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API 12 1/4 ʻīniha ʻīniha ʻāpana no ka ʻeli ʻaila hohonu pōhaku paʻa
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hale hana API 17.5 iniha PDC a me tricone hybrid drill bit no ka luawai aila hohonu
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API 8.5 'īniha wiliwili puʻupuʻu PDC-roller pūhui no ka paʻakikī paʻakikī
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9.5 'īniha Hybrid bit PDC i hui pū ʻia me ka ʻōwili cone no ka ʻaila ʻaila