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Pneumatic down-the-hole hammer horizontal directional drilling system and construction method thereof

A horizontal directional, DTH hammer technology, applied in directional drilling, drilling equipment and methods, drilling equipment and other directions, can solve the problems of inability to achieve orientation, inability to apply horizontal directional drilling, etc., and achieve long service life and cost saving. Effect

Pending Publication Date: 2020-09-08
廊坊市穿山甲工程机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current construction method of pneumatic down-the-hole hammer is the highest efficiency of rock-breaking drilling in medium-hard rock formations, but usually pneumatic down-the-hole hammers are used for vertical drilling, and horizontal directional drilling is very different from vertical well drilling. Not only drilling but also orientation is required, the existing pneumatic down-the-hole hammer cannot meet the above requirements
Ordinary down-the-hole hammers are not suitable for horizontal directional drilling, because they all rotate clockwise in the same direction during drilling, and orientation cannot be achieved

Method used

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  • Pneumatic down-the-hole hammer horizontal directional drilling system and construction method thereof
  • Pneumatic down-the-hole hammer horizontal directional drilling system and construction method thereof
  • Pneumatic down-the-hole hammer horizontal directional drilling system and construction method thereof

Examples

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Effect test

Embodiment 1

[0038] A construction method of a pneumatic down-the-hole hammer horizontal directional drilling system, comprising the following steps:

[0039] (1) When drilling the pilot hole 8 in weathered rock formations and rock formations below medium hardness, an oblique palm type cemented carbide pilot bit is used. The drilling rig is driven to apply drilling pressure to the drill pipe, the down-the-hole hammer starts to work, and the drill bit alloy impacts the rock surface to break the rock.

[0040] (2) If the drill pipe is rotated 360 degrees in all directions, it will be drilled in a straight line, and the situation at this time is similar to that of ordinary rock drilling. If the drill rod does not rotate, the drill bit will stay in place to repeatedly break the rock, and the rock powder cannot be effectively discharged from the bottom of the hole, and the footage cannot be formed at this time.

[0041] (3) Operate the drilling rig to make the drill pipe drive the pilot bit to...

Embodiment 2

[0048] A construction method of a pneumatic down-the-hole hammer horizontal directional drilling system, comprising the following steps:

[0049] (1) In medium-hard rock to hard rock formations, round full-section cemented carbide pilot bits should be used. When this kind of drill bit is used for pilot hole drilling, it must be matched with a deflecting elbow. The curvature of the deflecting elbow is shown in Table 2, so as to perform deflecting drilling.

[0050] (2) If the drill pipe is rotated 360 degrees in a full circle, it will be drilled in a straight line. At this time, the situation is similar to that of ordinary rock drilling. If the drill pipe does not rotate (similar to non-excavation pilot hole drilling in the soil layer), the pilot bit will stay in place and repeatedly break the rock, and the rock powder cannot be effectively discharged from the bottom of the hole, and the footage cannot be formed at this time.

[0051] (3) Operate the drilling rig to make the d...

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Abstract

The invention discloses a pneumatic down-the-hole hammer horizontal directional drilling system. The pneumatic down-the-hole hammer horizontal directional drilling system comprises a shell, a drill rod, a shock-proof rod probing bin connected with the drill rod, a deflecting elbow connected with the shock-proof rod probing bin, a hammer body connected with the deflecting elbow and a guide bit connected with the hammer body, the guide bit is connected with the hammer body through a bit anti-dropping joint; the hammer body, the deflecting elbow, the shock-proof rod probing bin and the drill rodare all fixed into the shell, a positioning spline is arranged at the rear end of the bit anti-dropping joint and fixed into the front end of the hammer body, the camber of the deflecting elbow is 1.0degree or 1.5 degrees. According to the pneumatic down-the-hole hammer horizontal directional drilling system and a construction method thereof, a current conventional mud motor-bent sub constructiontechnology is changed, the drilling efficiency is improved by 5 times or above, mud is not required, energy is saved, the environment is protected, and the drilling efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of horizontal directional drilling, in particular to a pneumatic down-the-hole hammer horizontal directional drilling system and a construction method thereof. Background technique [0002] Horizontal directional drilling has a history of more than 20 years in our country, and the technology and equipment have been well developed. However, with the further development of my country's infrastructure, more and more pipelines need to be laid in medium and hard rock formations. Ordinary technology and equipment are difficult to implement in medium and hard rock formations, and the construction efficiency is low and the cost is extremely high. If the construction process of mud motors in ordinary soft rock formations is used, a large amount of mud will be consumed, and the treatment and dumping of mud will greatly pollute the environment, which is inconsistent with the current concept of environmental protection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B4/14E21B7/04E21B21/16
CPCE21B4/14E21B7/046E21B21/16
Inventor 张丕国陈波
Owner 廊坊市穿山甲工程机械有限公司