High modulus liners in PDM stators with diameter reliefs compensating for rotor tilt
US12084975B2 · kind B2 · utility
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16References
20Claims
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Key dates
| Filing date | Oct 6, 2023 |
| Grant date | Sep 10, 2024 |
| Priority date | — |
| Expiry date | Oct 6, 2043 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2250/30
- 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 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.