To receive strength evenly in the utility model adopts many broken at the same time, reduce the mechanical impact resistance, Slag discharge flow, Circumference of a broken, Centering well, make drill pipe casing follow up faster .meanwhile, extender open can transfer torque ,Uses the multi-axis suspension conjoined structure, solve the single concentric extender drops hidden trouble. This product has applied for national patent.

Some application for the reaming drilling tools:

Civil engineering projects: anchoring, goating, pipe and cable laying. Blast holes without soil removal.

Mineral prospecting: pilot holes for diamond drilling,sampling cuttings,overburden thickness surveys,water table studies.

Water wells: casting form surface down to bedrock,casting all through unstable formations,exclusion of upper water layers which are frequenty polluted.