ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,492,333, issued on Dec. 9, was assigned to Baker Hughes Oilfield Operations LLC (Houston).

"Method of treating a subterranean formation with delayed acid system" was invented by Dustin Palm (Cypress, Texas), Frances H. DeBenedictis (Spring, Texas), Harold Gene Hudson (The Woodlands, Texas) and Sandra L. Berry (Tomball, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "A polymer-free fluid may be used to delay reaction of hydrofluoric acid with a subterranean formation. The fluid contains an organic compound having a bifunctional group, HF or a HF-generating compound, urea and an organophosphonate."

The patent was filed on May 8, 2023, under Applicati...