ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,832, issued on March 25, was assigned to Saudi Arabian Oil Co. (Dhahran, Saudi Arabia).
"Methods for wellhead workover" was invented by Ahmed Abdullah Al-Mousa (Doha, Saudi Arabia), Omar Saud Almuhaidib (Khobar, Saudi Arabia) and Omar M. Alhamid (Dammam, Saudi Arabia).
According to the abstract* released by the U.S. Patent & Trademark Office: "The method includes providing a wellhead comprising a first casing spool and an extended tubing spool disposed above the first casing spool, and a production tree comprising a wing valve disposed above the extended tubing spool. The method further includes decoupling the extended tubing spool from the wellhead, coupling a replacement tubin...