| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 10/06/2005 | US20050217864 Circulating sub |
| 10/06/2005 | US20050217845 Tubing hanger running tool and subsea test tree control system |
| 10/06/2005 | CA2554849A1 Inflatable sealing assembly and method for sealing off an inside of a flow carrier |
| 10/05/2005 | EP1549825A4 Dockable direct mechanical actuator for downhole tools and method |
| 10/05/2005 | EP1272733B1 Differential flow control valve |
| 10/05/2005 | CN2731099Y Theft-proof cutting off sampler for oil well |
| 10/05/2005 | CN2731098Y Inner embedded theft-proof sampler |
| 10/05/2005 | CN2731088Y High-pressure water injection device |
| 10/05/2005 | CN2731083Y Blocking-resisting device for oil reservoir |
| 10/05/2005 | CN1678813A Fast valve actuator and tool provided with same |
| 10/04/2005 | US6951331 Sleeve valve for controlling fluid flow between a hydrocarbon reservoir and tubing in a well and method for the assembly of a sleeve valve |
| 10/04/2005 | CA2450408C Downhole flow control devices |
| 10/04/2005 | CA2406488C Combination poppet and gate valve |
| 10/04/2005 | CA2183458C Gas lift system with retrievable gas lift valve |
| 09/30/2005 | CA2502598A1 Openhole perforating |
| 09/28/2005 | EP1261974B1 In-well monitoring and flow control system |
| 09/27/2005 | US6948561 Indexing apparatus |
| 09/22/2005 | WO2005088069A1 Duplex cone expander for expanding a tubular upward and downward from preexpanded section |
| 09/22/2005 | WO2005088067A1 Downward and upward expansion with expandable cone |
| 09/22/2005 | US20050205269 Deep set packer with hydrostatic setting actuator |
| 09/22/2005 | US20050205262 Subsea production systems |
| 09/22/2005 | US20050204803 Method for testing an electric motor |
| 09/22/2005 | CA2559008A1 Duplex cone expander for expanding a tubular upward and downward from preexpanded section |
| 09/21/2005 | EP1456501A4 Method and apparatus for replacing bop with gate valve |
| 09/20/2005 | US6945331 Multiple interventionless actuated downhole valve and method |
| 09/20/2005 | US6945330 Slickline power control interface |
| 09/15/2005 | WO2005085588A1 Annular pressure relief collar |
| 09/15/2005 | US20050199399 Lock for a downhole tool with a reset feature |
| 09/14/2005 | EP1415104A4 Valve system and method |
| 09/14/2005 | CN2725530Y Antifreezing sampler |
| 09/14/2005 | CN2725516Y Deviating hole single flow valve |
| 09/14/2005 | CN2725512Y Overflow valve |
| 09/14/2005 | CN1667238A Inclined high-temperature and high-pressure stop valve |
| 09/13/2005 | US6942192 Gate valve with flow-through gate |
| 09/13/2005 | CA2406249C Differential flow control valve |
| 09/13/2005 | CA2249432C Method and apparatus using coiled-in-coiled tubing |
| 09/09/2005 | WO2005083231A1 Improvements in or relating to valves |
| 09/09/2005 | WO2005083228A1 Connection system for subsea flow interface equipment |
| 09/08/2005 | US20050194152 Expander for expanding a tubular element |
| 09/08/2005 | US20050194129 Expander for expanding a tubular element |
| 09/07/2005 | EP1570153A1 Downhole safety valve for central circulation completion system |
| 09/07/2005 | CN2723671Y Down hole operation blowout retaining ball for water injection well |
| 09/06/2005 | CA2307170C Quick flow release valve |
| 09/01/2005 | WO2005080750A1 Method and actuator device |
| 09/01/2005 | WO2005079403A2 System for controlling a hydraulic actuator, and methods of using same |
| 09/01/2005 | US20050189119 Inflatable sealing assembly and method for sealing off an inside of a flow carrier |
| 09/01/2005 | US20050189117 Method & Apparatus for Selective Injection or Flow Control with Through-Tubing Operation Capacity |
| 09/01/2005 | US20050189107 Annular pressure relief collar |
| 09/01/2005 | US20050189106 Flow control apparatus for use in a wellbore |
| 08/31/2005 | CN2721866Y Under-mine casing-pipe valve |
| 08/30/2005 | US6937923 Controller system for downhole applications |
| 08/25/2005 | WO2005076803A2 Apparatus for changing wellbore fluid temperature |
| 08/25/2005 | US20050183499 Method and device for measuring a path that has been covered |
| 08/24/2005 | EP1278934B1 Tubing hanger system with gate valve |
| 08/24/2005 | EP0988484B1 Water well recharge throttle valve |
| 08/24/2005 | CN2720109Y Well-drilling multi-stage flow-throttling device for high-pressure oil-gas well |
| 08/24/2005 | CN2720108Y Slide-blocking type non-return valve |
| 08/24/2005 | CN1657738A Changing and overhaul double-runner flow nipple cover without production stop |
| 08/18/2005 | US20050178586 Downhole blowout preventor |
| 08/18/2005 | US20050178562 Method and apparatus for isolating and testing zones during reverse circulation drilling |
| 08/18/2005 | US20050178560 System for controlling a hydraulic actuator, and methods of using same |
| 08/18/2005 | US20050178559 Seal assembly for a safety valve |
| 08/18/2005 | US20050178552 Method and apparatus for wellbore fluid treatment |
| 08/17/2005 | CN2718217Y By-pass safety valve for petroleum drilling tool |
| 08/11/2005 | US20050173125 Apparatus for changing flowbore fluid temperature |
| 08/11/2005 | US20050173122 Well operations system |
| 08/11/2005 | CA2496649A1 Method and apparatus for isolating and testing zones during reverse circulation drilling |
| 08/10/2005 | CN2716499Y Automatic adjustment constant water nozzle |
| 08/09/2005 | US6926089 Downhole actuation system utilizing electroactive fluids |
| 08/09/2005 | CA2160817C Subsurface safety valve |
| 08/04/2005 | WO2005071221A1 Completion suspension valve system |
| 08/04/2005 | US20050167118 Tubing annulus valve |
| 08/04/2005 | US20050167108 Openhole Perforating |
| 08/03/2005 | CN2714797Y Check valve for controlling well track |
| 08/03/2005 | CN2714796Y Backflow proof ballseat |
| 08/03/2005 | CN1648465A System and method for offshore production with well control |
| 08/02/2005 | US6923423 Small bore gate valve |
| 08/02/2005 | US6923256 Disconnect device |
| 08/02/2005 | US6923255 Activating ball assembly for use with a by-pass tool in a drill string |
| 07/28/2005 | WO2005068774A1 Control system of an actuator for the actuation of submarine devices |
| 07/28/2005 | US20050161212 System and Method for Utilizing Nano-Scale Filler in Downhole Applications |
| 07/26/2005 | US6920930 Drop ball catcher apparatus |
| 07/21/2005 | WO2005045184A9 Control system communication and lock open tool and method for locking open a safety valve and communicating with surface |
| 07/21/2005 | US20050155774 Well operations system |
| 07/21/2005 | US20050155767 System and method for offshore production with well control |
| 07/21/2005 | US20050155765 Friction reducers for fluids comprising carbon dioxide and methods of using friction reducers in fluids comprising carbon dioxide |
| 07/20/2005 | EP1252416B1 Choke inductor for wireless communication and control in a well |
| 07/20/2005 | CN2711388Y Freeze-proofing sampling valve for water-injection well |
| 07/19/2005 | US6918452 Drill string shutoff valve |
| 07/14/2005 | WO2005064112A1 Hydraulically releaseable inflation tool for permanent bridge plug |
| 07/14/2005 | US20050151099 Pressure compensated shear seal solenoid valve |
| 07/14/2005 | US20050150658 Method and apparatus for enhancing oil and gas flow in a well |
| 07/13/2005 | CN1639441A Method and apparatus for replacing BOP with gate valve |
| 07/12/2005 | US6915845 Re-enterable gravel pack system with inflate packer |
| 07/12/2005 | CA2367528C Apparatus for remote control of wellbore fluid flow |
| 07/07/2005 | WO2005061844A1 Lock mechanism for a sliding sleeve |
| 07/07/2005 | US20050145417 Expandable reamer apparatus for enlarging subterranean boreholes and methods of use |
| 07/06/2005 | EP1550789A1 Seal stack for sliding sleeve |
| 07/06/2005 | EP1549825A2 Dockable direct mechanical actuator for downhole tools and method |
| 07/06/2005 | EP1549822A2 Remote intervention logic valving method and apparatus |