ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,460,505, issued on Nov. 4, was assigned to Kureha Corp. (Tokyo).
"Frac plug and method for manufacturing same, and method for sealing borehole" was invented by Shinnosuke Yoshida (Tokyo) and Shinya Takahashi (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a frac plug or the like capable of being inserted into a borehole to seal the borehole with high strength, and then quickly disassembled and removed, thereby efficiently producing petroleum. A frac plug according to the present embodiment has a member made of a magnesium (Mg) alloy. The member has a multi-phase structure including a first phase, which is a matrix phase, and a second ph...