US Patent Issued to SAUDI ARABIAN OIL on May 13 for "Fill up and circulation tool with return valve for inner string cementation" (Saudi Arabia Inventor)

ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,714, issued on May 13, was assigned to SAUDI ARABIAN OIL COMPANY (Dhahran, Saudi Arabia).

"Fill up and circulation tool with return valve for inner string cementation" was invented by Dautmammet Rejepov (Abqaiq, Saudi Arabia).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system includes a casing string configured to be deployed into the wellbore, an inner string configured to deployed inside of the casing string, a light mud disposed in the casing-wellbore annulus and the casing-inner string annulus, an inner string fill up tool connected to the inner string and configured to displace the light mud in the casing-inner string annulus with a heavy m...