20" Drill Rock Bits,Rock Drill Bits

Tricone bits used for geoloical prospecting,development of oil and gas,drilling water wells,blast holes and making holes for seismic prospecting,construction engineering.now there are eleven common types of tricone rock bits. Steel teeth series:IADC CODE:116,117,126,127,136,137,216,217,317,337, TCI series:IADC CODE:417,437,447,517,527,537,547,617,627,637,647,737,837. TCI tricone bit, tci roller Bits ,roller bit,steel tooth roller bit,TCI roller bit,TCI tricone bit 1.Sizes