ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,824, issued on Nov. 18, was assigned to CHINA PETROLEUM & CHEMICAL Corp. (Beijing).
"Mud pulser" was invented by Sheng Zhan (Houston) and Sam Seldon (Houston).
According to the abstract* released by the U.S. Patent & Trademark Office: "A mud pulser includes an inlet assembly, a main-valve assembly, a servo-valve assembly, a motor assembly and a collar. The servo-valve assembly has a servo-valve, which includes a servo-valve plugging member and a servo-valve chamber housing the servo-valve plugging member and having a first orifice and a second orifice. A servo-valve shaft is connected to the servo-valve plugging member and configured to be driven to perform a reciprocating moveme...