pūrākau pdc mo te koha
Nō te whiwhinga PDC (Polycrystalline Diamond Compact) he tātai hoko e whakamana ana i ngā hanganga herehere whakatūru rēhita hei whakamahi mō ētahi atu matatika mahi. Ko ēnei tātai hanga kuhu e whai ake nei i ngā tohu herehere kimihau e whakauru ana ki te tinana tungsten carbide, ka hangaia hei whakapakari i te noho i roto i ngā wāhi kuhu nui. Ka hangaia ngā tātai i te hunga herehere o te ao hei whakatakoto pai rawa i ngā tohu me te pai o te pūnaha hīrau. E ai ki ngā momo rahi e taea ana, e whai mai ana i te 4 ki te 28 pouaka i te uiui, ka hangaia ngā tātai kia taea ai ngā hiahia kuhu rerekē mō ngā whenua rerekē. Hei tā ngā tātai PDC, kei raro i ngā whakawai hanga paihere, pērā i te whakatika i te āhua o ngā tohu, te whakarite paihere o ngā mata, me ngā momo hanga matua e whai ana ki te whakapai i te noho kuhu me te roa o te tātai. Ka hangaia hei whakamahere pai i te haerenga i te mahi, hei whakaiti i ngā whiuwheowheo, me te whakamana paihere i te tahuri o te huringa. Kei raro i ngā tohu whakaaeae tōmua e whai ana ki te whakatika pai i te whakawhiti i te kuhu me te whakamahana i te mahi, me te whakatūpū pai o te tataki ka taea e ia te whakarite i ngā paetūnga nui me ngā waehu o te waimārama. Nō reira, kei te whai take ēnei tātai hei whakamahi i ngā kaupapa rangahau oi me te raranga, me ngā kaupapa kuhu geothermal, kei reira tonu ka whakamana i te rahi o te kuhu me te roa o te tātai.