Drilling fluids
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United States of America Patent
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Aug 12, 1986
Grant Date -
N/A
app pub date -
Apr 2, 1985
filing date -
Apr 2, 1984
priority date (Note) -
Expired
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Abstract
A drilling fluid is described, consisting essentially of sodium carboxymethyl cellulose, bentonite, water, and at least one compound selected from 2-mercaptobenzimidazole compounds, 2-mercaptobenzothiazole compounds, 2-mercaptothiazoline and 2-thioimidazolidone.
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