Snap-on Liner Retention Device

Abstract

A shaped charge retainer ring for use in containing the liner of a shaped charge and the explosive material.

1 . A shaped charge apparatus comprising:
 a shaped charge case with an axis, an inner surface, an outer surface, and a top surface; and at least one circumferential retaining means for retaining a ring on the outer surface;   a liner with an inner surface and an outer surface;   an explosive material located between the outer surface of the liner and the inner surface of the shaped charge case;   a L-shaped inner retainer ring attached to the top surface of the shaped charge case and with an inner radial surface, an outer radial surface, a lower axial surface, and an upper axial surface, wherein the lower axial surface is adjacent to the top surface of the shaped charge case and the outer radial surface is adjacent to the inner surface of the shaped charge case; and   a L-shaped outer retainer ring engaging with the shaped charge case and having an upper axial surface a lower axial surface, an inner radial surface, and an outer radial surface, wherein the inner radial surface includes at least one other retaining means that is interfaced with the shaped charge case outer surface circumferential retaining means,   wherein the inner retaining ring and the outer retainer ring are separate rings or are integrally formed into a single retainer; and   wherein the liner is restrained axially by the inner retainer ring and the outer retainer ring.   
     
     
         2 . The apparatus of  claim 1 , wherein the at least one retaining means on the outside surface of the shaped charge case is a circumferential groove. 
     
     
         3 . The apparatus of  claim 2 , wherein the at least one retaining means is a plurality of circumferential grooves. 
     
     
         4 . The apparatus of  claim 1 , wherein the retaining means is a thread. 
     
     
         5 . The apparatus of  claim 4 , wherein the thread is a buttress thread. 
     
     
         6 . The apparatus of  claim 1 , wherein the retaining means is a plurality of ridges. 
     
     
         7 . The apparatus of  claim 1 , wherein retaining means is a plurality of detents. 
     
     
         8 . The apparatus of  claim 1 , wherein retaining means is a lip.