Well bore apparatus adapted for being releasably coupled to susp

Details Well bore apparatus adapted for being releasably coupled to susp Well bore apparatus adapted for being releasably coupled to susp

1979-01-15

1980-12-09

Leppink, James A.

Wells

Means for cutting cable or rope below ground

102 212, E21B 2902

Patent

active

042379725

ABSTRACT:
In the several representative embodiments of well bore apparatus disclosed herein adapted for releasable connection to a suspension cable, a cable-cutting member is arranged within an upper portion of the well bore apparatus for parting the lower end portion of the cable connected to the apparatus. In the disclosed embodiments of the invention, the cutting member is retained in an inactive position and chemically-degradable securing means are cooperatively arranged to fail only upon the elapse of a prolonged time interval so as to actuate the cable-cutting member should the apparatus have become stuck in a well bore. Provisions are also made for replacing the securing means upon return of the apparatus to the surface before the expiration of the predetermined time interval.

REFERENCES:
patent: 2794619 (1957-06-01), Lawrence et al.
patent: 2825536 (1958-05-01), Kenneday et al.
patent: 2965031 (1960-12-01), Johns
patent: 3010515 (1961-11-01), Harrison et al.
patent: 3036522 (1962-05-01), Lindsey
patent: 3073388 (1963-01-01), Chenault

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