Unlock instant, AI-driven research and patent intelligence for your innovation.

High-precision large-diameter horizontal hole drilling method

A large-diameter, horizontal hole technology, applied in drilling equipment and methods, drilling equipment, directional drilling, etc., can solve the problem of strict control of drilling horizontal accuracy, and achieve high drilling efficiency and high level accuracy

Active Publication Date: 2019-07-09
63653 FORCES PLA
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the above-mentioned projects, there is no strict control on the horizontal accuracy of the drilling

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-precision large-diameter horizontal hole drilling method
  • High-precision large-diameter horizontal hole drilling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The purpose of the present invention is achieved as follows: (1) Precise positioning. The laser total station, laser marking instrument, and digital level gauge are used to jointly control the azimuth, levelness and hole axis of the drill rig. Control accuracy: the error of the hole center point is less than 5mm; the axis level error is less than 1‰; the levelness error Less than 0.05. (2) Consolidation drilling rig. Four Φ25 anchor rods with a buried depth of more than 1m and basically the same direction as the borehole axis are arranged around the borehole. After the drilling rig is adjusted in place, the anchor rod is welded to the end of the drill boom, and the rear end of the drill boom is fixed by a steel structure . Ensure that after drilling, the drill arm of the drilling rig maintains a rigid and consolidated relationship with the drilling axis. (3) High-precision pilot hole drilling. ①Drill the pilot hole straight. Guide hole stable straight drilling tool ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a high-precision large-diameter horizontal hole drilling method, which is mainly applied to construction applications such as high-precision horizontal hole drilling and high-precision horizontal pipeline installation and crossing in engineering fields such as national defense, geology, water conservancy and municipal administration. The method comprises the following steps: (1) accurate positioning; (2) consolidation of a drilling machine; (3) guide hole drilling: a. guide hole stable straight drilling by using guide hole stable straight drilling tool combination, b.guide hole deviation rectification drilling by using deviation rectification drilling tool combination, and c, guide hole straight hole drilling by using straight hole drilling tool combination; (4) detection of axis of the guide hole: lifting the drill to detect the axis of the guide hole bare hole after drilling for about 2-3m; (5) accurately measurement of all axes of a drilled hole, and calculation of the total deviation of the axis of the drilled hole, and correction of the part, exceeding the standard deviation of the axis of the drilled hole, of the drilled hole by adopting a down-the-hole hammer impact deviation correction drilling method after local strong correction or local reaming; and (6) coaxial hole expanding drilling. The method has the advantages of being high in drillingefficiency and high in horizontal hole straightness and levelness precision.

Description

Technical field [0001] The invention is mainly used in construction applications such as national defense, geology, water conservancy and municipal engineering fields that require high-precision horizontal hole drilling, high-precision horizontal pipeline installation and crossing. Background technique [0002] Existing pipeline crossing projects for highways, railways and rivers are carried out by manual excavation or non-excavation rig series first drilling and then dragging the pipe. The drilling trajectory of this type of method is curved or partially linear, and they cannot complete the horizontal hole drilling construction that requires precise centering at both ends of the horizontal hole and is basically linear. [0003] Relevant documents have been inquired and it is shown that there are mainly the following patents and related literature reports on pipeline crossing projects in China. [0004] Xue Bo, the Second Engineering Bureau of Water Resources of Henan Province, intr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): E21B7/04
CPCE21B7/046
Inventor 不公告发明人
Owner 63653 FORCES PLA