E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/042 (2006.01) F16L 15/06 (2006.01)
Patent
CA 2324456
A threaded pipe connection is disclosed that includes a box member (112) and a pin member (111). The box member (112) has a tapered, internal, generally dovetail-shaped thread (114) incorporated in a two-step wedge configuration such that there exists a smaller step and a larger step each with stab flanks, load flanks, roots, and crests. The internal thread (114) has a beginning and an end and increases in width in one direction. The pin member (111) also has a tapered, external, generally dovetail-shaped thread (115) incorporated in a two-step wedge configuration such that there exists a smaller step and a larger step each with stab flanks load flanks, roots, and crests. The external thread (115) increases in width in the other direction so that the complementary flanks of the respective threads move into engagement during rotational make-up of the connection and form sealing surfaces that resist the flow of fluids between the threads on the smaller step of the box member (112) and the smaller step of the pin member (111) upon rotational make-up of the connection, while leaving clearance between the threads on the larger step of the box member and the larger step of the pin member upon rotational make-up of the connection.
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 un filetage interne (114), conique, généralement en forme de queue d'aronde, dans une configuration biétagée cunéiforme telle qu'il existe un petit et un grand pas, chacun possédant des flancs de guidage, des flancs de charge, des gorges et des crêtes. Le filetage interne montre un début et une fin et il augmente en largeur dans une direction. L'élément mâle (111) présente aussi un filetage externe (114), conique, généralement en forme de queue d'aronde, dans une configuration biétagée telle qu'il existe un petit et un grand pas, chacun possédant des flancs de guidage, des flancs de charge, des gorges et des crêtes. Le filetage externe (115) augmente en largeur dans l'autre direction de façon que, durant le mouvement de rotation du raccordement, les flancs complémentaires des filetages respectifs forment, entre les filetages à petit pas des éléments femelle (112) et mâle (111), des surfaces de joints qui résistent au flux des liquides, tout en laissant un passage entre les filetages à grand pas desdits éléments.
Borden Ladner Gervais Llp
Hydril Company
LandOfFree
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