Drill bit with removable inner core for drilling

Abstract

The invention relates to a drill bit with a removable inner core for drilling. In the prior art, the drill bit has an integral type structure, and cannot directly convey articles to a drilling hole of a collapsed stratum through a through hole in a drilling rod; if the integral type drill bit is completely abandoned at the hole bottom, and the articles are conveyed to the drilling hole through the through hole in the drilling rod, the cost is too high, and subsequent construction can be affected; and after the drill bit and the drilling rod are taken out, the drilling hole is easy to collapse, the success ratio is low, and the operation is troublesome. The drill bit with the removable inner core for drilling consists of an outer drill bit, an inner core drill bit, a steel ball and a spring, and after being stressed by certain pushing force, the inner core drill bit can be separated from the outer drill bit. Therefore, the drill bit with the removable inner core for drilling has the characteristics of simple structure, less abandoned parts, low cost, high reliability, convenient operation, and the like.

Description

technical field [0001] The invention relates to drilling tools, in particular to a detachable drill bit for drilling. Background technique [0002] At present, it is very difficult to transport items to the borehole in the drilling construction of the easily collapsed bottom. The drill bit is an integral structure, and the items cannot reach the hole through the drill pipe; High and affect the follow-up construction; the method of taking out the drill bit and the drill pipe and then transporting the goods is limited by the easy collapse of the drilling hole, the operation is troublesome and the success rate is very low. Contents of the invention [0003] The object of the present invention is to provide a detachable inner core drill bit for drilling which is convenient to operate, practical and reliable. [0004] In order to achieve the above object, the technical scheme adopted in the present invention is: [0005] The core detachable drill bit for drilling is special i...

AI Technical Summary

Problems solved by technology

[0002] At present, it is very difficult to transport items to the borehole in the drilling construction of the easily collapsed bottom. The drill bit is an integral structure, and the items cannot reach the hole through the drill pipe; High and affect the follow-up construction; the method of taking out the drill bit and the drill pipe to transport the goods is limited by the easy collapse of the drilling hole, the operation is troublesome and the success rate is very low

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