ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,257, issued on Oct. 14, was assigned to Saudi Arabian Oil Co. (Dhahran, Saudi Arabia).
"Completing and working over a wellbore" was invented by Mustafa Karakaya (Dhahran, Saudi Arabia) and Sohrat Baki (Dhahran, Saudi Arabia).
According to the abstract* released by the U.S. Patent & Trademark Office: "An assembly and method for completing a wellbore. The assembly includes a polished bore receptacle, a torque lock ring, and a left-hand threaded coupling. The torque lock ring is positioned inside the polished bore receptacle. The torque lock ring couples the polished bore receptacle to an upper completion assembly. The left-hand threaded coupling is positioned inside the polished bo...