... on time 1,Types: pdc drill bit which are used for mining pilling, water well drilling or oil well drilling2,Model: various kinds and ... : API9,Applicable f Moq:1 piece or: petroleum&gas,water well and mining10,Bearing sealed: metal sealed(HJ) rubber sealed( ... formation,very hard formation .We have different and suitable types12,Button bit: small tooth, big tooth,conical inserts,chisel inserts13,Packing: ...