Compacts for diamond drill and saw applications

Abstract

Abstract An improvement in drill bits and certain types of saw has been achieved through the use of diamond compact cutters which comprise polycrystalline diamond in the center of an annular metal carbide ring. In this design, the metal bonded carbide provides support for the polycrystalline diamond during use of the drill bit or saw helping to prevent cracking and chipping, thus prolonging its useful life. Fig. 2 shows a sectional view of a drill bit utilizing this concept. Drill bit crown 22, having central bore 23, is supported on one end of shaft 20, and the compact cutters 10 protrude from the crown. These cutters have a metal carbide support which is cup shaped to provide the further advantage that when the cutter is worm, there is no polycrystalline diamond remaining. Thus, all the useful diamond is expended in the drilling process.

Inventors

• 👤 Philippe Douglas St. Pierre

Bibliographic Details