Oilfield Products, Drill Rig, Petroleum Equipment manufacturer / supplier in China, offering 2-3/8" ~ 6-5/8" Outer Diameter Drill Pipe for Petroleum Exploration, API 7-1 Nmdc Non-Magnetic Nc38 Drill Pipe Drill Collar for Well Drilling, API 5dp Drill Pipe 2-3/8′′ to 6-5/8′′ and so on.
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