Underground coal mine directional long drilling recyclable fixed-point grouting device

Abstract

The invention discloses an underground coal mine directional long drilling recyclable fixed-point grouting device. The recyclable fixed-point grouting device is composed of a large-diameter drill rod, a rubber plug, a small-diameter drill rod, a metal plug, a bypass water tool and a one-way valve, the rubber plug, the metal plug and the bypass water tool are all provided with through holes, the large-diameter drill rod is fixedly connected with the rubber plug, the small-diameter drill rod is in threaded connection with the metal plug, the one-way valve is fixed into a through hole in the metal plug, the small-diameter drill rod and the metal plug can freely pass through a through hole in the large-diameter drill rod, the metal plug can pass through a through hole in the rubber plug under the action of force to form sealing, and the small-diameter drill rod can penetrate through the bypass water tool to form simple sealing. The invention further discloses an underground coal mine directional long drilling recyclable fixed-point grouting method. Deep hole fixed-point grouting of a directional long drill hole can be achieved, directional drilling difficulty and even drill hole scrapping caused by local hole section stratum breakage are avoided, and the hole forming rate and the hole forming efficiency of the directional drill hole are improved.

Description

Technical field [0001] The present invention relates to directional drilling underground mine, and more particularly, to a coal mine directional drilling long recyclable pointing grouting apparatus and method. [0002] technical background [0003] With the development of coal mine directional drilling technology and equipment, directional drilling its trajectory control, high precision drilling, effective long distance, etc., applied to coal mine gas drainage, water damage prevention, geological exploration, and many other abnormal body areas, the protection of mine safety and efficient production play an important role in promoting. [0004] Directional drilling underground mine strata Art different purposes and different sets borehole formed technology solutions to meet the basic needs of conventional drilling directional drilling, the formation of complex formation for directional drilling the aperture segment drilling large curvature, large when the diameter reaming, grouting...

AI Technical Summary

Problems solved by technology

[0004] Underground directional drilling technology in coal mines has formed several sets of technological solutions for drilling holes in different formations and different purposes, basically meeting the needs of conventional directional drilling, and forming a large-curvature drilling, large-scale Technical measures such as diameter reaming and grouting reinforcement have basically solved the problem of directional drilling at the orifice section in complex formations. The branch method cannot make the drilling trajectory completely avoid the non-target layer, which leads to drilling difficulties, and even the drilling is scrapped in severe cases. The method of grouting reinforcement requires grouting from the hole to the whole hole, which not only wastes the The effective drilling of the front section after the completion of construction also seriously affects the efficiency of drilling construction and increases the cost of drilling

[0005] The key to implementing fixed-point grouting for directional drilling in underground coal mines is to isolate the grouting hole section from the non-grouting hole section. Currently, the packer used in the field of oil drilling is relatively mature, and is generally used for water injection or gas injection. And the structure is relatively complicated, and the manufacturing process is also relatively complicated, so it is not suitable for direct application in coal mine grouting operations

[0006] For this reason, the designer of the present invention is in view of the needs of fixed-point grouting for directional long boreholes in coal mines and the existing problems at present. Downhole directional long drilling recyclable fixed-point grouting device and method, realize directional long drilling fixed-point grouting and device recovery and reuse, solve the difficult problem of directional long drilling and deep hole drilling in local complex strata, improve coal mine underground directional long drilling Porosity formation rate, pore formation efficiency and formation adaptability in complex strata

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