ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,267, issued on Oct. 14, was assigned to Schlumberger Technology Corp. (Sugar Land, Texas).
"Control systems and methods for RCD active pressure compensation" was invented by Nathaniel Pettibone (Houston) and Kody Carrillo (Sugar Land, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "Control systems and methods for rotating control device (RCD) active pressure compensation are provided. A control system for an RCD for rotary drilling in a wellbore includes: RCD equipment having an internal pressure P3, wellbore having a wellbore pressure P1, the RCD equipment being operably connected to the wellbore, a return line leading toward a ground surface ...