pū kaiwhakarato dth me ngā bit
Nā ngā pū kaiwhakaroto (Down-the-Hole - DTH) me ngā pūtē e whai āheitanga ana i te tāngata whakamātau, ka whakamahi i ngā rautaki whakaroto e hāngai ana ki ngā whenua o te haere paihere, hanga, me ngā rōpū whakamātau. Nā ēnei raraunga matatika e whakakotahi ana i te pakipiki me te whakaheke i te take hei whakapakari i te whakawhiti i ngā tahuhu kō whatitiri. Ko ngā take o te rautaki ko ngā take matua e rua: ko te pū e whakapakari ana i te take pakipiki, ko te pūtē e tū tonu ana ki te mata o te kō whatitiri. E whakamahi ana ngā pū DTH i te hā mōkai hei whakahaere i te pihinga e pā ana ki te pūtē, e hanga ai te take whiu e hiahiatia nei mo te whakaroto. Ko ngā pūtē, e kitea ana i te tungsten carbide me te toko nui o te āporo, ko ngā patu pūnui e hanga ana hei whakapakari i te noho whakaroto me te whakatutuki i te wehe. Ko ngā rautaki hou o ngā pū DTH me ngā pūtē e whakauru ana i ngā take hirahira, pērā i ngā rīpo hā mōkai whakahirahira mo te whakamana i te wehe, ngā take patu pūnui whakahirahira mo te whakapakari i te take whakawhiti, me ngā momo matua whakatakoto huarahi mo te take whakatutuki ake. Kei te whiwhi pai ēnei rautaki i ngā mahi e hiahia ana ki ngā poitoi roa me ngā take torowāhi, inahea, ko te whakaroto pūnui, te whakaroto pūtake, me te whakamātau geothermal. Kei te whakapai ake te hunga whakamātau mō ngā pū DTH me ngā pūtē, kei te whakapakari ake ngā kaiwhakauru i ngā take me ngā momo hei whakapai i te mahi, te tūmanako, me te paihere moni.