Anchor system for packers in well injection service

E - Fixed Constructions – 21 – B

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Details

E21B 33/124 (2006.01) E21B 43/16 (2006.01)

Patent

CA 2659454

An isolation assembly for downhole injection use is described that features at least one isolation device (2) mounted on a tubular (4) so that when injection fluid changes the tubular temperature which can cause a length change in the tubular, an anchor (3) for the tubular is provided to resist such a dimension change. The result is that the isolation device such as a packer can be left undamaged and retaining its sealing integrity. The anchor can be an inflatable or telescoping pistons (9) disposed to grab in open hole. When using telescoping pistons, their placement on the liner and their pattern can meet the desired locations where grip is enhanced. Use of cement inflatable anchors is contemplated as an alternative.

L'invention concerne un ensemble isolation pour une utilisation d'injection de fond de puits qui comprend au moins un dispositif d'isolation monté sur un dispositif tubulaire de sorte que lorsqu'un fluide d'injection change la température du dispositif tubulaire, ce qui peut provoquer un changement de longueur dans le dispositif tubulaire, un ancrage pour le dispositif tubulaire est placé pour résister à un tel changement de dimension. Le résultat est que le dispositif d'isolation tel qu'une garniture d'étanchéité n'est pas endommagé et conserver sa capacité d'étanchéité. L'ancrage peut être un piston gonflable ou des pistons télescopiques disposés pour s'accrocher dans un trou ouvert. En cas d'utilisation de pistons télescopiques, leur placement sur le chemisage et leur modèle peuvent correspondre aux emplacements souhaités où une prise est améliorée. L'utilisation d'ancrage gonflable en ciment est envisagée comme une alternative.

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