Metal-to-metal annulus wellhead style seal with pressure energized from above and below
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United States of America Patent
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Mar 16, 2021
Grant Date -
Oct 10, 2019
app pub date -
Apr 5, 2019
filing date -
Apr 6, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
A system is disclosed as including a seal for sealing an area between a hanger and a housing of a wellhead. The seal is provided with at least a notch that defines at least a movable portion such as a wing or a lip. An e-ring is provided for a first energizing of the seal. The movable portion enables pressurized fluid from beneath the seal to cause the movable portion to protrude further against a mating side in the wellhead and the hanger for a second energizing of the seal. This type of seal maintains or improves the sealing of the wellhead in high pressure applications. Methods applied to the above seal are also disclosed.
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