Abstract: This internal inspection device is for determining a length and inner diameter of a tubular good. The internal inspection device includes a first positioning sensor, a second positioning sensor spaced axially from the first positioning sensor, a displacement sensor the displacement of the internal inspection device inside the tubular good between two positions sensed by the respective positioning sensors, the internal inspection device further including a electronic arranged to computing the length of the tubular good by adding a distance measured by the displacement sensor and a predetermined length.

Abstract: This drifting device for a tubular good includes a body, a means of propelling the body through the tubular good, and at least one attachment part for attaching a cylindrical drift mandrel to the body, wherein the attachment part is so configured to enable a degree of mobility of the cylindrical drift mandrel with respect to the body along a radial direction.