ALEXANDRIA, Va., July 15 -- United States Patent no. 12,662,930, issued on June 23, was assigned to Schlumberger Technology Corp. (Sugar Land, Texas).
"Calibrating friction factor and rock fracture properties" was invented by Bo Liu (Beijing), Yupeng Xu (Beijing), Feng Feng (Beijing) and Yan Song Huang (Beijing).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for calibrating a model of a subterranean formation includes capturing one or more measurements at a surface of a wellbore that extends into a subterranean formation. The measurements include a surface torque (STOR) on a drill string that extends into the wellbore and a surface weight (SWOB) on the drill string. The method also includes determini...