As the professional manufacture of non-excavation drilling tools, we can produce and modify all specification of non-excavation drill pipes, non-excavation special non-magnetic short bent collar and direction sub, such as, products with specifications of 3M, 4.5M, 6M, φ73, φ89, and so on. Besides, we can produce non-excavation direction drill bit (slick and non-magnetic) and other non-excavation special drills.