What is Horizontal Directional Drilling?

Horizontal directional drilling rig is a construction machinery for laying various underground public facilities (pipelines, cables, etc.) without excavating the surface. Widely used in water supply, electricity, communications, natural gas, gas, oil and other flexible pipelines. During laying construction, it is suitable for sandy soil, clay, etc., but not suitable for high groundwater level and pebble stratum. Most of the non hard rock areas in China can be constructed. The working environment temperature is -15 ℃ ~ 45 ℃. Horizontal directional drilling technology is a new construction technology that combines the petroleum industry directional drilling technology with the traditional pipeline construction method. It has the advantages of fast construction speed, high construction precision and low cost. Widely used in water supply, gas, electricity, communications, natural gas, oil and other pipeline laying construction projects. Horizontal directional drilling equipment has also developed rapidly in more than ten years and has become an emerging industry in developed countries. Its development trend is to large-scale, miniaturization, adapt to hard rock operations, self-contained anchoring system, drill pipe automatic stacking, drill pipe connection automatic lubrication, shockproof system and other automatic operation functions, ultra-deep guidance monitoring, wide application range and other characteristics of development. This type of equipment is generally suitable for steel pipes and PE pipes with a diameter of φ300 ~ φ1200mm. The maximum pipe laying length can reach 1500m. It is suitable for a variety of soil conditions from soft soil to hard rock, and has broad application prospects.

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