Patent ID: 7854259
Filing Date: 2010-12-21
Classification: E21B

Abstract:
1. A rod guide for guiding a rotating rod string rotatable within a tubing string in a well for powering a progressive cavity pump to pump downhole fluids to the surface, the rod guide comprising: a rotor sleeve secured to the rod string, the rotor sleeve including a plurality of body portions each having an exterior surface of a reduced diameter, and a plurality of ridge portions each having a substantially cylindrical exterior surface of an enlarged diameter greater than the reduced diameter body portions and concentric with the rod string, each of the plurality of ridge portions is axially adjacent at least one reduced diameter body portion, each of the plurality of body portions and ridge portions fixed relative to the rod string; and a unitary stator sleeve positioned about the rotor sleeve, such that the rotor sleeve rotates relative to the stator sleeve, the stator sleeve including a substantially C-shaped body with an elongate slot between ends of the C-shaped body and a plurality of ribs each extending radially outward from the sleeve shaped body for engaging an inner wall of the tubing string, the stator sleeve having an interior surface defining a plurality of substantially cylindrical enlarged diameter portions each with an inner surface adjacent the exterior surface of a respective ridge portion and a plurality of reduced diameter portions each having a diameter less than the enlarged diameter stator portions for positioning adjacent a respective exterior surface of a reduced diameter body portion, thereby axially retaining the stator sleeve on the rotor sleeve.