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Class Information
Number: 166/179
Name: Wells > Packers or plugs
Description: Devices insertable from the top of or well into a well conduit and comprising: (1) Means usually known as a packer and comprising a vertical or longitudinally extending tubular member forming a fluid passage and an annular means projecting from the member and blocking fluid flow either up or down or both in the annular space between the tubular member and the surrounding well conduit, said means comprising structure which goes beyond a mere packing assembly or (2) means usually known as a plug and comprising a means for blocking the flow of fluid either up or down or both in a surrounding well conduit by filling the bore of the conduit.

Sub-classes under this class:

Class Number Class Name Patents
166/180 Adjustable over pipe or set over prepositioned pipe 30
166/196 Central support has shoulders expanding sealing portion, or telescopes 136
166/188 Controllable passage through packer 114
166/202 Cup type 111
166/195 Deformable portion engages conduit restriction 67
166/187 Expanded by confined fluid from central chamber, pump or plunger 421
166/192 Flow stopping type; e.g., plug 185
166/189 For non-concentric members 24
166/203 Non-deformable type 14
166/141 Sealing portion closes port between central pipe and outside space when unexpanded 12
166/191 Spaced sealing portions 232
166/185 With central conduit and fluid port to space outside 52
166/183 With controllable bypass outside central conduit 38
166/142 With controllable passage between central chamber and space below packer 48
166/184 With controllable passage between central conduit and space above packer or plug 46
166/181 With detachable setting means 86
166/118 With expanding anchor 123

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8689894 Method and composition for zonal isolation of a well Apr. 8, 2014
8684100 Electrically engaged, hydraulically set downhole devices Apr. 1, 2014
8651178 Packer Feb. 18, 2014
8651179 Swellable downhole device of substantially constant profile Feb. 18, 2014
8651180 Hydraulic packer constructed in glass-fiber reinforced epoxy and stainless steel Feb. 18, 2014
8646537 Remotely activated downhole apparatus and methods Feb. 11, 2014
8623251 Extruded and configured lathe-cut packer elements Jan. 7, 2014
8602116 Sequenced packing element system Dec. 10, 2013
8596347 Drillable slip with buttons and cast iron wickers Dec. 3, 2013
8584766 Seal assembly for sealingly engaging a packer Nov. 19, 2013
8567510 Pressure actuable downhole tool and a method for actuating the same Oct. 29, 2013
8561686 Downhole fluid communication apparatus and method Oct. 22, 2013
8561689 Swellable downhole apparatus and support assembly Oct. 22, 2013
8555961 Swellable packer with composite material end rings Oct. 15, 2013
8555959 Compression assembly and method for actuating downhole packing elements Oct. 15, 2013
8550156 Swelling packer Oct. 8, 2013
8490689 Bridge style fractionation plug Jul. 23, 2013
8474523 Method and apparatus for treatment of a perforated casing Jul. 2, 2013
8469087 Interface for deploying wireline tools with non-electric string Jun. 25, 2013
8453750 Well tools utilizing swellable materials activated on demand Jun. 4, 2013
8448713 Inflatable tool set with internally generated gas May. 28, 2013
8448711 Pressure balanced drilling system and method using the same May. 28, 2013
8408319 Control swelling of swellable packer by pre-straining the swellable packer element Apr. 2, 2013
8403035 Sealing and anchoring device for use in a well Mar. 26, 2013
8403060 Wellhead tree pressure limiting device Mar. 26, 2013
8397803 Packing element system with profiled surface Mar. 19, 2013
8376044 Plug device Feb. 19, 2013
8353355 Drill string/annulus sealing with swellable materials Jan. 15, 2013
8342239 Swellable downhole packer Jan. 1, 2013
8336615 Low pressure-set packer Dec. 25, 2012
8336616 Frac plug Dec. 25, 2012
8322448 Device for plug removal Dec. 4, 2012
8312921 Method and apparatus for selective treatment of a perforated casing Nov. 20, 2012
8297368 Systems and methods for initiating annular obstruction in a subsurface well Oct. 30, 2012
8276677 Coiled tubing bottom hole assembly with packer and anchor assembly Oct. 2, 2012
8235108 Swell packer and method of manufacturing Aug. 7, 2012
8235123 Separating device Aug. 7, 2012
8230936 Methods of forming acid particle based packers for wellbores Jul. 31, 2012
8225870 Method for making windows in oil well casings Jul. 24, 2012
8225880 Method and system for zonal isolation Jul. 24, 2012
8220536 Downhole fluid communication apparatus and method Jul. 17, 2012
8220538 Plug Jul. 17, 2012
8207096 Compressible packer fluids and methods of making and using same Jun. 26, 2012
8191644 Temperature-activated swellable wellbore completion device and method Jun. 5, 2012
8151873 Expandable packer with mandrel undercuts and sealing boost feature Apr. 10, 2012
8151879 Zone isolation assembly and method for isolating a fluid zone in an existing subsurface well Apr. 10, 2012
8141626 Packer-anchoring device Mar. 27, 2012
8127978 Swelling packer and method of construction Mar. 6, 2012
8118092 Swelling delay cover for a packer Feb. 21, 2012
8100190 Methods for swelling swellable elements in a portion of a well using a water-in-oil emulsion Jan. 24, 2012

1 2 3 4

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