ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,486,748, issued on Dec. 2.
"Hybrid oilfield pumping system" was invented by Roy Aune (Golden, Colo.), Zack Thornton (Piedmont, Okla.) and Kirk Fiscus (Denver).
According to the abstract* released by the U.S. Patent & Trademark Office: "Oilfield pumping systems are improved by the incorporation of a reciprocating gas engine having a mode of operation that seeks to maintain a constant engine speed or rotational velocity. A driveline including a transmission with shiftable gears connects the reciprocating gas engine with a hydraulic pump configured for use in oilfield hydraulic fracturing operations. A control system is configured with programmatic instructions for operating a dual elect...