... model & dimension available 5-High speed Steel tooth Tricone drill bit Hejian Fist Petroleum Equipment Co., Ltd. We have been in ... formations(213,214,215,217)These bits are designed to drill formations such as hard sandstone, dolomite, and broken ... -26( inch) TypeTricone bits, Steel tooth bits, PDC bits Applicable water well, oil field, construction, geothermal, directional boring, and underground ...