Acoustical well logging method and apparatus
US4899844A · kind A · utility
26Cited by
12References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1989 |
| Grant date | Feb 13, 1990 |
| Priority date | — |
| Expiry date | Jan 23, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/911
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and tool for acoustically logging a wellbore where a transmitter simultaneously generates a plurality of separate acoustical signals having different frequencies, each effectively centered about a different resonance frequency, and then transmits the signals as a composite multi-frequency output signal having an effective broad frequency bandwidth that is capable of exciting pressure waves in a variety of different types of earthen formations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.