Construction steps of rotary drilling rig
The soil sand in the dump in earthmoving vehicles or on the ground to shut the valve back drill, rotary drilling rig rotary drilling rig rotary lock body, put down the drill, drilling, hole cleaning and determination of depth, into the steel reinforcement cage and concrete pouring, catheter, pull out tube and clean up the pile head sink silt backfill pile.
The rotary drilling machine is in place and burying the protecting cylinder! When the bit is filled with soil sand material, the outer hole and the rotary drilling rig will be lifted
