Reason for deflection:

1. encountering large boulders or exploration stones during the drilling process;

2. Generally, at the intersection of environments with different inclinations and hardness, drilling with inclinations or sand and gravel entering the hole results in uneven force on the drill bit;

When the wellbore is large, the drill bit leans to one side;

4. The drilling rig is parked unevenly or unevenly;

The drill pipe is bent and the joint is incorrect;

Avoidance and handling

When drilling, the drill pipe, drill bit, and sheath should be in a straight line and regularly checked and calibrated;

2. Timely adjust the drill pipe;

When drilling in curved soft and hard formations, the drill rod should be hung to control the foot and the drilling speed should be low.