1.Rock Drilling Eccentric Overburden Casing System ndiyo nzira yanhasi inosarudzwa yekuchera mumamiriro ezvinhu akaoma pasi, somuenzaniso, apo pane matombo kana kusununguka kuumbwa.Eccentric casing drilling system ndiyo mhinduro ine hupfumi nekuti bapiro rayo rekuita zvehungwaru iro bhiti rinodzoserwa rinogona kushandiswa pagomba rinotevera.Izvi zvinonyanya kugadzirirwa makomba asina kudzika, sezvinowanzoitika mukuchera matsime emvura, matsime egeothermal, uye basa risina kudzika-piring.EDS yakanakira maburi mapfupi mukuremerwa kwakabatanidzwa.