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:
Apr. 18, 2023
Filed:
Dec. 27, 2017
Nippon Steel Corporation, Tokyo, JP;
Vallourec Oil and Gas France, Aulnoye-Aymeries, FR;
Yousuke Oku, Tokyo, JP;
Masaaki Sugino, Tokyo, JP;
Nippon Steel Corporation, Tokyo, JP;
Vallourec Oil and Gas France, Aulnoye-Aymeries, FR;
Abstract
A threaded connection for steel pipe with improved sealing performance is provided. A threaded connection () includes a pin () and a box (). The pin () includes a pin shoulder surface (), a pin sealing surface () and a male thread (). The box () includes a box shoulder surface (), a box sealing surface () and a female thread (). The male thread () and female thread () are constituted by wedge threads. When the connection has been made up, the pin shoulder surface () is in contact with the box shoulder surface (), the stabbing flank and load flank of the male thread () are in contact with the stabbing flank and load flank, respectively, of the female thread (), and the pin sealing surface () is in contact with the box sealing surface (). The shoulder angle is 4° or larger. The shoulder angle is the angle formed by each of the shoulder surfaces () with a plane perpendicular to the pipe axis (CL) when the connection is not made up.