Wash boring is soil boring test with motorized drilling machine

Wash boring is soil boring test implement by water injection passing drilling rod through borehole with high pressure water pump and flow to chopping bit for soil impingement or soil mastication. Soil was damaged until size of soil is smaller which soil is moved up at the borehole wall by water and flowed down in

Boring test with rotary drilling rig.

Boring test with rotary drilling rig good for hard clay

This is the soil boring test with rotary drilling rig by each setting of speed. It has the hole for the water injection by pumping from water tank and resemble with wash boring but it is action so cold with your hand on drilling rod which is hard for forecast of soil layer changing while