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In the directional drilling process of trenchless drilling rigs, the drill bit moves in two ways, reverse drilling and only pushing. When reverse drilling, the direction does not change, and the orbit line is a straight line; when pushing, the law changes, and the orbit force is in the underground space curve. In this way, the entire drilling track is …

During the construction of trenchless drilling rigs, improper placement of the pipe joint sealing ring or damage to the pipe end due to uneven force will cause soil erosion, resulting in ground settlement and uplift. If the thixotropic mud anti-friction technology is used for pipe jacking construction, the leakage of pipe joints will also cause the loss of thixotropic mud, …

In the construction of long-distance pipe jacking by horizontal directional drilling rigs, the relay room assembly is placed at regular intervals to reduce the long-distance and large-tonnage jacking force in stages, and reduce the jacking force of the main jacking cylinder and the bearing force of the backrest of the working well. The oil cylinder seals are sealed with high …

Horizontal directional drilling rigs are becoming more and more popular in modern construction because they have the advantages of fast construction speed, low construction accuracy, and low cost. They are widely used in pipeline laying construction projects such as water supply, gas, electricity, telecommunications, natural gas, and oil. Construction characteristics of horizontal directional drilling rig: 1. The directional drilling crossing …

Horizontal directional drilling rig is a construction machine that lays a variety of underground utilities (pipes, cables, etc.) without excavating the ground surface. It is widely used in flexible pipelines such as water supply, electricity, telecommunications, natural gas, gas, and oil. In paving construction, it is suitable for sand, clay, and other ground conditions. The composition structure of the horizontal …

The horizontal directional drilling method is a technique that uses drilling equipment installed on the ground to drill into the formation at a small incident angle relative to the ground to form a pilot hole, and then expand the pilot hole to the required size and lay the pipeline. Compared with other non-excavation technologies, horizontal directional drilling technology has the …

Commonly used horizontal directional drilling steering positioning method is used to measure the angle and position information of the drilling tool while directional drilling underground. This method completes the measurement by setting up a sensing transmitting probe in the steering drilling tool, setting up a walking positioning tracker on the ground, and setting up a driller monitor on the drilling …

The structure of the power head of the horizontal directional drill is generally driven by a high-speed motor to drive the reducer, the reducer drives the power head, and the output shaft of the reducer drives the drill rod to rotate, and the output shaft is hollow. The power head has the following functions: driving the drill bit to rotate; …

1. Project overview The project laid a 63m long, 24-hole telecommunications pipeline in a certain city. This road has a large traffic volume, the road is concrete, and the thickness is about 30cm. Below the concrete cushion, the thickness of the miscellaneous fill is not large, mainly the Quaternary soil layer, and the stratum is rich in water content. As …

What are the methods of trenchless pipeline detection? How should it be applied? Detection method selection According to the detection task and purpose, combined with the field survey and field working conditions, the geophysical prospecting method of this project is selected. 1. Electromagnetic induction method Metal pipelines generally have a medium strength or above (the K value is generally 100×4π×SI～1000×10-6×4π×SI), …

The use of horizontal directional drill crossing technology for pipeline crossing construction is an ideal construction method for completing water and electricity pipeline network construction and communication optical cable laying under the principle of not destroying the landform and protecting the environment in urban municipal construction. In the past ten years, horizontal directional drilling crossing technology has been widely used …

The mud made of non-excavation mud bentonite has a certain protective effect on the borehole wall, and is an indispensable raw material in the construction of the top-drawing pipe. At the same time, bentonite also plays a role in lubricating and maintaining drilling tools and carrying drill cuttings. Therefore, the trenchless mud bentonite is of great significance to the smooth …