I-DTH drilling ibizwa ngokuthi "Down The Hole" drilling. Yindlela eyodwa yokubhakula amaphoyisa emhlabeni. Le ndlela iyasebenzisa i-drill ephakanyisiwe ebusweni besihlangu eside. I-drill isebenza kahle futhi isebenza kakhulu. Isetyenziswa kuzo zonke izinto, njengokubhakula amathambo, ukwakha amarhoad, futhi ukuthola amanzi emizimba yamaphoyisa. Izinhlanganisana njenge-Mazellion ziyakhiwa izinkampani ezinconywa ukusebenzisa i-DTH drilling. Le ndlela isebenzisa kakhulu ngoba isebenza kakhulu futhi inokusinda isikhathi nezimali.
Ukudrilla kwe-DTH kusenza imisebenzi yokubakha kufanele kusukela kanye nokulula. Uma ababakhi badinga ukwenza izihlangozelo zokubakha okanye izihlangozelo zokuphatha, bangasebenzisa ukudrilla kwe-DTH ukuze kwenziwe ngokukhawuleza. Udrill ulapha emhlabeni futhi ulahla amathambo nesandla ngokuvamile. Lokhu kusho ukuthi abasebenzi abangakwazi ukugcina isikhathi eside ekudlaleni ngohando noma ukusebenzisa izimithi eziningi ezinamandla angafanele. Isibonelo, uma umphakeli wokubakha uyabakha indlu entsha, ukusebenzisa ukudrilla kwe-DTH kusiza kubo ukwenza izihlangozelo zokubakha izihlangozelo zokubakha ngokukhawuleza kunezindlela zezinye. Lokhu kukhawuleza kusenza ukuthi kubuyiselwa imali ngoba kunciphisa isikhathi abasebenzi basenxa kulesi sikhulu. Ngapandle kwalokho, abasebenzi abaningi kuphela abadingeka ngelinye isikhathi, okunciphisa izindlela zokubhatala.