... Fist Petroleum Equipment Co., Ltd, who produce and export drill bits. We have a Export Department, which specialize in ... bits, Drill Pipe, TCI tricone bits, PDC bits, PDC Diamond drill bits, roller rock bits, core bits, all size bits in oilfield, water well drilling, mineral and geological and ... customers abroad, such as America, Japan, Korea, Germany and so on. Thus the stable supplies, the quality as ...