What is sonic drilling? According to the words of sonic drill rig manufacturers themselves, sonic drilling is an effective method of soil penetration. One highlighted feature of this drilling method is that it strongly reduces friction that is supposed to exist between the drill string and its drill bit. This is the friction brought about by liquefaction, lowered porosity level of the soil, and inertia effects.
The above-mentioned combination renders your soil penetrating efforts for a wide spectrum of soils easy and seamless, unadulterated. Besides, with this type of technology also, bedrock penetration rates are made faster than ever.
Inside the drill head is the oscillator, what it generates is resonant and high-frequency energy. It is directed towards the drill string. Whenever there is a drilling work going on, the resonant energy produced is blended with rotational movement. With this, the energy is evenly distributed, impacting the drill string and drill bit of tooling.
As for the drill operator, he has the power to control the level of sonic vibration that the drill head will produce. This will help match the force need to obtain an optimal penetration of the bedrock formations and the soil.
The drill bit vibrations will render the soil you are drilling on to lose structure, and thus will change its porosity and density. This will allow for the cuttings and soil to move up the drill and in the sample barrel so that your tooling can advance itself freely.
As for the inertia effects and liquefaction, it will allow you to continuous and long samples. The drill string is likely to stay extremely straight due to its vertical movement (high-frequency) with very little chance for deflection.
Fewer Problems with Less Power
The underlying reason why sonic drilling usually requires less power when it comes to achieving what traditional drilling can do is that it comes with a reduced level of friction as to the drill string length. This is one unique sonic drilling characteristic that keeps away torsional forces to appear on the drill string.
Another major benefit of a sonic high-frequency application is that it allows for greater ease in retrieving the drill string, despite the workings of the expanding boulders or clays and difficult conditions. All the casings, drilling rods, as well as tooling, they are pulled easier and faster.
Clean Drilling is Synonymous to Sonic Drilling
There would be instances that all you want to do is veer away from the use or dealing with drilling mud or even water during a drilling project. With sonic drilling, you are not necessitated to make use of drilling mud or air while drilling work is on the go. Hence, it easily became among the most preferred drilling method or the method of choice among geo-construction, geotechnical and environmental applications.
In some special projects, sonic drilling can run even in dry, overburden conditions.
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As for the environmental drilling projects, they can benefit from a significant amount of savings on their costs by employing this type of drilling method. With such kind of drilling projects, they usually require a significant amount of time to carry out the work and eventually money, otherwise, proper disposal of investigation-derived waste would be difficult.
Adding water, according to sonic drill rig manufacturers, in a mining project like that of a leach pad, can easily become a disturbance and would create an unnecessary impact on the soil’s mechanical properties. In extreme cases, this can bring about soil erosion and eventually lead to a partial landslide.