Horizontal directional drilling is a construction machine that lays a variety of underground public facilities (pipes, cables, etc.) without excavating the ground surface. Horizontal directional drilling is widely used in water supply, electricity, telecommunications, natural gas, coal gas, petroleum, etc. During pipeline laying construction, horizontal directional drilling is suitable for sand, clay, pebbles and other terrain conditions, and can be constructed in most non-hard rock areas in my country. The working environment temperature of horizontal directional drill is ℃~+℃. Horizontal directional drilling technology is a new construction technology that combines the directional drilling technology of the petroleum industry and traditional pipeline construction methods. Horizontal directional drilling has the advantages of fast construction speed, high construction accuracy, and low cost. Horizontal directional drilling It is widely used in pipeline laying construction projects such as water supply, gas, electricity, telecommunications, natural gas, and oil. Horizontal directional drilling equipment has also developed rapidly in more than ten years and has become an emerging industry in developed countries. At present, its development trend is towards large-scale and miniaturization, adaptability to hard rock operations, self-prepared anchoring systems, automatic stacking and extraction of drill pipes, automatic lubrication of drill pipe connections, anti-electric shock systems and other automated operation functions, ultra-deep guidance monitoring, Feature development such as wide range of applications. Horizontal directional drilling is generally suitable for steel pipes and pipes with a diameter of ~~, and the maximum pipe laying length can be reached. Horizontal directional drilling is suitable for a variety of soil conditions from soft soil to hard rock, and has broad application prospects
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