Tubular component for drilling and operating hydrocarbon...

E - Fixed Constructions – 21 – B

Patent

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E21B 17/042 (2006.01)

Patent

CA 2758625

The invention concerns a tubular component for a threaded connection, having at one of its ends (1; 2) a threaded zone (3; 4) formed on its external or internal peripheral surface depending on whether the threaded end is of the male or female type, said end (1; 2) finishing in a terminal surface (7; 8), said threaded zone (3; 4) having, over at least a portion, threads (32; 42) comprising, when viewed in longitudinal section passing through the axis of the tubular component, a thread crest (35), a thread root (36), a load flank (30, 40), a stabbing flank (32, 42), the width of the thread crests (35) reducing in the direction of the termi-nal surface (7, 8) while the width of the thread roots (36) increases, characterized in that the profile of the load flanks (30; 40) and/or the stabbing flanks (32; 42), viewed in longitudinal section passing through the axis (10) of the tubular component, has as a central portion a continuous curve (34) provided with a point of inflection (I), said profile being convex at the thread crest and concave at the thread root. The invention also concerns a threaded connection.

L'invention porte sur un composant tubulaire pour un raccord fileté présentant, à l'une de ses extrémités (1 ; 2), une zone filetée (3 ; 4) formée sur sa surface périphérique externe ou interne, selon si l'extrémité filetée est du type mâle ou femelle, ladite extrémité (1 ; 2) se terminant dans une surface terminale (7 ; 8), ladite zone filetée (3 ; 4) présentant, sur au moins une partie, des filets (32 ; 42) comprenant, lorsqu'ils sont observés en coupe longitudinale passant par l'axe du composant tubulaire, une crête de filet (35), un fond de filet (36), un flanc de charge (30, 40) et un flanc de guidage (32, 42), la largeur des crêtes de filet (35) se réduisant dans la direction de la surface terminale (7, 8) alors que la largeur des fonds de filet (36) augmente. L'invention est caractérisée en ce que le profil des flancs de charge (30 ; 40) et/ou des flancs de guidage (32 ; 42), observé en coupe longitudinale passant par l'axe (10) du composant tubulaire, présente une partie centrale d'une courbe continue (34) dotée d'un point d'inflexion (I), ledit profil étant convexe au niveau de la crête de filet et concave au niveau du fond de filet. L'invention porte également sur un raccord fileté.

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