ALEXANDRIA, Va., June 2 -- United States Patent no. 12,644,379, issued on June 2, was assigned to Schlumberger Technology Corp. (Sugar Land, Texas).

"Pressure response test to detect leakage of rotating control device" was invented by Rodrigo Feliu (Sugar Land, Texas), Christopher Scott Del Campo (Sugar Land, Texas) and Emilio De Matias Salces (Clamart, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method includes initiating a managed pressure drilling (MPD) operation in an MPD system including a rotating control device (RCD) including at least one sealing element and a plurality of pressures sensors placed relative to the at least one scaling element. The RCD is positioned in the MPD system so as ...