Changsha tianhe drilling tools and machinery co., ltd.
1.DTH hammers and bits 2.overburden casing drilling syetem 3.symmetrix overburden casing drilling system 4.reverse circulation hammers and bits 5.button bits 6.shank adapter,coupling sleeve 7.parts of drill rigs 8.special related products as customers requirments
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Button bits
Concentric casing drilling system(symmetrix)
Dth hammers(for deeep and super deep hole drilling)
Odex casing drilling system(eccentric)
Reverse circulation dth hammers and bits
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