The provided services consist in the realization of drilling constructions across the Po River for the oil pipeline Genoa Lacchiarella-10" in Mezzana Rabattone, Pancarana and Cervesina municipalities in the district of Pavia. During the construction a new system, the so-called Controlled Horizontal Drilling (CHD), has been used. The construction has been requested due to the lowering of the bottom level and the presence of a riverbed joint which were not meeting the requested safety conditions.
The CHD procedure consists of two phases: The first involves the drilling of a small diameter pilot hole along a predetermined direction. The second involves the enlargement of the pilot hole to a diameter allowing the setting of the new pipeline through a laying and pulling process. After the drilling, the pipeline is assembled on a guide rail (or truck rolls) and the laying is carried on.
