ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,804, issued on Nov. 18, was assigned to Baker Hughes Oilfield Operations LLC (Houston).
"External recirculation for gas lock relief" was invented by Xiaonan Lu (Houston), Zheng Ye (Houston) and Rissa Rutter (Houston).
According to the abstract* released by the U.S. Patent & Trademark Office: "A submersible pumping system for producing a fluid from a wellbore through production tubing to a wellhead includes a pump assembly that has at least one pump, a motor that drives the at least one pump, and a recirculation module. The recirculation module includes a recirculation mandrel positioned within the production tubing and a recirculation line extending from the recirculation valve t...