This paper introduces in-pipe inspection technologies enabling high-resolution digital measurements of tubular internal diameter (ID) and wall thickness (WT) for critical downhole applications. The resulting data sets support engineering decision-making by reducing reliance on nominal mill data and enabling joint-level selection for specific well functions. Typical applications include optimizing casing-joint placement for packer setting, selecting joints with higher measured WT for sections exposed to collapse or wear risk, and improving cement-volume estimations.
In-Pipe Inspection With Laser Measurements
The inspection system used for ID measurement is a self-propelled, in-pipe laser-based device equipped with rotating triangulation sensors. As the device traverses the joint, the rotating sensors generate a helical scan of the internal surface, resulting in a dense data set (typically on the order of 10⁶ measurement points per joint) (Fig.
