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How Does Sonic Drill Work?

Posted on June 27, 2019 in Oil and Gas

Sonic Drill Technology

 How Does Sonic Drill Work?

Sonic drilling is an effective way to penetrate the soil. This is made possible by reducing the amount of friction that occurs on the drill bit and drill string by virtue of inertia effects,  liquefaction and the temporary reduction of soil porosity. All these factors together will make the drilling process on different types of soil, easy and seamless for our tooling and sonic rigs. Furthermore.  this technology allows for faster penetration rates in most types of bedrock.  

Sonic Mechanics

By engaging the drill head, you are actually taking the entire drill string to a vibration frequency of 150 Hz. This will cause a thin zone that is directly surrounding the bit and drill string to lose hold of its structure. This explains the reason why friction of the drill cuttings and soil is reduced and becomes fluid so that they can be flushed out or discarded off  from the borehole immediately with great ease. 

The drill bit vibrations will cause the soil to loosen up its structure and thus in the process will change its porosity and density. By this process, the cuttings and the soil in the sample barrel as well as up the drill string will eventually help the tooling to advance freely. 

The inertia effects and liquefaction will let you collect continuous and long samples. The drill string will remain extremely straight, with a slight deflection, because of its vertical,  high-frequency movement. 

Why Is Sonic Drilling  Valuable? 

  • Very much efficient with an extremely fast speed in penetration of the ground soil. 
  • Applying numerous types of samples 
  • Exceptional power output
  • Tooling penetration in a light-weight rig
  • Can be used even at severely polluted locations
  • Minimal smearing
  • Can extract high-quality samples, even in saturated soil layers
  • Pre-pack monitoring wells comes with a pre-shaped bentonite collars  
  • Low noise as opposed to the hammering element of probe rigs
  • Less wear and tear of casing threads compared to hammering
  • Casing threads have less wear and tear compared to hammering. 
  • Tiltable drill head  allows for easy handling of samplers

Fewer Problems, Lesser Power

Since the friction on the drill string is reduced, sonic drilling is now going to require less power in order to achieve the same conventional drilling effect. This is one of the unique attributes of sonic drilling that keeps the occurrence of drill string torsional forces at bay. 

Another key benefit of sonic high-frequency application is the great ease on drill string retrieval,  even if it is in boulders or expanding clays or in any other difficult situation. All rods used in drilling, tooling, and casing can be pulled off much easier and way faster.  

Sonic Drilling is Clean

There would be instances that you would not want to have anything to do with drilling mud, or perhaps even with water during a drilling process taking place. In sonic drilling, you don’t necessarily need drilling mud or air while the drilling process is taking place. 

With sonic drilling eliminating the need for water during a drilling job,  consequently it made this method a method of choice among geo-construction, geotechnical and even in environmental applications, too. Additionally, there are some special projects were sonic drilling was rendered so dry in overburden conditions. 

How Come Sonic Drill Is More Advantageous Than Traditional Drill Methods?

Posted on June 8, 2019 in Oil and Gas

 How Come Sonic Drill Is More Advantageous Than Traditional Drill Methods?

Compared to other drill techniques we now have, what makes the sonic drill more relevant and more advantageous? We may not qualify this technique as a brand new drill technology since it has been around for quite some time now, did you know that the industry up to this very day has remained to what we refer to as the “adoption phase”.

The adoption phase simply means that the contractors will need to educate their geotechnical, water well, mining and environmental clients regarding its nature, how it works, why it is more impacting and why it is a better choice of drilling technique compared to others. They need to help understand every important aspect about it first before they can fully employ it as a method of choice and not come across any form of resistance about it or going against it.  

Waste Reduction

By up to 80% of an entire drill process, waste can be reduced by implementing this type of drilling technique. It effectively removes slough by virtue of its casing advancement system. With this process in place, it allows for enhanced sample integrity even through dolomite, sand, limestone and many other unconsolidated materials.

Cleanest Method of Drilling

Sonic drilling technique does not necessitate the use of air or mud during the drilling process. This is one of the reasons why it has become the method of choice in geotechnical, geo-construction and for environmental applications, too.  

During the course of any mining project, air or water incorporated is likely to produce some kind of disturbance. This occurring can have a huge impact on the mechanical properties of the soil and thus would actually promote soil erosion. With this happening on the project site, it may induce partial landslide to happen.  

Lesser Issues with Lesser Power

Compared to other drilling techniques, sonic type of drilling requires less power. And despite all that, it can still manage to deliver the very same impact that traditional drilling methods are known to deliver. This also reduces the chances of torsional forces to occur on the drill string.

Sonic Drill is a Much Faster Method

By employing high-frequency resonance, the friction which is a usual occurrence observed between the encountered subsurface material and the core barrel can be reduced or mitigated in intensity. This allows for maximum core recovery to occur as well as to promote a more efficient penetration regardless of any condition of the subsurface.

Provides Relevant Information

Regardless of the soil formation that you have on your project site, sonic drilling method can still uniquely provide you with a relatively accurate core sample. It is good and has more value in it in the sense that it comes with unmatched quality.  Geologists, environmental scientists, and drillers will be able to determine exactly where the sample is extracted from considering the fact that will have 1% less deviation.

Conclusion:

We are qualifying sonic type of drill as an inherently cleaner, more environment-friendly way to drill the earth’s surface, the reason being that it is likely to produce minimal amounts of traditional waste materials to which other drilling methods would only struggle to have. Thus, it proves to be a method of choice if your project is sited in what can be described as a sensitive geological location.  

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