ALEXANDRIA, Va., July 30 -- United States Patent no. 12,371,977, issued on July 29, was assigned to Saudi Arabian Oil Co. (Dhahran, Saudi Arabia).
"Collar detector" was invented by Bagus Wahyu Setiadi (Dhahran, Saudi Arabia).
According to the abstract* released by the U.S. Patent & Trademark Office: "A plunger assembly includes a plunger body and a collar detecting assembly. The plunger body is disposed within a wellbore string that has multiple collars. The collar detecting assembly includes a housing attached to the plunger body, and spring-loaded pins attached to and extending through a side wall of the housing to bear against an interior wall of the wellbore string. Each of the spring-loaded pins momentarily extends at an annular gap ...