A fluid loss control system and method for controlling fluid...

E - Fixed Constructions – 21 – B

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E21B 33/124 (2006.01) E21B 34/06 (2006.01) E21B 43/14 (2006.01)

Patent

CA 2660839

A fluid loss control system having a loss control valve (16) and a plurality of zones including an isolation assembly (21) disposed in a wellbore and a string having a stinger (32) at a downholemost end thereof. The string is supportive of a moveable seal (40) at a selected position uphole of the stinger, the position being calculated to cause engagement of the seal with the isolation assembly and to position the moveable seal to facilitate fluid-flow around the seal when the stinger is engaged with a seal bore of one of the plurality of zones. A method for controlling fluid loss including isolating a fluid column uphole of a pressure seal spaced from the lower completion, opening a fluid loss control valve, stabbing a stinger into a seal bore of the lower completion, and positioning the seal to facilitate fluid flow therearound.

Système de contrôle de la perte de fluide comprenant une soupape de contrôle de perte (16) et une pluralité de zones incluant un ensemble d'isolation (21) disposé dans un puits de forage et une rame munie d'une élinde (32) au niveau de son extrémité la plus inférieure. La rame supporte un joint amovible (40) au niveau d'une position choisie en amont de l'élinde, la position étant calculée de manière à mettre le joint en prise avec l'ensemble d'isolation et à positionner le joint amovible de manière à faciliter l'écoulement de fluide autour du joint lorsque l'élinde est en prise avec un alésage d'étanchéité de l'une des zones parmi la pluralité de zones. Un procédé de contrôle de la perte de fluide comprend les étapes consistant à isoler une colonne de fluide en amont d'un joint d'étanchéité espacé de la complétion inférieure, ouvrir une soupape de contrôle de perte de fluide, guider une élinde dans un joint d'étanchéité de la complétion inférieure, et positionner le joint de manière à faciliter l'écoulement du fluide alentour.

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