Expandable sand screen for use in a wellbore

Details Expandable sand screen for use in a wellbore Expandable sand screen for use in a wellbore

E - Fixed Constructions

21

B

E21B 43/08 (2006.01) E21B 43/10 (2006.01) E21B 43/26 (2006.01)

Patent

CA 2445783

The present invention provides apparatus and methods for expanding an expandable sand screen (210) in the wellbore and then fracturing the wellbore. In one aspect of the invention, an expandable sand screen includes a perforated inner pipe (240) and outer shroud (250). The outer shroud includes a plurality of longitudinal channels (260) that retain their general shape after the expandable sand screen is expanded. In the expanded state, the channels provide a fluid conduit along an area between the screen and the wall of the wellbore. In a subsequent fracturing operation, slurry travels along the conduits permitting communication of the fracturing slurry with hydrocarbon bearing formations.

La présente invention concerne un appareil et des procédés permettant d'étendre un tamis à sable extensible (210) à l'intérieur d'un puits de forage et de fracturer ensuite le puits de forage. Selon un aspect de l'invention, le tamis à sable extensible comprend une conduite interne perforée (240) et un blindage externe (250). Le blindage externe comprend une pluralité de canaux longitudinaux (260) qui retiennent leur forme générale après que le tamis à sable extensible a été étendu. A l'état étendu, les canaux constituent une canalisation pour liquide le long d'une zone située entre le tamis et la paroi du puits de forage. Lors d'une opération de fracturation ultérieure, le liquide circule le long des canalisations, permettant la communication du liquide de fracturation avec les formations abritant des hydrocarbures.

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