ALEXANDRIA, Va., June 2 -- United States Patent no. 12,644,377, issued on June 2.

"Method of using non-magnetic solid tracers" was invented by Talgat Shokanov (Houston).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of using a tracer additive in a wellbore that includes forming a utility fluid mixture comprising the tracer additive, and disposing the utility fluid into the wellbore so that the utility fluid comes into contact with a target formation. Upon contacting the utility fluid with the target formation for an amount of time, returning a remnant fluid that includes at least a portion of the utility fluid to a surface for testing. The tracer additive has a first composition, and is in a solid no...