Reasons and solutions for slow drilling speed of horizontal directional machine

Reasons:
1. Complex geological conditions
When encountering hard rocks, pebble layers or underground obstacles, the drilling resistance increases.
2. Drill bit wear
Long-term use causes serious wear of the drill bit and reduced cutting ability.
3. Unreasonable drilling parameter settings
Such as drilling speed is too fast or too slow, insufficient feed force, mismatched rotation speed, etc.
4. Poor mud performance
The mud has low viscosity and poor sand carrying capacity, which cannot effectively cool and lubricate the drill bit, nor can it stabilize the hole wall.
5. Equipment failure or aging
Engine power decreases, transmission system wear, hydraulic system leakage, etc.
6. Guidance deviation
The drilling trajectory deviates from the designed route and requires frequent adjustments, affecting the drilling speed.
Solutions:
1. For complex geological conditions
Use a more suitable drill bit type, such as a diamond drill bit; or perform geological treatment in advance, such as blasting rocks and removing obstacles.
2. Check and replace worn drill bits
Check the wear of the drill bit regularly and replace the severely worn drill bit in time.
3. Optimize drilling parameters
According to geological conditions and equipment performance, determine the best drilling speed, feed force and rotation speed through experiments.
4. Improve mud performance
Adjust the mud formula to increase viscosity and sand carrying capacity; ensure the normal supply and circulation of mud.
5. Equipment maintenance and overhaul
Perform comprehensive maintenance of equipment regularly, repair faults, replace aging parts, and ensure good equipment performance.
6. Improve guidance accuracy
Use more advanced guidance systems to strengthen the monitoring and control of drilling trajectories and reduce deviations and adjustment times.