ELECTRIC SUBMERSIBLE PUMP WITH SPECIALIZED GEOMETRY FOR PUMPING VISCOUS CRUDE OIL

摘要

A centrifugal pump has impellers for pumping low flow, high viscous material s. The impellers have high exit angles greater than 30 degrees and preferably greater than 50 degrees. The impellers and diffusers have specific geometry that varies with viscosity. T he pump has zones of impellers and diffusers with the exit angles and geometry in the zones differing from the other zones. The exit angles decrease and geometry varies in a downstream directio n to account for a lower viscosity occurring due to heat being generated in the pump. One desig n employs small diameter impellers and high rotational speeds.