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What is HDD (Horizontal Directional Drilling), and when would I use that method instead of bore and jack or microtunnel?

April 26, 2017bore directional Drilling HDD horizontal Jack method

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What is HDD (Horizontal Directional Drilling), and when would I use that method instead of bore and jack or microtunnel?

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HDD uses guided drilling for creating an arc profile. This technique is best used for drilling long distances to install smaller diameter (under 36-inch) pipelines or cables. The process involves three main stages: drilling of a pilot hole, pilot hole enlargement, and pullback installation of the carrier pipe.