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. 11, 2023
Filed:
Aug. 06, 2019
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 threaded connection with good internal-pressure and external-pressure sealability while preventing galling is provided. A threaded connectionincludes a pinand a box. The pinincludes a pin lip, a pin metal seal, and a cylindrical inner machined surface. The pin metal sealincludes a pin seal taper surfaceand a pin seal curvature surface. The boxincludes a box metal sealparallel to the pin seal taper surface. The pin metal sealsealingly contacts the box metal sealat a seal point SP. The threaded connection satisfies the following expressions, (1) and (2),  (1), and>1.6  (2).L is the length of the pin lip; Lm is the distance between the tip AP of the pin and the end point of the cylindrical inner machined surface; Ls is the distance between the tip AP of the pinand the seal point SP; tb is the wall thickness of the boxas measured at the seal point SP when the connection is made up; and tp is the wall thickness of the pinas measured at the seal point SP.