Spiral Welded Oil Drilling Pipes 1.OD: 10.3-1219. ... A,B,X42,X46,X52,X56,X60,X65,X70,X Spiral Welded Oil Drilling Pipes We can produced drilling pipe( ... 've been exploring and developing upon producing various oil drilling tools including Drill Pipe, Drill Collar, Heavy Weight Drill Pipe, ... pipes are of no defects. All threads are machined by CNC Lathes and inspected with API Spec standard thread gauges. ...