𝐂𝐚𝐥𝐢𝐩𝐞𝐫 𝐥𝐨𝐠𝐠𝐢𝐧𝐠: The caliper probe, a simple mechanical device, whose main functionality is to measure the internal diameter of a borehole or casing string within a borehole. Another purpose of a caliper arm is to push a section of a probe against the side of the borehole (for example density logging), known as sidewalling. 𝐀𝐝𝐝𝐢𝐭𝐢𝐨𝐧𝐚𝐥 𝐝𝐚𝐭𝐚 𝐦𝐞𝐚𝐬𝐮𝐫𝐞𝐝 𝐟𝐫𝐨𝐦 𝐚 𝐜𝐚𝐥𝐢𝐩𝐞𝐫 𝐥𝐨𝐠 𝐢𝐧𝐜𝐥𝐮𝐝𝐞𝐬: 🔹The roughness or rugosity of the borehole wall. Soft rocks