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6 1/4 (158.8) IADC127 Mill Tooth Bit Drilling For Water Oil Gas Well Api Iso
4 3/4(120.6mm)Inches Tricone Drill Bits Carbide For Energy And Mining
4 5/8 1 (117.5mm) Non Sealed Bearing PDC Drill Bits Soft To Hard Formation
Long Lasting PDC Drill Bits 5 1/2'' - 17 2/1'' Soft To Medium Shale Sequences
4 5/8 (117.5mm)Carbide Drill Bit For Construction Works Mining Project
14 5/8 (371.5mm) API standard tricone bit for oil, coal, and natural gas mining
14 3/4(374.6mm)Tricone Tungsten Carbide Drill Bits 7 5/8 API Reg Horizontal
15 1/2(393.7mm)Carbide Tricone Drill Bits 26 Inches 24 Inches For Energy Mining
16(406.4mm)Rotating Cone Rock Roller Drill Bit 3 Cutters For Efficient Drilling
3 1/2(88.9)Water Based Geology Tricone Drill Bits Oil-Based Geology 2-3/8 API
17 1/2(444.5mm)Construction Works Tricone Rock Roller Bits Low Noise Horizontal
20 (508mm) Long Life Span Tricone Drill Bits Tricone Rock Bit for oil wells and