Both versions of the BHTV42 acoustic televiewer tool employ a rotating transducer
mounted at the lower extremity of the tool to send a highly focussed ultrasonic
pulse radially outwards towards the borehole wall up to 360 times per revolution,
the amplitude and travel time of which are measured on its return to the probe
after reflection at the borehole wall.
This information, combined with the data given by the tool’s onboard orientation
system, provides an extremely detailed and orientated acoustic image of the
A high-temperature variant, the BHTV-HT, can operate at up to 125°C.
Lim designs, produces and commercializes measuring instruments and solutions dedicated to drilling.