Verfahren zum Aufbringen einer verschleissfesten Schicht auf die Oberfläche eines Bohrmeissels

摘要

A method is disclosed comprising the steps of locating, on a surface of a downhole component, a plurality of thermally stable polycrystalline diamond (TSP) bearing elements (32), and then applying to the surface a settable facing material (34) which bonds to the surface between the bearing elements (32) and embraces the elements (32) to hold them in place. A method in which bearing elements (32) each comprising a body of TSP at least partly surrounded by a layer of less hard material are secured to the surface by welding or brazing part of the surface of each bearing element (32) which comprises said less hard material to said component is also described.