Using higher order harmonics to determine acoustic impedance of material behind borehole casings
US9594177B2 · kind B2 · utility
3Cited by
13References
16Claims
0Family size
Assignee
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Key dates
| Filing date | May 27, 2014 |
| Grant date | Mar 14, 2017 |
| Priority date | — |
| Expiry date | May 18, 2035 |
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.