Shaped charge with an integral liner and case

Abstract

An integral shaped charge has a liner portion and a case portion, the liner portion forming a cavity extending from a face to an apex. An explosive is disposed in the chamber.

1 . A shaped charge comprising:
 a liner portion and a case portion formed by one of the group of stamping, drawing and machining, wherein the case portion and the liner portion are a single unitary piece of shaped charge material;   the case portion and the liner portion defining a chamber between the case portion and the liner portion; and   an explosive material disposed within the chamber.   
   
   
       2 . The shaped charge of  claim 1 , wherein the shaped charge material comprises barite. 
   
   
       3 . The shaped charge of  claim 1 , wherein the shaped charge material comprises at least one selected from the group consisting of: a metal, a glass, and a ceramic. 
   
   
       4 . The shaped charge of  claim 1 , wherein the explosive material comprises a first explosive material and a second explosive material, the first and second explosive materials having different explosive characteristics from one another. 
   
   
       5 . The shaped charge of  claim 1 , wherein the shaped charge material includes an explosive material. 
   
   
       6 . The shaped charge of  claim 1 , wherein the liner portion extends from a face of the shaped charge to an apex and comprises at least three distinct radiuses of curvature. 
   
   
       7 - 8 . (canceled) 
   
   
       9 . The shaped charge of  claim 1 , wherein the explosive material comprises a first PBX explosive material and a second PBX explosive materials, the first and the second explosive materials having different explosive characteristics. 
   
   
       10 . The shaped charge of  claim 1 , wherein the explosive material is PBX explosive. 
   
   
       11 . The shaped charge of  claim 1 , wherein a liner insert is disposed in a cavity defined by the liner portion. 
   
   
       12 . The shaped charge of  claim 1 , wherein the liner insert comprises a material selected from a group consisting of a metal, a glass, a ceramic and barite. 
   
   
       13 . The shaped charge of  claim 11 , wherein the liner insert comprises sintered tungsten. 
   
   
       14 . A method for constructing a shaped charge, the method comprising the steps of:
 providing a single unified piece of shaped charge material;   forming the shaped charge material into a shaped charge body comprising a liner portion and a case portion, wherein forming comprises one selected from a group consisting of stamping, drawing, and machining; and   disposing an explosive material in the shaped charge.   
   
   
       15 . The method of  claim 14 , wherein the step of forming comprises drawing the shaped charge material from a face around the case portion to form the liner portion. 
   
   
       16 . The method of  claim 14 , wherein the step of forming includes:
 creating a generally conical shaped liner portion extending from a face to an apex; and   creating a case portion extending down and around from the face proximate to the apex.   
   
   
       17 . The method of  claim 16 , wherein the step of creating the generally conical shaped liner portion precedes the step of creating the case portion. 
   
   
       18 . The method of  claim 16 , wherein the explosive material is disposed with the perforating material before the shaped charge body is formed. 
   
   
       19 . The method of  claim 16 , wherein the explosive material is disposed in a chamber defined by the liner and the case. 
   
   
       20 . The method of  claim 14 , wherein the single unified piece of shaped charge material is provided in a substantially flat planar shape. 
   
   
       21 . The method of  claim 14 , wherein the single unified piece of shaped charge material is provided in a substantially flat planar shape. 
   
   
       22 . A method for constructing a shaped charge for a perforating gun, comprising:
 providing a substantially planar, disk shaped unitary piece of shaped charge material having a face;   forming a conically shaped liner portion extending from the face to an apex, the liner portion having a cavity;   drawing the shaped charge material down from the face and around the liner portion to form a case portion and a chamber between the liner portion and the case portion; and   disposing an explosive material in the chamber.   
   
   
       23 . The method of  claim 22 , wherein the liner portion comprises at least three distinct radiuses of curvature.