ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,272, issued on Oct. 14, was assigned to Saudi Arabian Oil Co. (Dhahran, Saudi Arabia).

"Additive manufacture of casing liner in a wellbore" was invented by Peter J. Boul (Houston) and Carl J. Thaemlitz (Cypress, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are systems and methods for forming a casing liner in a wellbore of a hydrocarbon well. The forming including disposing a casing liner print head in an annular region located between a casing pipe disposed in a wellbore of a hydrocarbon well and a wall of the wellbore, and conducting a downhole lining operation including operating the casing liner print head to eject casing liner ...