Back-off tool

Details Back-off tool Back-off tool

1983-06-22

1985-08-27

Novosad, Stephen J.

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

166299, 166 63, 166301, 166 55, E21B 2300

Patent

active

045372551

ABSTRACT:
A back-off tool comprising an explosive contained in a tubular housing which will disintegrate into fine particles upon detonation of the explosive. The explosive may be in the form of pellets so as to have the capability to vary the amount of explosive force by employing different diameter pellets and different numbers of pellets in the housing. A pressure compensation arrangement may be employed.

REFERENCES:
patent: 2745345 (1956-05-01), Sweetman
patent: 2749840 (1956-06-01), Babcock
patent: 2866508 (1958-12-01), Church
patent: 2873675 (1959-02-01), Lebourg
patent: 2884065 (1959-04-01), Bender
patent: 2911909 (1959-11-01), Fuchs
patent: 3174545 (1965-03-01), Mohaupt
patent: 3640222 (1972-02-01), Graham
patent: 4007790 (1977-02-01), Henning
patent: 4007790 (1977-02-01), Henning
patent: 4266613 (1981-05-01), Boop
patent: 4290486 (1981-09-01), Regalbuto
patent: 4298063 (1981-11-01), Regalbuto et al.
patent: 4345646 (1982-08-01), Terrell
patent: 4352397 (1982-10-01), Christopher
Condensed Chemical Dictionary, Eighth Ed., p. 426, 1971, revised _by Gessner G. Hawley.

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