Downhole separator

A separator, comprising:

• a tubing string positioned in a wellbore, the tubing string having an upper end and a lower end;
• an inner tubular member having an upper end, a lower end, and a sidewall extending between the upper end and the lower end, the lower end of the inner tubular member having an opening, the upper end of the inner tubular member connected to the lower end of the tubing string;
• and
• an outer tubular member having an upper end, a lower end, and a sidewall extending between the upper end of the outer tubular member and the lower end of the outer tubular member, the outer tubular member positioned about at least a portion of the inner tubular member and connected to the inner tubular member to define an annulus between the inner tubular member and the outer tubular member, the upper end of outer tubular being free from the inner tubular member to define a circumferential inlet between the upper end of the outer tubular member and the inner tubular member, the circumferential inlet being in fluid communication with the lower open end of the inner tubular member,
• wherein reservoir fluid passes into the annulus formed between the inner tubular member and the outer tubular member via the circumferential inlet, the reservoir fluid guided downwardly to the opening of the inner tubular member so the fluid continues to travel up through the inner tubular member to the tubing string.