Bore Well Drilling Bits at the Best Prices - Alibaba.com
2. The features of TCI bits lead to its drilling formation almost are hard rocks, like limestone, dolomite,chert, firm sandstone, firm anhydrite, etc. Steel tooth bits series 114-117 Soft Formation Tooth Bits The 114-117 bits are used to drill low compressive strength,soft formations . 5 95.2~174.6 3 3/4-6 7/8 294-539 80-60 187.3~241.3 7 3/8-9 1/2 539-833 60-40 hard Sandy, Shale, Quartzite ...
Get Price