Alternate-flow well tool having an internal shunt tube

Details Alternate-flow well tool having an internal shunt tube Alternate-flow well tool having an internal shunt tube

E - Fixed Constructions

21

B

E21B 43/08 (2006.01) E21B 43/04 (2006.01)

Patent

CA 2242447

A gravel-pack, well screen having an internal shunt tube positioned inside the screen for delivering gravel slurry to different levels within the well annulus during a gravel pack operation. The screen is comprised of one or more joints with each joint being comprised of a base pipe having a screen section therein. The internal shunt extends substantially throughout the length of the base pipe. Bolts, each having a passage therethrough, provide fluid passages between the exterior of the screen and the internal shunt near either end of the base pipe. During operation, slurry enters the internal shunt tube through the uppermost bolt and exits into the annulus through the passages in the lower bolts to distribute gravel to different levels of the annulus.

Filtre de puits constitué d'un filtre de gravier possédant un tube de dérivation intérieur placé dans le filtre afin d'acheminer une boue de gravier à différents niveaux dans l'espace annulaire pendant une opération de gravillonnage. Le filtre est composé d'un ou de plusieurs joints, et chaque joint comprend un tube de base muni d'une section de grillage. Le tube de dérivation intérieur s'étend essentiellement sur toute la longueur du tube de base. Des boulons comportant chacun un passage les traversant permettent aux fluides de circuler entre l'extérieur du grillage et le tube de dérivation intérieur près d'une extrémité ou l'autre du tube de base. Pendant le gravillonnage, la boue entre dans le tube de dérivation intérieur par le boulon le plus élevé et sort dans l'espace annulaire par les passages dans les boulons plus bas afin de répartir le gravier entre les différents niveaux de l'espace annulaire.

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