Oil transport structure in an electric motor of an electric submersible pump (ESP) assembly
US11821430B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2021 |
| Grant date | Nov 21, 2023 |
| Priority date | — |
| Expiry date | Nov 17, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/5886
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electric submersible pump (ESP) assembly comprises a centrifugal pump assembly, a seal section and an electric motor comprising a drive shaft having a bore concentric with a longitudinal axis of the drive shaft. A fluid mover disposed within and coupled to the bore of the drive shaft is configured for urging lubricating oil upward in the bore. The fluid mover includes at least one helical flighting open in the middle. The electric motor may also have a bearing coupled to the drive shaft and a bushing that is retained by a housing or by stator structure of the electric motor. The bushing defining at least one fluid flow channel extending from an upper edge of the bushing to a lower edge of the bushing and a middle portion of the fluid flow channel open to the inside surface of the bushing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.