Method of expanding a tubular element in a wellbore

Details Method of expanding a tubular element in a wellbore Method of expanding a tubular element in a wellbore

E - Fixed Constructions

21

B

E21B 43/10 (2006.01) E21B 7/20 (2006.01) F16L 55/165 (2006.01)

Patent

CA 2706279

A method is provided of radially expanding a tubular element in a wellbore formed in an earth formation, the method comprising arranging the tubular element in the wellbore whereby a lower end portion of the wall of the tubular element extends radially outward and in axially reverse direction so as to form an expanded tubular section extending around a remaining tubular section of the tubular element, whereby an annular space is defined between said expanded and remaining tubular sections. The expanded tubular section is axially extended by moving the remaining tubular section downward relative to the expanded tubular section so that said lower end portion of the wall bends radially outward and in axially reverse direction. A tube is positioned in the annular space so that the tube extends substantially concentrically with the expanded tubular section, wherein the tube is arranged to support at least one of the remaining tubular section and the expanded tubular section

L'invention concerne un procédé d'expansion radiale d'un élément tubulaire dans un forage de puits ménagé dans une formation terreuse, le procédé comprenant l'agencement de l'élément tubulaire dans le forage de puits, grâce à quoi une partie d'extrémité inférieure de la paroi de l'élément tubulaire s'étend radialement vers l'extérieur et dans un sens axialement inverse de façon à former une section tubulaire expansée s'étendant autour d'une section tubulaire restante de l'élément tubulaire. La section tubulaire expansée s'étend axialement en déplaçant la section tubulaire restante vers le bas par rapport à la section tubulaire expansée de telle sorte que ladite partie d'extrémité inférieure de la paroi se cintre radialement vers l'extérieur et dans un sens axialement inverse. Un tube est placé dans l'espace annulaire de telle sorte que le tube s'étend sensiblement de manière concentrique avec la section tubulaire expansée, le tube étant disposé pour supporter au moins l'une de la section tubulaire restante et de la section tubulaire expansée.

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