4 Arms Caliper Tool

The 4CAL tool is a high-resolution 4 arm caliper designed for detailed borehole diameter and shape measurement in open-hole environments. With four independently articulated arms, 4CAL provides accurate and consistent measurements of borehole geometry, rugosity, washouts, keyseats, and deformation along the wellbore.

Applications

• Measuring the actual borehole diameter and its variations with depth

• Identifying washouts, breakouts, and keyseats in open-hole sections

• Evaluating wellbore stability and drilling quality

• Improving the interpretation accuracy of other logs (Density, Neutron, Sonic, Resistivity)

• Supporting accurate mud and cement volume calculations

• Assessing hole conditions prior to logging or completion operations

• Assisting in completion and perforation planning

• Detecting problematic intervals for cementing or remedial operations

Features & Benefits

• Four independently articulated caliper arms for accurate borehole geometry measurement

• High-resolution diameter recording with continuous depth coverage

• Robust mechanical design suitable for harsh downhole conditions

• Compatible with full logging tool strings in open-hole operations

• Reliable centralization and stable contact with the borehole wall

Specification