Subsea latch tool for connecting subsea components

摘要

A subsea latch tool has a latch tool body with an outer surface, a lock piston slidably mounted over the outer surface of the latch tool body and movable between an extended position and a retracted position, and a lock ring extending around the outer surface of the latch tool body. The lock piston has a wedge surface at an end thereof. The wedge surface of the lock piston is interposed between the outer surface of the latch tool body and an inner surface of the lock ring. The lock piston is movable from the retracted position to the extended position so as to expand an outer diameter of the lock ring.

主权项

1. A subsea latch tool comprising:
a latch tool body having an outer surface; a first lock piston slidably mounted over said outer surface of said latch tool body, said first lock piston movable between an extended position and a retracted position, said first lock piston having a wedge surface at an end thereof; a lock ring extending around said outer surface of said latch tool body, said wedge surface of said first lock piston interposed between said outer surface of said latch tool body and an inner surface of said lock ring, said first lock piston movable from said retracted position to said extended position so as to expand an outer diameter of said lock ring; a first fluid channel extending through said latch tool body so as to open to said end of said first lock piston, said first fluid channel suitable for passing a fluid so as to move said first lock piston from said retracted position to said extended position, said latch tool body having a shoulder formed at said outer surface, said first lock piston having an inner surface; a second fluid channel extending through said latch tool body so as to open said inner surface of said first lock piston, said second fluid channel suitable for passing the fluid so as to move the first lock piston from said extended position to said retracted position; a second lock piston slidably positioned over said outer surface of said latch tool body, said second lock piston positioned within said inner surface of said first lock piston, said second lock piston movable between a first position adjacent said shoulder of said latch tool body and a second position adjacent a shoulder at said inner surface of said first lock piston; a third fluid channel extending through said latch tool body so as to open toward said inner surface of said first lock piston and adjacent said shoulder of said latch tool body, said third fluid channel suitable for passing the fluid so as to move second lock piston toward said shoulder at said inner surface of said first lock piston; and a fourth fluid channel extending through said latch tool body so as to open at said outer surface of said latch tool body and toward said inner surface of said first lock piston, said fourth fluid channel suitable for passing a fluid so as to test that said first lock piston is in a fully extended position.