Method and apparatus for one trip tubular expansion

Details Method and apparatus for one trip tubular expansion Method and apparatus for one trip tubular expansion

E - Fixed Constructions

21

B

E21B 43/10 (2006.01) E21B 4/18 (2006.01)

Patent

CA 2478373

A one trip system for expanding a tubular (176) that is solid or perforated or a screen is disclosed. The downhole assembly features a hydraulic anchor (10) that can be set, released and repositioned to repeat the process is used. The anchor (10) is small enough to go through the tubular (176) or screen after initial expansion. The anchor's maximum extension is designed to avoid overstressing the already expanded tubular or screen. An expansion tool (180) is hydraulically driven with the initial portion of the stroke delivering an enhanced force, the expansion tool (180) initially supports the tubular or liner but subsequently releases during the first stroke, after the tubular or screen is fully supported.

L'invention concerne un système d'expansion, en une seule passe, d'un élément tubulaire (176) solide, perforé ou crépiné. L'assemblage de fond comprend un ancrage hydraulique (10) qui peut être réglé, libéré et repositionné afin de répéter le procédé. L'ancrage (10) est assez petit pour passer à travers l'élément tubulaire (176) solide, ou crépiné, après l'expansion initiale. Le maximum d'extension de l'ancrage est conçu afin d'éviter des contraintes excessives sur l'élément tubulaire solide, ou crépiné, expansé. Un outil d'expansion (180) est entraîné par hydraulique, la partie initiale du coup délivrant une force augmentée. L'outil d'expansion (180) supporte l'élément tubulaire solide ou crépiné mais se libère ensuite, durant le premier coup, après que l'élément tubulaire solide ou crépiné soit complètement supporté.

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