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