Salt free invert drilling mud

Details Salt free invert drilling mud Salt free invert drilling mud

C - Chemistry, Metallurgy

09

K

C09K 8/36 (2006.01) E21B 7/00 (2006.01)

Patent

CA 2451926

A fluid is provided for the drilling, workover and completion of a subterranean well comprising of an oil emulsion invert, containing an emulsifier, lime, clay and/or polymer and a aqueous internal phase consisting of molasses which is a solution of sucrose, plus some glucose, fructose and other organic and inorganic matter in water. Further the vapor activity of the internal phase can be adjusted with the use of desiccants to provide increased shale stability while drilling. Desiccants comprised of anhydrous salts are preferred, such as trisodium phosphate and zinc sulfate.

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