Spiral Welded Oil Drilling Pipes 1.OD: 10.3-1219.2mm 2.WT: ... X42,X46,X52,X56,X60,X65,X70,X Spiral Welded Oil Drilling Pipes We can produced drilling pipe(API5D,APISEPC7,API5CT) ... Kelly,Pup Joint and so on. Our API drill pipes are of high physical property, for their strictly controlled ... plastic steel thread protectors on the connections. Drill pipes of our company are produced in accordance to Standards ...