Acoustic Televiewer


The QL40ABI is the latest generation of acoustic televiewers based on 20 years of experience and market leadership.

The new system consists of a completely redesigned acoustic sensor and new electronics. The acoustic borehole imager records a 360° unwrapped and 3D images of the borehole wall.

The tool emits an ultrasonic beam towards the formation and records the amplitude and the travel time of the reflected signal. The amplitude record is representative of the impedance contrast between the rocks and fluid. The travel time is used to determine accurate borehole diameter data, which makes the tool ideal for borehole deformation description – stress field analysis and casing inspection.

A built in high precision orientation package incorporating a 3 axis fluxgate magnetometer and 3 accelerometers allows orientation of the images to a global reference and determination of the borehole’s azimuth and inclination. Sophisticated algorithms and real time processes are also implemented to extend the tool applications for casing thickness measurement, corrosion evaluation and measurement behind a PVC casing.

QL Stack Possibilities

  • QL40ABI-2G + QL40GR (Gamma): Water-well Monitoring, Contaminant Intrusion Studies
  • QL40ABI-2G + QL40GR (Gamma) + QL40ELOG (Resistivity): Identification of Aquifers
  • QL40ABI-2G + QL40GR (Gamma) + QL40ELOG (Resistivity)+ QL40CAL (Caliper): Hydrogeologist’s Tool, Groundwater exploration, assessment, and well completion


Ultrasonic Transducer

Temperature – Pressure

0-70°C (32-158°F)
200 bar (2900 psi)

Borehole diameter

0.05 – 0.50 m (2”– 20”) depending on borehole conditions

Diameter – Length

40 mm (1.6”) – 1.6 m (63”)


6.7 kg (14 lbs)


360° orientated acoustic image (amplitude & travel time)

Borehole azimuth and tilt

Tool internal temperature

Relative bearing

Magnetic field



Manufactured by Geotomographie GmbH

Technical Details

Generated wave types: SV
Signal frequencies: Up to 500 Hz (depending on geology and borehole distance)
Operational depth: Up to 100 m
Source length: 1015 mm
Source weight: 6 kg
Cable weight per metre: 377 g
Borehole diameter: 75-100 mm (or larger if spacers are used)
Clamping system: Infatable bladder
Depth indicator: Cable marking every 2 m
Connector: To impulse generator IPG800 or IPG5000
Storage: On drum
Switch box: Switch between two vertical shot directions

If you have a question OR REQUIRE A QUOTE, CONTACT us and one of our professional team members will assist you