US Patent Issued to SCHLUMBERGER TECHNOLOGY on Feb. 18 for "Monovalent brine-based reservoir drilling fluid" (British, American Inventors)

ALEXANDRIA, Va., Feb. 19 -- United States Patent no. 12,227,690, issued on Feb. 18, was assigned to SCHLUMBERGER TECHNOLOGY Corp. (Sugar Land, Texas).

"Monovalent brine-based reservoir drilling fluid" was invented by Clotaire-Marie Eyaa Allogo (Sugar Land, Texas), Raymond Ravitz (Houston) and Sooi Kim Lim (Aberdeen, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "Wellbore fluids may contain an aqueous base fluid comprising a monovalent brine, a modified starch, and a metal oxide. Methods of using wellbore fluids may include drilling a subterranean well while circulating a wellbore fluid into the subterranean well, wherein the wellbore fluid contains an aqueous base fluid comprising a monovalent ...