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) B21D 17/04 (2006.01) B21D 39/04 (2006.01) B21D 39/10 (2006.01) E21B 29/00 (2006.01) E21B 29/10 (2006.01) E21B 33/138 (2006.01) E21B 33/16 (2006.01)

Patent

CA 2356131

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).

Cette invention concerne une méthode de mise en place d'un joint de fond de trou, par exemple une garniture (12), dans un trou foré entre un tube intérieur (11) et un tube extérieur (16). Pour cette méthode, on utilise une section de tube intermédiaire (18) définissant un ensemble d'étanchéité qui s'engage dans le tube intérieur et qui par déformation plastique radiale, forme un renflement annulaire (40a, 40b). Ce renflement crée une surface jointive avec le tube extérieur (16).

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