Expander for expanding a tubular element

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 43/10 (2006.01) B21D 31/04 (2006.01) B21D 39/08 (2006.01) B21D 39/20 (2006.01) E21B 23/08 (2006.01) E21B 29/10 (2006.01)

Patent

CA 2440742

An expander for radially expanding a tubular element by axial movement of the expander through the tubular element is provided. The expander (12) comprises an expander member having a front part (14) of a first cross-sectional size, a rear part (18) of a second cross-sectional size larger than the first cross- sectional size, and an intermediate part (16) arranged between said front part and rear part and having a cross-sectional size varying between said first and second cross-sectional sizes. The expander member is provided with fluid supply means (24) for supplying pressurised fluid to the inner surface of the tubular element at a location opposite said intermediate part when the expander member is arranged in the tubular element (1).

L'invention concerne un expanseur servant à élargir dans le sens radial un élément tubulaire, par un déplacement axial de l'expanseur à travers l'élément tubulaire. L'expanseur (12) comporte un élément d'expansion comprenant une partie avant (14) qui présente une première section ; une partie arrière (18) présentant une deuxième section, supérieure à la première ; et une partie intermédiaire (16), aménagée entre la partie avant et la partie arrière, qui présente une section pouvant varier entre les première et deuxième sections. L'élément d'expansion est équipé de moyens (24) d'apport de fluide destinés à amener un fluide sous pression vers la surface intérieure de l'élément tubulaire, en un lieu opposé à la partie intermédiaire quand cet élément d'expansion est placé dans l'élément tubulaire (1).

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