How Many Types of Drill Bits Are There for Rotary Drilling RIGS? When Purchasing Second-hand Drill Bits, Pay Attention To These 4 Points

The drill bit is the "tooth" of the rotary drilling rig that directly contacts the stratum. Its type selection is closely related to the operation efficiency and the quality of hole formation. Understanding the types of drill bits and key points for second-hand selection can help you control costs while ensuring smooth construction.

1. Spiral drill bit

The leaves are spirally shaped and are suitable for soft soil layers such as clay and silt, allowing for soil discharge while drilling. There are single-head and multi-head types. Multi-head drill bits have a faster drilling speed and are suitable for shallow operations.

2. Barrel drill bit

Also known as core cylinder drill bits, the cylinder wall is equipped with alloy teeth and is used in moderately weathered rock strata and gravel layers. By cutting and crushing rock and soil, the verticality of the formed holes is high, and it is often used in deep foundation construction.

3. Sand-picking drill bit

The bottom is equipped with a valve, specially designed for loose sand and gravel layers, and can effectively grasp construction waste. In strata prone to hole collapse, it can be combined with mud wall protection to enhance operational stability.

4. Cone drill bit

The rim is covered with hard alloy teeth, making it suitable for hard strata such as hard rock and basalt. Crushing rock and soil through compaction has high drilling efficiency but relatively fast wear.

5. Selection of second-hand drill bits: Check the degree of wear and tear

Focus on checking the wear of alloy teeth and the deformation of the cutter head. Excessive wear can lead to a sudden drop in drilling efficiency. If the tooth seat becomes loose, it may cause the risk of tooth loss during construction.

6. Selection of second-hand drill bits: Verify compatibility

Confirm that the drill bit specification matches the model of the drilling rig, especially whether the connection dimensions are compatible. The interface standards of different brands of drilling RIGS may vary. Blind selection may lead to installation failure.

The selection of drill bits for rotary drilling RIGS should be closely based on geological conditions, while the purchase of second-hand drill bits needs to take into account the wear condition and compatibility. Reasonable selection can not only reduce costs but also ensure construction efficiency, which is an indispensable link in the operation of second-hand rotary drilling RIGS.