Device for providing fluid-tightness of a submersible motor and a motor incorporating said device
US4575315A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1983 |
| Grant date | Mar 11, 1986 |
| Priority date | — |
| Expiry date | Jun 1, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/132
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for ensuring fluid-tightness is applicable to a submersible motor for operation under conditions of total and permanent immersion, especially in oil wells and geothermal boreholes. The emergent end of the drive shaft of the motor is fitted with a rotary packing-gland. The motor casing is filled with oil which is circulated via an axial duct of the drive shaft, the impulse being produced by a disk pierced by radial ducts. A second circuit constituted by a system of ducts including radial ducts comes into contact with the packing-gland which is at overpressure with respect to the external medium. This results in a controlled leakage flow between the two portions of the packing-gland.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.