Wellhead Component with Seal Surface and Method of Forming the Seal
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United States of America Patent
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app pub date -
Aug 7, 2015
filing date -
Dec 2, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A subset wellhead component has a metal seal surface having voids. The voids are initially filled with an elastomeric substrate having hollow beads. When lowered into the subsea assembly, the beads have sufficient strength to resist collapsing under a hydrostatic pressure of liquid within the subsea wellhead assembly to prevent shrinking of a volume of the substrate. Exerting a setting force on the metal seal surface to form the sealing engagement causes the beads to collapse and reduce the volume of the substrate within the voids. The seal surface may be folds of a bellows-type nose ring of a seal assembly. The seal surface may alternately be wickers formed in the bore of the wellhead housing.
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