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Class Information
Number: 277/327
Name: Seal for a joint or juncture > Seal for well apparatus > For overpressure control device (e.g., seal for a blowout preventer, etc.) > Axially compressed ring
Description: Overpressure control device wherein the seal has an annular shape and is concentric to the annular passage including means acting along an annular axial flow path formed by the annular passage axis to squeeze the seal.

Patents under this class:

Patent Number Title Of Patent Date Issued
8631878 Wellhead annulus seal assembly and method of using same Jan. 21, 2014
8166993 Method and systems for using a shim plate for increased strength May. 1, 2012
7789161 Apparatus for interconnecting and sealing between fixed and rotating conduits and methods of installing same Sep. 7, 2010
7343968 Washpipe seal assembly Mar. 18, 2008
6649836 Compressor electronics housing Nov. 18, 2003
6425444 Method and apparatus for downhole sealing Jul. 30, 2002
6394461 Pressure compensated stuffing box for reciprocating pumping units May. 28, 2002
5851013 Blowout preventer packing element with metallic inserts Dec. 22, 1998
5588491 Rotating blowout preventer and method Dec. 31, 1996
5361832 Annular packer and insert Nov. 8, 1994
5325925 Sealing method and apparatus for wellheads Jul. 5, 1994
5116017 Annular sealing element with self-pivoting inserts for blowout preventers May. 26, 1992
4949785 Force-limiting/wear compensating annular sealing element for blowout preventers Aug. 21, 1990
4858882 Blowout preventer with radial force limiter Aug. 22, 1989
4657263 Annular packing unit and insert Apr. 14, 1987
4605195 Annular blowout preventer packing unit Aug. 12, 1986
4602794 Annular blowout preventer with upper and lower spherical sealing surfaces and rigid translation element Jul. 29, 1986
4579314 Annular blowout preventer Apr. 1, 1986
4508311 Annular blowout preventer Apr. 2, 1985
4461448 Well blowout preventer, and packing element Jul. 24, 1984
4460151 Annular blowout preventer Jul. 17, 1984
4460150 Annular blowout preventer Jul. 17, 1984
4460149 Annular blowout preventer with upper and lower spherical sealing surfaces Jul. 17, 1984
4452421 Well blowout preventer, and packing element Jun. 5, 1984
4448255 Rotary blowout preventer May. 15, 1984
4444401 Flow diverter seal with respective oblong and circular openings Apr. 24, 1984
4360186 Swivel joint Nov. 23, 1982
4339107 Well blowout preventer packer assembly and packer modules therefor Jul. 13, 1982
4310139 Annular blowout preventer Jan. 12, 1982
4099699 Annular blowout preventer Jul. 11, 1978
4098516 Blowout preventer packing unit with slanted reinforcing inserts Jul. 4, 1978
4098341 Rotating blowout preventer apparatus Jul. 4, 1978
4095805 Annular blowout preventer Jun. 20, 1978

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