US Patent Issued to ENERGY SOLUTIONS (US) on Aug. 11 for "Viscoelastic surfactant formulations and use in subterranean formations" (American, Senegalese, French Inventors)

ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,703,821, issued on Aug. 11, was assigned to ENERGY SOLUTIONS (US) LLC (Princeton, N.J.).

"Viscoelastic surfactant formulations and use in subterranean formations" was invented by Ahmed I. Rabie (Willingboro, N.J.), Arnaud Cadix (Lille, France), Rose Ndong (Dakar, Senegal), Pascal Herve (Princeton, N.J.), Qi Qu (Tomball, Texas) and Jian Zhou (Langhorne, Pa.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A viscoelastic surfactant formulation may include a zwitterionic surfactant with a general formula (I):where A is a C or SO, E1 is a linear or branched, saturated or unsaturated hydrocarbon chain having 1 to 4 carbon atoms, R1 and R2 are selected from alk...