ALEXANDRIA, Va., April 15 -- United States Patent no. 12,601,258, issued on April 14.
"Underground reservoir monitoring system" was invented by Shanjun Li (Katy, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present application provides an underground reservoir monitoring system for real-time monitoring changes of reservoir parameters. The system measures the alternating current signal when an alternating current passes through the transceiver along the casing, and calculates the alternating current flow parameters including phase velocity, group velocity, time difference, amplitude attenuation, and phase difference of the alternating current along the casing based on the alternating current signa...