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Class Information
Number: 137/155
Name: Fluid handling > Diverse fluid containing pressure systems > Gas lift valves for wells
Description: Apparatus which controls a gas to be injected or introduced into the liquid column of well to elevate the liquid.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8162060 Gas-lift valve and method of use Apr. 24, 2012
7882832 Solar pump systems and related methods Feb. 8, 2011
7669659 System for preventing hydrate formation in chemical injection piping for subsea hydrocarbon production Mar. 2, 2010
7658229 Gas lift chamber purge and vent valve and pump systems Feb. 9, 2010
7428929 Method and apparatus for lifting liquids from gas wells Sep. 30, 2008
7370706 Gas lift valve for high pressure operation May. 13, 2008
7278489 Gas turbine for oil lifting Oct. 9, 2007
7213607 Mandrel for a gas lift valve May. 8, 2007
7210532 Method and apparatus for lifting liquids from gas wells May. 1, 2007
7104330 Marine riser tower Sep. 12, 2006
6932581 Gas lift valve Aug. 23, 2005
6827146 Double bellows gas lift valve "faustoval" Dec. 7, 2004
6810955 Gas lift mandrel Nov. 2, 2004
6715550 Controllable gas-lift well and valve Apr. 6, 2004
6568473 Gas lift valve with central body venturi May. 27, 2003
6305402 Variable orifice gas lift valve for high flow rates with detachable power source and method of using Oct. 23, 2001
6231312 Variable orifice gas lift valve for high flow rates with detachable power source and method of using May. 15, 2001
6206645 Variable orifice gas lift valve for high flow rates with detachable power source and method of using Mar. 27, 2001
6148843 Variable orifice gas lift valve for high flow rates with detachable power source and method of using Nov. 21, 2000
6070608 Variable orifice gas lift valve for high flow rates with detachable power source and method of using Jun. 6, 2000
6068015 Sidepocket mandrel with orienting feature May. 30, 2000
RE36566 Spoolable coiled tubing mandrel and gas lift valves Feb. 15, 2000
5979553 Method and apparatus for completing and backside pressure testing of wells Nov. 9, 1999
5971004 Variable orifice gas lift valve assembly for high flow rates with detachable power source and method of using same Oct. 26, 1999
5896924 Computer controlled gas lift system Apr. 27, 1999
5871048 Determining an optimum gas injection rate for a gas-lift well Feb. 16, 1999
5806598 Apparatus and method for removing fluids from underground wells Sep. 15, 1998
5782261 Coiled tubing sidepocket gas lift mandrel system Jul. 21, 1998
5743717 Nozzle-venturi gas lift flow control device Apr. 28, 1998
5535767 Remotely actuated adjustable choke valve and method for using same Jul. 16, 1996
5522418 Differential pressure operated gas lift valve Jun. 4, 1996
5515880 Spoolable coiled tubing mandrel and gas lift valves May. 14, 1996
5483988 Spoolable coiled tubing mandrel and gas lift valves Jan. 16, 1996
5469878 Coiled tubing concentric gas lift valve assembly Nov. 28, 1995
5465747 Pressure valve assembly for use in gas-lift producing oil-wells Nov. 14, 1995
5427133 Coiled tubing wireline retrievable and selective set gas lift assembly Jun. 27, 1995
5217067 Apparatus for increasing flow in oil and other wells Jun. 8, 1993
5176164 Flow control valve system Jan. 5, 1993
5172717 Well control system Dec. 22, 1992
5170815 Coiled tubing gas lift assembly Dec. 15, 1992
5152343 Reeled tubing gas lift mandrel Oct. 6, 1992
5107441 System for evaluating the flow performance characteristics of a device Apr. 21, 1992
5069242 Gas lift valve utilizing a diaphragm pilot Dec. 3, 1991
5056599 Method for treatment of wells Oct. 15, 1991
5022427 Annular safety system for gas lift production Jun. 11, 1991
5004007 Chemical injection valve Apr. 2, 1991
4625941 Gas lift valve Dec. 2, 1986
4620597 High pressure injection valve Nov. 4, 1986
4592380 Gas lift valve Jun. 3, 1986
4565215 Chemical injection valve Jan. 21, 1986

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