Pipe joints or couplings – Repair
Patent
1988-04-15
1990-04-03
Arola, Dave W.
Pipe joints or couplings
Repair
2940202, 277 9, 285 93, 2853342, 2853824, 285422, F16L 5518
Patent
active
049134647
ABSTRACT:
An improved tubular joint between two tubular members having their mating ends with inner sealing surfaces tapering outward in the direction toward the other tubular member and with a sealing ring having outer sealing surfaces for engaging the inner sealing surfaces of the tubular members. The improvement lies in the provision of an insert sleeve having a tapered portion and a tubular portion, the insert sleeve is cold forged in place over a damaged sealing surface of one of the tubular members and has a tapered inner sealing surface for sealing with the outer surface of the sealing ring. This improved joint is particularly useful in subsea wellheads. The tight gripping and sealing engagement of the insert sleeve within the tubular member is augmented by grooves within a recess on the interior of the tubular member being repaired or sharp annular teeth around the exterior of the tubular portion of the insert sleeve. In a modified form of the invention, the insert sleeve includes external sharp teeth which when cold forged into a housing recess will dig into the recess surface to provide the tight gripping and sealing engagement. Further a test port is provided to determine the effectiveness of the sealing engagement of the insert sleeve within the housing.
REFERENCES:
patent: 2028316 (1936-01-01), Brunner
patent: 2424727 (1947-07-01), Wenk
patent: 2635900 (1953-04-01), Mayo et al.
patent: 3472062 (1969-10-01), Owen
patent: 3877730 (1975-04-01), Frantz
patent: 4029345 (1977-06-01), Romanelli
patent: 4474381 (1984-10-01), Wilkins et al.
patent: 4648626 (1987-03-01), Vinciguerra et al.
patent: 4695080 (1987-09-01), Oetiker
Hopson William
Taylor William M.
Arola Dave W.
Cameron Iron Works U.S.A., Inc.
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