... A,B,X42,X46,X52,X56,X60,X65,X70,X Spiral Welded Oil Drilling Pipes We can produced drilling pipe( ... could straightening, ultrasonic inspection on pipe body and pipe end, magnetic particle inspection, friction welding, seam inspection. We strictly carry out ... and developing upon producing various oil drilling tools including Drill Pipe, Drill Collar, Heavy Weight Drill Pipe, Kelly,Pup Joint and so on. ...