Well tool locking system for staggered bore

Details Well tool locking system for staggered bore Well tool locking system for staggered bore

1989-02-28

1990-10-16

Neuder, William P.

Wells

Expansible anchor or casing

Expansible means translated by wedge or cam

E21B 2300

Patent

active

049628135

ABSTRACT:
A well tool locking system adapted for releasably locking a lock mandrel and surface-controlled subsurface safety valve in a staggered well bore is disclosed. The subject locking system comprises a collapsible, slidably engaged no-go ring and locating dogs that are operatively coupled to a locking sleeve to pre-prop locking keys in the annular recesses of a landing nipple prior to applying control line pressure to the safety valve. The subject locking system is designed to lock in the direction of flow, does not require the use of shear pins, and will not release from the running tool until the safety valve is activated and the lock mandrel locking keys are fully engaged with the landing nipple.

REFERENCES:
patent: 3789925 (1974-02-01), Brown
patent: 4018275 (1977-04-01), Gaut
patent: 4479539 (1984-10-01), Tamplen et al.
patent: 4545434 (1985-10-01), Higgins
patent: 4745974 (1988-05-01), Higgins
patent: 4823872 (1989-04-01), Hopmann
Otis SafetySet Lock Mandrel System, published Jan. 5, 1987.

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