Two-step, low torque wedge thread for tubular connector

E - Fixed Constructions – 21 – B

Patent

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Details

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

Patent

CA 2324457

A threaded pipe connection is disclosed that includes a box member (112) and a pin member (111). The box member (12) has two wedge thread steps each with a tapered, internal, generally dovetial-shaped wedge thread (114) having stab flanks (118), load flanks (116), roots (120), and crests (124). The pin member (111) has two wedge thread steps each with a tapered, external, generally dovetail- shaped wedge thread (115) having stab flanks (119), load flanks (117), roots (121), and crests (125). The internal thread (114) of the box member increases in width in one direction. The external thread (115) of the pin member increases in width in the other direction so that complementary flanks of the box member thread move into engagement during rotational make-up of the connection. The roots and crests of at least one wedge thread step on the box member (112) are dimensioned to contact complementary roots and crests on the pin member (111) upon final make-up. Also, stab (118) and load flanks (116) of at least one wedge thread step on the box member (112) are dimensioned to contact complementary stab (119) and load flanks (117) on the pin member (111) upon final make-up.

La présente invention concerne un raccord de tube fileté qui comprend un élément femelle (112) et un élément mâle (111). L'élément femelle (112) présente deux étages filetés (114), cunéiformes, chacun possédant un filetage interne conique, généralement en forme de queue d'aronde, des flancs de guidage (118), des flancs de charge (116), des gorges (120) et des crêtes (124). L'élément mâle (111) présente deux étages filetés (115), cunéiformes, chacun possédant un filetage externe conique, généralement en forme de queue d'aronde, des flancs de guidage (119), des flancs de charge (117), des gorges (121) et des crêtes (125). Le filetage interne (114) de l'élément femelle augmente en largeur dans une direction. Le filetage externe (115) de l'élément mâle augmente en largeur dans l'autre direction de façon que, durant le mouvement de rotation du raccordement, les flancs complémentaires du filetage de l'élément femelle s'engagent. Les gorges et les crêtes d'au moins un étage de filet cunéiforme de l'élément femelle (112) sont dimensionnés de façon à entrer en contact avec les gorges et les crêtes complémentaires de l'élément mâle (111) en fin de raccordement. De même, les flancs de guidage (118) et de charge (116) d'au moins un étage de filet cunéiforme de l'élément femelle (112) sont dimensionnés de façon à entrer en contact avec les flancs de guidage (119) et de charge (117) complémentaires de l'élément mâle (111) en fin de raccordement.

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