Turbine for driving a generator in a drill string
US8585349B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 9, 2009 |
| Grant date | Nov 19, 2013 |
| Priority date | — |
| Expiry date | Sep 18, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/1823
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention is directed to a turbine with a housing mountable in a drill string and having an inlet opening and an outlet opening for a fluid conveyed through the drill string, and with an impeller arranged in the housing and adapted to be impinged upon by the fluid flowing into the housing, wherein the impeller is axially movably mounted and yieldably supported against the afflux direction in such a way that the supporting force of the yielding support increases as the axial movement of the impeller increases. To reduce the dependence of the turbine rotational frequency and turbine performance on the feed rate and to avoid overloading of the generator, the housing includes in the range of movement of the impeller a frontal first housing section of smaller inner diameter as seen in the afflux direction and a rear second housing section of larger inner diameter as seen in the afflux direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.