Perforation Gun System for Sealing Penetration Holes

Abstract

A perforation gun includes an external gun barrel in the interior of which perforators are located which can be ignited via a fuse extending through the gun barrel and which, after ignition, pierce the gun barrel with perforation holes. A sliding tube or a swellable two-component foam is provided which automatically closes the perforation holes. The swellable two-component foam can be provided in a cartridge located inside the gun barrel and can be broken up by the ignited fuse, thereby allowing foam to escape from the cartridges, allowing it to swell and obliterate the perforation holes. The sliding tube can be displaced after perforation by an adjusting device by at least the diameter of the perforation hole, the sliding tube being located coaxially between the perforators and the gun barrel.

1 . A perforation gun having an outer gun barrel, arranged in the interior of which there are perforators that can be ignited by way of a fuse leading through the gun barrel and after ignition pierce the gun barrel at penetration holes, wherein means are provided for the automatic closure of the penetration holes, characterised in that the means for the automatic closure comprise cartridges with a swellable two-component foam and these cartridges are arranged in the gun barrel and can be broken up by means of the ignited fuse, as a result of which foam emerges out of the cartridges, swells up and blocks the penetration holes. 
   
   
       2 . A perforation gun according to  claim 1 , characterised in that a cartridge is arranged next to each perforator.