How Can The Operational Efficiency of Second-hand Rotary Drilling RIGS Be Improved? Adjusting These Three Parameters Is Very Crucial

Due to differences in service life and working conditions, second-hand rotary drilling RIGS are prone to parameter matching deviations, which directly affect the operation efficiency. By scientifically adjusting core parameters, not only can equipment wear and tear be reduced, but also the speed and quality of hole formation can be significantly improved. The following is an explanation from six key operational dimensions.

1. Drill pipe speed adjustment: The speed should be matched according to the geological hardness. For soft soil layers, the speed can be appropriately increased to 20-30r/min, while for hard rock layers, it should be reduced to 8-15r/min to avoid excessively high speed causing wear of the drill tools or too low speed affecting the footage. When the rotational speed does not match the formation, problems such as hole wall collapse or drill pipe jamming are prone to occur.

2. Drilling pressure control: In soft soil areas, the drilling pressure should be controlled at 15-25kN, and in hard rock areas, it should be increased to 30-45kN. Excessive pressure may cause the drill pipe to bend, while insufficient pressure will prevent effective rock layer breakage. The hydraulic system of second-hand equipment needs to be inspected regularly to ensure stable pressure output.

3. Optimization of mud ratio: For the clay layer, select thin mud with a density of 1.1-1.2g/cm³. For the sand layer, increase the density to 1.2-1.3g/cm³ to protect the hole. Mud that is too thick will increase the resistance of the drilling tools, while mud that is too thin cannot suspend the debris. The ratio of bentonite to water can be adjusted in real time by detecting the viscosity of the mud.

4. Drilling bucket lifting speed: In soft soil, the lifting speed should be controlled at 0.8-1.2m/s, and in hard rock areas, it should be reduced to 0.5-0.8m/s. If it is too fast, it may cause negative pressure inside the hole and lead to collapse; if it is too slow, it will prolong the operation cycle. For second-hand equipment, it is necessary to check the wear of the steel wire rope to avoid affecting efficiency due to poor lifting.

5. Rotation speed adaptation: In loose strata, adjust the rotation speed to 1-2r/min, and in dense strata, increase it to 2-3r/min. The rotation speed and drilling speed need to be adjusted synchronously to prevent hole position deviation. Regularly lubricate the rotary mechanism to ensure the smooth operation of the second-hand equipment.

6. No-load debugging frequency: Conduct no-load debugging for 10 to 15 minutes before each operation to check if all parameters are displayed normally, with particular attention paid to the sensitivity of the speed and pressure sensors. Through frequent debugging of second-hand equipment, parameter drift problems can be detected in a timely manner.

In conclusion, the efficiency improvement of second-hand rotary drilling RIGS does not rely on hardware replacement. Instead, it is achieved by precisely adjusting the three core parameters of drill pipe speed, drilling pressure, and mud ratio, and by coordinating with the lifting of the drill bucket, the adaptation of rotary speed, and no-load debugging, to achieve the optimal match between equipment performance and working conditions. Long-term adherence to scientific parameter management can not only extend the service life of second-hand equipment but also reduce construction costs and enhance the economic benefits of the project.