ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,441,934, issued on Oct. 14, was assigned to Energy Solutions (US) LLC (The Woodlands, Texas).
"Viscosifying friction reducers" was invented by Genyao Lin (The Woodlands, Texas), Louis Villafane (Pittsburgh), Kailas Sawant (Mars, Pa.), Kevin Frederick (Evans City, Pa.) and Shih-Ruey Chen (Studio City, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A water-in-oil emulsion that includes an oil phase (O) and an aqueous phase (A) at an O/A ratio of from about 1:8 to about 10:1; wherein the water-in-oil emulsion includes the oil phase as a continuous phase that includes an inert hydrophobic liquid, at least one water-insoluble hydrophobic monomer, and ...