ALEXANDRIA, Va., June 16 -- United States Patent no. 12,305,485, issued on May 20, was assigned to ConocoPhillips Co. (Houston).
"Well collapse reconnect method" was invented by James S. Rutherford (Tananger, Norway), Charles Colpitt (Tananger, Norway) and Andrew H. Whitfield (Tananger, Norway).
According to the abstract* released by the U.S. Patent & Trademark Office: "Damaged casing or liner in a hydrocarbon well, e.g. caused by collapsed formation, is remediated using a unique straddle joint. Damaged liner is milled away and a straddle joint (20) located in the exposed ends of liner (8,9), bridging the gap between them and restoring most of the inner diameter. The straddle joint (20) includes cement ports (25) through which cement may ...