HYDRODYNAMIC BEARING RUNNER FOR USE IN TILTING PAD THRUST BEARING ASSEMBLIES FOR ELECTRIC SUBMERSIBLE PUMPS

摘要

An electrical submersible pump runner having a core layer and a wear layeraffixed to the core layer. One embodiment of the invention provides anelectrical submersible pump that includes a motor section and a centrifugalpump section. A seal section and rotary gas separator may also be included.The pump is powered by an electric cable that connects the pump. Located in abore hole, to a power source on the surface. A thrust runner coated with awear layer (e.g., polymer) is provided in the motor and/or seal section toreduce bearing temperature, provide longer bearing life, reduce costs, andfacilitate overhaul. The runner may also function as a rotating up-thrustbearing when the runner is coated with a wear layer on one side that is formedwith a bearing geometry. In this case, the up-thrust bearing may be eliminated.