Mainly used in oil and gas exploration Drill Pipe, Mainly used in oil and gas exploration and development ... .Standard: According to API Spec 5DP, We can produce the drill pipe as per NS-1 Spec.and Norsok Spec.as ... -200XT, Arnco-300XT, Arnco-150XTInternal Coating: TC2000, TK34, TK34-P Drill Pipe