upoko whai wai
Kei te whai take te pūtahi kōwhaiwai hei whakangungu i te wāhi matua ki runga i ngā mahi kōwhaiwai ahianahia o nāianei, ka noho tēnei hei rautaki horoi me te whakatupu i te ara mō te hanga puhipuhi. Ko tēnei āhua whakahirahira o te tūtohu e hīkina nei i te hanganga whakapono me te hunga whakaritenga ki te whakamahi pai i te kōwhaiwai i waenganui i ngā whenua rorohiko. E toru ngā whatu kaweke i roto i te pūtahi kōwhaiwai, e whai ana i ngā pūtahi kaweke PDC (polycrystalline diamond compact) rānei ko ngā pūtahi koni whiti rānei, kua whakaritea ki te whakapai i te hiranga kōwhaiwai. I whakatakoto ia ki te whakamana i ngā paheko nui me ngā wāhanga wera, kei te whakahaere i te pai rawa i ngā wāhanga kōwhaiwai ahakoa ngā momo paheko. Kei roto i te pūtahi kōwhaiwai ngā rara ahydraulics matua, ka whakawhanake i te kuhu mai o ngā wai kōwhaiwai, he mea hohonu i ngā mata kaweke me te whakakore i ngā kaweke kōwhaiwai i roto i te rua puhipuhi. Ka whai ngā pūtahi kōwhaiwai ahianahia o nāianei i ngā tohu whakauru e tuku mai ana i ngā rara ariki i ngā tuhituhi kōwhaiwai, e kite ana i te wera, te paheko, me te whiuwhiu, ka whakaae ki ngā kaiwhakahaere ki te whakatau i ngā whakatau ahakoa i mua i te mahi kōwhaiwai. Kei te whakarite i tēnei hangahei ki ngā momo kōwhaiwai e rima, mai i te pūnaha pūnaha ki te kōwhaiwai whakatika, ka noho iti noa iho ki ngā kaupapa hanga puhipuhi rerekē. Kei roto i te whāriki ngā tūru e maha mō te kuhu wai me ngā pūpū whakarite e whakapai ana i te mahi horoi me te mahi hohonu i te wā.