ALEXANDRIA, Va., June 16 -- United States Patent no. 12,305,481, issued on May 20, was assigned to Rival Downhole Tools LC (Houston).
"Selectively activated friction reduction tool and method" was invented by Gunther H H von Gynz-Rekowski (Montgomery, Texas) and Mark Allen Reeves (Houston).
According to the abstract* released by the U.S. Patent & Trademark Office: "A friction reduction tool configured for selective activation downhole in response to a variation in a media flow's operating condition. A valve assembly and an activation assembly are both positioned downstream of a power assembly, which is configured to rotate a rotating valve segment of the valve assembly with media flow through the tool. The activation assembly is configure...