ALEXANDRIA, Va., April 21 -- United States Patent no. 12,607,089, issued on April 21, was assigned to Welltec Manufacturing Center Completions ApS (Esbjerg N, Denmark).
"Annular barrier" was invented by Ricardo Reves Vasques (Zug, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "An annular barrier has a tubular metal part and an expandable metal sleeve having ends connected with the tubular metal part. An annular space is between the expandable metal sleeve and the tubular metal part, an expansion opening is provided in the tubular metal part through which fluid may enter for expansion. The annular barrier further includes a eutectic material and/or a bentonite material which in a first condition i...