Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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10/31/2001 | CN2457336Y Rail rotary oil draining device |
10/31/2001 | CN2457335Y Splitter valve for oil well |
10/30/2001 | US6310559 Monitoring performance of downhole equipment |
10/30/2001 | US6308783 Wellbore flow control device |
10/25/2001 | WO2001079655A1 Differential flow control valve |
10/25/2001 | US20010033164 Focused through-casing resistivity measurement |
10/24/2001 | EP1147283A1 Multilateral well and electrical transmission system |
10/24/2001 | CN2455929Y Underwell water injection cyclic valve |
10/24/2001 | CN2455928Y Blowout preventing safety device under gasser |
10/24/2001 | CN2455927Y Gate lock on top opening of oil sucking pipe |
10/23/2001 | US6305467 Wireless coiled tubing joint locator |
10/23/2001 | US6305402 Variable orifice gas lift valve for high flow rates with detachable power source and method of using |
10/23/2001 | CA2212978C Early evaluation formation testing system |
10/23/2001 | CA2102956C Acoustic system and method for performing operations in a well |
10/18/2001 | WO2001077485A1 Downhole flow meter |
10/18/2001 | WO2001077480A2 Apparatus to actuate downhole tool |
10/18/2001 | WO2001031167A8 Flow control apparatus for use in a subterranean well |
10/18/2001 | US20010030049 Well isolation system |
10/17/2001 | EP1144803A2 Downhole flapper valve assembly |
10/17/2001 | CN2454535Y Gas-proof valve of beam-pumping well |
10/17/2001 | CN2454534Y Oil-production portal device |
10/17/2001 | CN2454533Y Four-way valve of portal flow-divider |
10/16/2001 | US6302405 Anti-extrusion seal |
10/16/2001 | US6302216 Flow control and isolation in a wellbore |
10/16/2001 | US6302210 Safety valve utilizing an isolation valve and method of using the same |
10/16/2001 | US6302208 Gravel pack isolation system |
10/16/2001 | US6302200 Measurement port coupler for use in a borehole monitoring system |
10/16/2001 | US6302199 Mechanism for dropping a plurality of balls into tubulars used in drilling, completion and workover of oil, gas and geothermal wells |
10/16/2001 | US6302128 Bi-directional rotary output actuator |
10/11/2001 | US20010027866 Deviated borehole drilling assembly |
10/10/2001 | EP1141514A2 Pipe assembly with a plurality of outlets for use in a wellbore and method for running such a pipe assembly |
10/09/2001 | US6298916 Method and apparatus for controlling fluid flow in conduits |
10/09/2001 | US6298767 Undersea control and actuation system |
10/04/2001 | WO2001073423A1 Apparatus and method for downhole well equipment and process management, identification, and actuation |
10/04/2001 | WO2001073325A2 Gate valve |
10/04/2001 | WO2001073260A2 Multiport gate valve assembly |
10/04/2001 | WO2001073259A1 Tubing hanger with annulus bore |
10/04/2001 | WO2001073258A1 Gate valve with flow-through gate |
10/04/2001 | WO2001073257A1 Tubing head seal assembly |
10/04/2001 | WO2001073256A1 Tubing hanger system with gate valve |
10/04/2001 | WO2001073255A1 Internal gate valve for flow completion systems |
10/04/2001 | WO2001073254A2 Coupling means for controls bridge through a tubing head |
10/04/2001 | US20010025658 Multiport gate valve assembly |
10/04/2001 | US20010025651 Gas flow control device |
10/04/2001 | EP1138873A1 System and method for communicating hydraulic control to a wireline retrievable downhole device |
10/03/2001 | CN2451731Y Slip-type rotary drip |
10/03/2001 | CN2451730Y Hydraulic seam change switch |
10/03/2001 | CN2451729Y Sandproof pumping aid for oil-well pump |
10/03/2001 | CN2451728Y Cam valve for oil field under well snubbing serving |
10/03/2001 | CN2451727Y Drilling mud splash proof valve |
10/02/2001 | US6296061 Pilot-operated pressure-equalizing mechanism for subsurface valve |
10/02/2001 | US6296059 Reverse circulating control valve |
09/27/2001 | US20010023765 Lubricator for underbalanced drilling |
09/27/2001 | US20010023764 Lubricator for underbalanced drilling |
09/27/2001 | US20010023614 Monitoring of downhole parameters and tools utilizing fiber optics |
09/26/2001 | EP1136649A1 Tubing hanger sleeve valve |
09/25/2001 | US6293517 Ball valve having convex seat |
09/25/2001 | US6293346 Method and apparatus for relieving pressure |
09/25/2001 | US6293344 Retainer valve |
09/25/2001 | US6293342 Bypass valve closing means |
09/24/2001 | CA2342054A1 Fire activated, fail safe, gate valve bonnet |
09/20/2001 | WO2001069037A1 Multi-purpose float equipment and method |
09/20/2001 | WO2001069036A1 Downhole surge pressure reduction and filtering apparatus |
09/20/2001 | WO2001018357B1 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
09/20/2001 | US20010022225 Downhole dump valve |
09/20/2001 | US20010022194 Valve with secondary load bearing surface |
09/20/2001 | CA2760857A1 Multi-purpose float equipment and method |
09/19/2001 | CN2448919Y Ground rotary type oil drainage apparatus |
09/19/2001 | CN2448918Y Chrisistmas tree for rotary oil sucking hole |
09/19/2001 | CN2448917Y Double-pipe gas-injection oil-production hole top apparatus for thick oil hole |
09/19/2001 | CN1313927A Grouting pipe equipment and method of grouting using the same for an underground water well |
09/18/2001 | US6289999 Fluid flow control devices and methods for selective actuation of valves and hydraulic drilling tools |
09/18/2001 | US6289992 Variable pressure pump through nozzle |
09/18/2001 | US6289990 Production tubing shunt valve |
09/18/2001 | US6289926 Flapper valve assembly with seat having load bearing shoulder |
09/18/2001 | CA2227856C Downhole pressure relief valve for well pump |
09/13/2001 | WO2001067466A1 In-well monitoring and flow control system |
09/12/2001 | EP1132572A2 Data line deployment in hydrocarbon wells |
09/12/2001 | EP1132571A1 Method and apparatus for frac/gravel packs |
09/12/2001 | EP1132565A2 Method and apparatus for downhole ball drop |
09/12/2001 | EP1131533A1 Tubular filling system |
09/12/2001 | CN2447519Y Oil riser bleeder |
09/11/2001 | US6286725 Contamination-safe multi-dose dispensing and delivery system for flowable materials |
09/11/2001 | US6286594 Downhole valve |
09/09/2001 | CA2339707A1 Downhole ball drop tool |
09/07/2001 | WO2001065718A2 Wireless power and communications cross-bar switch |
09/07/2001 | WO2001065069A1 Oilwell casing electrical power pick-off points |
09/07/2001 | WO2001065068A1 Wireless reservoir production control |
09/07/2001 | WO2001065066A1 Wireless communication using well casing |
09/07/2001 | WO2001065063A1 Wireless downhole well interval inflow and injection control |
09/07/2001 | WO2001065062A2 Use of downhole high pressure gas in a gas-lift well |
09/07/2001 | WO2001065061A1 Electro-hydraulically pressurized downhole valve actuator |
09/07/2001 | WO2001065060A1 Improving reservoir communication with a wellbore |
09/07/2001 | WO2001065056A1 Wireless downhole measurement and control for optimizing gas lift well and field performance |
09/07/2001 | WO2001065055A1 Controlled downhole chemical injection |
09/07/2001 | WO2001065054A1 Power generation using batteries with reconfigurable discharge |
09/07/2001 | WO2001065053A1 Tracer injection in a production well |
09/07/2001 | WO2001065049A2 Cavitating jet |
09/07/2001 | CA2401705A1 Wireless downhole measurement and control for optimizing gas lift well and field performance |
09/07/2001 | CA2339531A1 Method and apparatus for frac/gravel packs |