Oil-Emulsion Water (Milk Emulsion)
Oil-Emulsion Water (Milk Emulsion) : A drilling fluid in which the oil content is usually kept between 3 to 7 percent and seldom over 10 percent (it can be considerably higher). The oil is emulsified into fresh or salt water with a chemical emulsifier. Sometimes CMC, starch, or gum may be added to the fresh-and-salt-water systems. (Bul D11)