Determining properties of porous material by NMR
US10697910B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2016 |
| Grant date | Jun 30, 2020 |
| Priority date | — |
| Expiry date | Dec 29, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A porous material with liquid in the pores is examined by submerging the material in a bathing liquid, possibly a perfluorocarbon, which is immiscible with the liquid in the pores, is non-wetting towards the material, is immiscible with and differs in density from any liquid on the outside of the material, and does not contain a resonant element found in the bathing liquid. This bathing liquid displaces fluid from the surface of the porous material but not the liquid in the pores. Nuclear magnetic resonance signals from liquid in the pores give a measurement of pore volume. Volume of bathing liquid displaced by the porous material gives the bulk volume and porosity can be derived from these measurements. Sample preparation is minimal and a benchtop spectrometer can be used, making the method practical for examination of drill cuttings from a borehole while drilling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.