Wells – Means for perforating – weakening – bending or separating pipe... – Perforating or splitting cutter
Patent
1985-09-26
1986-11-25
Novosad, Stephen J.
Wells
Means for perforating, weakening, bending or separating pipe...
Perforating or splitting cutter
89 115, 102531, 166 63, E21B 43112
Patent
active
046243070
ABSTRACT:
An explosive perforating tool has an elongated barrel having a piston disposed substantially within. A radial passage extends from the outer surface of the barrel into the longitudinal cavity, thereby allowing the piston to be explosively driven from the tool through the radial passage. The piston has a longitudinal opening therethrough. When an explosive charge is set off increasing the pressure of a lubricating fluid within the longitudinal cavity, pressure is uniformly built up all around the piston and is the primary mode of force propelling the piston against the tubing. Vent openings are provided in the elongated chamber to allow the lubricating fluid to escape, thereby regulating the rate of pressure dissipation within the cavity to control the force with which the piston is propelled against the tubing. Spacers of varying size can be attached to the barrel to allow the tool to be used in different sizes of tubing.
REFERENCES:
patent: 2185303 (1940-01-01), Kinley
patent: 2336812 (1943-12-01), Spencer
patent: 2381081 (1945-08-01), Schlumberger
patent: 2426106 (1947-08-01), Kinley
patent: 3176770 (1965-04-01), Ehlert
patent: 3199287 (1965-08-01), Kinley
patent: 3199593 (1965-08-01), Kinley
patent: 3366179 (1968-01-01), Kinley et al.
patent: 3411597 (1968-11-01), Kinley et al.
patent: 3447604 (1969-06-01), Kinley et al.
J. C. Kinley Company
Neuder William P.
Novosad Stephen J.
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