High Energy Severing Tool With Pressure Balanced Explosives

摘要

A high energy pipe severing tool is arranged to align a plurality of pressure balanced explosive pellets along a unitizing central tube that is selectively separable from a tubular external housing. The explosive pellets are loaded serially in a column and in full view along the entire column as a final charging task. Detonation boosters are pre-positioned and connected to detonation cord for simultaneous detonation at opposite ends of the explosive column. Devoid of high explosive pellets during transport, the assembly may be transported with all boosters and detonation cord connected.

主权项

1. An apparatus for severing a length of pipe comprising:
a tubular housing having an internal bore and a plurality of bi-directional boosters; one or more vents in said tubular housing to substantially equalize fluid pressure within said internal bore with fluid pressure outside of said tubular housing; a first detonation cord having a first length between a first bi-directional booster and a second bi-directional booster of said plurality of bi-directional boosters; a second detonation cord having a first length between a third bi-directional booster and a fourth bidirectional booster of said plurality of bi-directional boosters; a main load explosive material in said tubular housing located between said second bi-directional booster and said fourth bi-directional booster of said plurality of bi-directional boosters; a fluid impermeable material mixed with said main load explosive material; and an initiating booster explosive for simultaneously initiating said first bi-directional booster and said third bi-directional booster of said plurality of-bidirectional boosters.