A drill bit for extracting broken rock core

Abstract

The invention discloses a drill bit for extracting broken rock cores. By adoption of the drill bit for extracting the broken rock cores, the problem that the cores cannot be taken out due to the fact that the rock cores are broken is solved. Steel bars are distributed in annular symmetry and arranged in a drill bit body so that the drill bit body can be used for extracting the broken cores, and the rock cores can be effectively prevented from falling into a drill hole. According to the technical scheme of the drill bit for extracting the broken rock cores, the drill bit comprises the drill bit body, the drill bit body is in a hollow cylindrical shape, and the lower end of the inner wall of the drill bit body is provided with a ring-shaped step-shaped end surface; a plurality of evenly-distributed grooves are formed in the top surface of the ring-shaped step-shaped end surface in a ring-shaped mode, the steel bars with different lengths are hinged into the grooves, and the diameters of the steel bars are smaller than the widths of ring-shaped steps; and the steel bars are distributed in central symmetry relative to the drill bit body, and the lengths of every two steel bars symmetrical to each other are identical.

Description

technical field [0001] The invention relates to a drill bit for extracting broken rock cores. Background technique [0002] Drilling and coring is an important part of engineering geological survey. In the process of engineering geological survey, the geological conditions encountered are different, and the difficulty of coring is also different. Whether the core can be extracted smoothly is a It is an important link to distinguish the geological conditions of the surveyed area, which is also related to the accuracy of the survey information and plays a vital role in the safety of the project. When encountering a broken zone or a stratum with a relatively broken core, the traditional drill bit cannot take out the core, and the frequent phenomenon that the core cannot be taken out makes the judgment of the stratum misjudgment, etc., and the accurate stratum information of the survey area cannot be obtained. , and even affect the safety of the entire project; therefore, how t...

AI Technical Summary

Problems solved by technology

When encountering a broken zone or a stratum with a relatively broken core, the traditional drill bit cannot take out the core, and the frequent phenomenon that the core cannot be taken out makes the judgment of the stratum misjudgment, etc., and the accurate stratum information of the survey area cannot be obtained. , and even affect the safety of the entire project; therefore, how to extract the broken core to obtain accurate stratum information and provide accurate survey reports to the project is very important

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