Horizontal drilling

Even more of electricity distribution is being located underground. A good solution to the implementation is to use unexcavated technology. Doing this will help to maximize the amount of cable network with the same amount of money. Underground drilling is a useful solution especially in high density areas, because it will reduce the amount disturbance and will be done in a rapid manner.

The use of unexcavated technology is usually the profitable choice, if a cable has to be dragged across a field. It also saves time, as it takes only one tenth of the time that many other solutions consume. In addition to all this, the installment can be made within a cultivation season.

A high voltage cable is always installed into a shielding pipe. Depending on the method of underground drilling, the pipe can be made out of either steel or plastic. A drilling device is always chosen considering the type of the ground and soil.

It is easy to drill across a road, a street, a railway, a yard or a park from underneath by using underground drilling methods, no matter what the soil - sand, moraine or rock. Depending on the method, when drilling underneath roads or railways it is typical to use steel or plastic as a material of the shielding pipes.

In hammer drilling, a hole will be piped simultaneously with a steel pipe (if the rock is properly solid, these steel pipes will not be needed). The seams will be weld, which results as firm and solid cover for the stream pipe.

Because there aren't too many junctions in the water pipes between city boroughs, it is ideal to use directional drilling without shielding pipes. When installing sewer pipes by directional drilling, the pipes are typically manufactured out of synthetic materials. In case of an ideal type of soil, gradient sewers with almost 1 mm gradience, can be made with directional drill. The distance between purifying wells lengthens and therefore the use of unexcavated technology will result as more profitable.

District heating pipes are usually large twin pipes. The pipe itself is made out of rather inflexible steel which may restrain the installment with a directional drill. Previously these heating pipes were installed into a shielding pipe but if geotechnic circumstances allow, it comes in favor to leave it off. Underground drilling is widely worthy no matter what the method. 

District cooling is rapidly becoming more common. The installment is quite similar to the installment of water pipes. Most often two unsealed pipes will be laid in the ground next to each other. It might be more difficult to install steel pipes since they're less flexible as a material than plastic ones.

When building a broad across-the-country network, light -cable is always shielded with a plastic pipe by using a special broadband channeling. It is convenient to install multiple shielding pipes at once when unexcavated technology is being used. This will spare the costs and time because in this way more cables can be installed later on if needed. In high density areas such as cities, underground drilling is the most convenient solution as it minimizes the amount of disturbance and can be done in a rapid manner.

The most typical method of underground drilling of these pipes and cables is moling (uses airpressure for the installment of a 50-110 mm shielding pipe) or directional drilling. Steel pipes can be used if the type of the soil so requires and they can be installed with a hammering drill or StyroRock-method (directional drilling of a solid rock).

Unexcavated technology can also be used for the installment and construction of gas pipes, especially if these pipes will be used for long-distance gas transitioning at high pressure.

The installment of a steel pipe can be done with directional drill but using steel pipes brings limits to flexing the pipe line into directions. If drilling underneath roads and railways a separate shielding pipe will be needed and it can be installed with a hammer drill or by ramming.