Drilling fluid composition and process for the filtrate reduction of drilling fluid compositions containing mixed metal hydroxides
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United States of America Patent
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Apr 2, 1996
Grant Date -
N/A
app pub date -
Nov 12, 1993
filing date -
Dec 17, 1991
priority date (Note) -
Expired
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Abstract
In order to reduce the filtrate of aqueous drilling fluid compositions based on clay minerals containing mixed metal hydroxides, a polysaccharide that is partially etherified with hydroxyethyl and/or hydroxypropyl groups is used as the filtrate-reducing agent.
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