US Patent Issued to National Oilwell Varco on Jan. 27 for "Durable valves for displacement pumps" (Texas, Oklahoma Inventors)

ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,535,068, issued on Jan. 27, was assigned to National Oilwell Varco LP (Houston).

"Durable valves for displacement pumps" was invented by William Bryce Brock (Houston), Brendan Sean Young (Houston) and Mark Alan Staggs (McAlester, Okla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A valve for a displacement pump includes a valve body having an annular strikeface and defining an annular receptacle, and an annular seal received in the receptacle of the valve body, the seal including an annular contact surface, wherein the seal defines a cumulative displacement ratio of (i) at least one of at most 0.20 at a location that is spaced 40% from an inner diamet...