Radially expanding a tubular element

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 43/10 (2006.01) F16L 55/165 (2006.01)

Patent

CA 2667425

The invention relates to a method of radially expanding a tubular element. The method comprises inducing the wall of the tubular element to bend radially outward and in axially reverse direction so as to form an expanded tubular section extending around an unexpanded section of the tubular element, said wall having a resistance to radially outward bending and a resistance to stretching in circumferential direction. Said wall is provided with at least one of primary means for increasing the resistance to radially outward bending of the wall, and secondary means for reducing the resistance to stretching in circumferential direction of the wall.

L'invention concerne un procédé d'élargissement radial d'un élément tubulaire. Le procédé comprend l'opération consistant à amener la paroi de l'élément tubulaire à se plier radialement vers l'extérieur et dans une direction axialement inverse de façon à former une section tubulaire élargie s'étendant autour d'une section non élargie de l'élément tubulaire, ladite paroi ayant une résistance à une courbure radialement vers l'extérieur et une résistance à l'étirement dans une direction périphérique. Ladite paroi est dotée d'au moins l'un d'un moyen primaire de manière à augmenter la résistance à une courbure radialement vers l'extérieur de la paroi, et d'un second moyen pour réduire la résistance à l'étirement dans la direction périphérique de la paroi.

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