| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 02/13/2013 | CN202731836U Novel pressure rod destabilization triggered wellhead shut-off valve |
| 02/13/2013 | CN202731835U Clamp-type wellhead pressure testing valve |
| 02/13/2013 | CN202731834U Double-valve-seat flat valve |
| 02/13/2013 | CN202731833U Novel float collar float shoe |
| 02/13/2013 | CN202731828U Oil layer anti-leakage device |
| 02/13/2013 | CN202731766U Oil extraction wellhead electric heater safe valve conversion connector |
| 02/13/2013 | CN102926705A Electromagnetic underground water exploring/plugging switcher |
| 02/13/2013 | CN102926704A Pressure-balancing one-way valve for coiled-tubing layering fracturing |
| 02/13/2013 | CN102926703A Releasing and decompression switch for packer |
| 02/13/2013 | CN102926702A Valve core of casing valve |
| 02/13/2013 | CN102926695A Oil pipe oil-drainage anchor |
| 02/13/2013 | CN102052057B Pore water pressure orientator |
| 02/13/2013 | CN101956541B Underground switching well used for measuring, directly reading and storing coalbed methane |
| 02/13/2013 | CN101646839B Tubing pressure insensitive control system |
| 02/13/2013 | CN101629480B Inner blowout preventer of full-port drilling tool |
| 02/12/2013 | US8371386 Rotatable valve for downhole completions and method of using same |
| 02/12/2013 | US8371385 Christmas tree and wellhead design |
| 02/12/2013 | US8371375 Wireline run mechanically or hydraulically operated subterranean insert barrier valve and associated landing nipple |
| 02/12/2013 | CA2645607C Chemical injection check valve incorporated into a tubing retrievable safety valve |
| 02/07/2013 | WO2013019721A2 Recovery valve |
| 02/07/2013 | WO2013016822A1 Wellbore tool with indexing mechanism and method |
| 02/07/2013 | US20130032361 Recovery Valve |
| 02/07/2013 | US20130032356 Electrically actuated insert safety valve |
| 02/07/2013 | US20130032355 Safety valve with provisions for powering an insert safety valve |
| 02/07/2013 | US20130032354 Annular pressure regulating diaphragm and methods of using same |
| 02/07/2013 | US20130032329 Downhole filter tool |
| 02/07/2013 | CA2844342A1 Wellbore tool with indexing mechanism and method |
| 02/07/2013 | CA2843505A1 A downhole device for data acquisition during hydraulic fracturing operation and method thereof |
| 02/06/2013 | EP2554786A1 Electrically actuated insert safety valve |
| 02/06/2013 | EP2554785A2 Safety valve with provisions for powering an insert safety valve |
| 02/06/2013 | EP2553215A1 Subterranean well valve activated with differential pressure |
| 02/06/2013 | EP2553214A2 An actuator device |
| 02/06/2013 | EP2553212A1 Device for a plug construction for conducting well tests |
| 02/06/2013 | EP2553211A2 Downhole actuating apparatus |
| 02/06/2013 | EP2553210A2 Mechanical counter |
| 02/06/2013 | CN202718661U Folding manipulator used for closing valve quickly in distance |
| 02/06/2013 | CN202718660U Separate exploitation and joint exploitation tubular column in screen-pipe completed horizontal well |
| 02/06/2013 | CN202718659U Full-bore type blowout prevention valve |
| 02/06/2013 | CN102913234A Tubular column pressure testing device |
| 02/06/2013 | CN102913191A Tempering-preventive valve for gas drilling |
| 02/06/2013 | CN102913190A Rotary oil drain device |
| 02/06/2013 | CN102913189A Plug |
| 02/06/2013 | CN102913188A Underground oil and gas nozzle |
| 02/06/2013 | CN102913187A Kelly cock valve |
| 02/06/2013 | CN102913186A Gas injection valve |
| 02/06/2013 | CN101982642B Remote control type drilling bypass circulation valve |
| 02/05/2013 | US8365821 System for a downhole string with a downhole valve |
| 02/05/2013 | US8365820 System for a downhole string with a downhole valve |
| 01/31/2013 | WO2013015992A2 Selective hydraulic fracturing tool and method thereof |
| 01/31/2013 | WO2012170122A3 Modular control system for downhole tool |
| 01/31/2013 | WO2012112657A3 Integrated zonal contact and intelligent completion system |
| 01/31/2013 | US20130025878 Surface controlled reversible coiled tubing valve assembly |
| 01/31/2013 | US20130025877 Sliding Sleeve Valve with Feature to Block Flow Through the Tool |
| 01/31/2013 | US20130025876 Selective hydraulic fracturing tool and method thereof |
| 01/31/2013 | US20130025872 Pressure Actuated Ported Sub for Subterranean Cement Completions |
| 01/31/2013 | US20130025850 Method of drilling and running casing in large diameter wellbore |
| 01/31/2013 | US20130025846 Downhole gas release apparatus |
| 01/31/2013 | CA2842541A1 Ball valve |
| 01/31/2013 | CA2842538A1 Valve |
| 01/31/2013 | CA2841078A1 Selective hydraulic fracturing tool and method thereof |
| 01/30/2013 | EP2550425A1 Apparatus and method for well operations |
| 01/30/2013 | EP2550424A1 Apparatus and method for well operations |
| 01/30/2013 | EP2550423A2 High pressure and high temperature ball seat |
| 01/30/2013 | CN202707017U Anti-backflow eccentric water distributor |
| 01/30/2013 | CN202706993U Subsurface safety valve |
| 01/30/2013 | CN202706992U Watering flow wellhead combination valve of oil well valve |
| 01/30/2013 | CN202706991U Anti-theft blowout paraffin removal device |
| 01/30/2013 | CN202706990U Built-in uniflow valve of wellhead oil nozzle sleeve |
| 01/30/2013 | CN202706989U Pressure regulating air vent valve |
| 01/30/2013 | CN202706988U Fully-opened plug valve |
| 01/30/2013 | CN202706987U Pneumatic automatically-cleaning device of small mouse hole |
| 01/30/2013 | CN202706986U Bilateral oil channel cock valve |
| 01/30/2013 | CN202706962U Blowout wrecking device for mechanically installing plug valve |
| 01/30/2013 | CN101490360B Method for flow control and autonomous valve or flow control device |
| 01/29/2013 | US8360158 Overriding a primary control subsystem of a downhole tool |
| 01/29/2013 | US8360154 Flow diverter ring for mud saver valves |
| 01/29/2013 | CA2673009C Linear motor to pre-bias shuttle force |
| 01/24/2013 | WO2013011274A1 A solenoid-operated valve |
| 01/24/2013 | WO2013010244A1 Apparatus and methods for producing natural gas using a gas recycle phase to remove liquid from a well |
| 01/24/2013 | WO2012166318A3 Ball valve |
| 01/24/2013 | WO2012162157A3 Formation treatment system and method |
| 01/24/2013 | WO2012148993A3 Subsea dispersant injection systems and methods |
| 01/24/2013 | WO2012094117A3 Subsea safety system having a protective frangible liner and method of operating same |
| 01/24/2013 | US20130020097 Downhole fluid-flow communication technique |
| 01/24/2013 | US20130020090 Three dimensional fluidic jet control |
| 01/24/2013 | US20130020089 Tubular valving system and method |
| 01/24/2013 | US20130020088 Chemically targeted control of downhole flow control devices |
| 01/24/2013 | US20130020068 Rotating flow control devices having stabilized bearings |
| 01/23/2013 | EP2547860A2 Well assembly with a composite fiber sleeve for an opening |
| 01/23/2013 | EP2547857A1 Casing fill-up fluid management tool |
| 01/23/2013 | CN202690021U Anti-channeling layered flow control flow string |
| 01/23/2013 | CN202690020U High-pressure difference composite valve core throttle valve |
| 01/23/2013 | CN202690008U Duplex with switch |
| 01/23/2013 | CN202690007U Hand wheel and strobe |
| 01/23/2013 | CN202689997U Anti-theft device of sampling valve of oil well |
| 01/23/2013 | CN101832119B Low-consumption flat valve |
| 01/22/2013 | US8356671 Tool with multi-size ball seat having segmented arcuate ball support member |
| 01/22/2013 | US8356670 Ball seat assembly and method of controlling fluid flow through a hollow body |
| 01/22/2013 | US8356669 Downhole adjustable inflow control device for use in a subterranean well |
| 01/22/2013 | US8356668 Variable flow restrictor for use in a subterranean well |