IDP manufactures a range of impregnated diamond matrices
with matrix layer metal bonds that range from hard, abrasion-resistant types to
soft, ductile types. In general, a hard, abrasion-resistant matrix would be
used to drill a soft, abrasive, unconsolidated formation while a soft, ductile
matrix would be used to drill an extremely hard, non-abrasive, consolidated
formation. The idea is to match the bit matrix hardness to the formation
hardness in order that the metal bond of the matrix layer will erode at a
controlled rate during normal drilling operation. This controlled erosion of
the matrix layer metal bond will in turn continually expose new layers of sharp
synthetic diamonds until the matrix layer of the bit crown is totally consumed.
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