Low toxicity oil-based drilling fluid

Details Low toxicity oil-based drilling fluid Low toxicity oil-based drilling fluid

C - Chemistry, Metallurgy

09

K

166/10, 31/13

C09K 8/36 (2006.01) C09K 8/26 (2006.01)

Patent

CA 1218519

Abstract of the Disclosure Disclosed is a low toxicity oil for use in drilling fluids. The oil consists essentially of branched- and cyclic- paraffins having 11 to 17 carbon atoms per molecule and further having a low aromatic content of less than about 1% and a low normal-paraffin content of less than about 5%. The low polynuclear aromatic oil is useful in both oil-based and water- based drilling mud, particularly where low toxicity and lack of water sheen are important such as in offshore drilling environments. The oil also has the advantage of being non- fluorescent so that it does not mask UV fluorescence of forma- tion crudes produced from the drill cuttings in wildcatting operations.

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