ALEXANDRIA, Va., June 6 -- United States Patent no. 12,281,550, issued on April 22, was assigned to Fervo Energy Co. (Houston).

"Methods and systems to control flow and heat transfer between subsurface wellbores connected hydraulically by fractures" was invented by Jack Norbeck (Golden, Colo.) and Timothy Latimer (Houston).

According to the abstract* released by the U.S. Patent & Trademark Office: "A controlled rate of propagation of the fluid saturation front or thermal front is desired in may oil and gas and geothermal operations. Natural fractures and fractures created during hydraulic stimulation may have heterogeneous hydraulic properties resulting in uneven flow distributions, therefore leading to short-circuiting and breakthrough i...