Through tubing perforating gun including a plurality of phased capsule charges mounted on a retrievable base strip via a plurality of shatterable support rings
US5095999A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 7, 1990 |
| Grant date | Mar 17, 1992 |
| Priority date | — |
| Expiry date | Aug 7, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/117
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A through-tubing perforating gun includes an angularly shaped base strip having first and second surfaces and including a plurality of recesses in the first surface and a plurality of recesses in the second surface. A plurality of capsule charges are mounted in the plurality of recesses in the first and second surfaces of the base strip and are held in place within the recesses by a plurality of support rings connected to the base strip. The base strip is made of a material which will allow the base strip to withstand detonation of the capsule charges and will not shatter when the charges detonate; however, the support rings are made of a material which will allow the support rings to shatter when the capsule charges detonate. As a result, when the charges detonate, the support rings will shatter into a multitude of pieces allowing the charges to fall to a bottom of the well; however, the base strip will not shatter when the charges detonate and may be retrieved from the borehole for subsequent inspection to determine which charges detonated and which charges did not detonate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.