US Patent Issued to EXPRO NORTH SEA on Dec. 30 for "Downhole sealing apparatus" (British Inventors)

ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,509,962, issued on Dec. 30, was assigned to EXPRO NORTH SEA Ltd. (Dyce, Great Britain).

"Downhole sealing apparatus" was invented by Tristam Paul Horn (Westhill, Great Britain), Stephen Edmund Bruce (Blairgowrie, Great Britain), David Michael Shand (Banchory, Great Britain) and Gregor McLellan (Aberdeen, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "A downhole sealing apparatus for location in a downhole tubular includes a ball and a downhole seat. The ball may comprise a rigid core and a deformable covering. The ball is translatable downhole towards the seat, the ball and the seat having an open first configuration and a sealing second c...