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Class Information
Number: 277/322
Name: Seal for a joint or juncture > Seal for well apparatus
Description: Sealing means wherein the sealing means is for use in a device or mechanism that extracts fluid from earth (e.g., a well, pump, etc.) or bores or penetrates the earth.










Sub-classes under this class:

Class Number Class Name Patents
277/335 Axially facing packing cup 24
277/336 For below ground apparatus 171
277/324 For overpressure control device (e.g., seal for a blowout preventer, etc.) 33
277/331 Inflatable packer 34
277/323 Installation, removal, assembly, disassembly, or repair feature 33
277/328 Longitudinally actuated packer for above ground apparatus 49
277/343 Seal (e.g., wiper, oil saver, stripper, etc.) accommodates irregular size of inner part 39
277/344 Segmented radially actuated packer (e.g., oil saver, gas saver, etc.) for above ground apparatus 4


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8690551 Modular seal bladder for high temperature applications Apr. 8, 2014
8636072 Wellhead assembly having seal assembly with axial restraint Jan. 28, 2014
8490979 Method for reducing extrusion of sealing elements Jul. 23, 2013
8403332 Seal member Mar. 26, 2013
8312922 Metal-to-metal seal with travel seal bands Nov. 20, 2012
8167312 Metal seal adjustable casing sub May. 1, 2012
8051913 Downhole gap sealing element and method Nov. 8, 2011
7919563 Low molecular weight hydrogenated nitrile rubber Apr. 5, 2011
7861789 Metal-to-metal seal for bridging hanger or tieback connection Jan. 4, 2011
7772328 Low molecular weight hydrogenated nitrile rubber Aug. 10, 2010
7578354 Device and method to seal boreholes Aug. 25, 2009
7467663 High pressure wellhead assembly interface Dec. 23, 2008
7416770 Reinforcement ring Aug. 26, 2008
7228915 Device and method to seal boreholes Jun. 12, 2007
6780939 Low molecular weight hydrogenated nitrile rubber Aug. 24, 2004
6752397 Redundant metal-metal seal Jun. 22, 2004
6371487 Gimbal and seal for the drivehead of a downhole rotary pump Apr. 16, 2002
6167963 Removable non-metallic bridge plug or packer Jan. 2, 2001
5975589 Hydraulic coupling Nov. 2, 1999
5941530 Unidirectional environment barrier seal for subsea wellhead equipment and valves Aug. 24, 1999
5799949 Annular chamber seal Sep. 1, 1998
5791657 Seals containing composite non-extrusion springs Aug. 11, 1998
5765834 Sealing device Jun. 16, 1998
5639227 Seal arrangement for the drivehead of a downhole rotary pump Jun. 17, 1997
5507504 Sealing device with c-shaped lips and central projection Apr. 16, 1996
5464063 Well assembly metal seal Nov. 7, 1995
5447026 Hydraulic oil well pump drive system Sep. 5, 1995
5409073 Rotating head with elastomeric member rotating assembly Apr. 25, 1995
5358054 Method and apparatus for controlling steam breakthrough in a well Oct. 25, 1994
5355961 Metal and elastomer casing hanger seal Oct. 18, 1994
5330201 Sealing assembly Jul. 19, 1994
5322137 Rotating head with elastomeric member rotating assembly Jun. 21, 1994
5297805 Sealing ring Mar. 29, 1994
5285853 Casing hanger seal with test port Feb. 15, 1994
5224715 Supported-lip low interference metal stab seal Jul. 6, 1993
5201835 Wellhead seal with protective rib Apr. 13, 1993
5193616 Tubing hanger seal assembly Mar. 16, 1993
5180008 Wellhead seal for wide temperature and pressure ranges Jan. 19, 1993
5167283 Combination ball valve and annular pipe seal Dec. 1, 1992
5165704 Blowout preventer bonnet seal carrier Nov. 24, 1992
5149148 Pipe swivel joint with improved bore seal Sep. 22, 1992
5137084 Rotating head Aug. 11, 1992
5114158 Packing assembly for oilfield equipment and method May. 19, 1992
5111879 Sanitary locking lip split well seal May. 12, 1992
5105879 Method and apparatus for sealing at a sliding interface Apr. 21, 1992
5094297 Casing weight set seal ring Mar. 10, 1992
5069278 Leakage control device Dec. 3, 1991
5067874 Compressive seal and pressure control arrangements for downhole tools Nov. 26, 1991
5062479 Stripper rubbers for drilling heads Nov. 5, 1991
4955436 Seal apparatus Sep. 11, 1990

1 2 3










 
 
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