DOME-SHAPED POC CUTTERS DRILL HARDER ROCK EFFECTIVELY

D.P. Moran Smith International Inc. Houston Rock mechanics and sonic travel time log data indicate that bits with convex-shaped polycrystalline diamond compact (PDC) cutters can drill harder rock formations than comparable bits with flat PDC cutters. The Dome-shaped cutters have drilled carbonate formations with sonic travel times as small as 50 msec/ft, compared to the standard cutoff of 75 msec/ft for flat PDC cutters.1

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