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Sealed Bearing Laum bts IADC126 9 7/8 nti (250mm)
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Tricone laum khoom tsum IADC126 12 1/4 nti (311mm) rau qhov zoo drilling
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Ntsis rau qhov zoo drilling IADC127 3 7/8 "inches (98.4mm)
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API Tricone Drilling IADC127 4 5/8 nti (118mm) kev muag khoom
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Ntim cov khoom Hoobkas IADC127 6 nti (152mm)
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IADC127 12 1/4 "(311mm)
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Pob zeb diamond Tricon ntsis IADC216 7.5 nti (190mm)
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Tricone khoom Hoobkas IADC216 9 7/8inches (250.8mm)