Drilling under Route 15, New Brunswick, Canada
Length drilled: 110 metres (rock)
Hole diameter: 760 millimetres
Conduit installed for the passage of natural gas
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Horizontal drilling makes it possible to install conduits under obstacles, regardless of the nature of the soil or rock. A rotating drilling head is used to pierce and reduce the rock (or soil) into cuttings. Before beginning this type of drilling, an entry pit and an exit pit must be dug to the required depth. It should be noted that it is possible to drill at a required grade, but it is impossible to perform a curbed trajectory (as can be done with horizontal directional drilling).
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