Pipe joints or couplings – Serial,relatively movable portions – Linked ball and socket portions
Patent
1988-08-08
1990-04-03
Callaghan, Thomas F.
Pipe joints or couplings
Serial,relatively movable portions
Linked ball and socket portions
166208, F21B 1910, F16L 2100
Patent
active
049134698
ABSTRACT:
An improved wellhead slip and seal assembly including a slip assembly with slips supported within a slip bowl and a seal assembly positioned above the slip assembly and interconnected thereto for supporting the slip assembly, the seal assembly including two segments connected to form the seal ring and each of the segments includes arcuate elements embedded in a resilient material which forms an inner seal in an inner groove, the inner seal having an inner diameter sufficient smaller than the outer diameter of the pipe to which it is to seal and an outer seal of the resilient material in an outer groove, the outer seal having an outer diameter sufficiently larger than the inner diameter of the wellhead housing into which it is inserted so that both seals are brought into direct sealing engagement with their respective pipe and housing sealing surfaces and the loading on the slip bowl is not a seal compressing load through the connection between the seal assembly and the slip assembly. The segments of the slip bowl include segments interconnected by toe nails and the seal ring includes pin and recess connection for connecting the two segments together. Sufficient resilient material is used so that joining of the segments seals along the axial edges thereof.
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Callaghan Thomas F.
Cameron Iron Works USA Inc.
Knight Anthony
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