Electric submersible pump with specialized geometry for pumping viscous crude oil
US7409997B2 · kind B2 · utility
10Cited by
32References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2004 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Jun 11, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D13/10
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A centrifugal pump has impellers for pumping low flow, high viscous materials. 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. The 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 direction to account for a lower viscosity occurring due to heat being generated in the pump. One design employs small diameter impellers and high rotational speeds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.