Acoustic Televiewer

QL40 ABI 2G

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

Sensor

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”)

Weight

6.7 kg (14 lbs)

Measurements/Features

360° orientated acoustic image (amplitude & travel time)

Borehole azimuth and tilt

Tool internal temperature

Relative bearing

Magnetic field

Gravity

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