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US 6,632,777 B1Granted
Drilling fluids comprising oil emulsions in water
AssigneesENI S.p.A., Enitecnologie S.p.A.
InventorsStefano Carminati, Alberto Guarneri, Marco Brignoli
Life of this patent
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Abstract
Composition of water-based drilling fluids characterized in that they comprise an oil in water emulsion.
Claims12
A process comprising blocking the micropores of shales with a drilling fluid comprising an oil-in-water emulsion prepared with polyoxyethylenesorbitan mono-oleate as an emulsifying agent which is present in a quantity from 2% to 10% by weight of the drilling fluid.
Dependencies are inferred from the claim text.