Sensing liquids in oil well using electrochemical sensor
US6478950B1 · kind B1 · utility
20Cited by
11References
6Claims
0Family size
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Key dates
| Filing date | Oct 2, 2000 |
| Grant date | Nov 12, 2002 |
| Priority date | — |
| Expiry date | Oct 2, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor module for monitoring chemical properties of oil well fluids comprises at least one electrochemical sensor for a chemcal species, for example to detect pH and chloride ion concentration. A micro-porous barrier separates the electrochemical sensors from the environment of the module, the micro-porous barrier being of a material which is readily wetted by water. Periodic application of a current pulse between the barrier and a counter electrode enables fouling material to be removed from the micron barrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.