Moineau motor with conduits through the stator
US5171139A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 1991 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Nov 26, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49229
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A progressive cavity drilling motor is disclosed with a multiplicity of helically formed conduits positioned in a resilient stator. The conduits are placed between an inner wall of a motor casing and a helically formed through hole formed by the stator. The conduits are located in parallel with each of the semi circular lobes thereby reducing the thickness of the elastomer in the lobe area resulting in a reduction of the hysteresis in the elastomer that is caused by cyclic stress reversals of the stator during motor operation. The conduits additionally divert a portion of the drilling fluid through the stator conducting heat therefrom. In addition, one or more of the conduits may be utilized as a communication channel therethrough for measurement while drilling capabilities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.