ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,540,607, issued on Feb. 3, was assigned to Halliburton Energy Services Inc. (Houston).

"Hybrid drive and distributed power systems for well stimulation operations" was invented by Timothy Holiman Hunter (Duncan, Okla.), Austin Carl Schaffner (Duncan, Okla.) and Billy D. Coskrey (Duncan, Okla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A hybrid drive system that uses multiple sources of mechanical energy to drive an oilfield apparatus is provided. The hybrid drive system may include a first mover for generating first mechanical energy, the oilfield apparatus, a drivetrain for providing first mechanical energy from the first mover to the oilfield appar...