Patent ID: 9145763
Filing Date: 2015-09-29
Classification: E21B

Abstract:
1. A perforation gun, comprising: an outer gun body assembly having a first straight steel pipe with internal female threads at each end, a plurality of external recessed areas, and an orientation slot extending inward from one end of said first straight steel pipe; a carrier tube assembly having a linear charge tube which has an external surface, a first collar having an external alignment pin dimensioned to slide into said orientation slot, said first collar fits over one end of said charge tube into an installed position radially outward of said external surface, a second collar that fits over the opposite end of said charge tube, a plurality of shaped charge saddle slots through said charge tube, and a plurality of shaped charge body apertures through said charge tube, wherein said plurality of shaped charge saddle slots and said plurality of shaped charge body apertures form a plurality of shaped charge holders, and wherein said charge tube is a length of a second straight steel pipe slightly shorter than said outer gun body assembly; and a plurality of shaped charges, each having a shaped charge saddle, each having a charge base, and each of which is located in an associated shaped charge holder of said plurality of shaped charge holders; wherein said carrier tube assembly is inserted into said outer gun body assembly such that said alignment pin slides into said orientation slot so as to control the orientation of said plurality of shaped charges with respect to said external recessed areas; and wherein said first collar is locked into position relative to said charge tube.