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:
Nov. 22, 2022
Filed:
Jul. 24, 2019
Nippon Steel Corporation, Tokyo, JP;
Vallourec Oil and Gas France, Aulnoye-Aymeries, FR;
Yousuke Oku, Tokyo, JP;
Sadao Douchi, Tokyo, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
VALLOUREC OIL AND GAS FRANCE, Aulnoye-Aymeries, FR;
Abstract
A threaded connection for steel pipe that provides high torque performance, high tension performance and high sealability is provided. A threaded connectionincludes: a tubular pinincluding a pin shoulder, a male threadand a pin seal; and a tubular boxincluding a box shoulder, a female threadand a box seal. The male and female threadsandare constituted by wedge threads. The pin sealis provided between the pin shoulderand the male thread. The box sealcorresponds to the pin sealand is located on the inner peripheral surface of the box. When the connection is made up, the pin shoulderis spaced apart from the box shoulder. The threaded connectionsatisfies the following expression, (1):3%≤()/≤7%  (1). In expression (1), LP is the pitch between loading flanksof the male thread, and SP is the pitch between stabbing flanksof the male thread