PDC Drill Bit
Kei te whakapākehia te PDC (Polycrystalline Diamond Compact) hei pū kōaro he mea hou ranei i te taurangi o te hanganga kōaro, e whakakotahi ana i te whai wawata me te pai ake o te mahi kutu. Ko tēnei taputapu matihiko kōaro e āhei ana ki ngā kutunga diamond e hanga i te mātauranga, ka whakatakoto ki runga i tētahi tinana tungsten carbide, e whakamana ana ki te whakarite i tētahi whakaaetanga kōaro pai me te whakaheke. Kei roto i te hanga o te pū PDC ngā momo kutu e maha ana, e whakarere ana i runga i tētahi rarangi matua hei whakatipu i te pai o te mahi kōaro i waenganui i ngā momo whenu e rerekē ana. Ki ia kutu diamond, kei te hangaia ki te whitiwhiti i ngā wehewehe urupa me ngā paetae nui, e mau tonu ana i ngā paraone tae ki te kotahi i mua i te whakatika atu o ngā mahi kōaro e roko tonu ana. Ko te tinana o te pū e whakariterite ana i ngā ara wai e haumaru ana i te whakawehenga me te whakapakari i ngā kaiwhakakore i te wā o ngā mahi kōaro. Nā reira ka nui ake ngā whakapono mo enei pū i waenganui i ngā mahi rapu ika me ngā mahi kōaro moni, nā te pai ake o o rātau āhuatanga. Ko te mātauranga mō ngā pū PDC e whakaae ana ki te torotoro ake i te wā, ko te oranga ake o te pū, me te whakatika ake i te whakahaere take i waenganui i ngā pū roller koni tawhito. Ka whai painga ēnei pū i te whakamahere i te tahuhu kōaro me te whakaputa i te pai o te mahi i waenganui i ngā whenu māku me ngā whenu kotahi-kī-tino-māku. Kei ngā pū e hanga ana i ngā huamahi huarahi matua, e whakatipu ana i te wāhi wai hei whakamana i te whakahauwai o ngā kaiwhakakore me te whakapakari i te wehewehe i ngā kōaro kōaro. Ko ngā pū PDC o nāianei e hanga ana i ngā pūnaha āhuareo matua, e whakamana ana i te whakawehi i te mana motuhake me te pai ake o te mahi kutu ki rōpū whā anō o te tinana pū.