| http://www.w3.org/ns/prov#value | - Oil-based drilling fluids can be comprised of oils, including for example, diesel, poly alpha olefins, mineral oils, propylene glycol, methyl glycoside, modified esters and ethers, and the like and mixtures thereof, and invert emulsions of oil in which water is dispersed in an oil-based mediuim Oil based drilling fluids can be comprised entirely of oil, or more commonly, may contain water ranging
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