Core drill bits are increasingly used in mining operations. However, due to a lack of understanding of the causes of damage, they often fail. Today, in response to numerous customer requests, we provide analysis on the following issues:

 

1. Core drill bits operating in gravel-prone formations;

 

2. Improper hydraulic parameters in core drill bits;

 

Excessive power can cause severe wear on the drill bit when using a core drill bit. Improper nozzle positioning can cause the jet to reflect back to the bottom of the well, directly eroding the cutters.

 

Excessive power can severely affect the cleaning and cooling of the diamond compacts, especially in soft formations, where mud plugging can occur. In hard formations, diamond compacts are more susceptible to thermally accelerated wear.

 

3. The presence of numerous hard interbeds in the formation.

 

During drilling, as the formation transitions from soft to hard interbeds, the structural shape of the composite drill bit crown can cause contact between cutters in the same area of ??the bit. Differences in formation hardness can lead to uneven cutting forces, resulting in poor penetration and bit bounce.

 

The above three factors are the main causes of core drill bit damage. Therefore, in actual operations, it is necessary to take specific measures to avoid core drill bit damage.