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Horizontal Directional Drilling

Horizontal Directional Drilling (HDD) is a trenchless construction technique used to install underground pipes, conduits, and cables. It is commonly used to install pipelines in areas where there are obstacles such as rivers, roads, and buildings. With HDD, a drill bit is launched from a launch pit and steered underground along a predetermined path to a target pit. As the drill bit is steered, a reamer attached to the drill bit enlarges the borehole to allow for the installation of the pipeline. HDD is widely used in the oil and gas, telecommunications, and municipal water/sewer industries.

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