Casing chubhu max ekunze dhayamita 115-350mm ODEX drill bits eccentric overburden casing system yekuchera matsime emvura yakadzika.

Matanho ekushanda:1.Iyo overburden drilling system ine DTH nyundo, eccentric yakagadzirirwa reming uye pilot bit, dhizaini mudziyo uye casing.Iyo eccentric bit reming inotenderera kunze kuti iboora gomba hombe kuitira kuti casing yesimbi ipinde mugomba panguva imwe chete.Guruva rematombo rinopeperetswa richibuda mugomba nepapombi yecasing.2.Mushure mekuchera kusvika pakadzika chaihwo, mugadziri anodzoserwa kumashure nekudzoreredza zvishoma kwainotenderera kana nekudhonza chishandiso, uye ndiyo nguva yekuti maturusi ekuchera anogona kudhonzwa.3.Kudhonzera chivharo uye uku uchizadza kongiri kana zvimwe zvinhu pasi pegomba.4.Kushandisa zvakajairwa kuchera gomba kunogona kuenderera mberi nekuboora gomba, nepo DTH bit ichigona kudhiraivha kusvika pakadzika hunodiwa.