Method and apparatus to remove a downhole drill collar from a well bore
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United States of America Patent
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Aug 16, 2011
Grant Date -
Sep 2, 2010
app pub date -
Apr 27, 2010
filing date -
Mar 26, 2008
priority date (Note) -
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Abstract
A method of severing a drill string or other tubular string that includes lowering a torch into the drill string, positioning the torch at a joint in the drill string, such that the joint may have a pin component engaged with a box component, igniting the torch to produce cutting fluids, and directing the cutting fluids into the joint in a direction that is along a length of the drill string to cut the joint.
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