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