Bore isolation

E - Fixed Constructions – 21 – B

Patent

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Details

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

Patent

CA 2471488

A method of isolating a section of a drilled bore (10) containing a problem zone (12) comprises: providing a section of tubing (16); locating the tubing in the section of the bore; and expanding the tubing and forming at least an outer portion (20) of the tubing to conform to irregularities in the bore wall, to isolate the problem zone. The tubing may feature a formable outer section (20), and the expansion of the tubing may be achieved using a compliant rotary expander.

L'invention concerne un procédé qui sert à isoler une section d'un trou foré (10) contenant une zone problématique (12) et qui comprend les étapes suivantes : fourniture d'une section de tubulure (16) ; positionnement de la tubulure dans la section du trou ; expansion de la tubulure et formage d'au moins une partie extérieure (20) de la tubulure afin qu'elle s'adapte à des irrégularités dans la paroi du trou, et ce afin d'isoler la zone problématique. La tubulure peut présenter une section extérieure formable (20) et l'expansion de la tubulure peut être réalisée à l'aide d'un écarteur rotatif flexible.

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