Flexibility of downhole fluid analyzer pump module
US9255474B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 9, 2012 |
| Grant date | Feb 9, 2016 |
| Priority date | — |
| Expiry date | Feb 6, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/0875
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for pumping a downhole fluid includes a carrier configured to be conveyed through a borehole penetrating the earth and a pump disposed at the carrier and configured to pump the downhole fluid. A multi-phase electric motor is coupled to the pump and configured to receive multi-phase electrical energy from a power source in order to operate the pump. The multi-phase electrical motor includes multiple windings and a switch configured to connect the multiple windings in a configuration selected from a plurality of configurations. The plurality of configurations includes (i) a first configuration where one terminal of each winding of the multiple windings is uniquely connected to one terminal of another winding and (ii) a second configuration where one terminal of each winding of the multiple windings is commonly connected to one terminal of each of the other windings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.