ALEXANDRIA, Va., April 2 -- United States Patent no. 12,264,578, issued on April 1, was assigned to Halliburton Energy Services Inc. (Houston).

"Fluid monitoring in oil and gas wells using ultra-deep azimuthal electromagnetic logging while drilling tools" was invented by Nigel Mark Clegg (Norwick, Great Britain), Ahmet Celalettin Aki (Dubai, United Arab Emirates) and Alban Gerard Duriez (Houston).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for monitoring one or more formation fluids in a subterranean formation. The method may include disposing a logging while drilling (LWD) system into a wellbore, measuring the one or more formation fluids in the subterranean formation with an electromagnetic (EM)...