Rotary drilling rig when piling, the drill bit off the hole in the pile, how to fish ah?
The depths of the parts are steel material, jack with a solenoid (suction of 500 kg is enough), tied to a rope and power line down, should be able to smooth lifting. Let go of their depth should be clear, can also be judged according to the change of weight is sucked, if you can see or hear it is more convenient.
If more than fifteen meters, a thin rope tied down with the steel wire rope is fixed on the pull. If you don't deep human, not safe, do a salvage device on the line, is a piece of steel, cut into type L, L below the horizontal slightly upwards with a point of view, with the top of the vertical wire rope L, you can then put on the bit.
A winch, a lifter, uses a drill rod to wrap the wire rope into the drill bit, stabilize the drill rod, pull the wire rope, break the fuse, and tighten the small head on the drill bit. Lifting bit.
