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Terebra API TCI triconica ad saxa perforanda IADC417 6″ (152mm) ad puteos duros
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Terebra triconica TCI IADC437 12 1/4″ (311mm) ad puteos perforandos
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Terebra rotatoria API IADC517 4.5 unciarum (114mm) in promptu
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Terebra rotunda IADC517 118mm ad perforationem saxorum puteorum geothermalium.
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Officina API terebrarum rotatoriarum IADC517 4 3/4″ (120mm)
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Terebra perforatoria saxorum e carburo tungsteni IADC517 5 7/8″ (149mm)
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Terebra triconica API ad puteos perforandos IADC517 6″ (152.4mm) venalis
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Terebra triconica TCI IADC517 7 1/2″ (190mm)
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Terebra Triconica API IADC517 8.5 unciae (215.90mm)
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Terebra API Tricone IADC517 8 3/4 unciarum (222mm) in promptu
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Terebra rotatoria saxorum IADC517 11 5/8″ (295mm)
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Terebra triconica rotatoria IADC517 12 1/4″ (311mm)