Environmentally friendly water based drilling fluids

摘要

An oil-in-water emulsion composition is disclosed which comprises a mixture of brine and;PP(A) at least one natural oil or synthetic triglyceride of the formula ##STR1## wherein R. sup.1, R.sup.2 and R.sup.3 are independently saturated or unsaturated aliphatic groups that contain from about 7 to about 23 carbon atoms; PP(B) at least one alcohol, R.sup.4 OH wherein R.sup.4 is an aliphatic group containing from 1 up to about 18 carbon atoms;P P(C) at least one emulsifier; andPP(D) at least one sulfurized composition wherein (B), (C) and (D) are soluble and reside within (A).