ALEXANDRIA, Va., Feb. 5 -- United States Patent no. 12,215,568, issued on Feb. 4, was assigned to Saudi Arabian Oil Co. (Dhahran, Saudi Arabia).

"Removal and collection of wellbore scale and debris" was invented by Bandar S. Malki (Dammam, Saudi Arabia), Juan Manuel Polo Teran (Dhahran, Saudi Arabia) and Mohammad Abdullah Alkhateeb (Dammam, Saudi Arabia).

According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus includes a scale removal head, a scale collector, a circulating plate assembly, and a guide. The scale removal head includes a plurality of blades that scrape against a wall of a wellbore to remove scale from the wall of the wellbore in response to rotation of the apparatus. The scale collector defin...