Choosing between an Acoustic and Optical Televiewer comes down to your borehole conditions and what you need from the data. A practical guide to picking the right tool — and when to run both.

Terrascan has just added a Full Waveform Sonic (FWS) tool to its arsenal. It is used extensively in groundwater and geotechnical projects to calculate compressional 'P' and shear 'S' wave velocities in open boreholes. The FWS tool is instrumental in determining the rock strength variation down a borehole. In addition, we have also upgraded our winch to 950m, greatly extending the capability of our 4x4 logging unit and televiewers. It sends a high energy source wave through th