Cylindrical tapered thread form for tubular connections

Details Cylindrical tapered thread form for tubular connections Cylindrical tapered thread form for tubular connections

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 15/06 (2006.01) E21B 17/02 (2006.01) F16L 25/04 (2006.01)

Patent

CA 2743512

A thread form is shown which is used to make a threaded connection between two tubular members and which is capable of being screwed together and subsequently unscrewed. A pin member is provided having external threads with stab flanks and load flanks and flat crests and roots for mating with the mating internal threads of a box member to make up a pipe connection. The thread crests on the pin member are cylindrical with respect to a central longitudinal axis of the tubular member while the thread roots are cut on a taper so that the height of the threads vary over the length of the thread form. The threads on the pin and box members can also be cut oppositely so that respective members of the thread forms are mirror images of each oth-er.

L'invention porte sur un profil de filet qui est utilisé pour établir une connexion filetée entre deux éléments tubulaires et qui peut être vissé et ensuite dévissé. Un élément de broche est prévu et comporte des filets externes présentant des flancs de stabilisation et des flancs de charge et des crêtes et des racines plates pour s'accoupler avec les filets internes d'accouplement d'un élément de réceptacle afin de former une connexion filetée. Les crêtes de filet sur l'élément de broche sont cylindriques par rapport à un axe longitudinal central de l'élément tubulaire, alors que les racines de filet sont taillées de façon conique de telle sorte que la hauteur des filets varie sur la longueur du profil de filet. Les filets sur les éléments de broche et de réceptacle peuvent aussi être taillés de façon opposée de telle sorte que des éléments respectifs des profils de filet soient une reproduction exacte les uns des autres.

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