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. 19, 2008
Filed:
Feb. 04, 2002
Thierry Noel, Sebourg, FR;
Gabriel Roussie, Mons en Baroeul, FR;
Emmanuel Varenne, Villefranche-sur-Saone, FR;
Thierry Noel, Sebourg, FR;
Gabriel Roussie, Mons en Baroeul, FR;
Emmanuel Varenne, Villefranche-sur-Saone, FR;
Vallourec Mannesmann Oil & Gas France, Aulnoye-Aymeries, FR;
Sumitomo Metal Industries, Ltd., Osaka-shi, JP;
Abstract
A threaded tubular connection includes two elements, male and female, made up one into the other to a given torque in which, prior to making up, at least one thread face under contact pressure has a convexly rounded shape that is continuous over its width with a radius of curvature in the range 2 to 60 mm and is in point contact with the corresponding face of the mating element. Such a threaded connection has an increased resistance to breakout or to overtorquing. In one embodiment, the convexly rounded face is a male or female thread flank and one of the male or female threads includes a groove opening into the thread crest to render flexible either the convexly rounded flank or the corresponding flank. Such a geometry can accommodate variations in contact between the flanks.