Environmentally safe water base drilling fluid
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United States of America Patent
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Apr 4, 1995
Grant Date -
N/A
app pub date -
Dec 24, 1992
filing date -
Dec 24, 1992
priority date (Note) -
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Abstract
The invention provides a water base drilling fluid having decreased swelling effect on hydratable shales contacted by the drilling fluid wherein the aqueous phase contains an alkyl glucoside solubilized therein. Another embodiment of the invention provides an aqueous solution for addition to drilling fluids to decrease the swelling of hydratable shales contacted by the drilling fluid, the solution comprising an aqueous phase having dissolved (solubilized) therein from about 50% to about 85% by weight methyl glucoside and at least about 2% by weight of an alkali metal hydroxide.
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