Systems and Methods for Facilitating Oil Flow in Relation to Rotor Bearings

An electric submersible pump system comprising:

• a pump and a motor coupled to drive the pump,
• wherein the motor includes
• a stator;
• a rotor positioned coaxially within a bore through the stator;
• and
• a plurality of rotor bearings that support the rotor within the bore of the stator,
• wherein each bearing includes
• a collar, wherein the collar has a bore therethrough, wherein the collar has an outer periphery with a circumferential groove therein, and wherein the outer periphery further has an axial groove therein extending from a first axial face at a first end of the collar to a second axial face on an opposite end of the collar,
• a sleeve rotatably positioned within the bore of the collar and coaxially with the collar, and
• an interference ring positioned within the circumferential groove, the extending radially outward from the groove beyond the outer periphery, wherein the interference ring allows axial fluid in the axial groove to flow axially through the interference ring.