Cable suspended pumping system
US4928771A · kind A · utility
30Cited by
19References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1989 |
| Grant date | May 29, 1990 |
| Priority date | — |
| Expiry date | Jul 25, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K11/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A centrifugal pump is lowered into a well and retrieved from the well by means of its power cable. The power cable has a single conductor. The pump has a downhole electrical motor which is three-phase. Single-phase AC power will be supplied from the surface down the conductor, with the return being the casing. A phase converter converts the single-phase AC power to three-phase AC power downhole for driving the pump motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.