utu o ngā upoko heke ngū
Ko te utu o ngā pūtē whakanui whenua he whakamataku nui i roto i te hī whenua, e āwhina ana i ēnei atu take katoa e paunga tonu ki te tūponotanga matua o ngā mahi whakanui. E rahi ana ngā taputapu hira nei, hei tā roller cone bits, diamond bits, me ngā PDC (Polycrystalline Diamond Compact) bits, kua hangaia ina ia mo ngā wāhanga whenua ā-matou me ngā hiahia whakanui ā-wheako. E rereke ana te horopaki utu i te mea ko te rahi o te pūtē, te whanonga matera, ngā tohu hangaanga whakamua, me te pai o te hanga. Kei ngā pūtē whakanui hirahira i te wā o nāianei, he momo hangaanga whakamua, he pai ake te whawhai ki te mate, me te whakatika haeretanga mō te pai rawa o te tahae. Ko te utu e whakaatu ana i te whai wānga, i ngā take pūkenga, me te wā e taea ai te whakamutu i ngā taiao korehea. Ka tuku ngā hangaenga i ēnei waahanga utu, mai i ngā whiringa kaikaihau e pai ana mo ngā tūmomo iti i te hiahia, ki ngā PDC rangatira e pai ana mo ngā wāhanga whakamaha. Me whai kiko anō te kōwhiringa utu, kāore i te utu tuatahi anake engari he mea hoki ngā take, pērā i te oranga o te pūtē, ngā ratitanga kawe, me te pai rawa o ngā mahi whakanui. He mea nui te mōhio i te hononga i waenganui i te utu me te pūkenga, hei āta whakaaetanga mō ngā mahi hī whenua kia mau ai ngā rautekau tūroa me ngā painga mahi mō te wā e hāngai ana.
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