REPAIRING SUBSTRATES OF POLYCRYSTALLINE DIAMOND CUTTERS

摘要

A method of repairing a wear or cutting element of a tool, the tool comprising a sintered polycrystalline diamond compact (PDC) structure bonded to a cemented metal carbide substrate, an example of which is a PDC cutter for an earth-boring drill. One example of the method comprises heating a spot within the damaged area of the substrate while introducing the inlay material to the spot, resulting in the substrate at the spot being heated and the inlay material melting onto the spot, without heating the substrate to the point of causing graphitization or rupture of diamond-to-diamond bonds of the diamond structure.

主权项

1. A method for repairing a downhole cutter with a substrate and diamond table comprising:
heating an inlay material with a high intensity beam; and introducing the heated inlay material onto a damaged portion of the substrate such that the inlay material is bonded to the damaged portion of the substrate.