Lubricants for drilling mud containing silicic acid

Details Lubricants for drilling mud containing silicic acid Lubricants for drilling mud containing silicic acid

C - Chemistry, Metallurgy

09

K

C09K 8/22 (2006.01) C09K 8/16 (2006.01)

Patent

CA 2487951

A lubricant for use in silicic acid muds and other drilling fluids comprising silicate or silica species is disclosed. The lubricant significantly improves the lubricity of the fluid. A method of drilling a wellbore in a subterranean formation employing the lubricant is also disclosed. A preferred lubricant of the invention comprises about 80 volume percent 2-octyldodecanol and about 20 volume percent alkylglucoside. The alkylglucoside is preferably comprised of 2- ethylhexylglucoside or a mixture of alkylglucosides having more than about 10 carbon atoms in the alkyl chain.

L'invention concerne un lubrifiant pouvant être utilisé dans des boues à base d'acide silicique et dans d'autres fluides de forage comprenant des espèces de silicate ou de silice. Le lubrifiant décrit dans cette invention permet d'améliorer considérablement le pouvoir lubrifiant du fluide. L'invention concerne également un procédé permettant de forer un puits de forage dans une formation souterraine au moyen du lubrifiant susmentionné. Un lubrifiant privilégié dans cette invention comprend environ 80 % en volume de 2-octyldodecanol et environ 20 % en volume d'alkylglucoside. De préférence, l'alkylglucoside est constitué de 2-éthylhexylglucoside ou d'un mélange d'alkylglucosides comprenant approximativement plus de 10 atomes de carbone dans la chaîne alkyle.

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