Flexcompressional acoustic transducer
US4869349A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1988 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | Nov 3, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/912
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A flexcompressional acoustic transducer is set forth. In the preferred and illustrated embodiment, multiple parallel magnetostrictive rods provided with coils are coupled through a plate affixed to a radiating element. The radiating element in one embodiment is an elongate hollow cylinder which is closed at both ends. Vibrations from the magnetostrictive members cause the cylinder to radially flex, creating an omnidirectional acoustic wave transmitted radially outwardly, the apparatus being positioned in a sonde for connecting an acoustic wave front through the wall of the sonde for transmission into the surrounding wellbore fluids and the adjacent formations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.