Method to improve downhole motor durability
US10626866B2 · kind B2 · utility
1Cited by
9References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2015 |
| Grant date | Apr 21, 2020 |
| Priority date | — |
| Expiry date | Sep 20, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2250/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Rotor and/or stator designs and methods thereof to improve progressive cavity motor or pump durability. In one or more implementations, the rotor may have a variable outer diameter or variable stiffness along an axial length thereof. The stator may similarly have a variable inner diameter or variable stiffness, which may compliment or diverge from the variable outer diameter or variable stiffness of the rotor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.