ALEXANDRIA, Va., March 24 -- United States Patent no. 12,584,405, issued on March 24, was assigned to Schlumberger Technology Corp. (Sugar Land, Texas).

"Communication method for untethered downhole systems" was invented by Julien Toniolo (Sugar Land, Texas) and Henry Nguyen (Katy, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "The disclosure provides methods of communication for untethered systems. The method includes defining a window for sampling a torque-related current and a modulator rotor relative position-related parameter; using the defined window, recording local maximum and local minimum values of the torque-related current versus a modulator rotor relative position-related parameter of a ro...