Wellbore system including a conduit and an expandable device

E - Fixed Constructions – 21 – B

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E21B 23/01 (2006.01) E21B 23/02 (2006.01) E21B 33/12 (2006.01)

Patent

CA 2349188

A system is provided including a conduit having a longitudinal axis, and a device (30) which is radially expandable relative to the conduit from a retracted mode whereby the device is radially spaced from the conduit, to an expanded mode whereby the device is radially expanded against the conduit. The device includes a shape memory metal element transformable from a first shape to a second shape upon reaching a selected temperature, the shape memory metal element being arranged to expand the device from the retracted mode to the expanded mode upon transformation of the memory metal element from the first shape to the second shape.

L'invention concerne un système comprenant un conduit d'axe longitudinal, et un dispositif (30) radialement extensible par rapport au conduit, de manière à prendre, d'une position rétractée où le dispositif est espacé radialement du conduit, une position détendue, où le dispositif est détendu radialement contre le conduit. Le dispositif comporte un élément métallique à mémoire de forme, transformable d'une première forme vers une seconde forme lorsqu'il atteint une température sélectionnée, ledit élément métallique à mémoire de forme étant agencé pour détendre le dispositif d'une position rétractée vers une position détendue, par transformation de l'élément métallique à mémoire, de la première forme vers la seconde forme.

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