Inflation element for a downhole tool, method and shaping...

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 71/00 (2006.01) B29C 49/00 (2006.01) B29C 55/22 (2006.01) E21B 33/127 (2006.01)

Patent

CA 2367637

A method for pre-disposing the expansion profile (68) in an expandable, elastomeric component of a downhole tool, includes the steps of (a) surrounding at least a portion of the length of an elastomeric component with a shaping tool (72, 74, 76) or vessel having an inner diameter that defines a profiled limit for pre-disposing the expansion profile in the component; (b) applying fluid under pressure (78) to the elastomeric component for expanding it into contact with the inner diameter of the shaping tool and creating a pre- disposed expansion profile in the component; and (c) reducing the pressure of the fluid for allowing the elastomeric component to return generally to its original shape. A downhole tool with an improved expandable, elastomeric component includes an expandable, elastomeric component having a pre-disposed expansion profile.

La présente invention concerne un procédé servant à prédisposer un gabarit d'expansion (68) dans un élément élastomère déployable d'un outil de fond. Ce procédé consiste : (a) à envelopper au moins une partie de la longueur d'un élément élastomère avec un outil (72, 74, 76) ou un récipient de formage dont le diamètre intérieur définit une limite profilée servant à prédisposer un gabarit d'expansion dans l'élément; (b) à appliquer un fluide sous pression (78) sur l'élément élastomère pour le gonfler et le mettre en contact avec le diamètre intérieur de l'outil de formage afin de créer un gabarit d'expansion prédisposé dans l'élément; et (c) à réduire la pression du fluide pour permettre à l'élément élastomère de reprendre généralement sa forme originale. L'invention concerne aussi un outil de fond muni d'un élément élastomère déployable amélioré, lequel définit un gabarit d'expansion prédisposé.

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