Drilling fluid, apparatus, and method
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United States of America Patent
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Mar 28, 2006
Issued Date -
N/A
app pub date -
Jan 15, 2003
filing date -
Aug 14, 2000
priority date (Note) -
Expired
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Abstract
Disclosed are drilling fluids that include carboxyalkylated corn hulls in an amount effective to inhibit fluid loss from a wellbore formation. The carboxyalkylated corn hulls are heat stable and surprisingly effective at inhibiting fluid loss. Also disclosed are a drilling apparatus and a drilling process.
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