... transfer case, gearbox, double-winch unit, mud pump, turntable, drilling tower, feed mechanism are ... guide tension system, the derrick, the mud pump, the sub frame, and the operation system, ... DONGFENG, The main drive style is mechanical, and the control mechanism is partial hydraulic while partial ... of Max. line150KNThe more pictures of water well hydraulic rig for sale:The pictures of certification: ...