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 …
I. Overview of the mud pump 1 Introduction The mud pump is a kind of reciprocating plunger pump, which converts the rotary motion of the motor into the reciprocating linear motion of the crosshead and the piston through the crank connecting rod mechanism, and compresses the low-pressure mud into high-pressure mud. During the construction of directional drilling, the mud with …
In trenchless construction, pipe jacking construction should be very common, and some small details of pipe jacking construction will be introduced next. What is pipe jacking construction? Pipe jacking construction is a non-excavation construction method. It is a pipeline burial construction technology with no or less excavation. It is an underground pipeline construction method developed after shield construction. It does …
1. What are the common problems in the construction of ultra-long-distance horizontal directional drilling through pipelines? (1) Steering construction: The main problem is that the instability of the drill pipe is difficult to control and the drilling trajectory is difficult to measure in real time. (2) During the reaming construction: there are dangers such as “holding the pole” and “collapsed …
1 Characteristics of directional drilling construction of long-distance pipelines Directional drilling through construction will not hinder traffic, will not destroy green space, vegetation, will not affect shops, damage and adverse effects on traffic, environment, surrounding building foundations. There is no water or underwater operation, it does not affect the navigation of the river, does not damage the dykes and riverbed …
Before starting the trenchless drilling rig, the following preparations must be made to ensure the smooth progress of the construction: 1. Construction site detection: use detection instruments to find out the direction, depth and nature of the original underground pipe network, and make a mark; 2. Check that the oil level of the hydraulic oil tank should not be lower …
In trenchless construction, some technical difficulties will be encountered during horizontal drilling. Generally speaking, these 11 aspects are included. 1. Stuck drill Sticking is a common technical difficulty in hole reaming. If stuck, analyze and identify the cause and then deal with it. 1. If the drill is stuck in contact with the underground pipeline, withdraw the drill bit, drag …
