Sonic logging tool including receiver and spacer structure
US7336562B1 · kind B1 · utility
17Cited by
16References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2000 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Nov 16, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/911
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A formation logging tool having a substantially continuous central mandrel with regularly spaced mass blocks disposed thereon, at least some of the mass blocks carrying sensors such as receivers. By adopting this structure, the tool can be made to behave as a mass-spring structure and its flexural and extensional behaviour controlled such that its dispersion curve does not extend into the dispersion curve of the formation to be logged. The structure can be applied to the whole of the logging tool or just to the receiver section and/or any spacer section between the receiver and the transmitter section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.