Rock drilling tools factory KINGDRILLING professionally produce Concentric drilling systems by down the hole hammer which are designed to drill and case a hole simultaneously through unstable ground conditions. In the process of this MRE slide bit casing drilling, it could carry the casing tube down to the hole and protect wall to achieve drilling work.
At clockwise condition, reamer bit expanded to bring the casing tube into hole. After finished, reamer bit closed anticlockwise and then can be lift up by the drilling machines. This casing drilling bit is especially suitable for diameter 114-273mm.
It is suitable for drilling water wells, geothermal wells, short micro piles ,medium mini-type grouting hole of building , dam and harbor project .
Hole dia (mm)
How to order:
Casing Tube OD & ID + Reamer Bit Diameter + Minimal Casing Shoe ID + Hammer Shank Style
1. How to order the products?
A: Please send the inquiry with detail item description or with Model number.
2. Can I expect a quality products?
A: Yes. mature production technology ensuring the quality satisfy international request.
3. Fast delivery time:
A: Usually it takes 25 days for production.only 3 or 5 days if we have stock of your request size.
4. Shipping way:
A: Sample order: we suggest Courier express delivery such as DHL/UPS/TNT/FEDEX or by air
Bulk order: by air or by sea we suggest.
5.What is the materials?
Steel is TIMKEN, Alloy is from T6 from Element Six.
6. How to choose the suitable head face of the DTH drill bit?
Suitable for all kinds of formation, especially for deep well drilling, perpendicularity of the hole is wonderful.
Suitable for the formation of moderate hardness stratum, drilling efficiency is good, borehole perpendicularity is moderate.
Suitable for special hard formation stratum, especially for fracture, crack spacing and complex formation drilling effect is very good, has the good perpendicularity of the borehole.