Releasable coupling

Details Releasable coupling Releasable coupling

1982-10-20

1986-07-22

Husar, Cornelius J.

Pipe joints or couplings

Frangible element

285 18, 285 39, 285315, 285319, 285306, 137 681, 166318, F16L 3708

Patent

active

046014926

ABSTRACT:
A releasable coupling has opposite ends adpated to be connected into a tool string or tubing string and run downhole into a borehole. A sealing member is passed down through the tubing string and allowed to become seated within the axial passageway of the releasable coupling. Pressure is applied through the axial passageway above the sealing member whereupon the differential in pressure effected across the sealing member is also effected across a slidable piston reciprocatingly received within the releasable coupling. The piston moves into a position which enables a male member to be released and separated from a female member. When the male and female members are released and separated from one another, the lower part of the tubing string is disconnected from the upper part of the tubing string.

REFERENCES:
patent: 2228243 (1939-12-01), Baker
patent: 2839315 (1958-06-01), Arterbury
patent: 3148894 (1964-09-01), Schwab
patent: 3331378 (1967-07-01), Gibbs et al.
patent: 3888306 (1975-06-01), Wetzel
patent: 4066282 (1978-01-01), Vann
patent: 4175778 (1979-11-01), Nunez et al.
patent: 4292988 (1981-10-01), Montgomery
patent: 4449736 (1984-05-01), Blackwell
patent: 4452472 (1984-06-01), Crase

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