ALT - Model ABI40-2G -Acoustic Televiewer

Most common applications are

• Most common applications are
• Fracture detection and evaluation
• Detection of thin beds
• Determination of bedding dip
• Lithological interpretation
• Breakout analysis
• Monitoring of earth stress field
• Casing inspection
• High resolution caliper

The latest generation of ALT acoustic televiewer is a multi-echo system. This is achieved by digital recording of the reflected wave train. On line analysis of the acoustic data is made by a DSP (Digital Signal Processor). Sophisticated algorithms allow the system to detect the reflection from the acoustic window and to separate/classify all subsequent echoes. Minimum input of the operator is needed to enable:

• Automatic optimization of measurement window under all borehole conditions
• Automatic adaptation to variable borehole conditions
• Improvement of dynamic range of signal detection
• Very high travel time resolution
• Implementation of different operating mode

• Direct linear 14bit, 10mhz A/D conversion (automatic gain settings)
• Dynamic range of amplitude measurement is 84 db
• Calliper resolution is better than 0,1mm
• Orientation sensor which does not require field calibration
• Increased telemetry bandwidth (data transmission rate up to 500kbits depending on wireline), 166kbps typical on 300m four-conductors.
• Full wave form recording and real time display for quality control
• Multiecho mode to realize acoustic measurements through plastic pipes (require the plastic pipe to be centralized inside the borehole)
• Pipe-inspection mode to detect inner corrosion, outer corrosion, and wall thickness
• Automatic measurement window definition to gain optimum performance and variable borehole conditions

• diameter 40mm
• length 1.61m
• weight 6.7 kgs
• Max temp 70°c
• Max pressure 200 bar
• Borehole diameter 2” to 21” depending on mud conditions