Well casing hanger and packoff running and retrieval tool

Details Well casing hanger and packoff running and retrieval tool Well casing hanger and packoff running and retrieval tool

1991-04-10

1992-04-21

Britts, Ramon S.

Wells

Submerged well

Connection or disconnection of submerged members remotely...

166208, 285 86, 285141, E21B 33043

Patent

active

051058880

ABSTRACT:
A running tool for lowering, landing and setting a well structure, such as casing hanger and a packoff has an elongated tubular body in which are mounted a plurality of locking dogs that releasably lock a casing hanger to the tool, a plurality of packoff running pins for releasably locking a packoff to the tool, and a plurality of packoff retrieval pins to engage a packoff in a wellhead housing and secure it to the tool for retrieval from the housing. The locking dogs are cammed radially from the tool body into their hanger engaging position by an actuator sleeve, and the running pins and retrieval pins are spring-biased in a radial direction towards their packoff engaging positions and releasably held in their retracted positions by retraction shafts in the tool body. The running tool can be used to (1) run, land and set both a casing hanger and it packoff in a subsea wellhead housing during a single trip to the wellhead and perform a blowout preventer test, (2) run, land and set the hanger and the packoff individually by separate trip, and (3) retrieve the packoff from the wellhead by a single trip.

REFERENCES:
patent: 3688841 (1972-09-01), Baugh
patent: 3837684 (1974-09-01), Hynes
patent: 4880061 (1989-11-01), Ahlstone
patent: 4881784 (1989-03-01), Theiss
patent: 4969516 (1990-11-01), Henderson et al.
patent: 4969519 (1990-11-01), Kelly
patent: 5044442 (1991-09-01), Nobileau

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