Spotting fluid for differential sticking
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United States of America Patent
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Jan 10, 2006
Issued Date -
N/A
app pub date -
Oct 8, 2003
filing date -
Jan 10, 2001
priority date (Note) -
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Abstract
A new composition for a spotting fluid and a method of using such spotting fluid for freeing differential stuck pipe in a subterranean well drilling operation is disclosed. The composition comprises an invert water-in-oil emulsion comprising iso-butyl oleate as its external phase and glycerin as the internal phase. In an alterative embodiment, calcium chloride and water may be substituted for glycerin.
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