Locking slip joint and method of use

Details Locking slip joint and method of use Locking slip joint and method of use

1977-12-15

1979-12-11

Arola, Dave W.

Pipe joints or couplings

With assembly means or feature

29428, 277190, 277236, 285 96, 285342, F16L 5500, F16L 1702

Patent

active

041780205

ABSTRACT:
A locking slip joint has primary utility in the making up of a tie-in in pipeline laying and repair operations. In a preferred embodiment the slip joint comprises an inner sleeve telescopically received within an outer sleeve. Means for locking the sleeves together is disposed in an annulus between the sleeves and comprises a seal ring having annular teeth in communication with both sleeves. A pair of opposed tapered annular pistons engage mating recesses in the seal ring and are hydraulically actuated to deform the seal ring outwardly thereby embedding the teeth into both sleeves. The embedment provides an irreversible metal-to-metal seal.

REFERENCES:
patent: 317408 (1885-05-01), Moeser
patent: 3649032 (1972-03-01), Nelson
patent: 3713675 (1973-01-01), White
patent: 3784234 (1974-01-01), Mohr
patent: 3915462 (1975-10-01), Bruns et al.
patent: 3933376 (1976-01-01), Cugini
patent: 4006921 (1977-02-01), Mohr

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