The principle of reaming bit is to place the drill rod into the borehole filled with flushing fluid, and the rotation of the rotating disc drives the air-tight square transmission rod and the drill bit to cut the rock and soil, and the compressed air is sprayed from the nozzle of the lower end of the drill rod. The cut soil, sand, etc. form a mud, sand, and water-gas mixture that is lighter than water in the drill pipe. Due to the combined effect of the pressure difference between the inside and outside of the drill pipe and the pneumatic and pneumatic pressure, the mud sand water-gas mixture and the flushing fluid are raised together and discharged through the pressure delivery hose to the ground mud pool or water storage tank. The soil, sand, gravel, and cuttings are in the mud Precipitation in the tank, the flushing fluid then flows into the manhole.

　　Features of reaming bit:

　　1. Compared with imported reaming bits, kaiqiu drilling tools have the advantages of a lightweight, high-cost performance, and low maintenance costs.

　　2. The reaming bit is equipped with a mechanical arm connected with a drill rod, which can be used in straight holes and small top angle conditions. At the same time, the drilling rig is also equipped with an auxiliary hydraulic winch, which greatly reduces the labor intensity of the machine workers, which is conducive to the safe construction of the machine and civilized construction.

　　3. The drilling rig adopts an engineering crawler and hydraulic crawler chassis, which is convenient to move and is more suitable for plains, plateaus, hills, and other landforms. The chassis is equipped with 4 outriggers. During drilling, the drilling machine has less vibration and good stability.

　　4. The reaming bit is driven by electric power, with low noise, low pollution, high efficiency, and a large power reserve coefficient.

　　5. The reaming bit is a multi-function type, all key components are cost-effective products, and the system is equipped with pressure protection and alarm devices.

　　6. The handles and instruments of all actuators of the reaming bit are on the operating table, and the operation and control are convenient and reliable.

　　7. The reaming bit adopts a unique drilling frame and a large drilling process, large torsion resistance, simple structure, convenient maintenance, easy to relocate, and the operation of the orifice is more convenient, and it can be drilled at a large top angle.

　　8. The reaming bit adopts a large powerhead with a large impact resistance function, and the rotation speed is suitable for the needs of air reverse circulation. The parameters such as lifting force and torque can meet the requirements of 100M shallow air reverse circulation DTH hammer drilling and other processes.