Casing hanger seal locking mechanism
Patent
·
OSTI ID:6471041
In a well having a wellhead housing with a bore therethrough for supporting a casing hanger, the casing hanger having an exterior wall surface spaced inward from an interior wall surface in the bore, an improved means for sealing the wall surfaces between the casing hanger and the wellhead housing. It comprises: serrations formed on one of the wall surfaces, each of the serrations having an inclined downward facing flank; a seal member, having a seal section which is compressed between the wall surfaces below the serrations; a locking section on the seal member located directly above the seal section, the locking section having inner and outer cylindrical walls radially separated from each other; serrations formed on one of the cylindrical walls of the locking section, each of the serrations on the locking section having an inclined upward facing flank; and means including an energizing ring for downward movement between the walls of the locking section.
- Assignee:
- Vetco Gray Inc., Houston, TX (USA)
- Patent Number(s):
- A; US 4949787
- Application Number:
- PPN: US s 7-336012
- OSTI ID:
- 6471041
- Country of Publication:
- United States
- Language:
- English
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