A new analytical solution for acoustic wave propagation in a borehole with an eccentric mandrel is used to compute wavenumbers and excitation vectors for several guided modes as a function of tool position. Parameters used in the examples are relevant for slow shear wave logging-while-drilling applications where a large steel mandrel is free to move laterally about the borehole during data acquisition. An interesting mode splitting phenomenon is featured.

This content is only available via PDF.
You can access this article if you purchase or spend a download.