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Soft rock and soil layer jet flow guiding hole forming-chamfering-hole collapse preventing integrated drilling method

A technology for rock and soil layers and anti-collapse holes, applied in drilling equipment and methods, directional drilling, earthwork drilling and mining, etc., can solve problems such as hole collapse in soft strata, reduce trajectory deviation, and improve drilling efficiency , Improve the effect of hole quality

Inactive Publication Date: 2015-07-22
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing jet-guided drilling technology can solve the problems of straight-line drilling and directional drilling in soft formations, but it cannot solve the problem of hole collapse in the process of directional drilling in soft formations

Method used

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  • Soft rock and soil layer jet flow guiding hole forming-chamfering-hole collapse preventing integrated drilling method

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Embodiment Construction

[0056] The integrated drilling method of the soft rock-soil layer with jet-guided hole formation, hole expansion and collapse prevention of the present invention includes the following steps:

[0057] (1) Processing and testing the integrated drilling device for jet-guided hole formation in soft rock and soil-jet reaming-shotcrete anti-collapse hole.

[0058] An integrated drilling device for jet-guided hole-forming-jet reaming-spraying anti-collapse hole in soft rock and soil layers such as figure 1 Shown. 1 is the outer drill pipe, 2 is the slurry inlet channel, 3 is the drill pipe joint, 4 is the support piece, 5 is the inner drill pipe, 6 is the high-pressure water channel, 7 is the slurry nozzle, 8 is the jet reaming cutting nozzle, 9 is the front section of the drill bit, 10 is the jet-guided cutting nozzle, 11 is the high-pressure water inlet pipe, 12 is the slurry inlet pipe, and 13 is the rotary seal joint. During the drilling process, the drill rod is connected to the s...

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Abstract

A soft rock and soil layer jet flow guiding hole forming-chamfering-hole collapse preventing integrated drilling method comprises the following steps that firstly, a soft rock and soil layer jet flow guiding hole forming-jet chamfering-hole collapse preventing guniting integrated drilling device is machined and tested; secondly, drilling technical parameters are designed; thirdly, guniting collapse preventing slurry fluid is prepared, and the solidification performance of the slurry fluid is tested; fourthly, the integrated drilling device is installed; fifthly, integrated drilling work is carried out; sixthly, after the design depth is achieved, drilling is stopped, clean water is used for cleaning a guniting pipeline and a slurry liquid nozzle, and a rod bit is pulled out; seventhly, the drilling effect is detected. The drilling efficiency and the hole forming quality of a horizontal or oblique long drill hole in the ground and an underground soft rock soil layer are greatly improved, the construction time for the horizontal or oblique long drill hole in the soft rock soil layer is shortened, and collapse destruction time of the horizontal or oblique long drill hole in the soft rock soil layer is greatly prolonged; the drilling track deviation of the horizontal or oblique long drill hole in the soft rock soil layer is reduced.

Description

Technical field [0001] The invention belongs to the technical field of coal mine safety production, and in particular relates to an integrated drilling method for soft rock and soil layers with jet-directed hole formation, hole expansion and collapse prevention. Background technique [0002] It is more difficult to construct near-horizontal or inclined larger boreholes on the surface and underground soft rock and soil. The main reason is that during the construction process, the boreholes are easy to collapse while drilling, the amount of slag discharged is large, and there may be stuck and held drills. Accidents such as dropping of drills and other accidents result in low drilling efficiency. At the same time, after the construction of a nearly horizontal or inclined larger bore hole in a soft rock and soil layer, it is very easy to collapse in a short time and make the hole ineffective. In addition, in the process of drilling in soft rock and soil on the surface and undergr...

Claims

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Application Information

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IPC IPC(8): E21B7/04E21B7/18E21B7/28E21B33/13
CPCE21B7/04E21B7/18E21B7/28E21B21/00E21B33/13
Inventor 李定启
Owner HENAN POLYTECHNIC UNIV
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