ALEXANDRIA, Va., April 21 -- United States Patent no. 12,607,101, issued on April 21, was assigned to EXPRO NORTH SEA Ltd. (Dyce, Great Britain).
"Downhole apparatus and methods" was invented by Tristam Paul Horn (Westhill, Great Britain), Stephen Edmund Bruce (Blairgowrie, Great Britain) and David Michael Shand (Banchory, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "A well construction method in which a drilled bore is lined with a plurality of successively smaller diameter sections of bore-lining tubing including casing sections a liner section is provided. A liner is provided with an inner string extending to a distal end of the liner. The liner and the inner string are run into a distal s...