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:
Jul. 20, 2021
Filed:
Mar. 02, 2018
Nippon Steel Corporation, Tokyo, JP;
Michihiko Iwamoto, Tokyo, JP;
Yusuke Takeda, Tokyo, JP;
Yasuhiro Kochi, Tokyo, JP;
Satoshi Maruta, Tokyo, JP;
Yusuke Toyota, Tokyo, JP;
Nippon Steel Corporation, Tokyo, JP;
Abstract
A threaded connection for steel pipe is provided that prevents cross-threading and provides good compression load resistance. A threaded connection () includes a pin () and a box (). The male thread stabbing flank () of the pin () includes two male thread stabbing flank portions () and (). The male thread stabbing flank portion () is located farther from the pipe axis (X) of the steel pipe () and has a stabbing flank angle (α1) of −10 to 15 degrees. The male thread stabbing flank portion () is located closer to the pipe axis (X) and has a stabbing flank angle (α2) of 20 to 60 degrees. The female thread stabbing flank () of the box () includes two female thread stabbing flank portions () and (). The female thread stabbing flank portion () is located farther from the pipe axis (X) and has a stabbing flank angle (α1) equal to the stabbing flank angle (α1) of the male thread stabbing flank portion (). The female thread stabbing flank portion () is located closer to the pipe axis (X) and has a stabbing flank angle (α2) equal to the stabbing flank angle (α2) of the male thread stabbing flank portion ().