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. 14, 2017
Filed:
May. 06, 2010
Suguru Yamaguchi, Amagasaki, JP;
Keiichi Nakamura, Wakayama, JP;
Masaaki Sugino, Nishinomiya, JP;
Michihiko Iwamoto, Wakayama, JP;
Gabriel Briquet, Aulnoye-Aymeries, FR;
Claire Patureau, Valenciennes, FR;
Daly Daly, Valenciennes, FR;
Bertrand Maillon, Valenciennes, FR;
Sylvain Beigneux, Valenciennes, FR;
Suguru Yamaguchi, Amagasaki, JP;
Keiichi Nakamura, Wakayama, JP;
Masaaki Sugino, Nishinomiya, JP;
Michihiko Iwamoto, Wakayama, JP;
Gabriel Briquet, Aulnoye-Aymeries, FR;
Claire Patureau, Valenciennes, FR;
Daly Daly, Valenciennes, FR;
Bertrand Maillon, Valenciennes, FR;
Sylvain Beigneux, Valenciennes, FR;
NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;
VALLOUREC OIL AND GAS FRANCE, Aulnoye-Aymeries, FR;
Abstract
A threaded joint for steel pipes comprising a pin () and a box (). The pin has a male thread () and a lip () which comprises (i) a sealing surface () and (ii) a nose portion () provided with a shoulder surface. The box has a female thread (), a sealing surface () and a shoulder surface. The shoulder surface of the pin comprises two distinct adjacent surfaces, main shoulder () in the inner side and sub shoulder () in the outer side. Correspondingly, the shoulder surface of the box comprises two distinct adjacent surfaces, main shoulder () in the inner side and sub shoulder () in the outer side. The main shoulder surfaces of the pin and box are disposed such as to prevent a radially inward deformation of the lip end, and the sub shoulder surfaces of pin and box are disposed such as to limit a radially outward deformation of the lip end. The main shoulder of the pin has a greater radial dimension than said sub shoulder of the pin, and at least the main shoulder surface of the pin is in axial abutment with at least the corresponding main shoulder surface of the box.