Threads with perturbations

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 17/042 (2006.01) F16L 15/00 (2006.01) F16L 15/06 (2006.01)

Patent

CA 2593228

A threaded connection including a pin member and a box member, and methods for manufacturing and forming said threaded connection. The pin member has a pin thread with a pin thread crest, a pin thread root, a pin load flank, and a pin stab flank. The box member has a box thread with a box thread crest, a box thread root, a box load flank, and a box stab flank. At least one of the pin thread crest, the pin load flank, the pin stab flank, the box thread crest, the box load flank, and the box stab flank has at least one perturbation formed thereon. Upon a selected make-up of the pin member with the box member, an increased contact stress exists between the pin thread and the box thread at the at least one perturbation.

L'invention concerne un raccord fileté comprenant un élément mâle et un élément femelle, ainsi que des procédés destinés à fabriquer et former ce raccord fileté. L'élément mâle comprend un filet mâle possédant un sommet de filet mâle, un fond de filet mâle, un flanc porteur mâle et un flanc d'engagement mâle. L'élément femelle comprend un filet femelle possédant un sommet de filet femelle, un fond de filet femelle, un flanc porteur femelle et un flanc d'engagement femelle. Au moins un élément choisi parmi le sommet de filet mâle, le flanc porteur mâle, le flanc d'engagement mâle, le sommet de filet femelle, le flanc porteur femelle et le flanc d'engagement femelle comporte au moins une perturbation formée sur celui-ci. Lors d'un assemblage sélectionné de l'élément mâle avec l'élément femelle, une contrainte de contact accrue se produit entre le filet mâle et le filet femelle au niveau de cette perturbation.

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