Wells – Submerged well – Connection or disconnection of submerged members remotely...
Patent
1989-06-28
1990-11-13
Kisliuk, Bruce M.
Wells
Submerged well
Connection or disconnection of submerged members remotely...
166208, 285 86, 285141, E21B 33043
Patent
active
049695193
ABSTRACT:
An improved subsea tubing hanger having a body with an external shoulder for landing on a seat within a subsea wellhead housing, locking means carried by the hanger to engage the housing to lock the hanger in landed position, which locking means includes a locking element, actuator for setting the locking element and a securing pin for holding the actuating means in its locked position but being releasable responsive to sufficient upward force to sever the securing pin. The improved running tool includes a body with hydraulic actuated latching means for engaging the tubing hanger and which maintains its engagement with the tubing hanger even when hydraulic pressure is lost. The actuator includes an area exposed to hydrostatic riser pressure with sufficient area to retain the actuator in latched position even through the remainder of the actuating means is exposed to well bore hydrostatic head urging it out of latched position.
REFERENCES:
patent: 3543847 (1970-12-01), Haeber
patent: 3693714 (1972-09-01), Baugh
patent: 4067062 (1978-01-01), Baugh
patent: 4067388 (1978-01-01), Mouret et al.
patent: 4262748 (1981-04-01), Kirkland
patent: 4712621 (1987-12-01), Wightman et al.
patent: 4712621 (1987-12-01), Wightman et al.
patent: 4736799 (1988-04-01), Ahlstone
Cooper Industries Inc.
Kisliuk Bruce M.
Manuel George
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