Drill bit with removable inner core for drilling

A drill bit and inner core technology, which is applied in the direction of drill bits, drilling equipment, earthwork drilling, etc., can solve the problems of easy collapse of drilling holes, troublesome operation, low success rate, etc., and achieve the effect of less abandoned parts, convenient operation and simple structure

Inactive Publication Date: 2009-09-09
煤炭科学研究总院有限公司西安研究院
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  • Summary
  • Abstract
  • Description
  • Claims
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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

Method used

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  • Drill bit with removable inner core for drilling
  • Drill bit with removable inner core for drilling
  • Drill bit with removable inner core for drilling

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Embodiment Construction

[0013] see Figure 1-4 , the structure of the inner core detachable drill for drilling of the present invention comprises an outer drill 1, an inner core drill 2, a steel ball 3 and a spring 4, etc., and the inner core drill 2 is arranged before the boss 5 cooperating with the outer drill 1, The cross section of the inner core drill bit 2 is provided with a round hole 8, and the steel ball 3 and the spring 4 for fixing the position are arranged in the round hole 8; Slot 6. Relying on the annular groove 6, the keyway 7 on the outer drill bit 1, the round hole 8 on the inner core drill bit 2, the steel ball 3, and the spring 4 to realize the connection, and transmit the feeding force and torque during the drilling process. When it is necessary to transport items to the bottom of the hole, a certain thrust is applied to the inner core drill bit 2 to achieve separation from the outer drill bit 1 and the drill rod, and then the item is conveyed into the hole through the internal t...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/62E21B10/64
Inventor 殷新胜凡东姚克李泉新王毅莫海涛冀前辉孙保山李锁智
Owner 煤炭科学研究总院有限公司西安研究院
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