Apparatus and method for severing pipe utilizing a multi-point initiation explosive device
US7104326B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2003 |
| Grant date | Sep 12, 2006 |
| Priority date | — |
| Expiry date | Oct 13, 2024 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B29/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system and method for making and using a multi-point initiation explosive device that produces an enhanced pressure wave for severing tubing, pipe or casing in an oil or gas well. At least two opposed initiators initiate a column of explosive material from opposite ends, thereby generating opposing pressure waves propagating toward a midpoint between the initial initiators. A shaped-charge assembly with a liner located at the midpoint initiates immediately prior to the arrival of the opposing pressure waves and forms a fast moving jet to pre-score the target pipe prior to the arrival of the pressure pulse propagating from the initial detonations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.