Patents Assigned to VALLOREC OIL AND GAS FRANCE
  • Publication number: 20170101830
    Abstract: A threaded joint is constructed of a pin and a box. The pin includes, in order from an end thereof, a shoulder surface, a nose portion, a first sealing surface, a first male threaded portion, an annular portion, a second sealing surface, and a second male threaded portion. The box includes a shoulder surface, a recessed portion, a first sealing surface, a first female threaded portion, an annular portion, a second sealing surface, and a second female threaded portion. In the threaded joint, in a fastened state, the shoulder surfaces are in contact with each other, the first sealing surfaces are in contact with each other, the second sealing surfaces are in contact with each other, a clearance is provided between the nose portion and the recessed portion, a clearance is provided between the annular portions.
    Type: Application
    Filed: June 16, 2015
    Publication date: April 13, 2017
    Applicants: NIPPON STEEL & SUMITOMO METAL CORPORATION, VALLOREC OIL AND GAS FRANCE
    Inventors: Keita INOSE, Fumio OTA, Shin UGAI, Suguru YAMAGUCHI, Masaaki SUGINO