US Patent Issued to SHELL USA on Oct. 6 for "Method of creating an annular zonal isolation seal in a downhole annulus" (Dutch Inventor)

ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,753,679, issued on Oct. 6, was assigned to SHELL USA INC. (Houston).

"Method of creating an annular zonal isolation seal in a downhole annulus" was invented by Walter Stam (Amsterdam).

According to the abstract* released by the U.S. Patent & Trademark Office: "An isolation joint is provided with a downhole tubular that has an expandable section which, in axial direction, is sandwiched between a first separator section and a second separator section of the downhole tubular. The expandable section has a circumferential band of increased wall thickness compared to the wall thicknesses of the first and second separator sections. Furthermore, the downhole tubular is provided with a mating ...