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Tracking boring crown

A drill bit and pilot drill bit technology, which is applied in the field of tracking drill bits, can solve problems such as the inability of the drill bit to jack up, and the pebbles stuck between the drill bit and the drill pipe, so as to improve convenience, speed up the drilling depth, and prevent jamming.

Active Publication Date: 2017-02-22
CANGZHOU GREAT DRILL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Now in non-excavation construction, when pebbles are encountered, due to the presence of sand and pebbles in the pebbles, the pebbles are easy to form pebbles at the drill bit and concentrate on the drill pipe under the rotation of the drill bit, causing the drill bit to be unable to jack. Larger than the drill pipe, it is easy to be stuck by pebbles between the drill bit and the drill pipe during the withdrawal process
Current technology cannot solve this problem

Method used

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Examples

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Embodiment Construction

[0018] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0019] Such as Figures 1 to 3 Shown, a kind of tracking drill bit comprises the first drill rod 1, the first drill bit 2, the double-hole tracking seat 3, the second drill rod 4 and the second drill bit 5, and the upper through hole is arranged on the said double-hole tracking seat 3 and the lower through hole, the upper through hole is above the lower through hole; one end of the first drill rod 1 is connected to the drill body, and the other end passes through the lower through hole and the first drill bit 2 Fixedly connected; one end of the second drill rod 4 is connected to the drill body, and the other end is fixedly connected to the second drill bit 5 through the upper through hole; the drill body drives the ...

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Abstract

The invention relates to a tracking boring crown. The crown comprises a first boring stem, a first boring crown, a double hole tracking seat, a second boring stem and a second boring crown. An upper through hole and a lower through hole are placed on the double hole tracking seat. The upper through hole is located above the lower through hole. One side of the first boring stem is connected with a boring machine body. The other side of the boring stem passes through the lower through hole and is connected fixedly with the second boring crown. One side of the second boring stem is connected with the boring machine body. The other side of the second boring stem passes through the upper through hole and is connected fixed with the second boring crown. The boring machine body drives the first boring stem and the second boring stem respectively to rotate. The first boring stem drives the first boring crown to rotate. The second boring stem drives the second boring crown to rotate. Compared with the prior art, the boring crown can conduct boring operation in the areas with both sand and pebbles, accelerate the boring speed and boring depth, and make the boring crown recovery easier.

Description

technical field [0001] The invention relates to the technical field of drilling rigs, in particular to a tracking drill bit for drilling an area mixed with sand and pebbles. Background technique [0002] Now in non-excavation construction, when pebbles are encountered, due to the presence of sand and pebbles in the pebbles, the pebbles are easy to form pebbles at the drill bit and concentrate on the drill pipe under the rotation of the drill bit, causing the drill bit to be unable to jack. Larger than the drill pipe, it is easy to be stuck by pebbles at the drill bit and the drill pipe during the withdrawal process. Current technology cannot solve this problem. Contents of the invention [0003] The purpose of the present invention is to provide a tracking drill bit. The technical problem to be solved is: how to drill holes in the area where sand and pebbles exist simultaneously, speed up the drilling speed and depth, and facilitate the withdrawal of the drill bit. [00...

Claims

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Application Information

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IPC IPC(8): E21B7/00E21B10/42
CPCE21B7/00E21B10/42
Inventor 黄成博潘文飞周旭明
Owner CANGZHOU GREAT DRILL
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