ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,460,541, issued on Nov. 4, was assigned to QuantumPro Inc. (Houston).

"Method of using a perforator device for the transfer of nanoparticle tracer additives into a formation and cluster level flow mapping" was invented by Talgat Shokanov (Houston), John Oliver (Sugar Land, Texas) and Quanxin Guo (Sugar Land, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of using a tracer additive in a wellbore that includes using a perforator device, the perforator device having an at least one shaped charge associated with the tracer additive. The method includes deploying the perforator device into the wellbore in manner whereby the perforator device ar...