Pipe joints or couplings – With assembly means or feature – Guide and support
Patent
1988-09-27
1990-01-16
Arola, Dave W.
Pipe joints or couplings
With assembly means or feature
Guide and support
285 39, 285315, F16L 3500
Patent
active
048938424
ABSTRACT:
A conductor tieback connector is connected to the lower end of a string of risers and has a downwardly extending funnel that fits over a wellhead. A two-piece internal floating bushing is moved within the interior of the wellhead from an upper position to a lower engaged postion. Locking dogs are pushed outward by an outer ring which is rotated by a running tool. These locking dogs engage grooves in the wellhead. The locking dogs and the wellhead grooves have inclined load shoulders. The dimensions between the abutting surfaces of the wellhead connector and the load shoulders are selected so as to create a preload force.
REFERENCES:
patent: 3489436 (1970-01-01), Ahlstone
patent: 4343495 (1982-08-01), Nobileau et al.
patent: 4372584 (1983-02-01), Miller
patent: 4451056 (1984-05-01), Galle
patent: 4696493 (1987-09-01), Brummer
Arola Dave W.
Bradley James E.
Vetco Gray Inc.
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