How much can casing deform before the probe cannot pass through?

Calculate the difference between the inside diameter of the casing and the outside diameter of the probe. For example, 85 mm casing has a 73 mm inside diameter and the probe body has an outside diameter of 24.5 mm, so the maximum allowed deformation would be 48.5 mm.

Complex Answer: This answer assumes a constant radius curve and describes tracking limits in terms of reading units.