Fluid loss additives for oil base muds and low fluid loss compositions thereof
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United States of America Patent
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Jan 20, 1987
Issued Date -
N/A
app pub date -
Apr 7, 1986
filing date -
Oct 17, 1984
priority date (Note) -
Expired
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Abstract
A novel ammonium salt of quebracho prepared by reacting quebracho with alkyl quaternary ammonium salts is an effective fluid loss control agent when used in oil base drilling fluids for use in drilling oil and gas wells, especially in water in oil emulsion drilling mud formulations, controlling filtrate loss of the oil-base mud under high temperature and high pressure conditions.
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