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Tag nrho cov laum me me Hoobkas IADC127 6 1/4 nti (158.8 hli)
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Tricone khoom siv IADC127 7.5 nti (190 hli)
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API rig drilling bits IADC127 8 1/2 nti (215 hli) rau pob zeb tawv
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Cov khoom siv Tricone hauv Tshuag IADC127 8 3/4 nti (222mm)
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API zeb hniav ntsis hauv Tshuag IADC127 9.5 nti (241mm)
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Cov khoom siv tho qhov dej tob IADC127 13 5/8 ”(346mm) muaj nyob rau hauv Tshuag
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Cov ntsis tho qhov rau cov cement IADC127 4 3/4 nti (120 hli)
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Lub ntsis rau qhov dej khawb IADC127 3 7/8″ nti (98.4mm)
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Chaw tsim khoom Tricone bits IADC127 4 9/16 nti (115.9mm)
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API tricone drilling IADC127 4 5/8 nti (118mm) rau kev muag khoom
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Tricone bits Hoobkas IADC127 5 7/8 nti (149mm) rau kev khawb qhov dej nyuaj
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Lub Hoobkas Kaw Cov Khoom IADC127 6 nti (152 hli)