Changsha Tianhe Drilling Tools and Machinery Co.,Ltd.
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China Supplier 6inch Dth Hammer System With Ring Bit/Casing Drilling System
General Introdunction
Design Principles
Make the casing follow easy and the equipment and operation simple
Outstanding Advantages
1. The stable and reliable working performance and the less vibration of drill rig.
2. Flexible to open and close.
Aplication Range
It is suitable for drilling water wells,geothermal wells, short mircopiles medium mini-type grouting hole of building, dam and harbour project.
Raw Material
Steel:
first class special alloy steel with high strength, heat resistance and wearable
Carbide
The best tungsten carbides from China are commonly applied.
Tungsten carbide from European is also available.
Specification
1.drill in overburden unstable rock
2.one step to drill and follow casing
5.Face: Flat,Convex,Concave,Drop-center.
6.Carbide Button Shape: Spherical,Semi-ballistic,Ballistic and Two-step
7.Bit Shank: COP/DHD/QL/SD/MACH/BR
Operation Procedure
1. when the drilling starts, the blocks slides down through the grooves on pilot bit,and reams to drive the casing shoes and tubes into the hole.
2. When finished the drilling in overburden rock formations, raise the drilling tools and the blocks will get closed through the grooves , and the drilling tools can be pulled out from the hole.
3. Next construction can be followed.
