Abstract: A segmented hardfaced collar for tool joints is disclosed. In the preferred and illustrated embodiment, a wear resistant tool joint suitably dressed for use is disclosed. It is formed at externally upset box tool joints. The apparatus comprises, in the preferred embodiment, a pair of semicircular segments which fully encircle and are joined to the lower portions of the box tool joint. The segments are perforated with a plurality of holes, and cylindrical inserts are pressed into them made of hard material to extend the life of the tool joint. The several inserts are distributed around the semicircular segments and are held in position by means of a friction fit or brazing material applied to the joint.

Abstract: An improved stabilizer is disclosed. In the preferred and illustrated embodiment, a built-up spline is disclosed. The spline is made by drilling a set of holes in a blank of relatively soft metal and inserting hardened inserts into the metal. Typical inserts are made of tungsten carbide. They may be brazed on the back side to firmly affix the inserts in holes drilled in the metal strip. The metal strip is welded to the stabilizer body. It has the advantage in that it can be refaced or built up after wear.