Apparatus and methods for radially expanding a tubular member

E - Fixed Constructions – 21 – B

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E21B 29/08 (2006.01) B21D 39/08 (2006.01) E21B 23/01 (2006.01) E21B 43/10 (2006.01)

Patent

CA 2443852

Radially expanding a tubular such as a liner or casing, especially in a downward direction. The apparatus includes at least one driver device such as a piston that is typically fluid-actuated, and an expander device is attached to the or each driver device. Actuation of the or each driver device causes movement of the expander device to expand the tubular. One or more anchoring devices, which may be radially offset, are used to substantially prevent the tubular from moving during expansion thereof.

L'invention concerne l'expansion d'un élément tubulaire (12), tel qu'un chemisage ou un tubage, spécialement en direction vers le bas. L'appareil comprend au moins un dispositif d'entraînement (20, 22) tel qu'un piston actionné de façon classique par un fluide, et un dispositif d'expansion (14) fixé au dispositif d'entraînement (20, 22). La mise en marche du dispositif d'entraînement(20, 22) provoque l'expansion de l'élément tubulaire (12) par déplacement du dispositif d'expansion (14). Un ou plusieurs dispositifs d'ancrage (36, 40), qui peuvent être décalés radialement, sont utilisés afin d'empêcher sensiblement un déplacement de l'élément tubulaire (12) lors de son expansion.

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