Using higher order harmonics to determine acoustic impedance of material behind borehole casings
US8767506B2 · kind B2 · utility
4Cited by
11References
12Claims
0Family size
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Key dates
| Filing date | Dec 20, 2011 |
| Grant date | Jul 1, 2014 |
| Priority date | — |
| Expiry date | Jun 28, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/50
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An acoustic logging tool emits a wideband acoustic pulse toward an inside surface of a borehole casing and an acoustic response is received. The acoustic response is analyzed at one or more higher order harmonics of the thickness mode resonance of the casing to determine the acoustic impedance of the material behind the casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.