Izingcezu ze-DTH zomoya omaphakathi nophansi

Izinzuzo zeHFDukubhoboza i-dive

I-drill bit yenziwe nge-alloy material, enempilo yesevisi ende futhi iphakeme kunemikhiqizo efanayo, futhi i-drill bit igxoba idwala ngomthelela kanye nokugunda. Izingxenye zokubhoboza ze-HFD zinokungagugi okuqinile futhi zifanele ukubhola endaweni ethambile futhi  eqinile(i-9-grade drillability of rock,hard rock drilling) ,  uma kuqhathaniswa ne-bit evamile, ikakhulukazi ekubholeni i-rock yebanga elingu-6-8  umphumela ubaluleke kakhulu.