Product Description PDC for oil drilling bits series is produced by using the higher degree of diamond powder and tungsten carbide substrate through ...Hejian Ouman Drill Bits Co. Limited
Matrix PDC drill bits, or Matrix fixed cutter bitsMatrix body fixed cutters are made from tungsten carbide material. This provides improved wear ...Zhengzhou Combetter Superhard Material Co. Limited
API standard E75 X95,G105 and S135 steel grades,2 7/8" -5 1/2" oil drill pipes and shoulder joint drill pipes with high torsional resistance are ...Shijiazhuang Longway Petroleum Drill Tools Co. Limited
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