If you will ask sonic drill rig manufacturers anything about sonic drilling to help you understand this process and the underlying principles behind it, they will often tell you that it is a powerful penetration technique to dig into the earth. One of its highlight features is that it comes with a strong reduction of friction, which is actually a normal occurrence between the drill string and the drill bit which is brought about by liquefaction, inertia effects and the reduction of porosity of the soil. All these elements together, and you can dig deep into all types of ground soil.
The Mechanics of Sonic Drilling
By engaging the sonic drill head, you are bringing the entire drill string to a vibration frequency that is reaching up to 150 Hz. This will render the drill bit and string to lose hold of its structure. With this process, the friction between the soil and the drill is lessened, but not completely taken away, and becomes fluid and can be flushed or washed off with greater ease.
The drill bit and its vibrations will cause the soil to lose hold of its structure, changing in the process its porosity and density. This will render the cuttings and the soil to move and occupy the sample barrel and then go up the drill string, helping in a way the tooling advance freely.
The effects of inertia and liquefaction enable you to collect continuous and long samples.
The vertical movement of the drill string remains extremely straight and with very minimal deflection.
Less Power Translates Into Fewer Problems
Due to the lowered amount of friction on the drill string length, the sonic drilling now requires less power in order for it to obtain the same effect as that of conventional drilling. This is one unique characteristic of sonic drilling and it is helpful in keeping torsional forces to occur on the drill string.
Another sonic drilling advantage is the seamless retrieval of the drill string, even in the midst of boulders or quick expanding clays, or any other similarly difficult conditions that are a usual scenario in a drilling project. All casings, toolings and drilling rods are pulled easier and faster.
Sonic Drilling Equals Sonic Drilling
In some situations, you want to veer away from the use of drilling mud, water, or even air while drilling process is in the works. Engaging a sonic drilling project will not necessarily mean to say that you will require air or drilling mud when carrying out a drilling job. This explains the reason why sonic drilling is the method of choice for geo-construction, geotechnical, and environmental applications.
Like for instance, it is not very difficult for environmental projects to realize their goals for significant cost savings, but because they will use the sonic drilling method it becomes highly attainable and actionable.
Where traditional drilling methods persistently struggles when trying to obtain a continuous core sample from incoherent soil/ground formations. Sonic drilling is highly reputed for its ability to excel when it comes to boring and penetrating through mixed, soft, hard as well as many other types of overburdens.
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