oil drilling bits

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oil drilling bits(1)
rock drilling bits(1)

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12.5inch carbide tooth tricone roller rock bit
Specification: diameter 311mm;IADC517/617
Detail: Machine Type: Drilling Tool Drilling formation:soft to medium hard Tooth type:insert tooth tooth material:tungsten cobalt Processing type:forging bearing type:journal Sealed:metal Circulation system:mud pump certifi...


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