| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
|---|
| 10/23/2002 | CN2517868Y Impacting oil drain appts. |
| 10/23/2002 | CN2517867Y Downhole fluid two-way flow valve |
| 10/23/2002 | CN2517866Y Reversible well-flushing appts. |
| 10/22/2002 | US6467546 Drop ball sub and system of use |
| 10/17/2002 | US20020148615 PDF valve |
| 10/17/2002 | US20020148614 PDF valve |
| 10/17/2002 | US20020148607 Zonal isolation tool with same trip pressure test |
| 10/16/2002 | CN2516692Y 压力控制阀 Pressure control valve |
| 10/16/2002 | CN2516691Y Valve for gas exiting of under-balance drilling gas-liquid separater |
| 10/16/2002 | CN2516690Y Oil-well pump bottom sand-proof device |
| 10/16/2002 | CN1375035A Downhole safety valve |
| 10/15/2002 | US6464011 Production well telemetry system and method |
| 10/09/2002 | CN2515421Y Theft-proof air valve in well head |
| 10/08/2002 | US6460621 Light-intervention subsea tree system |
| 10/03/2002 | WO2001021935A9 Valve for use in wells |
| 10/03/2002 | US20020140573 Pressure impulse telemetry apparatus and method |
| 10/03/2002 | US20020139422 Multiport gate valve assembly |
| 10/01/2002 | US6457749 Lock assembly |
| 09/26/2002 | WO2002075111A1 Circulation control device within a well bore |
| 09/26/2002 | WO2002075104A1 Downhole tool |
| 09/26/2002 | US20020134551 Method and apparatus for selective injection or flow control with through-tubing operation capacity |
| 09/25/2002 | EP0668959A4 Method and apparatus for gravel packing a well |
| 09/25/2002 | CN2512905Y Leak-proof well flushing device for oil pumping well |
| 09/25/2002 | CN2512904Y Input type oil feeding valve |
| 09/25/2002 | CN2512902Y High pressure packing one-step filling tool |
| 09/24/2002 | US6456902 Web-based system and method for enhancing fluid and gas recovery as well as remote on demand control of fluid flow in a well |
| 09/24/2002 | US6454015 Shearing gate valve |
| 09/24/2002 | US6453995 Tubing hanger saddle valve |
| 09/24/2002 | US6453944 Multiport gate valve assembly |
| 09/19/2002 | US20020129942 Tool string |
| 09/19/2002 | US20020129940 High temperature explosives for downhole well applications |
| 09/19/2002 | US20020129934 Tubular filling system |
| 09/18/2002 | EP1241322A1 Method of controlling a subsurface well tool |
| 09/18/2002 | CN2511788Y Counter cyclic cleaning valve for downhole packer |
| 09/17/2002 | US6450263 Remotely actuated rupture disk |
| 09/17/2002 | US6450255 Downhole flow control devices |
| 09/12/2002 | US20020126021 Permanent downhole, wireless, two-way telemetry backbone using redundant repeaters |
| 09/11/2002 | CN2510620Y Sectional well-washing valve |
| 09/10/2002 | US6446729 Sand control method and apparatus |
| 09/06/2002 | WO2002068793A1 Ball activated tool for use in downhole drilling |
| 09/06/2002 | WO2002010546A3 Method and apparatus for formation damage removal |
| 09/06/2002 | WO2001004456A9 Lubricator for underbalanced drilling |
| 09/05/2002 | US20020121373 System for pressure testing tubing |
| 09/05/2002 | US20020121366 Induction choke for power distribution in piping structure |
| 09/04/2002 | EP1236862A2 Fail safe surface controlled subsurface safety valve for use in a well |
| 09/04/2002 | EP1235973A1 Wellbore system having non-return valve |
| 09/04/2002 | CN2509318Y Hydraulic sealing compensating fluid increasing device |
| 08/29/2002 | WO2002066788A1 Fluid flow control apparatus |
| 08/29/2002 | WO2002033215A3 Dual valve well control in underbalanced wells |
| 08/29/2002 | US20020117309 Hydraulically activated selective circulating/reverse circulating packer assembly |
| 08/28/2002 | EP1234100A2 Production valve |
| 08/28/2002 | EP1234092A2 Ceramic components for high pressure oil wells |
| 08/28/2002 | CN2507993Y Borehole hydraulic change valve |
| 08/28/2002 | CN2507992Y Self-locking theftproof valve |
| 08/22/2002 | WO2002064942A2 Downhole packer |
| 08/22/2002 | US20020112862 Valve assembly |
| 08/22/2002 | US20020112860 Apparatus and method for electrically controlling multiple downhole devices |
| 08/21/2002 | EP1233145A2 Wellhead Assembly |
| 08/21/2002 | EP1233143A1 Coiled tubing |
| 08/21/2002 | CN2506767Y Theft-proof casing gate |
| 08/21/2002 | CN2506763Y Automatic adjustable counter-jetting resistance joint |
| 08/20/2002 | US6435282 Annular flow safety valve and methods |
| 08/15/2002 | WO2002063129A1 Safety valve for oil wells |
| 08/15/2002 | US20020108755 Sand screen with active flow control |
| 08/15/2002 | US20020108750 Full opening bulged forward acting rupture disc having variable depth score line |
| 08/15/2002 | US20020108747 Fail safe surface controlled subsurface safety valve for use in a well |
| 08/14/2002 | EP0854967B1 Method and devices for making safe an oil well in the event of a defect in the hydraulic control line of its bottom safety valve |
| 08/13/2002 | US6434435 Application of adaptive object-oriented optimization software to an automatic optimization oilfield hydrocarbon production management system |
| 08/13/2002 | US6433991 Controlling activation of devices |
| 08/08/2002 | WO2002061236A1 Downhole circulation valve operated by dropping balls |
| 08/08/2002 | WO2002029196A3 Improved well testing system |
| 08/08/2002 | US20020104659 Access control between a main bore and a lateral bore in a production system |
| 08/08/2002 | US20020104650 Method and apparatus for frac/gravel packs |
| 08/08/2002 | DE4302447C2 Absperrgerät für Flüssigkeiten und Gase in Rohren Shut-off device for liquids and gases in pipes |
| 08/07/2002 | EP1228290A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 08/06/2002 | US6427778 Control system for deep set subsurface valves |
| 08/06/2002 | US6427773 Flow through bypass tubing plug |
| 08/01/2002 | WO2002059485A1 Gas lift valve with central body ventury for controlling the flow of injection gas in oil wells producing by continuous gas lift |
| 08/01/2002 | WO2002059457A1 Downhole motorized flow control valve |
| 08/01/2002 | US20020100592 Production flow tree cap |
| 08/01/2002 | US20020100501 BOP operating system with quick dump valve |
| 07/31/2002 | EP1226336A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 07/31/2002 | EP1226332A1 Hydraulically set straddle packers |
| 07/31/2002 | CN2503198Y Uniflow eccentric valve injection well down-hole flow |
| 07/30/2002 | US6425413 Valve with secondary load bearing surface |
| 07/30/2002 | US6425298 Apparatus for passive removal of subsurface contaminants and volume flow measurement |
| 07/26/2002 | CA2369380A1 Apparatus and method for electrically controlling multiple downhole devices |
| 07/25/2002 | WO2001042620A9 Sand control method and apparatus |
| 07/25/2002 | US20020096333 Base-pipe flow control mechanism |
| 07/25/2002 | US20020096332 Gas lift valve with central body venturi for controlling the flow of injection gas in oil wells producing by continuous gas lift |
| 07/25/2002 | US20020096329 Unconsolidated zonal isolation and control |
| 07/24/2002 | EP1224379A1 Flow control apparatus for use in a subterranean well |
| 07/23/2002 | US6422317 Flow control apparatus and method for use of the same |
| 07/18/2002 | US20020092654 Expandable packer isolation system |
| 07/17/2002 | CN1358926A Self-adaptive pressure hot washing valve |
| 07/17/2002 | CN1087806C Apparatus and method for determinating integrity of oil well tubing |
| 07/16/2002 | US6419024 Deviated borehole drilling assembly |
| 07/16/2002 | US6419023 Deviated borehole drilling assembly |
| 07/16/2002 | US6419021 Deviated borehole drilling assembly |
| 07/16/2002 | US6419012 Deviated borehole drilling assembly |