Multi-purpose downhole tool

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 47/06 (2006.01)

Patent

CA 2605441

A multi-purpose downhole tool comprising packers for isolating an interval of a downhole formation traversed by a borehole to form a packed-off interval annulus. The tool further comprises a reversible pump and more than one interval access port located between the packers. The ports provide fluid communication with fluid in the packed-off interval annulus. The tool further comprises a fluid conduit system and valves for controlling fluid communication between the interval access ports and the reversible pump. The multi-purpose tool is capable of pumping from the packed-off interval annulus as well as pumping into or "through" the packed-off interval annulus for determining formation pressures as well as introducing well enhancement fluids downhole.

Selon la présente invention, un outil de fond à usages multiples comprend des garnitures d'étanchéité servant à isoler un intervalle d'une formation de fond traversée par un puits afin de former un espace annulaire d'intervalle étanchéifié à l'aide de garnitures d'étanchéité. Cet outil comporte, aussi, une pompe réversible et plus d'un orifice d'accès d'intervalle situé entre lesdites garnitures. Les orifices permettent une communication fluidique avec un fluide de l'espace annulaire d'intervalle étanchéifié à l'aide de garnitures d'étanchéité. Ledit outil présente, également, un système de conduites de fluide et des soupapes conçues pour réguler la communication fluidique entre les orifices d'accès d'intervalle et la pompe réversible. L'outil à usages multiples permet de pomper à partir de l'espace annulaire d'intervalle étanchéifié au moyen de garnitures d'étanchéité, ainsi que dans ou "à travers" ledit espace annulaire, en vue de déterminer des pressions de formation et d'introduire au fond des fluides d'accroissement de la productivité de puits.

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