Spiral Welded Oil Drilling Pipes 1.OD: 10.3-1219.2mm 2. ... X52,X56,X60,X65,X70,X Spiral Welded Oil Drilling Pipes We can produced drilling pipe(API5D,APISEPC7,API5CT) of 2 ... 1/2",5",5-1/2"oil drilling pipe :-Drilling pipe,heavy weight drilling pipe,tubing pipe,casing pipe. We can ... 've been exploring and developing upon producing various oil drilling tools including Drill Pipe, Drill Collar, Heavy Weight ...