Downhole gas separator

A downhole separator, comprising:

• a tubing string positioned in a wellbore, the tubing string having an upper end and a lower end;
• an outer tubular member having an upper end, a lower end, and a sidewall extending between the upper end and the lower end, the sidewall having at least one opening extending therethrough adjacent the upper end, the upper end of the first outer tubular member connected to the lower end of the tubing string;
• an inner tubular member having an upper end, a lower end, and a sidewall extending between the upper end and the lower end, the first inner tubular member positioned in the first outer tubular member to define an annulus between the outer tubular member and the inner tubular member, the upper end of the inner tubular member connected to the upper end of the outer tubular member so the annulus is fluidically sealed from the tubing string and the inner tubular member is in fluid communication with the tubing string, the lower end of the inner tubular member being open to define a lower open end;
• and
• a turbine having a hub rotatably connected to the inner tubular member below the at least one opening of the outer tubular member and at least one blade extending outward from the hub so the at least one blade is positioned in the annulus below the at least one opening of the outer tubular member, the at least one blade having a leading end and a trailing end, the leading end being positioned uphole of the trailing end so the leading end is positioned between the at least one opening of the outer tubular member and the trailing end of the at least one blade.