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Izingcezu zokubhoboza kahle ezenziwe ngezifiso IADC127 14 3/4 ” (374mm)
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I-Wholesale trione bits IADC127 17.5 amayintshi (444.5mm)
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Izingxenye zokumba ipulaki likasimende IADC127 4 3/4 amayintshi (120mm)
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Ibhithi lokubhoboza kahle i-IADC127 3 7/8″ amayintshi (98.4mm)
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I-API trione drilling IADC127 4 5/8 amayintshi (118mm) iyathengiswa
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Imboni yamabhithi avaliwe i-IADC127 6 amayintshi (152mm)
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Izingcezu zokumba umthombo ojulile IADC127 12 1/4 ” (311mm)