| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
|---|
| 08/22/2007 | CN2937467Y Under-balance well casing valve capable of measuring bottom-hole pressure |
| 08/22/2007 | CA2744835A1 Adjustable venturi valve |
| 08/21/2007 | US7258508 Annular safety and flow control system for underground gas storage |
| 08/21/2007 | CA2462773C Pressure equalizing plunger valve for downhole use |
| 08/16/2007 | US20070187115 Downhole actuating apparatus and method |
| 08/16/2007 | US20070187107 Downhole flow control apparatus, operable via surface applied pressure |
| 08/16/2007 | US20070187106 Method and apparatus for reduction of control lines to operate a multi-zone completion |
| 08/15/2007 | EP1581719B1 Actuation devices, tools and apparatus |
| 08/14/2007 | US7255178 Drillable bridge plug |
| 08/14/2007 | US7255174 Cement control ring |
| 08/14/2007 | US7255173 Instrumentation for a downhole deployment valve |
| 08/09/2007 | US20070181313 Downhole tool |
| 08/09/2007 | US20070181305 Downhole milling machine and method of use |
| 08/08/2007 | EP1815104A1 Actuating mechanism |
| 08/08/2007 | CN2931772Y Under balance under well casing valve capable of measuring bottom-hole pressure |
| 08/08/2007 | CN2931771Y Oil well valve |
| 08/08/2007 | CN2931765Y Multifunctional combined oil producing wellhead device |
| 08/07/2007 | US7252153 Bi-directional fluid loss device and method |
| 08/07/2007 | US7252152 Methods and apparatus for actuating a downhole tool |
| 08/07/2007 | US7252149 Safety valve lock out system and method |
| 08/07/2007 | US7252147 Cementing methods and systems for initiating fluid flow with reduced pumping pressure |
| 08/07/2007 | CA2201945C A mechanical overload protection device |
| 08/02/2007 | WO2007086837A1 Positional control of downhole actuators |
| 08/02/2007 | US20070175639 Method and a device for monitoring an/or controlling a load on a tensioned elongated element |
| 08/02/2007 | CA2670291A1 Snorkel device for flow control |
| 08/01/2007 | EP1360392B1 Safety valve for oil wells |
| 08/01/2007 | CN2929167Y Safety valve of drill pole |
| 08/01/2007 | CN2929166Y Throttling well killing device |
| 08/01/2007 | CN2929159Y Hot production wellhead device |
| 08/01/2007 | CN2929158Y Wellhead device of concentric double tube injection water |
| 08/01/2007 | CN1329624C Gravel pack method |
| 08/01/2007 | CN101008312A Adjustable fixed choke valve |
| 07/31/2007 | US7249635 Communication tool for accessing a non annular hydraulic chamber of a subsurface safety valve |
| 07/31/2007 | US7249633 Release tool for coiled tubing |
| 07/26/2007 | WO2007084132A1 Well tool having magnetically coupled position sensor |
| 07/26/2007 | WO2007084006A1 Cementing valve |
| 07/26/2007 | WO2007083192A1 Wellbore system and method using a flow-actuated diverter valve |
| 07/26/2007 | WO2007060449A3 Downhole tool |
| 07/26/2007 | US20070169942 Flow Control Device |
| 07/26/2007 | CA2637410A1 Cementing valve |
| 07/25/2007 | EP1809936A1 Low power actuator and valve-actuator combination |
| 07/25/2007 | EP1809931A1 Ball valve |
| 07/25/2007 | EP1809860A1 Safety valve |
| 07/25/2007 | CN2926489Y Underwell safety valve |
| 07/25/2007 | CN2926488Y Set sealer of jet-collecting pump |
| 07/25/2007 | CN2926487Y Supporting oil releaser |
| 07/24/2007 | US7246668 Pressure actuated tubing safety valve |
| 07/24/2007 | CA2288784C Monitoring of downhole parameters and tools utilizing fiber optics |
| 07/19/2007 | US20070163774 Flow Control System for Use in a Well |
| 07/19/2007 | DE102007001399A1 Wellbore testing method involves inserting tool string into wellbore, actuating each valve in tool string, actuating successively valves in predetermined sequence to open state and testing successively zones in wellbore |
| 07/18/2007 | EP1415104B1 Valve system and method |
| 07/18/2007 | CN2924007Y Four-effect protector |
| 07/18/2007 | CN2924000Y Multi-path automatic metering distribution device |
| 07/18/2007 | CN2923993Y Steam-filling-well underground steam non-return device |
| 07/18/2007 | CN100999987A Electrohydraulic compound switch controlling valve for oil water well working with pressure |
| 07/18/2007 | CA2723064A1 Drilling and hole enlargement device |
| 07/17/2007 | US7243728 Sliding sleeve devices and methods using O-ring seals as shear members |
| 07/17/2007 | US7243727 Isolation assembly for coiled tubing |
| 07/17/2007 | US7243723 System and method for fracturing and gravel packing a borehole |
| 07/17/2007 | CA2259852C Wireless coiled tubing joint locator |
| 07/13/2007 | CA2570250A1 Flow control system for use in a well |
| 07/12/2007 | US20070158069 Method for drilling and casing a wellbore with a pump down cement float |
| 07/11/2007 | CN2921268Y Kelly bar plug valve |
| 07/10/2007 | US7240739 Well fluid control |
| 07/10/2007 | US7240737 Direct proportional surface control system for downhole choke |
| 07/10/2007 | US7240734 System and method for fail-safe disconnect from a subsea well |
| 07/10/2007 | CA2442963C Flow control apparatus for use in a wellbore |
| 07/10/2007 | CA2408906C Valve assembly |
| 07/05/2007 | WO2007075860A2 Gas wellhead extraction system and method |
| 07/05/2007 | US20070151737 Flushing device |
| 07/05/2007 | US20070151736 Well tool protection system and method |
| 07/05/2007 | US20070151734 Method and apparatus for wellbore fluid treatment |
| 07/04/2007 | CN2918723Y Water-resistant well washing switch |
| 07/04/2007 | CN1324218C Bulged single-hinged scored rupture disc having a non-circular varying depth score line |
| 07/03/2007 | US7237611 Zero drill completion and production system |
| 07/03/2007 | US7237472 Linear hydraulic stepping actuator with fast close capabilities |
| 06/28/2007 | WO2007027617A3 Inflow control device with passive shut-off feature |
| 06/28/2007 | WO2007024627A3 Sand control screen assembly enhanced with disappearing sleeve and burst disc |
| 06/28/2007 | US20070144744 Valve apparatus with seal assembly |
| 06/27/2007 | EP1799958A2 Downhole safety valve apparatus and method |
| 06/27/2007 | CN2916120Y Oil-drainage device of oil well |
| 06/27/2007 | CN2916119Y Automatic safety switch for oil gas well |
| 06/27/2007 | CN2916118Y High-pressure valve |
| 06/26/2007 | US7234529 Flow switchable check valve and method |
| 06/26/2007 | US7234527 System and method for fail-safe disconnect from a subsea well |
| 06/26/2007 | US7234518 Adjustable well screen assembly |
| 06/26/2007 | CA2402623C Template and system of templates for drilling and completing offsite well bores |
| 06/26/2007 | CA2399071C Controlling activation of devices |
| 06/26/2007 | CA2339944C Hydraulic well control system |
| 06/26/2007 | CA2323154C Actuator apparatus and method for downhole completion tools |
| 06/26/2007 | CA2290668C Differential valve for a sub-sea flexible pipe |
| 06/26/2007 | CA2271795C Whipstock |
| 06/26/2007 | CA2247834C Computer controlled downhole safety valve system |
| 06/21/2007 | US20070137869 Subsurface Safety Valve |
| 06/20/2007 | EP1798367A2 Wellhead comprising a tubing hanger with ball valve in the annulus bore |
| 06/20/2007 | EP1797300A2 Multilobe rotary motion asymetric compression/expansion engine |
| 06/20/2007 | EP1797279A2 Downhole safety valve apparatus and method |
| 06/20/2007 | EP1797278A2 Expansion pig |
| 06/20/2007 | CN2913593Y Sand-flush proof uniflow valve |
| 06/20/2007 | CN2913588Y Multifunctional oil-collecting control device for oil extraction pore |