Expandable borehole liner

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 33/04 (2006.01) B21D 17/04 (2006.01) B21D 39/10 (2006.01) E21B 29/00 (2006.01) E21B 33/14 (2006.01) E21B 43/08 (2006.01) E21B 43/10 (2006.01)

Patent

CA 2471336

A method of lining a drilled bore comprises running an expandable first tubular (18) into a bore and locating part portion of the first tubular in an unlined section of the bore and another portion of the first tubular (14) overlapping a portion of an existing second tubular. The first tubular is secured (24) relative to the second tubular while retaining the provision of fluid outlets to permit displacement of fluid from an annulus between the first tubular and the bore wall. An expansion device (23) is then run through the first tubular to expand the first tubular to a larger diameter. Cement is then circulated into the annulus between the expanded first tubular and the bore wall. The fluid outlets are then closed.

Procédé de chemisage d'un trou foré consistant à déplacer un premier élément tubulaire extensible dans un trou et à placer une portion du premier élément tubulaire dans une section non revêtue du trou et une autre portion du premier élément tubulaire recouvrant une portion d'un second élément tubulaire existant. Le premier élément tubulaire est fixé par rapport au second élément tubulaire, tout en ménageant des ouvertures de fluide en vue de permettre le déplacement de fluide à partir d'un espace annulaire entre le premier élément tubulaire et la paroi du tube. Un dispositif expanseur est ensuite placé dans le premier élément tubulaire en vue d'élargir ce dernier à un plus grand diamètre. Du ciment est ensuite introduit dans l'espace annulaire entre le premier élément tubulaire expansé et la paroi du trou. Les ouvertures de fluide sont ensuite fermées.

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