Abstract
Advances in the field of material engineering, computerization, automation, and equipment miniaturization enable modernization of the existing technologies and development of new solutions for construction, inspection, and renovation of underground pipelines. Underground pipe installations are used in the energy sector, gas industry, telecommunications, water and sewage transport, heating, chemical industry, and environmental engineering. In order to build new pipeline networks, dig and no-dig techniques are used. Horizontal Directional Drilling (HDD) is one of the most popular trenchless technologies. The effectiveness of HDD technology application is mostly determined by its properly designed trajectory. Drilling failures and complications, which often accompany the application of the HDD technology, result from poor design of the well path in relation to the existing geological and drilling conditions. The article presented two concepts of Horizontal Directional Drilling well path trajectory design: Classic sectional, which is a combination of straight and curvilinear sections, and a single-section chain curve trajectory (catenary). Taking into account the advantages and disadvantages of the catenary trajectory relative to the sectional trajectory, the author’s solution was presented, which was the implementation of the sectional trajectory with a maximum shape similarity to the catenary trajectory. The new approach allowed us to take advantage of a chain curve trajectory and was easier to implement using the available technology. The least squares method, based on deviations from a catenary trajectory, was set as the matching criterion. The process of searching for a trajectory, being a combination of straight and curvilinear sections as similar as possible to a catenary-type trajectory, was carried out using two methodologies: State space search and a genetic algorithm. The article shows the pros and cons of both optimization methodologies. Taking into account the technical and technological limitations of HDD drilling devices, a new approach was proposed, combining the methodology of state space search with the genetic algorithm. A calculation example showed the application of the proposed methodology in an engineering design process.
Highlights
Every year, many kilometers of underground cables and wires are installed around the world.In the last century, water, gas, electricity, sewerage, telephone, and internet wires have become widely available goods to residents of large urban agglomerations, and to residents of small towns and villages
The article focuses on two concepts of Horizontal Directional Drilling (HDD) trajectory design: The classic one, which is a combination of straight and curvilinear sections, and a chain curve trajectory-catenary
An attempt was madeThe to create methodology of calculations optimization methods, into is account article afocuses on two concepts of HDDusing trajectory design: The classic taking one, which a combination straight and curvilinear sections, and chain curve trajectory-catenary
Summary
Many kilometers of underground cables and wires are installed around the world. The use trenchless technologies makesmakes it possible to accelerate investment execution compared compared to traditional excavation methods. Using drilling techniques in the construction of underground piping Some trenchless technologies, such as horizontal jacking, microtunneling, and Horizontal. One of the most commonly used technologies for constructing underground pipelines is HDD the existing ones have been modernized (HDD-intersect drilling) [2,3,4]. One of theversion most or commonly technologies constructing underground pipelines is HDD. The article focuses on two concepts of HDD trajectory design: The classic one, which is a combination of straight and curvilinear sections, and a chain curve trajectory-catenary. An attempt was madeThe to create methodology of calculations optimization methods, into is account article afocuses on two concepts of HDDusing trajectory design: The classic taking one, which a combination straight and curvilinear sections, and chain curve trajectory-catenary. The article develops the subject of HDD trajectory design presented in detail by the authors in theirTrajectory previous article [6]
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