Box by Pin Perforating Gun System and Methods

Abstract

A method and system for a perforating gun having a box by pin perforating gun system using swaged down gun bodies. The box by pin perforating gun system may include a removable cartridge to hold a detonator with a switch and an insulated charge holder as an electrical feed-through.

What is claimed is: 
     
         1 . A method of manufacturing a perforating gun body comprising:
 receiving a metallic tube of substantially constant diameter from a first end to a second end;   forming external threads in the first end;   forming internal threads in the second end; and   wherein the internal threads are adapted to engage the external threads.   
     
     
         2 . The method of  claim 1  further comprising:
 swaging down the diameter of the first end before forming the external threads. 
 
     
     
         3 . The method of  claim 1  further comprising:
 swaging up the diameter of the second end before forming the internal threads. 
 
     
     
         4 . The method of  claim 1  wherein the internal and external threads are self-sealing threads. 
     
     
         5 . A method of manufacturing a perforating gun body comprising:
 receiving a metallic tube of substantially constant diameter from a first end to a second end;   affixing a fitting to the first end;   forming external threads in the fitting;   forming internal threads in the second end; and   wherein the internal threads are adapted to engage the external threads.   
     
     
         6 . The method of  claim 5  wherein the fitting is affixed to the first end by welding. 
     
     
         7 . The method of  claim 6  wherein the fitting is affixed to the first end by friction welding.