Patents Represented by Attorney Gary Nath

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  • Salt stable lubricant for water base drilling fluids
    Patent number: 4280915
    Abstract: A water base drilling fluid having enhanced lubricating properties in the presence of polyvalent cations comprising a mixture of (1) water; (2) finely divided inorganic solids; (3) an alkanolamide of a saturated fatty acid having 8 to 20 carbon atoms, or triglycerides thereof, and (4) an alkanolamide of an unsaturated fatty acid having 18 carbon atoms, or triglycerides thereof.
    Type: Grant
    Filed: June 23, 1977
    Date of Patent: July 28, 1981
    Assignee: NL Industries, Inc.
    Inventor: James D. Kercheville