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Lub taub hau tig rau rig IADC127 9 7/8 ”(250.8mm)
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3 lub khob hliav qab rau cov menyuam IADC127 11 5/8” (295mm)
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Cov ntsis khawb qhov dej tob IADC127 12 1/4” (311mm)
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Cov khoom siv tho qhov dej tshwj xeeb IADC127 14 3/4 ”(374mm)
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Cov khoom lag luam wholesale tricone IADC127 17.5 nti (444.5mm)
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Tricone pob zeb IADC137 6 nti (152 hli) rau kev khawb qhov dej
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Cov hniav sib tsoo rau qhov dej khawb IADC215 17.5 nti (444.5 hli)
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API Tricone pob zeb bits IADC215 12 1/4 "(311mm) nrog tus nqi luv nqi
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API tricone drilling bit IADC215 8.5 nti (215.9 hli) rau kev muag khoom
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API lub tshuab laum me me Hoobkas IADC216 4.5 nti (114 hli)
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API drilling rig bits tus neeg muag khoom IADC216 5 3/4 nti (146mm)
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Cov hniav sib tsoo IADC216 6.5 nti (165 hli) rau kev khawb qhov dej