High pressure Symmetric Overburden Drilling Bit System
Payment:
TT, LC
Minimum Order:
1set
Delivery:
5-25days
Origin:
China
Packing:
Carton
Inspection:
-
Samples:
Charge
Shank: Top hammer or DTH hammer. Match Casing Tube: 76mm-2000mm. Concentric Drilling System is comprised of : A pilot bit, guide string, drill the center part of the hole, and attach to DTH hammer shank like DHD, QL, SD, Mission, BR, NUMA...or...
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