Rotary drilling rig is a kind of comprehensive drilling rig, which can use short auger bit to carry out dry digging operation or rotary bit to carry out wet digging operation with mud arm guard.
The rotary drilling rig can be used with a hammer to drill and break up hard strata and then carry out hole digging operations.
The torque and shaft pressure output from the rotary drilling rig are all coalesced on the tips of the drill teeth to cut or break.
The drilling teeth of rotary drilling rig is one of the core components of drilling tools, which directly affects the drilling efficiency and construction effect. The selection of drilling teeth and their quality determines the drilling load and construction efficiency.
The selection of drilling teeth is based on the type and strength of the geology. Commonly used drilling teeth can be divided into three major types: bucket teeth, cut-off teeth and tooth wheel drills.
1.Bucket Teeth
Characteristics: Bucket teeth belong to the typical cutting drilling method, linear cutter, drilling is realized by cutting the plastic loose geology through the edge of the teeth. They are assembled at the front end of rotary drilling bucket, with large cutting edge, suitable for excavation and crushing.
Scenario: Used in the cleaning phase of the drilling bucket in all kinds of geology, especially in soft soil and gravel layers.
Advantage: It can cooperate with drilling bucket to complete excavation and soil clearing.
2.Rotary cut-off teeth
Rotary cutter is a kind of point-type cutter, shear“crushing”drilling method.
It is characterized by short length of streamlined conical tooth body, wear-resistant tooth tip made of hot isostatic pressure carbide, high ground pressure value of the tooth tip, and further enhancement of the pressure of the drilling teeth to improve the crushing capacity into the rock.
3.Rotary palm piece
Rotary palm is a kind of point-type cutter, the tungsten carbide drilling teeth through the axial pressure and torque, the formation of rotary, rotational sliding, longitudinal vibration, high-frequency shear crushing or impact crushing to break the rock.
4. Cylindrical teeth (Bullet Teeth)
Characteristics: Bullet Teeth are common conical or cylindrical drilling teeth with high hardness tungsten carbide head and locking structure at the bottom, which is easy to install and replace.
Applicable Scenario: Mainly used in ordinary soil, clay, sand and other medium hardness geology, also applicable to some soft rock.
Advantages: Strong cutting ability, even wear, long service life.
5. Flat Teeth
Characteristics: Flat teeth are usually designed with wide cutting edge and straight cutting edge, suitable for large cutting area.
Applicable scenes: Used in soft soil layer, gravel layer and other geological, especially in cleaning the ground and grooving excellent performance.
Advantages: Improve cutting stability and reduce drilling resistance.
6. Horseshoe teeth (Horseshoe Teeth)
Characteristics: Shaped like a horseshoe, with a wide cutter head, capable of cutting a larger area of soil.
Applicable scenarios: For medium hard soil, mud and sand layer and gravel layer.
Advantages: Wide cutting surface, suitable for large diameter drills, improved efficiency.
7. Tapered Teeth (Taper Teeth)
Characteristics: Tapered design with high hardness alloy at the tip for high drilling capacity.
Scenario: Suitable for hard geological conditions, such as pebble layer, rock and hard clay.
Advantages: High drilling efficiency, strong breaking force for hard rock layers.
8. Rock Teeth (Rock Teeth)
Characteristics: Adopting high hardness and high strength cemented carbide head with excellent wear resistance.
Applicable scenes: For hard rock layer, pebble layer and weathered rock geology.
Advantages: Strong cutting ability, impact resistance, long life.
9. Special Drill Teeth (Customized Teeth)
Characteristics: Customized teeth designed for special geological conditions (e.g. permafrost, particularly hard rock formations).
Applicable Scenario: Specialized for complex or extreme geological conditions.
Advantages: Highly targeted and efficient.
Considerations for selecting drilling teeth
Geological analysis: Select the appropriate type of drill teeth according to the geological conditions of the construction area (e.g. soil layer, rock hardness).
Matching equipment: Ensure that the specification and interface type of the drilling teeth match the drilling tools of the rotary drilling rig.
Regular Replacement: Replace the drill teeth when they are worn to maintain drilling efficiency.
Lubrication and cooling: Pay attention to the cooling and lubrication of the drilling teeth during the construction process to prolong the service life.
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