Wellbore fluid

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

C09K 8/20 (2006.01)

Patent

CA 2066165

There is disclosed an aqueous wellbore fluid having a water-soluble carbohydrate additive comprising a monosaccharide component, an oligosaccharide component, or a mixture thereof, the carbohydrate component being employed in an amount suf- ficient to provide at least 10 % by weight of the monosaccharide/oligosaccharide component in the aqueous phase of the fluid. Most preferably, the carbohydrate additive is a concentrated water-soluble extract of a naturally derived material such as sugar cane, sugar beet or malted grain. The wellbore fluid described have excellent shale inhibitive properties.

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