US Patent Issued to NIPPON STEEL, VALLOUREC OIL AND GAS FRANCE on June 3 for "Threaded connection for pipe" (Japanese Inventors)

ALEXANDRIA, Va., June 4 -- United States Patent no. 12,320,206, issued on June 3, was assigned to NIPPON STEEL Corp. (Tokyo) and VALLOUREC OIL AND GAS FRANCE (Aulnoye-Aymeries, France).

"Threaded connection for pipe" was invented by Yousuke Oku (Tokyo) and Satoshi Maruta (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "In a threaded connection for pipe having a two-step thread construction with intermediate shoulder surfaces, compression resistance is further improved. Upon completion of make-up of the pin 2 and box 3, the diameter of a stabbing clearance is 0.15 mm or smaller, where the stabbing clearance is defined between the stab flank of a male thread including an inner thread portion 27 and an out...