... X42,X46,X52,X56,X60,X65,X70,X High Quality Carbon Steel Drill Pipe We can produced drilling pipe ... Joint and so on. Our API drill pipes are of high physical property, for their strictly controlled processing ... on the weld-neck region ensures the drill pipes are of no defects. All threads are ... plastic steel thread protectors on the connections. Drill pipes of our company are produced in accordance to ...