ALEXANDRIA, Va., June 17 -- United States Patent no. 12,312,945, issued on May 27, was assigned to SAUDI ARABIAN OIL COMPANY (Dhahran, Saudi Arabia).

"System and method for wellbore identification in multi-lateral wellbores" was invented by Ahmed Abdullah Al-Ghamdi (Al Khobar, Saudi Arabia).

According to the abstract* released by the U.S. Patent & Trademark Office: "A well system includes a service rig positioned above a wellbore including a primary wellbore and a lateral wellbore extending from the primary wellbore, a string of casing lining a portion of the primary wellbore and having an inner surface coated with a first reactive material, a liner lining a portion of the lateral wellbore and having an inner surface coated with a second ...