Advantages of Trenchless installation

What are advantages of trenchless technologies? Will they replace the traditional ones? Special report by World Pipelines and Natalya Kuznetsova, project director of Midstream Oil and Gas Congress MOGC 2019.

With pipeline infrastructure expanding, trenchless pipelaying technologies are starting to gain traction. Will horizontal directional drilling (HDD), microtunnelling, auger boring and Direct Pipe methods replace the traditional ones? Natalya Kuznetsova, Project Director of the Midstream Oil and Gas Congress 2019 explains what such techniques may offer to the market.

1. Reduced environmental impact

Trenchless pipelaying methods do not require invasive excavations and soil replacement, allowing the preservation of the landscape, the topsoil, and a decrease in the rehabilitation time. For example, HDD method includes one dig down at the beginning and at the end of the route. This means the pipelaying activities do not tear up the soil along the whole length of pipe, interrupt the development of buildings or infrastructure, and involve less equipment. Microtunnelling is often used together with vacuum extraction system and dust collectors. The Direct Pipe method focuses on a significant cut on generated slurry, and Auger Boring is known for its dry installation without the production of slurry.

2. High cost-effectiveness

  There is a need for solid investments in trenchless technologies, especially for large diameter pipe installation, but they quickly make up for the investment. Potentially, in comparison with traditional open cut methods, they could allow for a decrease in the expenses by half. They take less time, equipment, and manpower resources for installation; saving the money needed for infrastructure recovery.

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