Hydraulically actuated lock pin for well pipe hanger

Details Hydraulically actuated lock pin for well pipe hanger Hydraulically actuated lock pin for well pipe hanger

1987-05-07

1988-09-13

Massie, IV, Jerome W.

Wells

Processes

Placing or shifting well part

166 85, 285 18, 285 39, 2851332, 285140, E21B 2300, F16L 3500

Patent

active

047702508

ABSTRACT:
A lock pin for locking a pipe hanger assembly in a wellhead is hydraulically actuated. The lock pin extends through a radial passage provided in the wellhead. The lock pin moves linearly to an inner position to engage the hanger assembly. A hydraulic piston is coupled to the exterior of the wellhead for providing an inward force to the lock pin. A retainer is mounted to the wellhead by threads. While the lock pin is held in the inner position under hydraulic pressure, the retainer is rotated inward against a shoulder provided on the lock pin to hold the lock pin in the inner engaged position. The hydraulic pressure can then be removed.

REFERENCES:
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patent: 3248132 (1966-04-01), Pierce, Jr.
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patent: 3821984 (1974-07-01), Lee
patent: 4214778 (1980-07-01), Diehl
patent: 4307783 (1981-12-01), Lanmon, III
patent: 4650226 (1987-03-01), Babbitt et al.
patent: 4653778 (1987-03-01), Alandy

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