pūrākau pdc whakatere
Te PDC (Polycrystalline Diamond Compact) drag bit he whakamahinga hou whai take i te hunga here kai tūhura, e whakakotahi ana i te whiuwhiutanga me te hanganga pūnaha matatini. Ko tēnei rautaki tūhura matatini e āhuatia ana ngā PDC cutters maha ki runga i te tinana o te bit, hei whakarite i te mahi pai rawa ki te tango i ngā momo whenua ki waho i te mahi kotahi o te whakapae. Ko te tinana o te bit e hanga nei i te aha, ko tēnā i te aha toa nui, ko tēnā i te aha pūnaha, e whakamana ana i te whakauru whakaheke me te whiuwhiutanga. E hanga ana ngā PDC drag bits i ngā whakaritenga roa me ngā taunga cutter hei whakapai i te mahi tūhura mō ngā momo whenua e rerekē ana. Kei ngā bits nei ngā hanganga hīrahi e whai ana i te whakatika me te whakawhitiwā i te wā o te mahi, e āhuatia ana ngā waiporoporo hei whakatere i te wai tūhura ki ngā wā e hiahia ana. E pai ana ēnei bits ki te whakamana i te paetaha tūhura me te kite i te whanaketanga pai rawa, inaianei i ngā whenua iti ki nui. Ko te hanganga hou ka whakauru i te tiaki gauge matua me ngā cutters tuarua e whakapai ana i te whiuwhiutanga me te roa o te bit. Ko ngā PDC drag bits o nehe ka whai take i ngā rahi e rerekē ana o ngā cutters me ngā pūnaha e rerekē ana, e mahi ana tahi ki te whakapai i te mahi tūhura, ahakoa te whiu me te whakamahere e rereke ana.
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