Method of instantaneous acoustic logging within a wellbore
US4718048A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1986 |
| Grant date | Jan 5, 1988 |
| Priority date | — |
| Expiry date | Jan 22, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/161
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method of instantaneous acoustic logging within a wellbore. The method is characterized in that it consists of locating on drill-pipe and ground recordings elementary recordings corresponding to one and the same depth level of the drilling tool, in grouping these elementary recordings in pairs, then in intercorrelating said recordings of the pairs so as to produce in respect of each pair a correlated signal which is representative of the acoustic energy produced and of the difference in travel times of the waves received on sensors from which the pair of recordings has been obtained. A particular application is for the determination of a seismic wellbore profile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.