Patent ID: 7241104
Filing Date: 2007-07-10
Classification: E21B,F04D

Abstract:
1. A well pump assembly for pumping a well fluid having a mixed flow of liquid and gas, comprising: a conditioning impeller having a hub with a bore for engaging a shaft for rotating the conditioning impeller with the shaft in a forward rotation direction; a stationary conditioning diffuser juxtaposed with the conditioning impeller to receive the well fluid from the impeller, the diffuser having a plurality of blades that incline from a downstream side to an upstream side of the diffuser in a rearward rotational direction; and a plurality of impeller vanes extending from the outer circumference of the hub of the conditioning impeller, each of the vanes inclining in the forward rotational direction from a downstream side of the impeller, defining a leading edge and a trailing edge, and wherein a radial line passing through an outer end of the leading edge of each of the vanes is rotationally forward of an inner end of the leading edge of each of the vanes for forcing liquid and gas radially inward and into the diffuser.