tube technologies offers a complete line of products for the oil/gas exploration industry. Our Inertia Welded Upset Drill Pipe can make drilling deeper a relaxing experience. Using API standards, guarantees the quality that our customers can rely on.   Drill Pipe 2 3/8" - 4 1/2" O.D. R-1 and R-2 Grades E,X,G and S 2" IF - 4 1/2" IF Drill Collars Subs