Drilling Fluid Classifications Used In Drilling Industry: "Nowadays drilling fluid technology has been improving over period of time to suit with drilling applications in many areas in the world. The use of water as a drilling fluid dates back to the third century. Since then, many other types of fluid have been used, including air, natural gas, water misted in air, foams, and a variety of natural and synthetic oils. This article will give an overall basic knowledge of drilling fluid classifications."
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