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Down-the-hole hammer reverse circulation pipe-following drill bit suitable for large-diameter drilling

A down-the-hole hammer and reverse circulation technology, which is applied to drill bits, earthwork drilling, drilling equipment, etc., can solve the problems of difficult construction, frequent accidents, and low efficiency, and achieve good slag discharge effect, high structural strength, and reverse circulation high efficiency effect

Pending Publication Date: 2020-04-17
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the existing problems of construction difficulty, long construction period, low efficiency and frequent accidents in the construction of large-diameter engineering piles in complex strata, and provide a kind of latent pile suitable for large-diameter drilling. Hole Hammer Reverse Circulation Follow Pipe Drill Bit

Method used

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  • Down-the-hole hammer reverse circulation pipe-following drill bit suitable for large-diameter drilling
  • Down-the-hole hammer reverse circulation pipe-following drill bit suitable for large-diameter drilling
  • Down-the-hole hammer reverse circulation pipe-following drill bit suitable for large-diameter drilling

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Embodiment Construction

[0028] see Figure 1 to Figure 6 Shown:

[0029] The down-the-hole hammer reverse circulation pipe drill bit suitable for large-diameter drilling provided by the present invention includes an upper bit body 1 and a lower bit body 2, wherein the lower bit body 2 is hung on the lower part of the upper bit body 1, and the upper bit body 1 The central channel 3 is provided in the middle part of the lower drill body 2, the lower part of the upper drill body 1 is provided with a groove 4, and the top of the lower drill body 2 is provided with a convex shaft 5, and the groove 4 corresponds to the shape of the convex shaft 5. The protruding shaft 5 is inserted in the groove 4. The diameter of the groove 4 is larger than the outer diameter of the protruding shaft 5. The protruding shaft 5 can slide in the groove 4. When the protruding shaft 5 slides and abuts against one end of the groove 4 At this time, the bottom of the lower drill body 2 moves out of the outer edge of the drilling ...

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Abstract

The invention discloses a down-the-hole hammer reverse circulation pipe-following drill bit suitable for large-diameter drilling. The down-the-hole hammer reverse circulation pipe-following drill bitcomprises an upper drill bit body and a lower drill bit body, wherein the lower drill bit body is hung on the lower part of the upper drill bit body, central channels are formed in the middle part ofthe upper drill bit body and the middle part of the lower drill bit body, a groove is formed in the lower part of the upper drill bit body, a raised shaft is arranged at the top end of the lower drillbit body, the shape of the groove corresponds to the shape of the raised shaft, the raised shaft is inserted in the groove, the hole diameter of the groove is larger than the outer diameter of the raised shaft, the raised shaft can slide in the groove, and when the raised shaft slides and abuts against one end of the groove, the bottom of the lower drill bit body moves out of the outer edge of adrilling tool to realize reaming drilling. The down-the-hole hammer reverse circulation pipe-following drill bit has the beneficial effects that downhole double slag suction channels are arranged andmatched with involute type slagging guide grooves in the bottom surface of the drill bit, the reverse circulation efficiency is high, impact energy efficiency of a down-the-hole hammer is high, the slagging effect is good, meanwhile, ball teeth on the edge of the bottom surface of the drill bit are densely arranged, and the service life of the drill bit is effectively prolonged in combination withgood slagging conditions.

Description

technical field [0001] The invention relates to a down-the-hole hammer reverse circulation following pipe drill bit, in particular to a down-the-hole hammer reverse circulation pipe following drill bit suitable for large-diameter drilling. Background technique [0002] At present, in geotechnical drilling and excavation engineering, complex strata such as broken, loose, leaking, and pebbles are often encountered. Under such conditions, construction of engineering pile holes, especially large-diameter pile holes, is difficult to drill and has a long construction period. , Low hole forming efficiency, frequent accidents in the hole. The down-the-hole hammer follow-up drilling technology is a drilling method that combines bottom expansion drilling with air down-the-hole hammer and synchronously follows the casing. For drilling with a slightly larger pipe diameter, the down-the-hole hammer hammers the casing shoe at the same time to make the casing follow up synchronously, so a...

Claims

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Application Information

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IPC IPC(8): E21B10/36E21B10/38E21B10/40E21B10/46E21B10/62
CPCE21B10/36E21B10/38E21B10/40E21B10/46E21B10/62
Inventor 郑治川戚波陈宝义曹品鲁郭乃铭杨合博坤殷其雷
Owner JILIN UNIV
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