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US 5,494,120 AGranted
Glycoside-in-oil drilling fluid system
AssigneeShell Oil Company
InventorsArthur H. Hale, Royal E. Loftin
Life of this patent
Estimating the term…
Abstract
An invert oil emulsion drilling fluid containing oil, an emulsifier such as a fatty acid soap, clay or polymer, and a glycoside such as glucoside.
Claims3
A method for drilling a well comprising:
- rotating a drill string to cut a borehole into the earth;
- and
- circulating invert oil emulsion drilling fluid, said drilling fluid comprising oil, emulsifier and glycoside, through the drill string and through the annulus between the drill string and the borehole, the glycoside being at least about 30% by weight of the internal phase of the emulsion.
Dependencies are inferred from the claim text.