Wellhead seal
Patent
·
OSTI ID:6483145
This patent describes an annular wellhead seal comprising: a seal ring having a central body with an inner upwardly facing shoulder, an upper outer rim extending above central body and a lower rim extending below the central body, the central body having a central bore, the shoulder defining an annular surface intersecting the outer rim at an angle and extending substantially from the outer rim to the central bore of the central body, the upper rim having external projections providing a gripping surface and an internal tapered camming surface, the lower rim having internal flexible metal sealing means, and an actuating ring position within the upper rim and having an external tapered camming surface mating with the internal tapered camming surface of the upper rim, the tapered camming surfaces being positioned so that downward movement of the actuating ring forces the upper rim outwardly to cause the external gripping surface projections to engage an inner sealing surface surrounding the upper rim in tight gripping engagement.
- Assignee:
- Cameron Iron Works USA, Inc., Houston, TX
- Patent Number(s):
- US 4791987
- OSTI ID:
- 6483145
- Country of Publication:
- United States
- Language:
- English
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