Overburden Tools

Additional Details

Dynadrill O-Dex systems for DTH hammers are designed to drill and case simultaneously through overburden, passing easily through large boulders, pulling lightweight, inexpensive casings behind them. On reaching the bedrock or required depth, the drillstring is removed easily from the hole, leaving the casings in place. Drilling into the bedrock can then be continued using a normal drill bit.
O-Dex type    Casing, Recom.    Min. Wall    Max. Drill bit    Reaming
     Size MM Max OD/Min. ID    Thickness mm    Diameter MM    Diameter MM
90    115/102    5    90    123
115    142/128    5    115    152
140    171/157    5    140    187
165    196/183    5,5    165    212
180    219/194    6,3    180    232
190    222/205    6,3    190    237
215    257/241    6,3    215    278
230    270/250    6,3    230    286
240    273/260    6,3    240    306
280    327/305    7,1    280    370