ALEXANDRIA, Va., May 12 -- United States Patent no. 12,624,865, issued on May 12, was assigned to Eavor Technologies Inc. (Calgary, Canada).

"Forming high-efficiency geothermal wellbores" was invented by Matthew Toews (Calgary, Canada), Michael Holmes (Calgary, Canada), Jonathan Hale (Calgary, Canada), Andrew Curtis-Smith (Calgary, Canada), Peter Andrews (Calgary, Canada), Paul Cairns (Calgary, Canada) and Ariel Torre (Calgary, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "Wellbore synthesis techniques are disclosed suitable for use in geothermal applications. Embodiments are provided where open hole drilled wellbores are sealed while drilling in sequenced operations with utilization of phase change ...