Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685)
11/1997
11/13/1997WO1997028349A3 Downhole valve
11/11/1997US5685372 Temporary plug system
11/11/1997CA2106698C Differential pressure operated circulating and deflation valve
11/06/1997WO1997041333A1 Method and apparatus for remote control of multilateral wells
11/04/1997US5682921 To control flow in a fluid transmission conduit in a subterranean well
10/1997
10/22/1997EP0802304A1 Circulating valve
10/22/1997EP0801704A1 Method for injecting fluid into a wellbore
10/21/1997US5678633 Shifting tool
10/18/1997CA2202726A1 Circulating valve responsive to fluid flow rate therethrough and associated methods of servicing a well
10/14/1997US5676208 Method of gravel packing a subterranean well
10/09/1997WO1997037102A2 Downhole flow control devices
10/08/1997EP0599876B1 Multi-sensor relief valve well test system
10/04/1997CA2201661A1 Valve actuator
10/02/1997WO1997036089A1 Hydraulic sliding side-door sleeve
10/02/1997WO1997036088A1 Actuating ball
09/1997
09/25/1997WO1997035093A1 Method and apparatus using coiled-in-coiled tubing
09/24/1997EP0796979A2 Floating apparatus for downhole use and method of making it
09/23/1997US5669448 Overbalance perforating and stimulation method for wells
09/23/1997CA2172477A1 Dump/stop valve for surface controller subsurface safety valve
09/17/1997EP0795091A1 A mechanical overload protection device
09/17/1997EP0795074A1 Method and apparatus for drilling with high-pressure, reduced solid content liquid
09/10/1997EP0794317A2 Apparatus and method for injecting fluids in a well
09/09/1997US5664629 Method of providing a time delay for a down-hole tool
09/07/1997CA2196933A1 Multipurpose tool
08/1997
08/26/1997US5660234 Shallow flow wellhead system
08/26/1997CA2114307C Environmentally secure polished rod liner head
08/21/1997WO1997030269A1 Motor drive actuator for downhole flow control devices
08/20/1997EP0550569B1 Valve control apparatus
08/20/1997CN2260167Y Theft-proof water injection well head equipment
08/12/1997US5655607 Downhole tool for pressure testing of oil and gas wells
08/07/1997WO1997028349A2 Downhole valve
08/07/1997CA2245075A1 Improved downhole apparatus
07/1997
07/31/1997WO1997027382A1 Completions insertion and retrieval under pressure (cirp) apparatus including the snaplock connector
07/30/1997EP0786577A2 Sand control screen assembly having an adjustable flow rate and associated methods of completing a subterranean well
07/30/1997EP0786044A1 Subsurface safety valve of minimized length
07/25/1997CA2195712A1 Sand control screen assembly having an adjustable flow rate and associated methods of completing a subterranean well
07/22/1997US5649597 Method for pressure testing a pipe string in a well bore
07/15/1997US5647434 Floating apparatus for well casing
07/09/1997EP0783075A2 Method and apparatus for producing hydrocarbons
06/1997
06/26/1997WO1997022781A1 Improved measurement port coupler and probe interface
06/26/1997WO1997013954A3 Mill for wellbore milling operations
06/24/1997US5641245 Apparatus for passive removal of subsurface contaminants
06/24/1997US5641023 Shifting tool for a subterranean completion structure
06/24/1997US5641021 Well casing fill apparatus and method
06/24/1997CA2108914C Formation testing apparatus and method
06/17/1997US5638904 Within wells
06/12/1997WO1997021020A1 Down hole bypass valve
06/11/1997CN1151783A Logging or measurement while tripping
06/10/1997US5636694 Hydraulic power stroker for shifting of sliding sleeves
06/10/1997US5636661 Self-piloting check valve
05/1997
05/28/1997EP0775804A2 Completely removable bidirectional plug
05/28/1997EP0775803A2 Linear indexing apparatus and methods of using same
05/21/1997EP0774564A2 Well casing fill apparatus and method
05/21/1997EP0596900B1 Valve actuator
05/13/1997US5628624 Pump barrel valve assembly including seal/actuator element
05/13/1997US5628493 Oilfield valve
05/09/1997WO1997016623A1 Inflow regulation device for a production pipe for production of oil or gas from an oil- and/or gas reservoir
05/09/1997WO1997011252A3 Simplified xmas tree using sub-sea test tree
05/09/1997CA2236264A1 Inflow regulation device for a production pipe for production of oil or gas from an oil- and/or gas reservoir
05/02/1997EP0770167A1 Completion sub-sea test tree
04/1997
04/29/1997US5623994 Well head cutting and capping system
04/24/1997WO1997014868A1 Purging means for purging upwards in ring spacing between drill pipe and bore hole wall
04/23/1997EP0769092A1 Hydraulic shifting tool for sliding sleeves
04/23/1997CN2252883Y Bibb for oil field downhole operating
04/17/1997WO1997013954A2 Mill for wellbore milling operations
04/16/1997EP0767862A1 Well completion lubricator valve
04/09/1997EP0766775A1 Logging or measurement while tripping
04/08/1997US5618022 Variable orifice valve
04/03/1997WO1997012113A1 Method and apparatus for selective horizontal well re-entry using retrievable diverter oriented by logging means
03/1997
03/30/1997CA2186770A1 Apparatus for measuring pressure
03/29/1997CA2186173A1 Pressure-actuated valve and method
03/27/1997WO1997011253A1 Single bore riser system
03/27/1997WO1997011252A2 Simplified xmas tree using sub-sea test tree
03/18/1997CA2120798C Annular safety system
03/18/1997CA2061571C Hydraulic system for electronically controlled downhole testing tool
03/11/1997US5609204 Isolation system and gravel pack assembly
03/11/1997US5609178 Pressure-actuated valve and method
03/11/1997CA2101982C Selective downhole operating system and method
03/05/1997EP0760418A2 Check valve and check valve seat
02/1997
02/20/1997WO1997006344A1 Downhole apparatus
02/20/1997WO1997006319A1 Piston valve
02/20/1997CA2228840A1 Downhole apparatus
02/19/1997CN2247719Y Christmas tree
02/13/1997WO1997005362A1 Downhole valve
02/13/1997WO1997005361A1 Safeguarded method and apparatus for fluid communication using coiled tubing, with application to drill stem testing
02/13/1997WO1996034176A3 Hydraulic shifting tool for sliding sleeves
02/12/1997CN2247231Y Manual gate plate blowout preventer
02/06/1997WO1997004212A1 System for controlling production from a gas-lifted oil well
02/06/1997WO1996027732A3 Shifting tool, releasing mechanism, position feedback method and method of releasing
02/05/1997EP0757156A2 Shifting tool for a subterranean completion structure
02/04/1997US5598864 Subsurface safety valve
01/1997
01/29/1997EP0756065A1 System for controlling production from a gas-lifted oil well
01/29/1997EP0668969B1 Sludger
01/28/1997US5597041 Well head cutting and capping system
01/28/1997US5597016 Mechanical lockout for pressure responsive downhole tool
01/28/1997CA2111736C Surface control of well annulus pressure
01/23/1997WO1996038651A3 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
01/23/1997WO1996034175A3 Cementing plug
01/21/1997CA2087866C Drill stem testing with tubing conveyed perforation
01/15/1997EP0753646A2 Differential pressure test/bypass valve well tool