Tubing hanger and running tool with preloaded lockdown

Details Tubing hanger and running tool with preloaded lockdown Tubing hanger and running tool with preloaded lockdown

1991-06-27

1992-09-08

Bui, Thuy M.

Wells

Submerged well

Connection or disconnection of submerged members remotely...

166 775, E21B 2300

Patent

active

051450062

ABSTRACT:
An improved subsea tubing hanger having a body with an external shoulder for landing on a seat within a subsea wellhead housing, locking ring carried on the hanger to engage an interior recess of the wellhead housing, with an actuator ring for setting the locking ring. A preloading mechanism includes an extendible ring cooperating with the locking ring to prevent any movement of the tubing hanger when engaged and operable by torque supplied by the running tool. The improved tubing hanger running tool includes a body secured to the tubing hanger by conventional latching ring with a rotatable outer sleeve having an interior helical groove. A piston positioned on the running tool body and operated by hydraulic fluid pressure has an exterior pin which coacts with the helical groove to provide torque to the actuating ring and preloading ring of the tubing hanger.

REFERENCES:
patent: 3693714 (1972-09-01), Baugh
patent: 4067062 (1978-01-01), Baugh
patent: 4067388 (1978-01-01), Mouret et al.
patent: 4474236 (1984-10-01), Kellett
patent: 4478287 (1984-10-01), Hynes et al.
patent: 4554976 (1985-11-01), Hynes et al.

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