ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,279, issued on Oct. 14, was assigned to Saudi Arabian Oil Co. (Dhahran, Saudi Arabia).
"Multi-stage plunger hydrocarbon lifting" was invented by Amr Mohamed Zahran (Al Khobar, Saudi Arabia), Syed Muhammad Bin Syed Taha (Dhahran, Saudi Arabia), Mohamed Sayed (Dammam, Saudi Arabia), Gustavo Alvarez (Dhahran, Saudi Arabia) and Bagus Wahyu Setiadi (Dhahran, Saudi Arabia).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method includes lifting a first plunger within a production string disposed within a wellbore. The production string divides the production string into multiple stages. The plunger landing assemblies include a first landing assembly and an...