C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
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.
International Drilling Fluids Limited
Sim & Mcburney
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