ALEXANDRIA, Va., June 6 -- United States Patent no. 12,281,654, issued on April 22, was assigned to Halliburton Energy Services Inc. (Houston).
"Permanent magnet motor" was invented by Hassan Mansir (Frimley, Great Britain), Jeffrey Frey (Tulsa, Okla.), Robert Charles De Long (Tulsa, Okla.) and Dezhi Zheng (Tulsa, Okla.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A downhole electric submersible pump (ESP) assembly. The downhole ESP assembly comprises a permanent magnet motor (PMM) comprising a first drive shaft, a stator, and a rotor disposed within the stator and comprising a core coupled to the first drive shaft, wherein the core retains a first permanent magnet element within a first magnet pocket defi...