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Class Information
Number: 166/131
Name: Wells > Packers or plugs > With expanding anchor > With controllable passage between central conduit and space above packer or plug
Description: Devices wherein there is a fluid passage between a central conduit which supports the packer or plug from the top of the well while it is being run into the well and the annular space above the packer or plug, between the central conduit and the surrounding conduit, the passage being controllable by a valve, closure or changeable restriction.

Patents under this class:

Patent Number Title Of Patent Date Issued
8267177 Means for creating field configurable bridge, fracture or soluble insert plugs Sep. 18, 2012
7770634 Gas lift apparatus for flushing and snubbing well Aug. 10, 2010
7770637 Bypass gas lift system and method for producing a well Aug. 10, 2010
7607487 Packers and methods of use Oct. 27, 2009
6702015 Method and apparatus for deploying power cable and capillary tube through a wellbore tool Mar. 9, 2004
6578638 Drillable inflatable packer & methods of use Jun. 17, 2003
6152224 Downhole apparatus Nov. 28, 2000
6142226 Hydraulic setting tool Nov. 7, 2000
5746274 One trip cement and gravel pack system May. 5, 1998
5595246 One trip cement and gravel pack system Jan. 21, 1997
5404956 Hydraulic setting tool and method of use Apr. 11, 1995
5390737 Downhole tool with sliding valve Feb. 21, 1995
5174379 Gravel packing and perforating a well in a single trip Dec. 29, 1992
5146994 Packing assembly for use with reeled tubing and method of operating and removing same Sep. 15, 1992
5029643 Drill pipe bridge plug Jul. 9, 1991
5000265 Packing assembly for use with reeled tubing and method of operating and removing same Mar. 19, 1991
4915175 Well flow device Apr. 10, 1990
4856583 Apparatus for treating well bores Aug. 15, 1989
4823881 Hydraulic setting tool Apr. 25, 1989
4722400 Mechanically actuated subsurface injection tool Feb. 2, 1988
4635716 Gravel packer Jan. 13, 1987
4633943 Gravel packer Jan. 6, 1987
4605062 Subsurface injection tool Aug. 12, 1986
4583593 Hydraulically activated liner setting device Apr. 22, 1986
4522264 Apparatus and method for treating wells Jun. 11, 1985
4519451 Well treating equipment and methods May. 28, 1985
4460041 Subterranean well tool with pressure equalizing release Jul. 17, 1984
4436150 Bridge plug Mar. 13, 1984
4432417 Control pressure actuated downhole hanger apparatus Feb. 21, 1984
4401158 One trip multi-zone gravel packing apparatus Aug. 30, 1983
4385664 Frangible cup thermal packer assembly for cased wells May. 31, 1983
4350205 Work over methods and apparatus Sep. 21, 1982
4284137 Anti-kick, anti-fall running tool and instrument hanger and tubing packoff tool Aug. 18, 1981
4258787 Subterranean well injection apparatus Mar. 31, 1981
4127168 Well packers using metal to metal seals Nov. 28, 1978
4050512 Stroke actuated well testing tool Sep. 27, 1977
4049055 Gravel pack method, retrievable well packer and gravel pack apparatus Sep. 20, 1977
3990510 Releasable well anchor tool Nov. 9, 1976

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