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Class Information
Number: 277/328
Name: Seal for a joint or juncture > Seal for well apparatus > Longitudinally actuated packer for above ground apparatus
Description: Seal for well apparatus wherein the seal is between axially spaced members where one or more of the members axially bias the seal into sealing engagement at the joint or juncture between the part (e.g., axial rod, pipe, drill stem, etc.) surrounded by another part (e.g., well casing) intended to function or remain at ground level.










Sub-classes under this class:

Class Number Class Name Patents
277/329 Contained or compressed by gland member in packing box 54


Patents under this class:

Patent Number Title Of Patent Date Issued
8479809 Anti-extrusion backup system, packing element system having backup system, and method Jul. 9, 2013
8186426 Wellhead seal assembly May. 29, 2012
7665738 Self-tightening type sealing device Feb. 23, 2010
7559366 Flex-lock metal seal system for wellhead members Jul. 14, 2009
6705615 Sealing system and method Mar. 16, 2004
6510895 Energized sealing cartridge for annulus sealing between tubular well components Jan. 28, 2003
6176310 Assembly for sealing the annulus between concentric cylindrical surfaces Jan. 23, 2001
5904354 Mechanically energized element May. 18, 1999
5615736 Unitary diversionary-tubing hanger and energizable rod seal Apr. 1, 1997
5456314 Wellhead annulus seal Oct. 10, 1995
5257792 Well head metal seal Nov. 2, 1993
5183268 Metal-to-metal wellhead seal for rough casing Feb. 2, 1993
5129660 Seal assembly for a well housing hanger structure Jul. 14, 1992
5110144 Casing hanger seal assembly May. 5, 1992
5067734 Metal seal with grooved inlays Nov. 26, 1991
5066029 Annular sealing apparatus Nov. 19, 1991
4932472 Packoff with flexible section for casing hanger Jun. 12, 1990
4921259 Packoff seal with dual member engaging means May. 1, 1990
4907812 Bi-directional unsupported area seal Mar. 13, 1990
4900067 Retrievable packoff with an embedded flexible, metallic band Feb. 13, 1990
4900041 Subsea well casing hanger packoff system Feb. 13, 1990
4832125 Wellhead hanger and seal May. 23, 1989
4823871 Hanger and seal assembly Apr. 25, 1989
4790572 Tapered wedge packoff assembly for a casing hanger Dec. 13, 1988
4784222 Wellhead sealing assembly Nov. 15, 1988
4771828 Wellhead seals Sep. 20, 1988
4766956 Wellhead annular seal Aug. 30, 1988
4759409 Subsea wellhead seal assembly Jul. 26, 1988
4757860 Wellhead equipment Jul. 19, 1988
4751965 Wellhead seal assembly Jun. 21, 1988
4742874 Subsea wellhead seal assembly May. 10, 1988
4718679 Lockdown ring assembly for wellhead seal Jan. 12, 1988
4702481 Wellhead pack-off with undulated metallic seal ring section Oct. 27, 1987
4665979 Metal casing hanger seal with expansion slots May. 19, 1987
4645214 Wellhead sealing assembly Feb. 24, 1987
4606698 Centrifugal blood pump with tapered shaft seal Aug. 19, 1986
4595053 Metal-to-metal seal casing hanger Jun. 17, 1986
4556224 Crossover seal assembly Dec. 3, 1985
4521040 Combined metal and elastomer seal Jun. 4, 1985
4473230 Tension hanger embodying fire resistant sealing means Sep. 25, 1984
4390063 Geothermal wellhead packing assembly Jun. 28, 1983
4381868 Pressure-actuated wellhead sealing assembly May. 3, 1983
4372563 Packing support for mounting a well casing packing Feb. 8, 1983
4353560 Metal seal assembly with deformable sealing ring Oct. 12, 1982
4324422 Low torque pack-off seal assembly with retrievable lower section Apr. 13, 1982
4291889 Seal for wellheads Sep. 29, 1981
4131287 Annular seal Dec. 26, 1978
4023814 Tree saver packer cup May. 17, 1977
4008898 Well apparatus Feb. 22, 1977











 
 
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