ngā upoko heke
He mea nui ake te whakamahi i ngā kōnāhu whai hau ki roto i te whenua me ngā mahi whawhai, e hanga ana i ngā mea tuatahi hei whakahapa i ngā tahuhu whenua me te tango i ngā momo minere taonga. Nā te hononga i ngā hanganga mōhiohio hou me ngā rara moeutoito i utaina ēnei whakatatū pai ki te whai i te huarahi pai rawa i ngā wāhi pūmau o raro i te whenua. Ko ngā kōnāhu whai hau o nāianei kei raro i ngā hanganga matataki e āhei ana ki te whakauru i ngā kawe tungsten carbide, ngā tahitanga whiuwhiu diamond, rānei ko ngā kiriwhai polycrystalline diamond compact (PDC), e āhei ana ki te whai i te paunga nui me te wehewehe i te wā i te whakahaere i ō rātau hapa me te wehenga i te wā i te whakahaere i ō rātau hapa. Kua hangaia ngā kōnāhu nei hei whakamana i ngā momo tahuhu whenua e rerekē ana, mai i ngā rākau maero iti ki ngā wharekura pūmau, me ngā patapata niho me ngā wheiwheinga kiriwhai e whakaū ana i ngā ratonga whakakopa ahakoa te itinga i te wehewehe. Kei raro i ēnei ngā tohu rerekē, inahoki ko ngā kōnāhu pororahi, kōnāhu torotoro, me ngā kōnāhu pū, kia hangaia inaianei hei whakamana i ngā wāhanga whawhai rerekē me ngā huringa. Ki te whai i te whakamahere mōhiohio i ngā kōnāhu whai hau, kua nui ake te whai hua i te whawhai, kua heke i te utu mahi, me te whai hua ake i ngā mahi whenua puta noa i te ao.