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Tianhe Perroleum Group  

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Tianhe Perroleum Group [China (Mainland)]


Country/Region: China (Mainland)

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drill collar, heavy weight drill pipe,

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  • drill collar

drill collar

Drill collar is mainly used to provide bit weight to drill bit so that drill pipe is in tension

2009-11-19

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  • drill

drill

The wall thickness of heavy weight drill pipe is between drill pipe and drill collar,its structure is simliar with drill pipe.

2009-11-27

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