Method of radially expanding a tubular element

Details Method of radially expanding a tubular element Method of radially expanding a tubular element

E - Fixed Constructions

21

B

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

Patent

CA 2669312

A method is provided 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 section of the tubular element extending around an unexpanded section of the tubular element, wherein said bending occurs in a bending zone of the wall, and wherein an annular space is defined between the unexpanded and expanded sections. At least one guide member is located in the annular space, each guide member being arranged to guide the wall during said bending so that the wall bends at an increased bending radius relative to bending of the wall in case the guide member is absent from the annular space.

L'invention concerne un procédé d'expansion radiale d'un élément tubulaire. Ce procédé comporte les étapes consistant à : courber la paroi de l'élément tubulaire radialement vers l'extérieur et dans le sens inverse du point de vue axial pour former une partie expansée de l'élément tubulaire qui se déploie autour d'une partie non expansée de celui-ci. La courbure est produite dans une zone de courbure de la paroi, et un espace annulaire est défini entre la partie expansée et la partie non expansée. Au moins un élément guide est placé dans l'espace annulaire, chaque élément guide étant placé de manière à guider la paroi pendant la formation de la courbure afin de courber la paroi selon un rayon de courbure accru par rapport à la courbure qui aurait été obtenue sans l'élément guide dans l'espace annulaire.

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