China OCTG Drill Pipe manufacturer orient steel supplies API 5DP OCTG Drill Steel Pipe API SPEC 5DP, Grade E75, X95, G105, S135, for well drilling, 6.88- 12.7 mm.
ChinaOCTG Pup Joint manufacturer orient steel supplies API Spec 5CT OCTG Pup Joint API SPEC 5DP for for Tubing, Casing, Drill Pipe with Threaded Protector.