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. 24, 2022
Filed:
Apr. 05, 2018
Nippon Steel Corporation, Tokyo, JP;
Vallourec Oil and Gas France, Aulnoye-Aymeries, FR;
Keita Inose, 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 pipes having improved sealing performance is provided. A threaded connection () for steel pipes includes a pin () and a box (). The pin () includes a nose (), 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 (). When the position of the portion of the pin sealing surface () that first contacts the inner periphery of the box () during make-up defines a seal position (P), the distance between the seal position (P) and the end of the male thread () adjacent to the pin sealing surface () as measured in the pipe-axis direction is denoted by x, and the distance between the tip of the pin () and the end of the male thread () adjacent to the pin sealing surface () as measured in the pipe-axis direction is denoted by L, then, x/L is not smaller than 0.4 and not larger than 0.55.