Wells – With electrical means
Patent
1978-12-15
1981-06-30
Pate, III, William F.
Wells
With electrical means
166 63, 285 33, 285306, 285DIG21, 285DIG23, 294 8617, 403 2, 403 15, 403 31, 403 32, E21B 4700
Patent
active
042757860
ABSTRACT:
In the several representative embodiments of selectively-operable well bore apparatus disclosed herein for dependently coupling a well tool to a suspension cable, a collapsible assembly of two or more retaining members is arranged within an enclosed chamber and operatively positioned for normally retaining upper and lower tool-support members in a position where they are tandemly coupled or interconnected. In each of the several embodiments of the invention disclosed herein, electrically-responsive securing means normally maintaining the collapsible assembly in its initial position are cooperatively arranged to be selectively failed so as to allow collapse of the retaining assembly should it become necessary to separate the cable from the well tool while it is in a well bore. Provisions are also made for admitting well bore fluids into the enclosed chamber upon collapse of the retaining assembly so as to assure release of the cable even under extreme well bore pressures.
REFERENCES:
patent: 2621895 (1952-12-01), Toelke
patent: 3253653 (1966-05-01), Layre
patent: 3327784 (1967-06-01), Pardue
patent: 3373817 (1968-03-01), Cubberly, Jr. et al.
patent: 3517740 (1970-06-01), Johnson
patent: 3782838 (1974-01-01), Tirapolsky
Pate III William F.
Schlumberger Technology Corporation
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