Casing hanger packoff with C-shaped metal seal
Patent
·
OSTI ID:5568418
This patent describes a wellhead assembly having a well head within which a casing hanger lands, an improved packoff assembly for sealing between the wellhead and the casing hanger, comprising in combination: a frusto-conical tapered sealing surface formed on the casing hanger; metal upper and lower rings; an annular metal seal member, the seal member having located between the upper and lower rings a single upper lip and a single lower lip, each facing outward for metal-to-metal sealing contact with the wellhead, the upper and lower lips being connected together with a single C-shaped curved section that has a single central portion facing inward for metal-to-metal sealing contact with the tapered sealing surface on the casing hanger, the upper and lower lips being connected to the upper and lower rings, respectively; and means for moving the upper ring downward relative to the lower ring to deform the metal seal member, the tapered sealing surface pushing the lips into sealing engagement with the wellhead.
- Assignee:
- Vetco Gray, Inc., Houston, TX
- Patent Number(s):
- US 4842061
- OSTI ID:
- 5568418
- Country of Publication:
- United States
- Language:
- English
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