Patent ID: 7441601
Filing Date: 2008-10-28
Classification: E21B

Abstract:
1. A perforation gun assembly comprising: an outer gun barrel; an upper endplate connected to one end of said outer gun barrel; a lower endplate connected to an end of said outer gun barrel opposite said upper endplate; a mounting plate immovably mounted inside said outer gun barrel between said upper endplate and said lower endplate; a charge mount immovably mounted to said mounting plate inside the outer gun barrel between said upper endplate and said mounting plate, said charge mount having a plurality of explosive charge receiving areas; an inner sleeve slidably mounted inside said outer gun barrel, said inner sleeve being geometrically similar to said outer gun barrel, said inner sleeve having a plurality of holes, each hole being aligned with a corresponding explosive charge receiving area; a guideplate slidably mounted inside said outer gun barrel between said mounting plate and said lower endplate, said guideplate affixed to said inner sleeve, and said guideplate being the male/female counterpart of said lower endplate; and a stress failing connector holding said inner sleeve and said guideplate in place against or near said upper endplate.