Expandable tubular connection

Details Expandable tubular connection Expandable tubular connection

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 15/00 (2006.01) E21B 17/042 (2006.01) F16L 13/14 (2006.01)

Patent

CA 2563580

An expandable tubular pin (10) and box (12) connection is described having a feature of trapping the pin nose (26) after preferably deforming the pin nose (26) plastically in an outward direction away from the longitudinal axis (20) of the connection. The box end (32) is held away from the pin wall (34) before expansion so that its tendency to curl inwardly upon expansion causes it to bend against the pin wall (34) for sealing with it. The thread profile (14, 16) is also optimized to reduce flank separation as a result of expansion.

L'invention concerne une tige tubulaire (10) extensible et un raccordement femelle (12) dont une caractéristique est de piéger l'extrémité (26) après avoir, de préférence, déformé ladite extrémité (26) de manière plastique vers l'extérieur à distance de l'axe longitudinal (20) du raccordement. L'extrémité femelle (32) est tenue à distance de la paroi de tige (34) avant extension afin que sa tendance à s'incurver à l'intérieur lors de l'extension l'amène à se plier contre la paroi de tige (34) afin d'y adhérer de manière étanche. Le profil de filetage (14, 16) est également optimisé de manière à réduire la séparation de flanc à la suite de l'extension.

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