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:
Feb. 06, 2024
Filed:
Dec. 20, 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 for steel pipe is provided in which galling does not easily occur on any of the inner and outer threads. A threaded connection for steel pipeincludes a pinand a box. The pinincludes: a nose; a tapered inner male thread; a tapered outer male thread; a pin inner sealing surface; a pin intermediate shoulder surface; and a pin intermediate sealing surface. The boxincludes: a tapered inner female thread; a tapered outer female thread; a box inner sealing surface; a box intermediate shoulder surface; and a box intermediate sealing surface. Each of the inner male thread, outer male thread, inner female threadand outer female threadincludes a perfect thread portion. Each perfect thread portion includes an inner end located relatively close to the tip of the pinand an outer end located relatively close to the end of the pinopposite to its tip. The threaded connection for steel pipesatisfies the following Expressions (1) and (2): (1), and (2).