Metal-to-metal/elastomeric pack-off assembly for subsea wellhead systems
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United States of America Patent
Stats
-
Jan 19, 1988
Grant Date -
N/A
app pub date -
Aug 18, 1986
filing date -
Aug 18, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A wellhead system having a casing hanger (C) with a first sealing surface (20) within a wellhead (W) with a second sealing surface (16) spaced from said first sealing surface (20) forming annulus (14) in combination with a pack-off assembly (P) including a wedge ring (42), which in this embodiment, supports a pack-off (64) which has a first metal-to-metal seal (S-1) which sealingly engages the first sealing surface (20) upon initial movement of the pack-off (64) into the annulus (14) and a second metal-to-metal seal (S-1) which sealingly engages the second sealing surface (16) upon further movement of the wedge ring (42) urging said second pack-off seal (S-2) radially outwardly towards the first sealing surface (20). Each metal-to-metal seal may be provided with elastomeric sealing means. Two types of metal-to-metal seals (S-1, S-2) and two types of lock down means, wicker ring (40) and split ring (10), are disclosed.
First Claim
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International Classification(s)
- Non-US Classification not provided for expired patents
Cited Art Landscape
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- Citation Ranking not provided for expired patents
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