Intervening shaped charge liner

Abstract

The present disclosure relates to shaped charge. The shaped charge includes an explosive component having a first density and a first mechanical strength. The shaped charge also includes a liner member having a second density and a second mechanical strength. Further, the shaped charge includes an intervening liner member having a third density and a third mechanical strength. The intervening liner member is disposed between the explosive component and the liner member. The intervening liner member has one or both of: the third density being between the first density and the second density; and the third mechanical strength being between the first mechanical strength and the second mechanical strength.

1 . A shaped charge, comprising:
 an explosive component having a first density and a first mechanical strength;   a liner member having a second density and a second mechanical strength; and   an intervening liner member having a third density and a third mechanical strength, wherein the intervening liner member is disposed between the explosive component and the liner member, wherein one or both of:
 the third density is between the first density and the second density; and 
 the third mechanical strength is between the first mechanical strength and the second mechanical strength. 
   
     
     
         2 . The shaped charge of  claim 1 , wherein the intervening liner member is a thermoplastic material. 
     
     
         3 . The shaped charge of  claim 1 , wherein the intervening liner member is a metal film or sheet. 
     
     
         4 . The shaped charge of  claim 3 , wherein the intervening liner member consists essentially of calcium, aluminum, barium, or beryllium. 
     
     
         5 . The shaped charge of  claim 1 , wherein the intervening liner member is hydrodynamically equivalent to less than or equal to 20 wt % of a total mass of the intervening liner member and the liner member. 
     
     
         6 . The shaped charge of  claim 1 , wherein the intervening liner member is hydrodynamically equivalent to less than or equal to 10 wt % of a total mass of the intervening liner member and the liner member. 
     
     
         7 . The shaped charge of  claim 1 , comprising an additional intervening liner member comprising a fourth density and a fourth mechanical strength, wherein the fourth density is between the first density and the second density, and wherein the fourth mechanical strength is between the first mechanical strength and the second mechanical strength. 
     
     
         8 . The shaped charge of  claim 1 , wherein the third density of the intervening liner member is less than 8 g/cc. 
     
     
         9 . The shaped charge of  claim 1 , wherein the third mechanical strength of the intervening liner member is less than 100 MPa. 
     
     
         10 . A shaped charge, comprising:
 an explosive component having a first density and a first mechanical strength;   a liner member having a second density and a second mechanical strength; and   an intervening liner member comprising a plurality of material layers, wherein each material layer of the plurality of material players comprise a density that is between the first density and the second density, wherein each material layer of the plurality of material players comprise a mechanical strength that is between the first mechanical strength and the mechanical strength, and wherein the intervening liner member is disposed between the explosive component and the liner member.   
     
     
         11 . The shaped charge of  claim 10 , wherein the plurality of material layers are arranged in order of increasing density along a direction from the explosive component to the liner member. 
     
     
         12 . The shaped charge of  claim 10 , wherein the plurality of material layers are arranged in order of increasing mechanical strength along a direction from the explosive component to the liner member. 
     
     
         13 . The shaped charge of  claim 10 , wherein the intervening liner member is a metal film or sheet. 
     
     
         14 . The shaped charge of  claim 10 , wherein the intervening liner member is hydrodynamically equivalent to approximately 10 wt % to 20 wt % of a total mass of the intervening liner member and the liner member. 
     
     
         15 . The shaped charge of  claim 10 , wherein the intervening liner member is a thermoplastic material. 
     
     
         16 . A method, comprising:
 providing an intervening liner member for a shaped charge;   providing a primary liner member; and   assembling the shaped charge such that the intervening liner member is disposed between the primary liner member and an explosive component of the shaped charge.   
     
     
         17 . The method of  claim 16 , wherein the intervening liner member comprises a plurality of layers. 
     
     
         18 . The method of  claim 17 , wherein providing the intervening liner member comprising forming the plurality of layers arranged in order of increasing density. 
     
     
         19 . The method of  claim 17 , wherein providing the intervening liner member comprising forming the plurality of layers arranged in order of increasing mechanical strength. 
     
     
         20 . The method of  claim 16 , wherein a thickness of the intervening liner member is less than a thickness of the primary liner member.