Locking slip joint

Details Locking slip joint Locking slip joint

F - Mech Eng,Light,Heat,Weapons

16

L

285/47.2

F16L 55/00 (2006.01) F16L 17/02 (2006.01) F16L 37/00 (2006.01)

Patent

CA 1082245

LOCKING SLIP JOINT ABSTRACT OF THE DISCLOSURE 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.

317424

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