Patent ID: 7698982
Filing Date: 2010-04-20
Classification: E21B,F42B,F42D

Abstract:
1. A method of severing a length of pipe comprising the steps of: providing a tubular barrel space for assembling a column of highly explosive material; providing exploding wire detonators at opposite ends of said tubular barrel space; providing a capacitive firing device for selectively igniting said detonators substantially simultaneously; providing electrical continuity connections between said capacitive firing device and said exploding wire detonators; assembling a column of highly explosive material within said tubular barrel space subsequent to said continuity connections between said capacitive firing device and said detonators; engaging opposite ends of said explosive material column with said exploding wire detonators; applying a resilient compression bias against said explosive material column between said electrically initiated detonators; positioning said tubular barrel within an internal flow bore of a pipe at a predetermined location along a length of said flow bore; and, electrically initiating said detonators.