Tapered stators in positive displacement motors remediating effects of rotor tilt
US11421533B2 · kind B2 · utility
1Cited by
15References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2021 |
| Grant date | Aug 23, 2022 |
| Priority date | — |
| Expiry date | Apr 2, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2270/17
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Tapered stator designs are engineered in a positive displacement motor (PDM) power section to relieve stator stress concentrations at the lower (downhole) end of the power section in the presence of rotor tilt. A contoured stress relief (i.e. a taper) is provided in the stator to compensate for rotor tilt, where the taper is preferably more aggressive at the lower end of the stator near the bit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.