Liner and improved shaped charge especially for use in a well pi

Details Liner and improved shaped charge especially for use in a well pi Liner and improved shaped charge especially for use in a well pi

1995-01-27

1996-04-23

Nelson, Peter A.

Ammunition and explosives

Blasting

Detonation wave modifying

B32B 100

Patent

active

055093566

ABSTRACT:
A liner (30) for a shaped charge (10) has a hemispherical apex and a skirt portion (38) which terminates in a circular skirt edge (40) having a skirt edge diameter (D). The apex (36) has a radius of curvature which is less than the skirt edge diameter (D) and the thickness (Tac) of the liner at the center of the apex (36) is greater than the thickness (Ts) of the liner at the skirt edge (40), with the thickness tapering between the apex and the skirt edge in a smooth, curvilinear transition. The liner (30) may be employed in a shaped charge (10) which includes a shaped explosive (26) which has been compressed to at least 95% of its theoretical maximum density and is contained in a housing (12) and cover (20) made of a pulverable material such as a ceramic. A chamber (22) is provided in the base of the housing (12) to receive a pre-compressed initiation pellet (24) and the housing has a slot (42) formed in its base (14) to receive and retain therein a linear explosive member in close proximity to the initiation pellet (24) retained within the chamber.

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