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Drill Collars
We are supplying the Drill Collars, which are made from ultrasonically tested bars of Chrome Molybdenum Alloy Steel (AISI4145 modified material) and available in all sizes and connections as per API std 7 & API RP 7G in Range 2. Drill collar bars are fully heat treated to 285 to 341BHN and Charpy impact value of 40 ft. lb.
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