Engineering & Construction Machinery PartsChina API 5dp E75 R780 N80 G105 S135 Drill Pipe for Oilfield Service with R1, R2 and R3 Length, Find details about China API 5dp E75 Drill Steel Pipe, R780 N80 Steel Drill Pipe from API 5dp E75 R780 N80 G105 S135 Drill Pipe for Oilfield Service with R1, R2 and R3 Length