Drill collar severing tool
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United States of America Patent
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Jan 27, 2015
Grant Date -
Nov 20, 2014
app pub date -
May 19, 2014
filing date -
May 20, 2013
priority date (Note) -
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Abstract
A pipe severing tool is arranged to align a plurality of high explosive pellets along a unitizing central tube that is selectively separable from a tubular external housing. The pellets are loaded serially in a column 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.
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