Ammunition and explosives – Blasting – Detonation wave modifying
Patent
1994-12-29
1995-10-24
Nelson, Peter A.
Ammunition and explosives
Blasting
Detonation wave modifying
102310, 102476, 102313, 86 21, 175 46, F42B 102, F42B 300, F42D 108
Patent
active
054600952
ABSTRACT:
The invention is a lid for a shaped charge which enables application of torque to the shaped charge for mounting in an expendable bar carrier borehole penetrating gun assembly. The lid comprises a plurality of flat surfaces facially parallel with the axis of a threaded stud forming part of the lid, the stud engaging mating threads in a hole in the carrier. The flat surfaces are arranged around the circumference of the lid so that a wrench or socket can be used to apply torque to the lid for mounting in the carrier. Each juncture of two contiguous ones of the flat surfaces includes a score line extending substantially perpendicular to the axis of the stud.
In a preferred embodiment of the invention each juncture includes a crimp on part of the juncture on a side of the score line opposite to the stud, to retain the lid on the charge.
The invention is also an apparatus for simultaneously torquing a plurality of shaped charged in a bar carrier. Each of the shaped charges comprises the charge lid of the invention. The apparatus includes a plurality of wrench sockets, corresponding final drives coupled to the sockets, an intermediate drive coupled to all of the final drives, and a motor to turn the intermediate drive, all mounted in a frame. The final drives are coupled to the intermediate drive to cause all the sockets to rotate in the same direction. Positioning the frame to enable the sockets each to engage a shaped charge will cause all the charges to be torqued simultaneously.
REFERENCES:
patent: 2043340 (1936-06-01), Tilbury et al.
patent: 2839997 (1958-06-01), Church et al.
patent: 4655138 (1987-04-01), Regalbuto et al.
patent: 4889183 (1989-12-01), Sommers et al.
patent: 5007486 (1991-04-01), Ricles
patent: 5095999 (1992-03-01), Markel
Kissell Girven R.
Slagle Terry L.
Fagin Richard A.
Nelson Peter A.
Western Atlas International Inc.
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