Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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01/22/2004 | WO2004007902A1 Indexing apparatus |
01/22/2004 | US20040011566 Activating ball assembly for use with a by-pass tool in a drill string |
01/21/2004 | CN2600581Y Automatic mud anti-spurt apparatus |
01/20/2004 | US6679336 Multi-purpose float equipment and method |
01/20/2004 | US6679332 Petroleum well having downhole sensors, communication and power |
01/20/2004 | US6679330 Tubing hanger with ball valve |
01/20/2004 | US6679324 Downhole device for controlling fluid flow in a well |
01/20/2004 | CA2266088C Subsea test tree |
01/20/2004 | CA2221406C Normally closed retainer valve with fail-safe pump through capability |
01/15/2004 | WO2004005663A2 Tapered ramp positive lock latch mechanism |
01/15/2004 | WO2003083333A3 Valve system and method |
01/15/2004 | US20040007365 Method and apparatus for locking out a subsurface safety valve |
01/15/2004 | US20040007362 Tapered ramp positve lock latch mechanism |
01/15/2004 | US20040007356 Indexing apparatus |
01/15/2004 | US20040007274 Choke restrictor devices and methods |
01/15/2004 | DE20213365U1 Drosselvorrichtung Throttling device |
01/14/2004 | EP1379755A1 Wireline retrievable safety valve with radial cutting device |
01/14/2004 | EP1235973B1 Wellbore system having non-return valve |
01/14/2004 | CN2599225Y Oil field well water blending flow line assembling device |
01/14/2004 | CN2599224Y Ring type flow process wellhead combined valve |
01/14/2004 | CN2599223Y Wafer valve for oil field |
01/14/2004 | CN2599222Y Well-head gate valve |
01/13/2004 | US6675900 Crossover tree system |
01/13/2004 | US6675891 Apparatus and method for gravel packing a horizontal open hole production interval |
01/13/2004 | US6675889 Tubular filling system |
01/08/2004 | WO2004003336A1 A valve for a fill up tool |
01/08/2004 | WO2003072908A3 Low-flow groundwater sampling system |
01/08/2004 | US20040003926 System and method for fail-safe disconnect from a subsea well |
01/07/2004 | EP1378626A2 System and method for fail-safe disconnect from a subsea well |
01/07/2004 | EP1377727A1 Method and apparatus for controlling downhole flow |
01/07/2004 | CN2597660Y Gate gurgle valve |
01/06/2004 | US6672393 Reciprocating pump dump valve and methods of use |
01/06/2004 | US6672389 Bulged single-hinged scored rupture having a non-circular varying depth score line |
01/06/2004 | CA2212198C Well stabilization tools and methods |
01/01/2004 | US20040000762 Equalizer valve |
01/01/2004 | US20040000407 Curved flapper valve |
01/01/2004 | US20040000406 Downhole surge reduction method and apparatus |
01/01/2004 | US20040000405 Valve for an internal fill up tool |
12/31/2003 | WO2004001177A2 Dockable direct mechanical actuator for downhole tools and method |
12/31/2003 | CN2596002Y Casing pipe sucker |
12/31/2003 | CN2596001Y Well-head water distributor |
12/31/2003 | CN2595993Y Single pipe device for oil-field well-head |
12/31/2003 | CN2595985Y Piston type oil-increasing short joint |
12/30/2003 | US6668937 Pipe assembly with a plurality of outlets for use in a wellbore and method for running such a pipe assembly |
12/30/2003 | US6668936 Hydraulic control system for downhole tools |
12/30/2003 | US6668935 Valve for use in wells |
12/30/2003 | US6668933 Ball valve seat and support |
12/30/2003 | US6668923 Positive indication system for well annulus cement displacement |
12/30/2003 | CA2232014C Simplified xmas tree using sub-sea test tree |
12/30/2003 | CA2158238C Leakproof floating apparatus and method for fabricating said apparatus |
12/30/2003 | CA2105526C Control cartridge for controlling a safety valve in an operating well |
12/25/2003 | US20030234110 Dockable direct mechanical actuator for downhole tools and method |
12/25/2003 | US20030234108 Check enhancer for injecting fluids into a well |
12/25/2003 | US20030234107 Check enhancer |
12/25/2003 | US20030234104 Apparatus and methods for establishing secondary hydraulics in a downhole tool |
12/24/2003 | WO2003106808A1 Plug concealment and diversion tool |
12/24/2003 | CN2594455Y Double-pipe device of oil well hole top |
12/23/2003 | US6666275 Bridge plug |
12/23/2003 | US6666271 Curved flapper and seat for a subsurface saftey valve |
12/23/2003 | US6666270 Reciprocating pump vent-dump valve and methods of use |
12/18/2003 | WO2003064811A3 Sand control screen assembly and treatment method using the same |
12/18/2003 | US20030230190 Apparatus for surface control of a sub-surface safety valve |
12/17/2003 | CN2592857Y Simple oil-recovery well head device |
12/17/2003 | CN2592856Y Continuous adjustable natural gas well external transport pipeline safety protection apparatus |
12/16/2003 | US6662877 Formation isolation valve |
12/16/2003 | US6662875 Induction choke for power distribution in piping structure |
12/16/2003 | US6662869 Ceramic components for high pressure oil wells |
12/11/2003 | WO2003102367A1 Method and apparatus to reduce downhole surge pressure using hydrostatic valve |
12/11/2003 | US20030227393 Wireless power and communications cross-bar switch |
12/11/2003 | US20030226666 Tubing annulus valve |
12/10/2003 | EP1368552A1 Downhole tool |
12/10/2003 | CN2591223Y Contact switch |
12/09/2003 | US6659186 Valve assembly |
12/09/2003 | US6659185 Subsurface safety valve lock out and communication tool and method for use of the same |
12/09/2003 | US6659184 Multi-line back pressure control system |
12/09/2003 | CA2207648C Method and apparatus for drilling with high-pressure, reduced solid content liquid |
12/04/2003 | WO2002066788A8 Fluid flow control apparatus |
12/04/2003 | US20030221839 Double-pin radial flow valve |
12/04/2003 | US20030221837 Method and apparatus to reduce downhole surge pressure using hydrostatic valve |
12/04/2003 | US20030221830 Re-enterable gravel pack system with inflate packer |
12/04/2003 | US20030221824 Downhole isolation device with retained valve member |
12/03/2003 | EP1367217A2 Downhole apparatus |
12/03/2003 | CN2589666Y Settled sand burying-proof standing valve for oil-well pump |
12/02/2003 | US6655455 Flow completion system |
12/02/2003 | US6655454 Check enhancer for injecting fluids into a well |
12/02/2003 | US6655405 BOP operating system with quick dump valve |
11/27/2003 | WO2003097988A2 Equalizer valve and method of use |
11/27/2003 | US20030217843 Tubular filling system |
11/26/2003 | CN2588048Y Pressure-testing valve assembly |
11/26/2003 | CN2588040Y One-direction pressure-fixed joint |
11/26/2003 | CN1458385A Live pipeline valve replacer |
11/25/2003 | US6651738 Downhole isolation device with retained valve member |
11/20/2003 | US20030213597 Safety check valve for coiled tubing |
11/19/2003 | EP1362162A1 Fluid flow control apparatus |
11/18/2003 | US6648070 Insert assembly for a wellhead choke valve |
11/13/2003 | WO2003093633A2 Subsurface valve with system and method for sealing |
11/13/2003 | WO2003093628A1 Remote operated coil connector apparatus |
11/12/2003 | EP1360418A1 Gas lift valve with central body ventury for controlling the flow of injection gas in oil wells producing by continuous gas lift |
11/12/2003 | EP1360392A1 Safety valve for oil wells |
11/12/2003 | CN2585971Y Underground sliding bush switching device of well killing free operation |