The Causes of Accidents Involving Small Rotary Drilling RIGS During The Drilling of Gravel And Soil

In construction, small rotary drilling RIGS are widely used due to their advantages of high efficiency and flexibility. However, accidents are prone to occur when drilling in gravel soil layers. These accidents not only affect the construction progress, but also may bring potential safety hazards. The following will analyze the causes of the accident from six aspects to help construction workers better prevent and respond to it.

1. Complex geological conditions: The particle size of crushed stone and soil is uneven and the gradation is complex. There are large stones or pebbles, which can easily cause uneven force on the drill bit, leading to accidents such as deviation and stuck drill.

2. Improper equipment selection: If the torque, drilling pressure and other parameters of the small rotary drilling rig do not match the gravel soil layer, it will be difficult to break hard stones and may also cause overload damage to the power system.

3. Unreasonable drilling process: Excessive drilling speed will prevent the drill cuttings from being discharged in time, causing them to accumulate and squeeze inside the hole, increasing the load on the drill pipe and subsequently leading to problems such as hole collapse and buried drill.

4. Severe wear of the drill bit: Gravel and soil cause significant wear to the drill bit. If the worn drill bit is not inspected and replaced in time, its crushing capacity will decline, the drilling efficiency will decrease, and the risk of accidents will increase.

5. Operator errors: Insufficient operation experience or improper operation, such as poor control of the drilling Angle or too fast lifting speed, will damage the stability of the hole wall and cause the hole wall to collapse.

6. Lack of real-time monitoring: During the construction process, the conditions inside the hole were not effectively monitored, making it impossible to promptly detect any abnormalities in the hole wall and take corresponding measures, which led to the occurrence of accidents.

To sum up, the accidents that occur during the drilling of gravel and soil by small rotary drilling RIGS are caused by the combined effect of multiple factors. Before construction, it is necessary to fully understand the geological conditions, rationally select equipment and optimize the drilling process. During construction, it is necessary to enhance personnel training and real-time monitoring in order to reduce the probability of accidents and ensure construction safety and efficiency.