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Journal of Petroleum and Gas Engineering
Conventional drilling fluids such as diesel and mineral oil have posed some environmental and health challenges in their drilling applications but the introduction of synthetic-base fluids over the past two decades has considerably reduced such challenges. In some cases, a bottom hole temperature above 300°F (150°C) can cause significant instability in the rheological properties of these drilling fluids. Vegetable oils or pseudo oils are known to be environmentally friendly drilling fluids, butdoi:10.5897/jpge2015.0215 fatcat:kxzziiqlgbbvtbikns7usc5qkq