The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 14, 2013
Filed:
Sep. 22, 2011
Ikuji Hoshino, Osaka, JP;
Masaki Yamano, Osaka, JP;
Makoto Sakamoto, Osaka, JP;
Keiichi Nakamura, Osaka, JP;
Jun Masubuchi, Osaka, JP;
Kenta Sakai, Osaka, JP;
Ikuji Hoshino, Osaka, JP;
Masaki Yamano, Osaka, JP;
Makoto Sakamoto, Osaka, JP;
Keiichi Nakamura, Osaka, JP;
Jun Masubuchi, Osaka, JP;
Kenta Sakai, Osaka, JP;
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Abstract
The present invention provides a method which allows simply, easily and accurately evaluating the fastening state of shoulder parts of a threaded joint for use as a joint of pipes or tubes, such as OCTG, during fastening or after fastening. The fastening state evaluation method for a threaded jointof pipes or tubes according to the present invention is characterized in that it transmits ultrasonic surface waves from the internal surface of either one of the pinand the boxtoward the internal surface of the other one of the pinand the boxthrough the shoulder partsof the pinand the box, and on the basis of the transmitted wave intensity or the reflected wave intensity thereof, determines whether or not the fastening state of the threaded jointis satisfactory.