US Patent Issued to Chevron U.S.A. on Sept. 23 for "Carbon dioxide sequestered proppants for well stimulation" (Texas Inventors)

ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,446, issued on Sept. 23, was assigned to Chevron U.S.A. Inc. (San Ramon, Calif.).

"Carbon dioxide sequestered proppants for well stimulation" was invented by Caleb Kimbrell Carroll (The Woodlands, Texas), Seung Jin Han (Katy, Texas) and Said Rachid Daher (Pasadena, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of making a hydraulic fracturing slurry can include contacting an aqueous solution comprising calcium ions with a carbon dioxide source producing a carbonated aqueous solution. Substrate particles can be submerged in the carbonated aqueous solution to produce a calcium carbonate coated proppant wherein the carbon dioxide is se...