Patent ID: 6896300
Filing Date: 2005-05-24
Classification: E21B,F16L

Abstract:
1. A refacing indicator for a tool joint of the type having a pin and a box each defining an outer surface, each of the pin and the box having mating threads the refacing indicator comprising: a makeup plate formed on each of the pin and the box, each makeup plate defining an annular shoulder intended for makeup with the annular shoulder of the other makeup plate and having a makeup surface set in from the outer surface and axially spaced from a reference surface on the respective pin and the box, each reference surface on the respective pin and box being radially outward of a respective makeup surface and generally perpendicular to an axis of the tool joint, so that when the pin and box are made up, the abutting makeup surfaces are in compression and the reference surfaces define a measurable gap between the pin and box observable from an exterior of the made-up tool joint.