Downhole apparatus and technique to measure fluid resistivity
US10724368B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2017 |
| Grant date | Jul 28, 2020 |
| Priority date | — |
| Expiry date | Jul 12, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus are provided to measure fluid resistivity. The method includes driving a first winding at a first frequency to induce a first current in a fluid present in a flow line and then driving the first winding at a second frequency to induce a second current in the fluid present in the flow line. The method includes measuring the first and second currents and based on these results, determining a resistivity of the fluid. The apparatus includes an apparatus usable with a well that includes a flow line and a first winding to circumscribe the flow line. Also included is a transmitter to induce a number of currents in the flow line and a second winding to provide signals used to derive representations of excitation voltages and current magnitudes. The apparatus may further include an engine to determine a resistivity of the fluid in the flow line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.