Energy recovery in a wellbore

E - Fixed Constructions – 21 – B

Patent

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E21B 43/34 (2006.01) E21B 41/00 (2006.01)

Patent

CA 2322154

A process for the recovery of energy from a pressurised well stream containing a gas/liquid mixture, the process comprising: treating the well stream to a pre-separation process to separate it into gaseous and liquid phases, selecting appropriate proportions of said separated gaseous and liquid phases, recombining said selected proportions, and supplying the recombined mixture to the inlet of a rotary separation turbine, wherein said components are separated and energy is recovered from the flow by rotation of the turbine, said proportions of said gaseous and liquid phases being selected to produce an optimum mixture for supply to the rotary separation turbine.

Procédé de récupération d'énergie d'un flux de puits sous pression contenant un mélange gaz/liquide, qui consiste à traiter le flux de puits en le soumettant à un processus de pré-séparation pour le séparer en phases gazeuse et liquide, à sélectionner des proportions appropriées desdites phases gazeuse et liquide séparées, à recombiner lesdites proportions sélectionnées et à introduire le mélange recombiné dans l'orifice d'entrée d'une turbine de séparation rotative. Selon ledit procédé, les constituants sont séparés et l'énergie est récupérée à partir du flux par la rotation de la turbine, les proportions des phases gazeuse et liquide étant sélectionnées pour produire un mélange optimal à introduire dans la turbine de séparation rotative.

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