System Description
The schematic views of the inspection head identify three units. The first unit, MFL unit, based on the principle of magnetic flux leakage (MFL) determines metal loss, corrosion and wall thickness of the coiled tubing. The second unit, GEO unit, evaluates from the measurement of six outer diameters around the circumference the ovality (out of roundness) of the coiled tubing. The third unit, ODO unit, provides with 3 high-resolution odometer wheels results for CT depth and velocity. All units can be independently used based on the tube condition parameters to be monitored.

The ACIM system is equipped with totally over 75 sensors. In order to eliminate the human factor in evaluating measurements, ACIM performs automatic coiled tube integrity monitoring during operations. The data evaluation is done in real-time by the computer with use of well-known and proven algorithm gathered from the inspection of several thousand kilometers of pipeline.

The ACIM system is designed to operate during on- and offshore coiled tubing operations with a running speed from 0 ft/min up to 200 ft/min. Higher running speed can be handled by the system but will result in loss of resolution and accuracy.

Working with ultra high resolution MFL techniques, and complementing NDT measurements, ACIM detects and reports pipe imperfections outside the acceptance criteria automatically, giving operators enough time to react to the changed tube conditions.