rotary drilling rig

Also known as rotary drilling rig, pile driver.  Rotary excavator is a comprehensive drilling machine, it can use a variety of bottom, with a hole forming speed, less pollution, strong mobility and other characteristics.  A short auger bit can be used for dry operations, or a rotary bit can be used for wet operations with mud protection.  Rotary excavator can be used with hammer drilling hard ground after digging operations.  Reaming can be performed at the bottom of the hole with an extended-head drill.  Rotary excavator adopts multi-layer telescopic drill pipe, less drilling auxiliary time, low labor intensity, no need for mud circulation slag discharge, cost saving, especially suitable for the foundation construction of urban construction.