Threaded joint for steel pipes

Details Threaded joint for steel pipes Threaded joint for steel pipes

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 15/04 (2006.01) E21B 17/042 (2006.01)

Patent

CA 2578008

In a threaded joint for steel pipes which are connected by threaded engagement of a pin member having a tapered male thread, a metal seal-forming portion, and a torque shoulder-forming portion on the end of a pipe, and a box member having a tapered female thread, a metal seal-forming portion, and a torque shoulder forming-portion corresponding to these on the end of a pipe, a buttress thread having contact at the load flanks and the thread root surface and gaps at the thread crest surface and the stabbing flanks is mixed in a single joint with a rugged thread having contact at the load flanks and stabbing flanks and having gaps at the thread root surface and thread crest surface.

La présente invention concerne un raccord fileté destiné à des tuyaux d'acier qui sont connectés par vissage d'un embout. Cet embout possède un filetage mâle conique, une partie métallique formant l'étanchéité, une partie formant un épaulement de couple sur l'extrémité du tuyau, un manchon possédant un filetage femelle conique, une partie métallique formant l'étanchéité, la partie formant un épaulement de couple correspondant à celle de l'extrémité du tuyau, un filetage buttress en contact avec les flancs de charge et la surface de base de filet et des écartements au niveau de la surface de sommet du filet et les flancs de guidage, est mélangé en un seul raccord avec un filet robuste en contact avec les flancs de charge et les flancs de guidage et possédant des écartements au niveau de la surface de base de filet et de la surface de sommet de filet.

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