US Patent Issued on Nov. 18 for "Double-acting downhole hydraulic reciprocating pump system and methods of using same" (Oklahoma Inventor)

ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,907, issued on Nov. 18.

"Double-acting downhole hydraulic reciprocating pump system and methods of using same" was invented by James R. Redfearn (Tulsa, Okla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of pumping produced liquids from the depths of a wellbore during a reset stroke and a power stroke of a pump located downhole, wherein the pump comprises an upper barrel, a lower barrel, an upper plunger within the upper barrel, a lower plunger within the lower barrel, an upper ported intake sub with an upper outlet check valve and an upper intake check valve, a dual ported mandrel, and a lower ported intake sub with a lower intake check ...