Apparatus comprising bistable structures for use in oil and...

E - Fixed Constructions – 21 – B

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E21B 41/00 (2006.01) E21B 17/20 (2006.01) E21B 43/10 (2006.01) F16L 55/165 (2006.01)

Patent

CA 2422800

Apparatus for use in a wellbore comprises (1) a first structure that comprises (a) at least one extendable member that can be reconfigured from a coiled form to an extended form, the member having a flattened transverse cross-section when coiled and a curved transverse cross-section when extended, (b) a downhole well tool attached to the extendable member, and (c) a housing in which the extendable member can be coiled; (2) a well mounting device for supporting the first structure from the wellbore or the surface of a well; and (3) means for reconfiguring the extendable, coilable member in a wellbore from the coiled form to the extended form. Preferably, the extendable member is reversibly configurable between the coiled form and the extended form. The extendable member may comprise a sensor, a conductor or an optic fibre and may form a sealing bore.

L'invention concerne un appareil à utiliser dans un puits de forage, qui comporte (1) une première structure comprenant a) au moins un élément extensible qui peut être restructuré d'une forme enroulée à une forme dépliée, l'élément comportant une section transversale aplatie lorsqu'il est enroulé et une section transversale courbe lorsqu'il est déplié, b) un outil de forage en profondeur fixé à l'élément extensible, et c) un logement dans lequel l'élément extensible peut être enroulé ; (2) un dispositif de montage de puits conçu pour supporter la première structure à partir du puits de forage ou la surface d'un puits ; et (3) un dispositif conçu pour restructurer l'élément extensible, enroulable dans un puits, de la forme enroulée à la forme dépliée. L'élément extensible est, de préférence, configurable de façon réversible entre la forme enroulée et la forme dépliée. L'élément extensible peut, de préférence, comporter un détecteur, un conducteur ou une fibre optique et peut former un sondage d'étanchéification.

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