Patent ID: 7270186
Filing Date: 2007-09-18
Classification: F04B,F04D

Abstract:
1. A downhole well pump system comprising: a pump housing having an engine end and a pump end; an engine disposed within said engine end of said housing, said engine comprising at least one engine-end blade fixably connected to a shaft, said shaft being vertically disposed within said housing and said at least one engine-end blade being designed to cause said shaft to rotate when a pressurized gas flows across said at least one engine-end blade; a pump disposed within said pump end of said housing, said pump comprising at least one pump-end blade fixably connected to said shaft, said at least one pump-end blade being designed to lift well fluids vertically upon rotation of said shaft; and a string of tubing disposed within a wellbore and attached to said housing for providing a conduit through which said pressurized gas is supplied to said engine, said tubing string having an outer diameter and an inner diameter, wherein said pump housing has an outer diameter greater that the inner diameter of said tubing string.