Different trenching bits and a solution to the problem

Trenching bits are mainly used in chain trenchers, surface mining machines, wheeled trenchers, demolition attachments, and horizontal directional drilling machines. Trenching bits can also be used for trenching applications such as buried oil pipelines, water pipelines, and fiber optic cables, as well as for breaking up roads and rock pavements.

Here is the content list:

• A problem that may arise in the construction

• Different rock properties will affect the rotation of the drill bit

A problem that may arise in the construction

The trenching bit may be covered with mud mass on the surface of the bit in use, making it impossible for the bit to perform normal rock breaking, which may occur during normal drilling up and down.

The performance of the drilling fluid is a very important factor that affects the mud pack of the drill bit of the wheeled trenching machine. Therefore, in the good section where the mud pack is likely to appear, the mud pack phenomenon can be prevented by adjusting the performance of the drilling fluid. By controlling the density and water loss of drilling fluid, the quality of mud packs can be improved; by adding corrosion inhibitors to improve the suppression of drilling fluid, the hydration decomposition of mud shale can be effectively controlled; the solid phase content in drilling fluid needs to be controlled to be reduced. It can remove the viscosity and shear force of drilling fluid and remove the harmful solid phase in time.

In addition, alkaline substances should be added to the drilling fluid in advance before entering the gypsum formation to prevent it from polluting the drilling fluid; for the sandstone layer with strong permeability, shielding temporary plugging materials can be added to the drilling fluid to reduce permeation leakage. Alkaline substances should be added to the drilling fluid in advance before entering the gypsum formation to prevent it from contaminating the drilling fluid; for sandstone formations with strong permeability, shielding temporary plugging materials can be added to the drilling fluid to reduce permeation leakage. Alkaline substances should be added to the drilling fluid in advance before entering the gypsum formation to prevent it from contaminating the drilling fluid; for sandstone formations with strong permeability, shielding temporary plugging materials can be added to the drilling fluid to reduce permeation leakage, playing an effective role in protecting the trenching bit.

Different rock properties will affect the rotation of the drill bit

During the drilling process of trenching bit, if the formation hardness is relatively small and the drilling speed is relatively fast, it is difficult to have enough time to expand the diameter and the probability of trenching bit rotation is relatively low. However, if the hardness of the stratum is relatively large, the drilling speed will gradually slow down and the trenching bit will be prone to spin. In addition, the cohesive stratum is easy to cause a mud pack of drill bits, which can effectively reduce the tendency of rotation. In the drilling process of loose stratum, it is easy to cause the expansion of good diameter, and it is easy to cause the rotation of the drill bit.

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