Definition - What does Directional Drill mean?
Directional drilling, in the context of trenchless construction, is the process of drilling under the ground with the help of equipment such as a horizontal drilling machine to allow pipelines for water and sewer mains to be installed. Directional drilling involves the drilling of a directional hole under the ground under controlled conditions by following a designed pathway. Directional drilling eliminates the need for open cut methods by allowing drilling under the ground in any direction desired.
Trenchlesspedia explains Directional Drill
An entry and exit point is about the only excavation required in directional drilling. The desired path to be followed by the directional drill is ascertained by carrying out extensive surveys of below ground soil conditions, the ground water table and utility pipelines and cables that run through the area. Directional drilling is carried out by trained and experienced personnel who guide the drill along the planned route. The drill bit also has a survey sensor to detect any obstructions in its path such as pipelines. Excavated material is carried out via the drilling fluid which also acts as a lubricant and soil stabilizer. As far as possible, the route is maintained to within a small permissible deviation,