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:
Jun. 03, 2025
Filed:
Dec. 22, 2020
Nippon Steel Corporation, Tokyo, JP;
Vallourec Oil and Gas France, Aulnoye-Aymeries, FR;
Yousuke Oku, Tokyo, JP;
Satoshi Maruta, Tokyo, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
VALLOUREC OIL AND GAS FRANCE, Aulnoye-Aymeries, FR;
Abstract
In a threaded connection for pipe having a two-step thread construction with intermediate shoulder surfaces, compression resistance is further improved. Upon completion of make-up of the pinand box, the diameter of a stabbing clearance is 0.15 mm or smaller, where the stabbing clearance is defined between the stab flank of a male thread including an inner thread portionand an outer thread portionand the stab flank of a female thread including an inner thread portionand an outer thread portion, thereby causing the stab flanks of the male and female threads to start to be in contact before the angle of rotation θ of the intermediate shoulder surfacesandas appearing in a longitudinal cross section starts to rapidly increase, thus preventing accumulation of damage in the intermediate shoulder surfacesand