... drill pipes:drilling pipeStandard: API 7 and API spec. 5DSpecification: O.D 2 3/8, 3 1/2, 4, 4 1/2 ... 100XT, 200XT, &300XT, BOTN3000, ARMACORMApplication: using for oil well drillingO.D.GradeWall ThicknessUpset Ends,For welded-on Tool JointsTool JointDrill Pipe ...