Multi-arm or multi-finger caliper logs have been used for decades to create a detailed quantitative profile of the inside of a completion, enabling operators to identify a wide range of integrity problems through the life of the well, such as mineral deposition, corrosion, wear, or mechanical deformation.
Our MAC™ multi-arm caliper tools are designed in diameters that allow them to pass through most completion restrictions. Probe currently offers 40, and 60-finger configurations, and a new-generation 24-finger configuration is anticipated for commercial release in early 2019. The new generation MAC24 incorporates a series of design improvements over previous tools, including highly stable DVRT sensors and the ability to log in real time with surface read-out for electric wireline applications, or in memory mode with battery power for slickline and coiled tubing applications.
As a MAC tool logs the internal profile of the completion, it converts the mechanical movement of each arm—commonly referred to as a “finger”—to an individual electrical signal. The signal from each arm is then converted into a calibrated radial measurement that can be presented in various formats, including individual arm measurements, a casing cross-sectional diagram or a 3-dimensional, color-enhanced visualization. Directional data is acquired simultaneously and can also be included in the log presentation. MAC tool data can be acquired on a standard Warrior™ cased-hole logging panel to offer real-time plotting of downhole data, high-speed data transmission, data processing, and vivid imaging of the inspected casing.