ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,428,589, issued on Sept. 30, was assigned to SAUDI ARABIAN OIL COMPANY (Dhahran, Saudi Arabia).

"Synthesis and use of grafted graphene in aqueous drilling fluids as low shear rate viscosity enhancer" was invented by Ashok Santra (The Woodlands, Texas) and Carl Thaemlitz (Cypress, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "A composition that includes a polymer-grafted graphene particle and aqueous-based drilling fluid is provided. At least one side of the graphene particle comprises a grafted polymer. A method of using an aqueous-based drilling fluid is also provided. The method includes introducing the aqueous-based drilling fluid into a well...