ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,486,726, issued on Dec. 2, was assigned to COILCOM AS (Sandnes, Norway).
"Coiled tubing" was invented by Borge Richard Kolstad (Stavanger, Norway) and Bjorn Brekne (Hafrsfjord, Norway).
According to the abstract* released by the U.S. Patent & Trademark Office: "A length of tubing and related apparatus and methods are described, where the length of tubing is deployable from a coiled configuration to an uncoiled configuration for performing a coiled tubing operation in a wellbore. The length of tubing includes a pipe of metal, and a liner of composite material that lines the pipe. The liner or the lined pipe includes a wall structure that incorporates means to communicate at least one s...