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:
Sep. 12, 2023
Filed:
Aug. 07, 2020
Nippon Steel Corporation, Tokyo, JP;
Vallourec Oil and Gas France, Aulnoye-Aymeries, FR;
NIPPON STEEL CORPORATION, Tokyo, JP;
VALLOUREC OIL AND GAS FRANCE, Aulnoye-Aymeries, FR;
Abstract
A two-step threaded connection for steel pipe includes an intermediate seal and intermediate shoulders. A pinhas an inner male-threaded sectionand an outer male-threaded sectionA boxhas an inner female-threaded sectionand an outer female-threaded sectionThe pinhas a pin intermediate critical cross section PICCS located near an end of the first male-threaded sectionThe boxhas a box critical cross section BCCS located near an end of the inner female-threaded sectionand a box intermediate critical cross section BICCS located near an end of the outer female-threaded section The pinand the boxsatisfy the following relationships:PICCSA+BICCSA>BCCSA, and0.70≤PICCSA/BICCSA≤0.95.