In 2000 CEMIR srl entered the world of horizontal directional drilling and, over the years, has equipped itself with important Drilling Machines, equipment and systems.
FIELDS OF APPLICATION
The directional drilling system allows the installation of metal or HDPE (high density polyethylene) pipes, used in the construction of aqueducts, gas pipelines, sewers and power lines, recovering and / or replacing sections of existing pipes without resorting to open excavations, avoiding the invasive breaking of surfaces such as roads, inhabited centers and facilitating the crossing of canals, rivers, airports, railways and woods. Pre-established routes are created and the arrival points are reached precisely, with routes that can exceed 500 meters. The preliminary investigation of the subsoil, through GEORADAR (optional), allows to identify existing underground services and soil lithology that can influence the drilling, furthermore they allow us to prepare the site in a targeted way, maintaining the high speed and safety characteristics of this technology .
ADVANTAGES OF TECHNOLOGY
The advantages of directional drills are many
SAFETY
In the construction site management it allows to reduce the costs of risk prevention measures related to the laying of pipes in excavations at great depths, in landslides or under water table.
SPEED
This processing is practically independent of the atmospheric conditions, requires very little movement of the land, so it will not be necessary to create material deposits and / or incur transport and storage costs in landfills. The executive speed also acts on the reduction of atmospheric and acoustic pollution.
DURABILITY AND PRESERVATION
In the execution of horizontal drills are used pipes of materials resistant to traction, improving the durability of the pipeline, in addition to preserving the characteristics of road surfaces and foundations.
OPERATIONAL PHASES
EXECUTION OF THE PILOT HOLE
The first phase identifies what will be the laying path of the pipeline, by means of a radio receiver the instrumentist guides the Drilling Head following the pre-established slope and trajectory, with each new rod inserted in the ground they are detected and, if necessary, corrected, the parameters to reach the established goal. During this phase, polymers and bentonite pheasants are pumped into the perforation to soften the soil for the subsequent reaming phase. This operation can also be performed in rocky terrain with the application of a Mud Motor. Through the pressure of the sludge pumped inside a turbine a series of tools are activated that crush the rocks.
REAMING
After making the pilot hole, replace the Drilling Head (or the Mud Motor), with reamers of increasing diameter, proceeding backwards, these tools allow to widen the pilot hole until reaching the diameter necessary for laying the pipe.
PIPE SHOOTING AND LAYING
Once the reaming phase is complete, the pipe (or bundle of pipes) is connected to the reamer (which in this phase has only the function of cleaning the hole) by placing it inside the opening made.