Well control

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 34/10 (2006.01) E21B 21/08 (2006.01) E21B 21/10 (2006.01) E21B 34/08 (2006.01) E21B 21/00 (2006.01)

Patent

CA 2413745

A method of isolating a reservoir of production fluid in a formation comprises providing a pair of valves (14, 16) in a bore intersecting a production formation and in which the hydrostatic pressuer in the bore at the formation is normally lower than the formation pressure, and then ontrolling the valves (14, 16) from surface such that the valves (14, 16) will only move from a closed configuration to an open configuration on experiencing a predetermined differential pressure across the valves.

L'invention concerne un procédé d'isolation d'un réservoir de fluide de production dans une formation géologique, qui comporte les étapes consistant à : prévoir deux soupapes (14, 16) dans un forage coupant une formation de production, et dans lequel la pression hydrostatique au niveau de cette formation est normalement inférieure à la pression de formation ; et commander ensuite les soupapes (14, 16) depuis la surface de sorte qu'elles (14, 16) se déplacent uniquement dans le sens d'une configuration fermée vers une configuration ouverte lorsqu'une pression différentielle prédéterminée est appliquée sur celles-ci.

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