Construction method for accurate locating small distance air face hole-drilling

A technology of precise positioning and construction method, applied in the field of drilling, can solve the problems of difficulty in precise positioning and smooth opening, difficulty in drilling and opening accuracy to meet the requirements of high-precision positioning, low porosity, etc., achieving easy reinforcement, High porosity and easy production

Inactive Publication Date: 2008-08-27
CHINA GEZHOUBA GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the construction of core drilling, due to the influence of factors such as the high hardness of the drilling object and the large swing force of the drill pipe, according to the conventional construction method, it is difficult to accurately locate and

Method used

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  • Construction method for accurate locating small distance air face hole-drilling

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Example Embodiment

[0018] Such as figure 1 As shown, the drilling method for accurately positioning small vacant surfaces of the present invention is implemented in four steps:

[0019] 1. Make a hole mold

[0020] According to the drill hole size, choose steel plate or section steel as the material for making the mold, and then drill holes on the section steel or steel plate according to the hole size; in order to facilitate the fixing of the hole position mold 3, the four corners of the steel feet 4 are welded and fixed hole.

[0021] 2. On-site hole placement

[0022] According to the requirements of the design drawings, use measuring instruments to release the center line of each hole position and clearly identify it.

[0023] 3. Hole position mold is fixed

[0024] Position the hole mold accurately according to the on-site hole placement position to ensure that the center line of the positioning hole on the mold is aligned with the on-site hole center line, and then use the steel feet 4 welded ...

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Abstract

The invention discloses a construction method of precisely positioning minor distance free face drilling, comprising the following steps of: selecting steel plate or profiled bar as the materials for making die according to the dimension of the aperture of a drill hole, drilling holes on the steel plate or profiled bar according to the aperture; pulling out and marking the center lines of each hole with a measuring apparatus according to requirements of design drawing; precisely positioning a hole die according to the position of the pulled center line of each hole on site so as to ensure the centerline of the positioned hole on the die to be aligned with the centerline of the hole on site, then fixing the holes with steel support feet welded on the hole die and using expansion bolts to fix the holes on a base plane so as to secure the die; mounting a core drill, placing a bit at a corresponding center of hole and drilling, a set of fixture is arranged on the drill pipe to avoid drill pipe swaying during drilling and pressing lightly and rotating slowly when drilling so as to reduce the vibration of the drill. The construction method solves the problem of low drilling rate of holes on free face with minor distance and poor precision of holes drilled and is an economical and practical drilling construction method.

Description

technical field [0001] The invention relates to a drilling method, in particular to a construction method for precisely locating small-distance drilling on the air surface. Background technique [0002] In the construction of core drilling, due to the influence of factors such as the high hardness of the drilling object and the large swing force of the drill pipe, according to the conventional construction method, it is difficult to accurately locate and achieve the purpose of smooth drilling, especially in small distances. When the empty surface requires very high positioning accuracy, the drilling accuracy is difficult to meet the high-precision positioning requirements, and the hole formation rate is very low. Contents of the invention [0003] The object of the present invention is to provide a construction method for precisely positioning small-distance drilling on the air surface, which can overcome the swing of the drill rod when the drilling rig is drilling, and ha...

Claims

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Application Information

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IPC IPC(8): E21B7/04E21B15/04
Inventor 程志华刘志文石义刚
Owner CHINA GEZHOUBA GROUP CO LTD
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