | US20070272412 Downhole Tool |
| 11/29/2007 | DE112005002969T5 Hybridsteuerungssystem und -verfahren Hybrid control system and method |
| 11/28/2007 | EP1860276A1 Ball valve |
| 11/28/2007 | CN200982181Y Circulation sliding sleeve for oil gas field |
| 11/28/2007 | CN200982180Y Throttling control device for down-hole oil pipe |
| 11/28/2007 | CN200982179Y Gas drilling tool relief valve |
| 11/28/2007 | CN200982178Y Under balance drilling automatic throttle valve |
| 11/28/2007 | CN200982169Y Sectional pressing type oil pipe discharging anchoring device |
| 11/27/2007 | US7299880 Surge reduction bypass valve |
| 11/27/2007 | US7299866 Apparatus and method for cleaning out sand from an underbalanced hydrocarbon producing well |
| 11/27/2007 | CA2524554C Electrical energy from a wellbore light cell |
| 11/27/2007 | CA2460712C Pass through valve and stab tool |
| 11/27/2007 | CA2264632C Wellbores utilizing fiber optic-based sensors and operating devices |
| 11/27/2007 | CA2188540C Hydraulic power stroker for shifting of sliding sleeves |
| 11/23/2007 | CA2585739A1 Flow control system for use in a wellbore |
| 11/22/2007 | WO2007109489A3 Subsurface safety valve with closure provided by the flowing medium |
| 11/22/2007 | WO2002079659A3 Method for preventing critical annular pressure buildup |
| 11/21/2007 | EP1857633A2 Flow control apparatus for use in a wellbore |
| 11/21/2007 | CN200978652Y Hydraulic control under-balanced downhole casing valve |
| 11/21/2007 | CN200978651Y Pressure relief coupler |
| 11/21/2007 | CN200978646Y Permanent-magnet anti-theft multifunctional well mouth device |
| 11/20/2007 | US7296633 Flow control apparatus for use in a wellbore |
| 11/20/2007 | US7296624 Pressure control apparatus and method |
| 11/20/2007 | CA2489235C Plug concealment and diversion tool |
| 11/18/2007 | CA2583922A1 Kickover tool and selective mandrel system |
| 11/15/2007 | WO2007129234A1 Method and tool for unblocking a control line |
| 11/15/2007 | CA2650977A1 Method and tool for unblocking a control line |
| 11/14/2007 | EP1855080A2 Method and device for measuring a distance travelled |
| 11/14/2007 | EP1853791A1 System and method for well intervention |
| 11/14/2007 | CN200975232Y Automatically mud grouting controlling valve for casing |
| 11/14/2007 | CN200975227Y Oil pipe blowout prevention blocking equipment of oil gas well |
| 11/14/2007 | CN101070753A Anti-theft oil-production tree |
| 11/13/2007 | US7295491 High impact communication and control system |
| 11/13/2007 | CA2403881C Tubing hanger system with gate valve |
| 11/11/2007 | CA2585358A1 Downhole electrical-to-hydraulic conversion module for well completions |
| 11/08/2007 | WO2007125335A1 Bi-directional flapper valve |
| 11/08/2007 | US20070256840 Method and Actuator Device |
| 11/08/2007 | US20070256829 Apparatus for wellbore communication |
| 11/08/2007 | CA2681389A1 Bi-directional flapper valve |
| 11/07/2007 | CN200971769Y Pumping well oil drainage tubular pipe |
| 11/07/2007 | CN200971768Y Stop valve capable of measuring pressure |
| 11/07/2007 | CN200971767Y Phi-15 double valve seat automatic control valve |
| 11/06/2007 | US7290606 Inflow control device with passive shut-off feature |
| 11/06/2007 | CA2418530C Method and system for performing an operation in a well |
| 11/01/2007 | WO2007124374A2 Well tools with actuators utilizing swellable materials |
| 11/01/2007 | WO2007123909A2 Downhole flow control apparatus, operable via surface applied pressure |
| 11/01/2007 | US20070251697 Alternate Path Indexing Device |
| 11/01/2007 | US20070251696 Rotary Actuator Mechanism For A Downhole Tool |
| 11/01/2007 | CA2649525A1 Mechanical parts having increased wear resistance |
| 10/31/2007 | EP1848875A1 Flow regulator for use in a subterranean well |
| 10/31/2007 | CN200968212Y Thick oil single flow valve |
| 10/31/2007 | CN200968200Y Multi-level pulse perforating peak pressure controlling valve |
| 10/31/2007 | CN200968199Y Oil well casing-pressure regulating apparatus |
| 10/31/2007 | CN200968196Y Non sieve tube weighing drill stem plug capturing blowout preventer |
| 10/31/2007 | CN200968192Y Coal bed gas well head arrangement |
| 10/30/2007 | US7287596 Method and apparatus for stimulating hydrocarbon wells |
| 10/30/2007 | US7287595 Electric-hydraulic power unit |
| 10/30/2007 | US7287589 Well treatment system and method |
| 10/30/2007 | US7287544 Triple valve blow out preventer |
| 10/30/2007 | CA2455202C Downhole actuator apparatus and method |
| 10/30/2007 | CA2442666C Fibre optic well control system |
| 10/30/2007 | CA2440624C System and method for controlling downhole tools |
| 10/25/2007 | US20070246225 Well tools with actuators utilizing swellable materials |