ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,239, issued on March 31, was assigned to Halliburton Energy Services Inc. (Houston).
"Cementing a geothermal wellbore" was invented by Paul J. Jones (Houston), Siva Rama Krishna Jandhyala (Houston) and Walmy Cuello Jimenez (Houston).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of cementing a geothermal wellbore includes pumping a first volume of cement slurry down a wellbore. The first volume of cement slurry has a first water to cement ratio. A second volume of cement slurry is pumped down the wellbore. The second volume of cement slurry has a second water to cement ratio that is less than the first water to cement ratio. The first volum...