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Tricone khoom chaw tsim tshuaj paus IADC127 4 9/16 nti (115.9mm)
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Tricone khoom Hoobkas IADC127 5 7/8 nti (149mm) rau qhov zoo drilling
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Tag nrho cov laum khoom Hoobkas IADC127 6 1/4 nti (158.8mm)
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Tricone khoom muag IADC127 7.5 nti (190mm)
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Drilling khoom hauv Tshuag IADC127 7 7/8 nti (200mm)
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API rig drilling khoom IADC127 8 1/2 nti (215mm) rau cov pob zeb tawv
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Tricone khoom hauv Tshuag IADC127 8 3/4 nti (222mm)
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API zeb hniav khoom hauv Tshuag IADC127 9.5 nti (241mm)
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luv nqi tricone khoom IADC127 9 5/8 "(244.5mm)
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Rotating taub hau rau rig IADC127 9 7/8 "(250.8mm)
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3 cones rau cov menyuam khoom IADC127 11 5/8 "(295mm)
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IADC127 13 5/8 "(346mm) hauv Tshuag