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Cov ntsis laum API IADC537 5 5/8″ (142.9mm)
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Cov khoom siv tungsten carbide ceev ceev IADC537 5 7/8″ (149mm)
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Cov pob zeb tricone IADC537 6 nti (152.4 hli)
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Lub ntsis tricone tig IADC537 6 1/4 nti (159 hli)
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TCI tricone pob zeb IADC537 6 3/4 "(171mm)
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API khawm ntsis IADC537 6.5 nti (165 hli) nrog tus nqi luv nqi
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TCI pob zeb ntsis IADC537 7 1/2” (190 hli)
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API Hoobkas tricone ntsis IADC537 7 5/8 ”(193.7 hli)
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TCI tricone ntsis IADC537 7 7/8 nti (200 hli)
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Tungsten Carbide Ntxig Ntsis IADC537 8 1/2″(215.9mm)
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API khawm pob zeb laum ntsis IADC537 8 3/4″ (222.2mm) nrog tus nqi luv nqi
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TCI laum ntsis IADC537 9 1/2″(241mm) rau cov roj av tawv