Patent ID: 7793717
Filing Date: 2010-09-14
Classification: E21B

Abstract:
1. A rod guide for use on a rotating rod string for powering a progressive cavity pump for pumping downhole fluids to the surface, the rod guide comprising: a rotor sleeve secured to the rod string, the rotor sleeve including a plurality of circumferentially spaced exterior surfaces each positioned substantially along an exterior of a cylinder having an axis aligned with an axis of the rod string; the rotor sleeve having two stop surfaces for limiting axial movement of a stator sleeve with respect to the rotor sleeve, each of the plurality of exterior surfaces extending axially between the stop surfaces, the rotor sleeve having two or more axially extending cavities each radially inward of and spaced circumferentially between two of the exterior surfaces of the rotor sleeve, each cavity extending between the stop surfaces and passing axially through the stop surfaces for fluid flow between the rotor sleeve and the stator sleeve; and the stator sleeve surrounding the rotor sleeve and having an interior surface for engaging the plurality of circumferentially spaced exterior surfaces of the rotor sleeve, and having a plurality of ribs extending outward from two or more outer cylindrical surface portions of the stator sleeve, such that fluid passes between the outer cylindrical surface portions and a production tubing and between the plurality of ribs.