A kind of grouting sweeping drill bit

Abstract

The invention relates to a grouting and hole cleaning drill bit. The difference lies in that the lower part of the drill bit is in a conical shape and gradually gets smaller along the direction of a bottom end; the drill bit comprises a hollow drill bit body and blades; the outer side of the lower end of the drill bit body is uniformly provided with a plurality of gauge teeth along a circumferential direction; the lower end of the drill bit body is uniformly provided with a plurality of blades along the circumferential direction; hole cleaning cutting teeth for cutting cement on a hole wall are arranged on each blade; the bottom ends of the blades are polymerized together, and hole bottom cutting teeth for cutting cement at a hole bottom are arranged at a polymerized part. The grouting and hole cleaning drill bit has high hole cleaning efficiency, can effectively prevent burned bit and buried bit accidents, is easily processed and is low in cost.

Description

technical field [0001] The invention relates to a grouting sweeping drill bit. Background technique [0002] In grouting construction, in many cases, grouting cannot reach the end standard at one time, so it is necessary to perform grouting-sweeping holes alternately. At the same time, the thickness of tailing sand and cement accumulated on the hole wall after grouting is also different. With the increase of hole depth Changes, the degree of density is not the same, the hardness is not the same, it is difficult to scan the hole. The existing technical solution is to use a drilling tool with a diamond drill bit to sweep the hole. This solution has several major disadvantages. First, it is not easy to match the carcass, the drill bit is too soft and easy to consume, and the cost of sweeping the hole is high; Second, due to the unevenness of softness and hardness due to the different density of the deposits in the well, it is easy to cause a hole deviation accident; third, bec...

AI Technical Summary

Problems solved by technology

[0002] In grouting construction, in many cases, grouting cannot reach the end standard at one time, so it is necessary to perform grouting-sweeping holes alternately, and at the same time, the thickness of tailing sand and cement accumulated on the hole wall after grouting is also different. Changes, the degree of density is not the same, the hardness is not the same, it is difficult to scan the hole

The existing technical solution is to use a drilling tool with a diamond drill bit to sweep the hole. This solution has several major disadvantages. First, it is not easy to match the carcass, the drill bit is too soft and easy to consume, and the cost of sweeping the hole is high; Second, due to the unevenness of softness and hardness due to the different density of the deposits in the well, it is easy to cause a hole deviation accident; third, because the contact area of ​​the drilling tool is too large, and there are many tailings and cement blocks in the hole, it is not conducive to water delivery, and it is easy to Accidents caused by drilling or burning

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