Patent ID: 11946472
Assignee: HALLIBURTON ENERGY SERVICES, INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  E | IPC E  F

Claim 17:
18. An electric submersible pump (ESP) assembly, comprising:
an electric motor having a first drive shaft;
a seal section coupled at an upstream end to a downstream end of the electric motor having a second drive shaft coupled to the first drive shaft;
a charge pump assembly disposed downstream of the seal section, wherein the charge pump assembly comprises
a third drive shaft coupled to the second drive shaft and
a fluid mover mechanically coupled to the third drive shaft and having a fluid inlet and a fluid outlet,
wherein the charge pump assembly is configured to flow substantially all of a fluid received by the first fluid mover out an outlet disposed at a downstream end of the charge pump assembly;

a gas separator assembly coupled at an upstream end to a downstream end of the charge pump assembly, having a fourth drive shaft coupled directly or indirectly to the third drive shaft and having an inlet in fluid communication with an outlet of the charge pump assembly, having a gas flow path and liquid flow path separator having a gas phase discharge port open to an exterior of the gas separator assembly and a liquid phase discharge port;
an inverted shroud coupled at an uphole end to the gas separator assembly or to the charge pump assembly and coupled at a downhole end to the ESP assembly downhole of the charge pump assembly; and
a production pump assembly coupled at an upstream end to a downstream end of the gas separator assembly and having an inlet in fluid communication with the liquid phase discharge port of the gas flow path and liquid flow path separator.