| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 03/06/2013 | CN202767944U Pitching sliding sleeve used for sidetrack horizontal well staged fracturing |
| 03/06/2013 | CN202767943U Screw pump oil well safe pressure relief device |
| 03/06/2013 | CN202767935U Automatic blowout-prevention deviation-adjusting packer |
| 03/06/2013 | CN102953708A Bypass short joint capable of being activated and circulated repeatedly |
| 03/05/2013 | US8387710 Downhole fluid recirculation valve and method for recirculating fluid in a well |
| 03/01/2013 | CA2788166A1 Valve for hydraulic fracturing through cement outside casing |
| 03/01/2013 | CA2788164A1 Valve for hydraulic fracturing through cement outside casing |
| 02/28/2013 | WO2013028456A2 Composite inflow control device |
| 02/28/2013 | WO2013028402A2 Variable frequency fluid oscillators for use with a subterranean well |
| 02/28/2013 | WO2013028385A2 System and method for servicing a wellbore |
| 02/28/2013 | WO2013028384A2 Surface controlled subsurface safety valve |
| 02/28/2013 | WO2013028335A2 Downhole fluid flow control system having a fluidic module with a bridge network and method for use of same |
| 02/28/2013 | WO2013027081A1 A subsea wellhead assembly, a subsea installation using said wellhead assembly, and a method for completing a wellhead assembly |
| 02/28/2013 | WO2013003075A3 Apparatus to remotely actuate valves and method thereof |
| 02/28/2013 | WO2012166643A3 Safety valve system for cable deployed electric submersible pump |
| 02/28/2013 | WO2012166418A3 Safety valve system for cable deployed electric submersible pump |
| 02/28/2013 | WO2012107731A3 System and method for servicing a wellbore |
| 02/28/2013 | WO2012107730A3 A method for indivdually servicing a plurality of zones of a subterranean formation |
| 02/28/2013 | WO2011162846A3 Electronically actuated gate valve |
| 02/28/2013 | US20130054034 Method, device and system for monitoring subsea components |
| 02/28/2013 | US20130048312 Pipe End Plug Apparatus and Method |
| 02/28/2013 | US20130048304 Method of making and using multi-component disappearing tripping ball |
| 02/28/2013 | US20130048303 Chemical injection system |
| 02/28/2013 | US20130048302 Surface controlled subsurface safety valve |
| 02/28/2013 | US20130048301 Downhole Fluid Flow Control System and Method having Dynamic Response to Local Well Conditions |
| 02/28/2013 | US20130048300 Controlled Pressure Pulser For Coiled Tubing Applications |
| 02/28/2013 | US20130048299 Downhole Fluid Flow Control System Having a Fluidic Module with a Bridge Network and Method for Use of Same |
| 02/28/2013 | US20130048298 System and method for servicing a wellbore |
| 02/28/2013 | US20130048290 Injection of fluid into selected ones of multiple zones with well tools selectively responsive to magnetic patterns |
| 02/28/2013 | CA2844938A1 System and method for servicing a wellbore |
| 02/28/2013 | CA2844246A1 Downhole fluid flow control system having a fluidic module with a bridge network and method for use of same |
| 02/28/2013 | CA2843337A1 Variable frequency fluid oscillators for use with a subterranean well |
| 02/27/2013 | EP2561178A2 Intelligent completion system for extended reach drilling wells |
| 02/27/2013 | EP2561177A1 Method and apparatus for wellbore control |
| 02/27/2013 | CN202755955U Gravel packing string for horizontal wells |
| 02/27/2013 | CN202755947U Well completion sand prevention sliding sleeve |
| 02/27/2013 | CN202755946U Valve with pipeline pressure control device |
| 02/27/2013 | CN202755945U Improved fc plate valve |
| 02/27/2013 | CN202755944U Large diameter fracture well port device |
| 02/27/2013 | CN202755943U Insert mounting type mixed fluid sampling tube joint |
| 02/27/2013 | CN102943646A Pressure measuring ball valve for once multiple gravel pack tool |
| 02/27/2013 | CN101936145B Ball valve type oil reservoir protective valve and operation method thereof |
| 02/26/2013 | US8381821 Gas lift valve |
| 02/26/2013 | US8381817 Vortex controlled variable flow resistance device and related tools and methods |
| 02/21/2013 | WO2013025368A2 Tubing pressure insensitive pressure compensated actuator for a downhole tool and method |
| 02/21/2013 | WO2013025365A1 Selectively degradable passage restriction |
| 02/21/2013 | WO2013025364A2 System for enabling selective opening of ports |
| 02/21/2013 | WO2012167020A3 Subsea safety valve system |
| 02/21/2013 | WO2012121864A3 Check valve assembly for well stimulation operations |
| 02/21/2013 | WO2012087496A3 An exit assembly with a fluid director for inducing and impeding rotational flow of a fluid |
| 02/21/2013 | US20130043045 Flow stop valve |
| 02/21/2013 | US20130043044 Internal Blowout Preventer Apparatus |
| 02/21/2013 | US20130043043 High Flow Rate Multi Array Stimulation System |
| 02/21/2013 | US20130043042 Multiple Shift Sliding Sleeve |
| 02/21/2013 | US20130043041 Selectively degradable passage restriction |
| 02/21/2013 | US20130043040 System for enabling selective opening of ports |
| 02/21/2013 | US20130043039 Tubing pressure insensitive pressure compensated actuator for a downhole tool and method |
| 02/21/2013 | US20130043038 Debris barrier for hydraulic disconnect tools |
| 02/21/2013 | US20130043032 Valve for a Downhole Tool |
| 02/21/2013 | US20130043020 Method of drilling and running casing in large diameter wellbore |
| 02/21/2013 | CA2844516A1 Tubing pressure insensitive pressure compensated actuator for a downhole tool and method |
| 02/21/2013 | CA2841992A1 Selectively degradable passage restriction |
| 02/20/2013 | EP2559845A2 High flow rate multi array stimulation system |
| 02/20/2013 | EP2559843A2 Multiple shift sliding sleeve |
| 02/20/2013 | CN202745845U Multi-stage sliding sleeve fracturing device |
| 02/20/2013 | CN202745824U Self-control type oil well casing gas recovery device |
| 02/20/2013 | CN202745812U Differential pressure balancing type switch valve for horizontal wells |
| 02/20/2013 | CN202745811U On-pump oil pipe connecting device |
| 02/20/2013 | CN202745810U Setting control valve |
| 02/20/2013 | CN202745809U Emptying-free sampling valve for oil well |
| 02/20/2013 | CN202745808U Dismounting-prevention multipurpose drain valve |
| 02/20/2013 | CN202745807U Emergency cut-off protection device for wellhead remote control and adjustment |
| 02/20/2013 | CN202745806U Anti-blocking pin-ball self-rotating regulated watering valve |
| 02/20/2013 | CN202745762U Mining wind and water three-joint quick conversion valve |
| 02/20/2013 | CN102937012A Cement buoyant valve in gas pumping hole working sleeve and manufacture method thereof |
| 02/20/2013 | CN101793146B Method for testing strata of horizontal well |
| 02/19/2013 | US8376047 Variable flow restrictor for use in a subterranean well |
| 02/19/2013 | CA2785542A1 High flow rate multi array stimulation system |
| 02/19/2013 | CA2785510A1 Multiple shift sliding sleeve |
| 02/19/2013 | CA2785500A1 Valve for a downhole tool |
| 02/19/2013 | CA2683219C Method to control a main valve in a well |
| 02/14/2013 | WO2013022446A1 Externally adjustable inflow control device |
| 02/14/2013 | US20130037275 Wellbore Pressure Control Device |
| 02/14/2013 | US20130037273 Method and apparatus for wellbore control |
| 02/14/2013 | US20130037272 Method and system for well access to subterranean formations |
| 02/14/2013 | US20130037258 Activation-Device Launcher For A Cementing Head |
| 02/13/2013 | EP2556281A1 Device for electromechanical actuator |
| 02/13/2013 | CN202731865U Switchable fracturing sliding sleeve |
| 02/13/2013 | CN202731864U Rupture-proof packing tool |
| 02/13/2013 | CN202731847U Circulatory produced sliding sleeve |
| 02/13/2013 | CN202731846U Automatic pressure valve for oil well |
| 02/13/2013 | CN202731845U Buoyancy pressure difference control type shaft bottom blowout control switch |
| 02/13/2013 | CN202731844U Safe monitoring device of oil-gas well safe valve |
| 02/13/2013 | CN202731843U Constant flow gas lifting valve |
| 02/13/2013 | CN202731842U Injection valve capable of throwing and salvaging for injecting chemical agent |
| 02/13/2013 | CN202731841U Controllable differential pressure type sliding sleeve |
| 02/13/2013 | CN202731840U Antitheft sample valve for wellhead of oil well |
| 02/13/2013 | CN202731839U Pressure difference-type anti-freeze constant pressure air vent valve |
| 02/13/2013 | CN202731838U Pressure rod destabilization triggered wellhead safe valve |
| 02/13/2013 | CN202731837U Low-pressure triggered pressure rod destabilization wellhead shut-off valve |