Symmetric Bit with casing shoe
Stable and reliable working performance
Full face head design for faster penetration and straighter hole
Less torque is required than eccentric drilling
Can drill in vertical, horizontal or any direction
Minimize disruption to the drilled hole
Effective cuttings removal
Unlocking-relocking easily
Easy to operate and system security
Varied ring bit diameters to suit different casing requirement
The less vibration of drill rig
Symmetric Bit with casing shoe
It is suitable for cobblestone and fracture formation, water wells, geothermal wells , micro-pile, medium and mini grouting hole drilling
1. Ring bit and casing shoe assembly is welded on casing before drilling, and then lock the pilot bit and ring bit and casing shoe together,
the pilot bit shoulder mesh with casing shoe.
2. The percussive energy is transferred to the pilot and ring bits to crush rock, Part of impact energy leads the casing move forward.
3. After completion of drilling, the drill string with pilot bit is retrieved by a slight reverse rotation to unlock the bayonet coupling,
then the ring bit stays in the hole. When the hole is finished grouting, to pull up casing and ring bits together.
To continue drilling with conventional drilling tools in the bedrock.
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