Multi-Edge Working Surfaces for Polycrystalline Diamond Cutting Elements
a cutting element and working surface technology, applied in the field of superhard polycrystalline material elements, can solve the problems of imposing a limit on the maximum useful operating temperature of the element, assembly is subjected to very high temperature and pressure, and the element may be subject to thermal degradation
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[0040]Referring now to FIGS. 1-4, the polycrystalline diamond and polycrystalline diamond-like (PCD) element 1010 of the present invention may be a preform cutting element 1010 for a fixed cutter rotary drill bit 1012 (as shown in FIG. 1). The bit body 1014 of the drill bit is formed with a plurality of blades 1016 extending generally outwardly away from the central longitudinal axis of rotation 1018 of the drill bit. Spaced apart side-by-side along the leading face 1020 of each blade is a plurality of the PCD cutting elements 1010 of the present invention.
[0041]Typically, the PCD cutting element 1010 has a body in the form of a circular tablet having a thin front facing table 1022 of diamond or diamond-like (PCD) superhard material, bonded in a high-pressure high-temperature press to a substrate 1024 of less hard material such as cemented tungsten carbide or other metallic material. The cutting element 1010 is preformed and then typically bonded on a generally cylindrical carrier 1...
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