Drill Pipe in API 5D & 7
 Standard: API 5D & API 7
 Specification: OD: 2 3/8”, 2 7/8”, 3 1/2”, 4”, 4 1/2”, 5”, 6 5/8”
 Steel Grade: E75, X95, G105, S135
 Internal Coating: TK34, TC2000, TC3000
 Hardbanding: ARNCO 100XT, ARNCO 200XT, ARNCO 300XT, BOTN3000, ARMACORM
 Length: R1: 5.49-6.71m R2: 8.23-9.14m R3: 11.58-13.72m
 Usage: As the major part of drill stem, drill pipe connected with Kelly and drill collar, which is used to put torque to drill bit, and drill collar