Method for actuating a tool in a well at a given depth and tool

Details Method for actuating a tool in a well at a given depth and tool Method for actuating a tool in a well at a given depth and tool

1984-12-05

1987-02-03

Novosad, Stephen J.

Wells

Processes

With indicating, testing, measuring or locating

166 64, 166162, 166215, 166376, 166382, E21B 2300, E21B 33132

Patent

active

046403540

ABSTRACT:
A downhole tool is actuated at chosen well depth by selection of a control element that melts at the chosen depth well temperature. In one form of tool, a fusible pin melts to release spring-loaded jaws which move against an expansion cone to anchor the tool in the well. In another form, a fusible receptacle cover melts to release a quantity of dense fluid under action of gravity. Suitable control elements are formed of bismuth, with lead and zinc.

REFERENCES:
patent: 1030084 (1912-06-01), Guiberson, Jr.
patent: 1774911 (1930-09-01), Abercrombie
patent: 3057405 (1962-10-01), Mallinger
patent: 3090441 (1963-05-01), Smink et al.
patent: 3187813 (1965-06-01), Green, Jr.
patent: 3461960 (1969-08-01), Wilson
patent: 4149592 (1979-04-01), Burton et al.
patent: 4390291 (1983-06-01), Gaven, Jr. et al.
patent: 4523640 (1985-06-01), Wilson et al.

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