Internal nonrotating tie-back connector

Details Internal nonrotating tie-back connector Internal nonrotating tie-back connector

1986-08-18

1987-07-21

Leppink, James A.

Wells

Submerged well

Connection or disconnection of submerged members remotely...

166217, 166237, 166359, 285 18, 285141, 285392, E21B 33038

Patent

active

046811664

ABSTRACT:
A tie-back connector for a subsea well allows the tie-back connection to be made without rotation. A set of threads is located on an inner wall of the outer conduit into which the tie-back connection is to be made. An annular latch is carried by the inner conduit which is being tied back from the surface to the outer conduit. The latch has threads on its exterior which ratchet past the threads on the inner wall as the inner conduit is lowered into the outer conduit. After the threads of the latch are ratcheted fully into alignment with the threads in the outer conduit, the inner conduit is pulled upwardly relative to the latch to secure it in tension. A retainer is actuated when the inner conduit is in the upper position to prevent the inner conduit from moving downwardly again relative to the latch. The inner conduit can be removed by rotation relative to the outer conduit.

REFERENCES:
patent: 2737247 (1956-03-01), Baker
patent: 2849245 (1958-08-01), Baker
patent: 3420308 (1969-01-01), Putch
patent: 3741589 (1973-06-01), Herd, et al.
patent: 3893717 (1975-07-01), Nelson
patent: 4167970 (1979-09-01), Cowan
patent: 4363558 (1982-12-01), Ellis
patent: 4391326 (1983-07-01), Greenlee
patent: 4465134 (1984-08-01), Watkins
patent: 4513822 (1985-04-01), Gilbert
patent: 4528738 (1985-07-01), Galle, Jr.
patent: 4607865 (1986-08-01), Hughes

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