Sonic Technology // Sonic Drilling Methods

Sonic Drilling Methods

Angle Drilling 

The TSi 150T and 150C can drill from vertical to 45°, while the TSi 150CC can drill from vertical to near-horizontal. Angle drilling is often necessary in projects when vertical drilling is impractical or impossible. Sonic drilling provides cleaner angle drilling with fully encased boreholes. 

In environmental applications, contaminated plumes can migrate under buildings. When assessments require soil and groundwater samples from beneath these structures, angle drilling is often required. Once the appropriate drilling angle and distance are determined, a sample can be taken from a very specific area. 

Geo-construction projects often require that tie-back and earth-retention anchors be installed at an angle in the sides of buildings or foundations, or in unstable rock structures or slopes. 

Mining applications such as drilling in tailings, waste piles or heap leach pads require angle drilling for better access and maximum recoveries. 

Thermal Remediation 

TSi Sonic Drill Rigs are ideal for installing the electrodes and recovery wells that Electrical Resistance Heating (ERH) in-situ thermal remediation requires. Rods, copper sheets, or other materials highly conductive to electrical currents are installed in 6” to 12” boreholes. Once electricity flows between the electrodes, the soil naturally resists the electrical flow causing the groundwater and soil to heat, creating steam and contaminant vapor. Steam, vapors and NAPLs are vacuum-extracted to the surface where they are treated. 

Chemical Injection Remediation 

TSi Sonic Drill Rigs provide the speed and accuracy necessary for successful chemical injection remediation projects. Chemical injection remediation is a process through which an amendment is injected into the ground. Common amendments include hydrogen peroxide, hydrogen release compounds, ORC, EVO, and persulfate. In bioremediation, microbes are injected into the ground followed by the introduction of oxygen and other nutrients to enhance their growth. These microbes then consume the contaminants that surround them. Industry-specific proprietary amendments, and amendments created specifically for existing soil and groundwater conditions are also used.

Vertical Aquifer Profiling 

TSi Sonic Drill Rigs can maximize the effectiveness and efficiency of vertical aquifer profiling by eliminating the need for unnecessary, repeated drilling and the installation of permanent monitoring wells. The vertical aquifer profiling process uses a push-ahead steel point threaded to the base of the drill string and advanced two feet below the bottom of the casing into the undisturbed formation at a predetermined interval. The point is then pulled back, exposing a small screen through which a discreet water sample is extracted. The process is repeated, allowing the collection of multiple water samples throughout the soil boring, resulting in a complete representative profile. 

Flushing Casing 

In applications where the lithology and/or areal extent of contamination is already known, TSi Sonic Drill Rigs can deliver sonic speed and efficiency without the additional time needed to gather samples. Flushing casing utilizes sonic casing only, without the core barrel, along with an increase in water flow to force material into the formation. Total depth can be reached up to 10 times faster, resulting in an open, cased borehole. 

Sonic Percussive Method 

TSi Sonic Drill Rigs can combine the speed and power of sonic drilling with the advantages of traditional down-the-hole (DTH) hammers, ideal for use when core samples are not required. DTH methods typically use a drilling device threaded to the end of a drill rod that features carbide buttons on the bit face. Actuated by compressed air, the hammer strikes the rock at 30 to 40 times per second, pulverizing it. The resulting dust is exhausted from the borehole by the compressed air. TSi Sonic Drill Rigs provide the choice of drilling with a DTH hammer, or the faster Sonic Percussive Method (SPM). This method oscillates a closed-faced bit up to 150 times per second, offering a highly effective alternative to a DTH. 

introduction to Mike Scaringella
Sales Manager, 27 Years Experience
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