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API Rotary roller drill bit IADC517 4.5 inches (114mm) mustock
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Bhatani bhiti IADC517 118mm yekuchera geothermal tsime.
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API fekitori ye rotary roller bit IADC517 4 3/4″ (120mm)
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API bhatani rinotenderera rakanamwa mabits IADC517 5 1/4 ″ (133mm) mustock
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Tungsten Carbide Insert rock drilling bit IADC517 5 7/8″ (149mm)
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API Zvakanaka kuchera tricone bit IADC517 6 ″(152.4mm) iri kutengeswa
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Tricone roller drill bits IADC517 6 1/4″ (159mm)
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TCI yakavharwa bhatani redombo mabhiti IADC517 6 1/2 ″ (165mm) yekuchera matsime
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TCI trione bit IADC517 7 1/2 ″ (190mm)
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Yakadzika Zvakanaka Tricone Bit IADC517 7 7/8 inches (200mm)
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API Tricone Bit IADC517 8.5 inches (215.90mm)
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API Tricone drilling bit IADC517 8 3/4 inches (222mm) mustock