INVERT EMULSION DRILLING FLUIDS FOR FLAT RHEOLOGY DRILLING

摘要

An invert emulsion drilling fluid, and a method of drilling with such fluid, having substantially flat or relatively controlled rheology, as demonstrated by the drilling fluid exhibiting little change in its yield point and gel strength across a temperature range of from about 40°F to about 180°F, and effected with addition of a fatty dimer diamine additive together with an acid and without the addition of organophilic clays or lignites.