Casing correction in non-magnetic casing by the measurement of the impedance of a transmitter or receiver
US8400159B2 · kind B2 · utility
5Cited by
3References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2009 |
| Grant date | Mar 19, 2013 |
| Priority date | — |
| Expiry date | Dec 16, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and related systems are described for determining the casing attenuation factor for various frequencies from measurements of the impedance of the transmitting or receiving coil of wire of. The compensation is based on two relationships. The first relationship is between one or more measured impedance parameters and the product of casing conductivity, casing thickness and electromagnetic frequency. The second relationship is between the casing correction factor and the product of casing conductivity, casing thickness and electromagnetic frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.