Wellhead metal seal with energizing ring having trapped fluid reliefs
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United States of America Patent
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May 29, 2018
Issued Date -
N/A
app pub date -
Mar 31, 2016
filing date -
Mar 31, 2016
priority date (Note) -
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Abstract
A wellhead housing has a bore with an inner seal surface. A hanger with an outer seal surface lands in the bore. Wickers are formed on at least one of the seal surfaces. A metal seal ring lands between the seal surfaces, the seal ring having annular inner and outer legs separated by an annular slot. An energizing ring has inner and outer diameter surfaces that slide against the inner and outer legs of the seal ring when the energizing ring is moved downward in the slot to radially deform the inner and outer legs into sealing engagement with the wellhead housing and hanger. The energizing ring has an inner diameter relief and an outer diameter relief, each being a partially circumferential groove extending upward from a lower rim. The reliefs define a bridge of narrower radial thickness in the lower rim.
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