Drilling execution is performed through a particular hollow rode equipped with a coiled spire whose ratio between wing height and the rod diameter varies between 20% and 35% . They combine thrust and rotation actions set on the operating machine. During the drilling performance, a compression of the soil  around the drilling element, is achieved (improvement of mechanical peculiarities) as well as a small removal of soils ranging between 20-40% of the theoretical volume of the drill (removal is made by rotation).
Once the drilling is completed, the rise is carried out with specific jets, a concrete mixture injections whose pressure ranges  between 15 and 30 BAR and the rise times are set according to the load capacity needs of the pile and of the soil,  thus obtaining higher diameters piles.