ALEXANDRIA, Va., March 24 -- United States Patent no. 12,584,394, issued on March 24, was assigned to BJ Energy Solutions LLC (The Woodlands, Texas).

"Systems and methods to operate a dual-shaft gas turbine engine for hydraulic fracturing" was invented by Tony Yeung (The Woodlands, Texas), Ricardo Rodriguez-Ramon (The Woodlands, Texas), Diankui Fu (The Woodlands, Texas), Warren Zemlak (The Woodlands, Texas) and Caleb Barclay (The Woodlands, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "Systems and methods to pump fracturing fluid into a wellhead may include a gas turbine engine including a compressor turbine shaft connected to a compressor, and a power turbine output shaft connected to a power turbine...