ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,474,010, issued on Nov. 18, was assigned to NIPPON STEEL Corp. (Tokyo) and VALLOUREC OIL AND GAS FRANCE (Aulnoye-Aymeries, France).
"Oil-well metal pipe" was invented by Tomoka Abe (Tokyo), Koji Akioka (Tokyo), Tomoya Matsuyama (Tokyo) and Takao Kuranishi (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an oil-well metal pipe which has excellent galling resistance even when a plating layer is formed on or above a contact surface of only one of a pin and a box. An oil-well metal pipe (1) according to the present disclosure includes: a pin (40) including a pin contact surface (400) with an external thread part (41); and a box (50) includi...