Apparatus and methods for measuring the refractive index of a fluid
US11085877B2 · kind B2 · utility
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11References
12Claims
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Key dates
| Filing date | Sep 8, 2017 |
| Grant date | Aug 10, 2021 |
| Priority date | — |
| Expiry date | Oct 19, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/1755
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and apparatus are provided for determining the refractive index of a downhole fluid. Two unalike crystals are provided having faces in contact with fluid in the fluid flow line of a borehole tool. The crystals are chosen to have different refractive indices and/or different angles of incidence, but to provide total internal reflection for light that is directed through the crystals to the crystal/fluid interface. The measured attenuations for each crystal are used in conjunction with the known refractive indices and angles of incidence of said crystals to determine the refractive index of the fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.