The Problem of Coring by Barrel Drilling on Rotary Drilling Rig 2024-10-10
The barrel drill is a special drilling tool. By cutting a ring groove, the core can be broken by a punch or a screw bit.Due to the different welding and cutting rings, the drill is divided into CB-I, CB-II, CB-III, CB-IV four kinds.Operation notes: when drilling is full, you can lift the drill, and
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