... , which makes it convenient to align with working position.4) Rig structure is separate group design, it assures good disassembility , rapid ... axle and buckles), which makes it possible for greatly reduce rig weight and fastener transport.6) The imported hydraulic motor, other ... as carbide bit drilling, anger drilling, DTH hammer drilling, follow-up casing drilling etc.1.Hole depth:70-80m2.Hole diameter ...