According to sonic drill rig manufacturers, they identify sonic drill more as a rotary-vibratory drill. They are capable of executing high-speed drilling operation and also allows you to accomplish certain tasks such as continuous coring. No other equipment yet can carry out continuous coring, making it an exclusive functionality feature that you can get from a sonic drill.
At first glance, the initial impression you will get from it is that sonic type of drilling is much like any other conventional mud rotary drill rig. The primary distinguishing factor here is found in the drill head.
It is usually much bigger when compared to a standard rotary head. It usually contains the needed mechanism that is required for rotary motion. The same is true with the oscillator, which induces a superimposed frequency force on the drill string.
In addition to being rotated and pushed down, the drill bit would also vibrate, in an up and down fashion. Combining these three forces would allow drilling to proceed through any kind of geological formation, even though the many different types of rock.
In overburden, the vibratory action will eventually induce the surrounding soil particles to become fluid like in form which allows for easy and effortless penetration. In rocky formations, the drill bit may promote fractures at the surface.
This process will pave the way for the creation of rock dust and figments of rock particles, which is kind of favorable in the sense that it can help in facilitating seamless drill bit advancement.
Additionally, it is also an important necessity in most environmental drilling projects. Drill mud, compressed air, or plain water can be taken advantage of to help in the removal of the cuttings and further accelerate the drilling operation.
The hydraulic motor will drive the oscillator and make it run. It will also make use of out of balance weight in the production of sinusoidal forces that are relayed to the drill bit. It will also incorporate air spring to restrict the alternating forces towards the drill string.
The frequency may come in a variety of ways to suit the operating conditions, which is most of the time between 50 to 120 hertz or cycles per second.
For the sake of making a comparative analysis, current in most ordinary households in many different countries would alternate at 60 hertz. This range of frequency would fall in the lower sound range of vibrations which the human sense of hearing could pick up. Thus, coining the word “sonic drill” for this particular type of rotary-vibratory machine drill.
While the working principle behind sonic drill technology is giving us an impression that it is a bit complicated, the opposite of which is true. The machine is way too easy to operate.
If you happen to be a driller you will just need to add vibratory energy to your usual rotary motion. You may want to pick out a frequency that you know will give you the best drilling rate. Or perhaps the best core recovery operation.