CN201351456Y - 导向扩孔钻头 - Google Patents

导向扩孔钻头 Download PDF

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Publication number
CN201351456Y
CN201351456Y CNU2009200221329U CN200920022132U CN201351456Y CN 201351456 Y CN201351456 Y CN 201351456Y CN U2009200221329 U CNU2009200221329 U CN U2009200221329U CN 200920022132 U CN200920022132 U CN 200920022132U CN 201351456 Y CN201351456 Y CN 201351456Y
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China
Prior art keywords
reaming bit
guiding
drill rod
reaming
utility
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Expired - Fee Related
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CNU2009200221329U
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English (en)
Inventor
王道刚
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Individual
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Individual
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Abstract

本实用新型公开了一种导向扩孔钻头,它是在一根钻杆前端10-20cm的位置周围焊接三个长梯形铁块,铁块上焊接硬质合金或金刚石。使用时,将本实用新型的导向扩孔钻头与钻杆连接,在已施工的钻孔中钻进,由于扩孔时钻杆头在前端起导向作用,不再发生偏斜现象。

Description

导向扩孔钻头
技术领域
本实用新型涉及地质钻具。
背景技术
在施工地质钻孔时,钻孔直径达不到设计要求时,需要对已施工的钻孔进行扩孔,普通的方法是更换孔径大一级的钻头。但在施工中往往出现扩大钻孔偏离原钻孔的现象,不仅造成了重复钻进,而且给下置孔内套管、孔口管等造成了困难。
发明内容
本实用新型为解决扩孔偏斜问题,提供一种导向扩孔钻头。
为解决上述问题,本实用新型采取以下技术方案:它是在一根钻杆前端10-20cm的位置周围焊接三个长梯形铁块,铁块上焊接硬质合金或金刚石。
本实用新型优点是:使用时,将本实用新型的导向扩孔钻头与钻杆连接,在已施工的钻孔中钻进,由于扩孔时钻杆头在前端起导向作用,不再发生偏斜现象。
附图说明
图1是本实用新型的主视图;
图2是图1的俯视图。
图中:1-钻杆;2-梯形铁块;4-硬质合金。
具体实施方式
如图1和图2所示,本实用新型导向扩孔钻头是在钻杆1前端10-20cm的位置周围焊接三个长梯形铁块2(见图2),铁块2上焊接硬质合金4。硬质合金4可用金刚石代替。

Claims (1)

1、一种导向扩孔钻头,其特征在于,它是在一根钻杆前端10-20cm的位置周围焊接三个长梯形铁块,铁块上焊接硬质合金或金刚石。
CNU2009200221329U 2009-02-17 2009-02-17 导向扩孔钻头 Expired - Fee Related CN201351456Y (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2009200221329U CN201351456Y (zh) 2009-02-17 2009-02-17 导向扩孔钻头

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2009200221329U CN201351456Y (zh) 2009-02-17 2009-02-17 导向扩孔钻头

Publications (1)

Publication Number Publication Date
CN201351456Y true CN201351456Y (zh) 2009-11-25

Family

ID=41374844

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2009200221329U Expired - Fee Related CN201351456Y (zh) 2009-02-17 2009-02-17 导向扩孔钻头

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CN (1) CN201351456Y (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104265178A (zh) * 2014-09-16 2015-01-07 四川省一三五勘察设计有限公司 扩孔刀具

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104265178A (zh) * 2014-09-16 2015-01-07 四川省一三五勘察设计有限公司 扩孔刀具
CN104265178B (zh) * 2014-09-16 2016-08-24 四川省美地佳源实业有限公司 扩孔刀具

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20091125

Termination date: 20120217