Organophilic clay compositions
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United States of America Patent
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-
Oct 2, 1990
Issued Date -
N/A
app pub date -
May 22, 1989
filing date -
Jul 21, 1986
priority date (Note) -
Expired
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Abstract
Organophilic clays which are effective fluid loss control additives for oil base well-working fluids are prepared from a swelling smectite clay and one or more phosphatides. Preferred phosphatides are phosphoglycerides obtained from vegetable oils, most preferably commercial lecithin such as soybean lecithin. The organophilic clays may also contain quaternary ammonium compounds.
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