BORESCOPE DRILL PIPE AND LIGHT GUIDE SLEEVE

摘要

A borescope for inspecting the inside of bores such as drill pipe bores includes an elongate shaft to extend into the pipe. The shaft has an optical eye including an emitter to emit a light beam towards an inside surface of the bore and a receptor to receive light therefrom. The shaft may be rotated eccentrically about the bore axis so that the distance of the optical eye from a sector of the interior surface to be inspected is always less than the radius of the bore.