Drill pipe and drill rod 1.O.D :2 3/8"-6 5/8 2.Grade:E,X,G,S 3.Upset: EU,IU,IEU Drill Pipe/Drill rodIt’s basic function include (1)snubbing in or out drilling bit,(2)putting on the screw,(3)delivering the motive power, (4)transfer drilling fluide,(5)proceeding special work,such as cement squeeze,disposing the accident under the shaft.Specification for Drill Pipe (API Spec 5D) ...