| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 03/26/2013 | US8403054 Torque tripping mechanism for a valve |
| 03/26/2013 | US8403053 Circuit functional test system and method |
| 03/26/2013 | US8403052 Flow control screen assembly having remotely disabled reverse flow control capability |
| 03/26/2013 | US8403042 Method and apparatus for use with downhole tools having gas-filled cavities |
| 03/21/2013 | WO2013040298A2 Self-controlled inflow control device |
| 03/21/2013 | WO2013039670A1 Completing a multi-stage well |
| 03/21/2013 | WO2013039663A2 Magnetically coupled safety valve with satellite inner magnets |
| 03/21/2013 | WO2013039480A1 Automated diversion valve control for pump down operations |
| 03/21/2013 | WO2013039406A1 Collar |
| 03/21/2013 | WO2013037055A1 Wellbore frac tool with inflow control |
| 03/21/2013 | WO2013037049A1 Rotating flow control device for wellbore fluid control device |
| 03/21/2013 | WO2012162528A3 Pump system |
| 03/21/2013 | WO2012148640A3 Controlled production and injection |
| 03/21/2013 | US20130068476 Well barrier |
| 03/21/2013 | US20130068475 Multistage Production System Incorporating Valve Assembly With Collapsible or Expandable C-Ring |
| 03/21/2013 | US20130068474 Downhole System and Apparatus Incorporating Valve Assembly with Resilient Deformable Engaging Element |
| 03/21/2013 | US20130068473 Pressure controlled well construction and operation systems and methods usable for hydrocarbon operations, storage and solution mining |
| 03/21/2013 | US20130068472 Hydraulic Three Position Stroker Tool |
| 03/21/2013 | US20130068471 Transition tool and method |
| 03/21/2013 | US20130068467 Self-controlled inflow control device |
| 03/21/2013 | US20130068451 Tools and Methods for Use in Completion of a Wellbore |
| 03/21/2013 | CA2856071A1 Rotating flow control device for wellbore fluid control device |
| 03/21/2013 | CA2848349A1 Automated diversion valve control for pump down operations |
| 03/21/2013 | CA2847972A1 Wellbore frac tool with inflow control |
| 03/21/2013 | CA2846203A1 Completing a multi-stage well |
| 03/20/2013 | CN202810809U Automatic control system of production of nature gas well |
| 03/20/2013 | CN202810789U Underground device for sliding sleeve switch |
| 03/20/2013 | CN202810788U Pitching sliding sleeve |
| 03/20/2013 | CN202810787U 多功能热洗阀 Multifunction hot wash valve |
| 03/20/2013 | CN202810786U Anchoring switch |
| 03/20/2013 | CN202810785U Novel well cementing back-pressure valve |
| 03/20/2013 | CN202810784U Underground intelligent switch device |
| 03/20/2013 | CN202810783U Constant-pressure exhaust recovery device for oil well casing |
| 03/20/2013 | CN202810782U Safe pressure relief device for oil well using electric heating rods |
| 03/20/2013 | CN202810781U Oil well casing pipe oil and gas releasing device |
| 03/20/2013 | CN202810758U Standard wellhead flow path device for rod-pumped well |
| 03/20/2013 | CN202810756U Standard wellhead flow path device for ground drive screw pump well |
| 03/20/2013 | CN202810755U Flowing well standard wellhead flow device |
| 03/20/2013 | CN202810754U Standard wellhead flow path device for electric submersible centrifugal pump well |
| 03/20/2013 | CN102979494A Throwing open type multi-cluster sliding sleeve |
| 03/20/2013 | CN102979481A Anti-blocking constant pressure switch of water injection string |
| 03/20/2013 | CN102979480A Ball valve assembly |
| 03/20/2013 | CN102080512B Multiposition one-way bypass connection structure for deep-water abandoned well cutting device |
| 03/20/2013 | CN102080511B Deepwater abandoned well cutting device having cementing plug and operation method of cementing plug thereof |
| 03/19/2013 | US8397824 Hydraulic control system for actuating downhole tools |
| 03/19/2013 | US8397823 Tubular actuator, system and method |
| 03/19/2013 | US8397820 Method and apparatus for wellbore fluid treatment |
| 03/14/2013 | WO2013036796A1 System and method for damping vibration in a drill string using a magnetorheological damper |
| 03/14/2013 | WO2013036433A1 Drilling apparatus including a fluid bypass device and methods of using same |
| 03/14/2013 | WO2013034185A1 Autonomous valve with temperature responsive device |
| 03/14/2013 | WO2013034184A1 A method and an arrangement for controlling fluid flow into a production pipe |
| 03/14/2013 | WO2012173928A3 Managing treatment of subterranean zones |
| 03/14/2013 | WO2012141881A3 Pressure equalization apparatus and associated systems and methods |
| 03/14/2013 | WO2012141842A3 Ball seat having ball support member |
| 03/14/2013 | WO2012002817A4 Valve assembly |
| 03/14/2013 | US20130062072 System and Method for Stimulating a Multi-Zone Well |
| 03/14/2013 | US20130062071 Minimal travel flow control device |
| 03/14/2013 | US20130062066 Multi-Zone Screened Fracturing System |
| 03/14/2013 | CA2848243A1 Autonomous valve with temperature responsive device |
| 03/14/2013 | CA2847609A1 A method and an arrangement for controlling fluid flow into a production pipe |
| 03/14/2013 | CA2847240A1 System and method for damping vibration in a drill string using a magnetorheological damper |
| 03/13/2013 | EP2568109A1 Ball valve assembly |
| 03/13/2013 | EP2568108A1 A control system for a subsea well |
| 03/13/2013 | EP2567061A2 Method and apparatus for use with an inflow control device |
| 03/13/2013 | CN202788793U Electric pump well lubricating nipple filter device |
| 03/13/2013 | CN202788770U Built-in type casing gas recovery device of pumping unit |
| 03/13/2013 | CN202788755U Twin-stage ball seat type sliding sleeve |
| 03/13/2013 | CN202788754U Downhole tool hydraulic controlling switch |
| 03/13/2013 | CN202788753U Differential-pressure sliding sleeve for staged fracturing of sidetrack horizontal wells |
| 03/13/2013 | CN202788752U Efficient emulsification one-way watering valve of heavy oil well pump |
| 03/13/2013 | CN202788751U Optical fiber transmission pressure-measurable downhole casing valve |
| 03/13/2013 | CN202788750U One-way valve for inclined shaft or approximately horizontal well |
| 03/13/2013 | CN202788749U Spare air vent valve for ESP (Electric Submersible Pump)cable packer of oil and gas well |
| 03/13/2013 | CN202788748U High pressure oil-water well sleeve pressure relief device |
| 03/13/2013 | CN202788747U Pressure relief device of pump oil well casing of electric submersible |
| 03/13/2013 | CN202788720U Pipe-in-pipe steam injection wellhead device |
| 03/13/2013 | CN102971482A Casing fill-up fluid management tool |
| 03/13/2013 | CN102966332A Sliding sleeve switch tool |
| 03/13/2013 | CN102966331A Valve for hydraulic fracturing through cement outside casing |
| 03/13/2013 | CN102966330A Valve for hydraulic fracturing through cement outside casing |
| 03/13/2013 | CN101273182B 油井安全装置和相关的安全设施 Well safety devices and related security facilities |
| 03/12/2013 | US8393396 Subterranean valve operated by string relative movement |
| 03/12/2013 | CA2788985A1 Tools and methods for use in completion of a wellbore |
| 03/07/2013 | WO2013033661A1 Valve for hydraulic fracturing through cement outside casing |
| 03/07/2013 | WO2013033659A1 Valve for hydraulic fracturing through cement outside casing |
| 03/07/2013 | WO2013033547A1 Sample capture prioritization |
| 03/07/2013 | WO2013033160A1 Plug and pressure testing method and apparatus |
| 03/07/2013 | WO2013032687A2 Injection of fluid into selected ones of multiple zones with well tools selectively responsive to magnetic patterns |
| 03/07/2013 | WO2013030284A1 Annular barrier with compensation device |
| 03/07/2013 | WO2013009616A3 A double valve block and actuator assembly including same |
| 03/07/2013 | WO2012173852A3 Tubular valving system, body and method of opening |
| 03/07/2013 | US20130056221 Flow control device and flow control method |
| 03/07/2013 | US20130056220 Valve for hydraulic fracturing through cement outside casing |
| 03/07/2013 | US20130056217 Flow path control based on fluid characteristics to thereby variably resist flow in a subterranean well |
| 03/07/2013 | US20130056206 Valve for hydraulic fracturing through cement outside casing |
| 03/07/2013 | CA2845495A1 Annular barrier with compensation device |
| 03/07/2013 | CA2844960A1 Injection of fluid into selected ones of multiple zones with well tools selectively responsive to magnetic patterns |
| 03/06/2013 | CN202767959U Device for modularly adjusting flow rate |
| 03/06/2013 | CN202767946U Oil tube bleeder |
| 03/06/2013 | CN202767945U Constant pressure check valve for water injection well |