Method for determining the swelling clay content of cement mixtures by dielectric measurements
US5010301A · kind A · utility
13Cited by
11References
21Claims
0Family size
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Key dates
| Filing date | Aug 22, 1989 |
| Grant date | Apr 23, 1991 |
| Priority date | — |
| Expiry date | Aug 22, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/221
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining at wellsites the swelling-clay content of cement mixtures by high-frequency dielectric measurements including: grinding a cement mix sample to a size suitable for testing; washing the cement mix sample with a fluid having a water activity substantially less than water, which may contain a soluble cation; packing the washed cement mix sample into a sample cell suitable for dielectric measurement; measuring the dielectric constant at a preselected frequency; and comparing the measured dielectric constant of the cement mix sample to calibration curves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.