I-PDC drill bits nozzles, enesakhiwo esilula, amandla aphezulu, ukumelana nokugqokwa okuphezulu, kanye nokumelana nomthelela ophezulu, izici ze-PDC bit nozzle zingobunye bobuchwepheshe obusha obuthathu bokubhola emhlabeni ngeminyaka yawo-1980.Ukusetshenziswa kwensimu kubonisa ukuthi ukubhola kwebhithi yedayimane kulungele ukwakheka okuthambile kuya kokumaphakathi ngenxa yezinzuzo zesevisi ende, isikhathi esincane sokuphumula, kanye nokubhoboza okungaguquki.