Unidirectional environment barrier seal for subsea wellhead equi

Details Unidirectional environment barrier seal for subsea wellhead equi Unidirectional environment barrier seal for subsea wellhead equi

1995-02-10

1999-08-24

Knight, Anthony

Seal for a joint or juncture

Seal for well apparatus

277608, 277614, 277626, 277914, 277928, E21B 3303, F16L 1706, F16J 1502

Patent

active

059415304

ABSTRACT:
A sealing arrangement for a subsea wellhead component is provided which comprises a primary seal to prevent leakage of internal pressure from within the wellhead component and a secondary seal surrounding the primary seal to prevent entry of ambient pressure into the wellhead component. The secondary seal is adapted to permit pressure which leaks past the primary seal to also leak past the secondary seal and vent to the atmosphere to provide an indication during testing of the primary seal that the primary seal has failed.

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