US Patent Issued to Baker Hughes Oilfield Operations on July 21 for "Annular pressure activated downhole tool" (Texas Inventors)

ALEXANDRIA, Va., July 21 -- United States Patent no. 12,687,080, issued on July 21, was assigned to Baker Hughes Oilfield Operations LLC (Houston).

"Annular pressure activated downhole tool" was invented by Gregory L. Hern (Porter, Texas), Tuan Nguyen (Pearland, Texas) and Philip M. Gregurek (Katy, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "An annular pressure activated downhole tool has a housing including an outer surface, an inner surface defining a passage, an annular projection projecting into the passage from the inner surface, and an opening. A mandrel extends into the passage. The mandrel has a first end and a second end. A power spring support is detachably connected to the second end of t...