F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
F16L 15/08 (2006.01)
Patent
CA 2489516
The invention concerns a high-performance threaded tubular joint comprising a first male tubular element (11) and a second female tubular element (12) mutually screwed together. One of the tubular elements (11, 12) comprises an unthreaded lip (38; 5) extending between its thread and its free end and having a sealing surface (40; 7) in sealed contact with the opposite surface (41; 8) of the other element after the first and second tubular elements have been screwed, have expanded and generated elastic return forces. The joint comprises a tubular sleeve (34; 36) slipped on prior to being screwed on the second element (12), positioned to extend substantially axially opposite said lip (3; 5) and, after diametrical expansion, generating an elastic return force which is added to that of the second element to counter the elastic return force of the first element thereby causing the second element to be at least shrunk fitted by the tubular sleeve.
L'invention concerne un joint tubulaire fileté de hautes performances comprenant un premier élément tubulaire mâle (11) et un second élément tubulaire femelle (12) mutuellement assemblés par vissage. Un des éléments tubulaires (11; 12) comporte une lèvre non filetée (38; 5) s'étendant entre son filetage et son extrémité libre et présentant une surface d'étanchéité (40; 7) en contact étanche avec la surface en regard (41; 8) de l'autre élément après vissage, expansion diamétrale puis génération de forces de retour élastique des premier et second éléments tubulaire. Le joint comprend une manchette tubulaire (34; 36) enfilée avant vissage sur le second élément (12), positionnée pour s'étendre axialement essentiellement en regard de ladite lèvre (3; 5) et, après expansion diamétrale, engendrant une force de retour élastique qui s'ajoute à celle du second élément pour contrarier la force de retour élastique du premier élément en réalisant de ce fait au moins le frettage du second élément par la manchette tubulaire.
Bruneau Albert
Durand Antoine
Verger Eric
Robic
Vallourec Mannesmann Oil & Gas France
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