In recent years, with the continuous innovation and maturity of the trenchless repair technology for buried pipelines, more and more industrial enterprises choose to use the trenchless method to replace the traditional method of excavation and replacement of new pipes for pipeline repair and renewal. So how to choose the appropriate method among the wide variety of trenchless repair methods, …
Trenchless drilling rigs use high-pressure water jets to cut holes in soft ground. The directional drilling bottom drilling tool is composed of an elbow joint and a drill bit with a nozzle. Drill string back to straight hole. If the drill string does not rotate, under the action of feed force and water jet, a directional arc hole can be …
Underground pipelines play an important role in production and life. With the passage of time, due to corrosion, long operating years and other reasons, the pipeline will inevitably have various damages and leaks, so it needs to be repaired and even replaced. In addition, the whole line is replaced with new pipelines, which is not only a huge amount of …
With the aging and damage of the drainage pipes laid and used in the early stage, the trenchless repair of the pipes and the renewal of the pipes have gradually become the more prominent problems currently faced. With the continuous advancement of the modernization process, the underground pipelines have become increasingly complex, and the load of the roads has become …
With the wider application of trenchless horizontal directional drilling technology, there are more and more difficulties encountered in the construction of directional drilling. At present, most of the small drilling rigs used in the market use wireless positioning technology during the construction of pilot holes. This paper briefly introduces the design method of the pilot hole trajectory during the construction …
Municipal road drainage system is one of the important facilities to ensure the normal use of urban municipal facilities. Therefore, in the process of pipeline repair, ensuring the construction quality is a crucial aspect. However, in the process of pipeline repair, due to various reasons, some small problems will inevitably occur, such as water leakage in the pipeline. So what …
1. Research purpose and significance of trenchless repair technology for urban drainage pipelines The urban drainage pipe network is an indispensable and important infrastructure of a modern city, a basic industry that has an overall and leading impact on urban economic development, the backbone of urban water pollution control, urban waterlogging and flood control, and an important measure of the …
As we all know, UV curing repair is a widely used method in the current trenchless pipeline repair method. Ultraviolet light curing uses ultraviolet light as the curing medium, and the resin contains a photoinitiator. When irradiated with UV light of a specific wavelength, the resin undergoes a curing reaction to form a high-strength lined new tube. After curing, the …
The unilateral directional drilling inclined well crossing makes full use of the small size, short drill pipe, flexible operation, and easy direction control of small directional drilling rigs. The unilateral directional drilling inclined well crossing technology is the use of horizontal directional directional drilling technology to form inclined wells. It is a combination of horizontal directional drilling crossing and inclined …
Municipal road drainage system is one of the important facilities to ensure the normal use of urban municipal facilities. Therefore, in the process of pipeline repair, ensuring the construction quality is a crucial aspect. However, in the process of pipeline repair, due to various reasons, some small problems will inevitably occur, such as water leakage in the pipeline. So what …
