Kuita uye hupenyu hurefu hwetricone drill bits kwakakosha mumabasa ekuchera. Chinyorwa ichi chinoongorora kukosha kwekusanganisa uye kuenzanisa pakati pe roller cone uye koni yekuisa, uye kuti matekinoroji ekusunga zvisimbiso, akadai sesimbi yekuisa chisimbiso, anovandudza kushanda nekusimba kweTCI trione bits. Nekushandisa zvinhu zvine simba repamusoro-soro, kubatanidza kwakaringana, uye nzira dzekuisa chisimbiso, mabhiti aya anoderedza nguva, anowedzera kushanda zvakanaka, uye anoderedza mari yekugadzirisa, zvichiita kuti zvive chinhu chakakosha kuindasitiri yemafuta negasi.