The sonic drilling technology was first applied over 40 years ago in Canada.
The sonic head is based upon the principle of high frequency vibration. The hydraulic motors on the exterior of the head oscillate off set internal weights at speeds reaching 5000 rpm. As a result of the weights being off set, it creates a vibration in excess of 140 HZ.
One of the numerous advantages of a sonic rig is its ability to make the soil fluidize. While the soil is fluidized a controlled water flow will push the material out of the way. The Sonic advantage to this method is its ability to constantly case the borehole after it advances the sample tooling to the next sample interval. If a sample is not required it will further advance the core barrel and follow it with the casing keeping a constant open and clean hole. This minimizes the risk of lodged tooling below ground surface. If the situation should occur that the override casing begins to get tight, the sonic is capable of drilling a larger over ride casing to reduce the skin friction on the down the hole tooling without removal of the already installed drill steel. This allows the sonic to maximize its depth capability ranging from 250’ to 500+’, depending on the situation.
Layne Christensen has 2 styles of Sonic drill rigs to choose from. One of the rigs was designed and built by Layne for the purpose of operating in tight conditions and is a rubber track mounted rig. We also provide truck mounted drill rigs that are used to maximize production due to their 26’ stroke mast and they are also capable of larger diameter drilling to deeper depths than the small track mounted rig because of an increase in horse power.
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