roller cutters are acailable for wide range of application. It can be matched to types of reverse circulat-ion rigs and cover the drilling range of 400mm - 3500mm with maximum penetration rate. These cutters are hydrostatically sealed and can be used in submerged applications without affecting bearings.Tungsten carbide is feasible for medium to hard rocks, including sandstones, limestones, tuffs,granites. ect.
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