What Should Be Done When A Rotary Drilling Rig Encounters Hard Rock Layers

Hard rock layers, due to their high hardness and dense structure, can bring problems such as slow drilling and heavy equipment load to rotary drilling RIGS during operation. Mastering scientific response methods can effectively enhance construction efficiency and protect equipment.

1. Drill tool compatibility selection: Prioritize the use of toothed cylinder drills or cut-tooth rock drill buckets. The hard alloy teeth of these types of drills can enhance the cutting ability on rocks. Avoid using ordinary sand scoops to prevent the drill teeth from wearing out too quickly.

2. Precise parameter adjustment: Reduce the speed of the power head to 10-20r/min, while increasing the torque. Through "slow rotation and strong cutting", the impact of the rock on the drilling tool is reduced. When applying pressure, short-stroke point pressure is adopted to gradually break the rock.

3. Auxiliary crushing treatment: If the rock layer hardness is extremely high, static blasting or hydraulic hammer pre-crushing of the surface rock can be adopted first to reduce drilling resistance. Clear the rock blocks in time after they are broken to avoid secondary obstruction.

4. Cooling and lubrication guarantee: During drilling, continuously spray cooling water on the contact area between the drill bucket and the rock. This can not only lower the temperature of the drill teeth and reduce wear, but also carry away rock powder through water flow to prevent stuck drill.

5. Timely cleaning of the drill bucket: Lift the drill once every 30 to 50 centimeters of drilling to empty the rock debris in the bucket to prevent it from accumulating and affecting the cutting effect of the next drilling. When lifting the drill, keep it steady and avoid colliding with the hole wall.

6. Real-time monitoring of equipment: Closely monitor the pressure and torque gauge values of the power head. If any abnormal fluctuations occur, immediately stop the machine for inspection. Regularly check the wear of the drill teeth and replace the damaged parts in time to prevent the fault from expanding.

When rotary drilling RIGS are used in hard rock strata, the core lies in balancing efficiency and equipment safety through a combination strategy of "suitable tools + reasonable parameters + precise operation". Proper selection of drilling tools, parameter adjustment and real-time monitoring can not only effectively break hard rock, but also reduce equipment wear and tear, ensuring the smooth progress of construction.