ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,435,258, issued on Oct. 7, was assigned to SAUDI ARABIAN OIL COMPANY (Dhahran, Saudi Arabia).

"Organoclay-free invert emulsion oil-based drilling fluids with polyhedral oligomeric silsesquioxane" was invented by Jothibasu Ramasamy (Dhahran, Saudi Arabia), Vikrant Wagle (Dhahran, Saudi Arabia) and Mohammad A. Otaibi (Dhahran, Saudi Arabia).

According to the abstract* released by the U.S. Patent & Trademark Office: "A composition of an invert emulsion oil-based drilling fluid formulation includes an invert emulsion of an oil phase and an aqueous phase. The oil phase includes an oleaginous fluid and a liquid viscosifier that is a polyhedral oligomeric silsesquioxane (POSS). A method incl...