Patent ID: 8141625
Filing Date: 2012-03-27
Classification: E21B,F04B

Abstract:
1. A submersible pumping system disposed in a well bore comprising: an elongated annular shroud having an upper end and a lower end; an annulus formed between the shroud and the well bore inner circumference; a multi-phase fluid booster pump having an inlet in fluid communication with fluid in the wellbore below the lower end of the shroud and a discharge in fluid communication with the annulus, so that multi-phase fluid discharged from the booster pump flows up the annulus to an inlet at or near the shroud and so that liquid in the multi-phase fluid separates out and flows into the shroud upper end as separated liquid; a liquid lift pump having an inlet within the shroud in fluid communication with the separated liquid and a discharge; and production tubing extending from the liquid lift pump discharge through the shroud entrance.