Explosive cutting system

Details Explosive cutting system Explosive cutting system

1979-06-29

1983-04-05

Pate, III, William F.

Wells

Processes

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

166 551, 102313, E21B 2902

Patent

active

043788440

ABSTRACT:
Disclosed are method and apparatus for cutting tubular members from the inside by use of an explosive-induced shock wave. In a particular disclosed embodiment, an electric detonator is used to initiate two equal lengths of linear explosives, each of which initiates a non-electric detonator, to provide dual simultaneous detonation of both ends of an elongate high explosive charge distribution. The resulting collision of detonation shock fronts at or near the center of the explosive charge diverts the shock energy 90.degree. into a 360.degree. distribution about the axis of the charge distribution in a plane perpendicular to that axis to provide the energy to cut a tubular member circumscribing the explosive charge.

REFERENCES:
patent: 2831429 (1958-04-01), Moore
patent: 3238871 (1966-03-01), Lang
patent: 4184430 (1980-01-01), Mock
patent: 4290486 (1981-09-01), Regalbuto
Fundamental Demolition Techniques, Paper delivered at meeting of American Ordinance Association, Fall 1967, S. Moses, p. 7.

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