Changsha tianhe drilling tools and machinery co.,ltd.

1.Down-the-hole hammers and bits( 3" to 16", with COP, DHD, SD, XL, Halco, Mission, Br, QL shank) 2.Overburden casing system( f90 ODEX to f273 ODEX) 3.Symmetrix overburden casing system 4.Rock drilling accessories: button bits, shank adapters, coupling sleeves