Iyo PDC drill bits nozzles, iyo inoratidzira chimiro chakareruka, simba rakakwirira, kupfeka kwepamusoro kuramba, uye kukwirira kupikisa, ndiwo maitiro ePDC bit nozzle ndeimwe yematekinoroji matatu matsva ekuchera munyika muma1980s.Kushandiswa kwemumunda kunoratidza kuti kuchera madhaimani kwakakodzera kune yakapfava kusvika pakati-yakaoma maumbirwo nekuda kwezvakanaka zvehupenyu hurefu hwesevhisi, kushomeka nguva, pamwe nekurambana kubhowa.