Method and apparatus for measuring electromagnetic properties of materials in borehole environs and simultaneously determining the quality of the measurements
US6060884A · kind A · utility
Inventors
Key dates
| Filing date | Feb 26, 1998 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Feb 26, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A wave propagation measurement-while-drilling system is used to measure selected formation and borehole parameters of interest and simultaneously provide indications of the quality of the selected measurements. One or more transmitter-receiver pairs are employed with the transmitter components operating at one or more frequencies. A model of the response characteristics of the borehole instrument is also employed. By using a redundant subset of the measurements, the parameters of interest are determined and an expected value of the remaining measurements is made. A comparison of the actual and expected values of the remaining measurements serves as a quality control check on the equipment and on the accuracy of the model.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.