Downhole sealing for production tubing

Details Downhole sealing for production tubing Downhole sealing for production tubing

E - Fixed Constructions

21

B

E21B 43/10 (2006.01) E21B 29/00 (2006.01) E21B 33/128 (2006.01)

Patent

CA 2603100

A method of providing a downhole seal, such as a packer (12), in a drilled bore between inner tubing (11) and outer tubing (16) comprises: providing an intermediate tubing section (18) defining a seal arrangement for engaging with the inner tubing; and radially plastically deforming the intermediate tubing section downhole to form an annular extension (40a, 40b). The extension creates a sealing contact with the outer tubing (16).

Procédé de mise en place d'un joint de fond de trou, par exemple une garniture (12), dans un trou foré entre une colonne de production interne (11) et une colonne de production externe (16) qui comprend les étapes suivantes : l'insertion d'une section de colonne intermédiaire (18) pour former un ensemble d'étanchéité qui s'engage dans la colonne de production interne; et la déformation plastique radiale de la section intermédiaire pour former un renflement annulaire (40a, 40b). Ce renflement crée une surface d'étanchéité avec la colonne de production externe (16).

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