High torque modified profile threaded tubular connection

Details High torque modified profile threaded tubular connection High torque modified profile threaded tubular connection

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 15/06 (2006.01)

Patent

CA 2452756

A threaded pipe connection (1) having box and pin members (20, 10) is provided with inner engageable thread means on the box and pin members (20, 10), the thread means including a helical dove-tail thread (22, 12) having negative flank angles extending along the lengths of the box and pin members (20, 10), and a helical intermediate thread (25, 15) having positive flank angles extending along the lengths of the box and pin members (20, 10) adjacent the dove-tail thread (22, 12). Upon makeup, the intermediate threads (25, 15) generate hoop tension in the box member (20) and hoop compression in the pin member (10), and the dove-tail threads generate hoop compression in the box member (20) and hoop tension in the pin member (10).

L'invention concerne un raccord de tuyau fileté (1), à éléments mâle et femelle (20, 10), comprenant des moyens de filet intérieur s'engageant sur les éléments mâle et femelle (20, 10), les moyens de filet comprenant un filet en queue d'aronde hélicoïdal (22, 12), à inclinaisons négatives de flanc, s'étendant sur la longueur des éléments mâle et femelle (20, 10), et un filet intermédiaire hélicoïdal (25, 15), à inclinaisons positives de flanc, s'étendant sur la longueur des éléments mâle et femelle (20, 10), adjacent au filet en queue d'aronde (22, 12). Lors de la mise en place, les filets intermédiaires (25, 15) produisent une traction circulaire sur l'élément femelle (20) et une compression circulaire sur l'élément mâle (10), et les filets en queue d'aronde produisent une compression circulaire sur l'élément femelle (20) et une traction circulaire sur l'élément mâle (10).

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