High viscosity pumping system and method of using same
AssigneeAlkhorayef Petroleum Company
InventorsWoon Yung Lee, Ying Xue, Yun Cai
Life of this patent
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Abstract
An electrical submersible pump (ESP) for use in a high viscosity pumping system includes a pump shaft, at least one rotating impeller including an impeller hub and one or more impeller vanes projecting from the impeller hub. Each of the one or more impeller vanes includes an impeller vane edge, and at least one stationary diffuser positioned below the at least one rotating impeller. A diffuser includes a diffuser hub and a diffuser shroud including a diffuser shroud surface. The impeller vane edge and the diffuser shroud surface are separated only by a clearance gap.
Claims19
An electrical submersible pump (ESP) for use in a pumping system, the ESP comprising:
- a pump shaft;
- at least one rotating impeller comprising an impeller hub and one or more impeller vanes projecting from the impeller hub, each of the one or more impeller vanes comprising an impeller vane edge;
- and
- at least one stationary diffuser positioned upstream the at least one rotating impeller, the diffuser comprising a diffuser hub and a diffuser shroud comprising a diffuser shroud surface,
- wherein the impeller vane edge and the diffuser shroud surface are separated only by a clearance gap, and
- wherein the clearance gap is calculated as a function of the impeller hub, a position of the diffuser shroud surface, an angle of the diffuser shroud, and a position of the impeller vane edge.
An electrical submersible pump (ESP) for use in a pumping system, the ESP comprising:
- a plurality of impellers, each comprising an impeller hub and one or more impeller vanes projecting from the impeller hub, each of the one or more impeller vanes comprising an impeller vane edge;
- and
- a plurality of diffusers positioned upstream and downstream one of the plurality of impellers, each of the plurality of diffusers comprising a diffuser hub and a diffuser shroud comprising a diffuser shroud surface,
- wherein the plurality of impellers are open impellers, and each of the impeller vane edges of the plurality of impellers are separated from each of the diffuser shroud surfaces of the plurality of diffusers only by a clearance gap, and
- wherein each clearance gap is calculated as a function of a length of one of the impeller hubs, a position of one of the diffuser shroud surfaces, an angle of one of the diffuser shrouds, and a position of one of the impeller vane edges.
Dependencies are inferred from the claim text.