This may not be the rig that is being used but it gives you some idea of the Sonic Drill.
.
|
Sonic Drilling employs the use of high-frequency, resonant energy to advance a core barrel or casing into subsurface formations. During drilling, the resonant energy is transferred down the drill string to the bit face at various sonic frequencies simultaneously rotating the drill string evenly distributes the energy and impact at the bit face.
When the resonant sonic energy coincides with the natural frequency of the drill string, resonance occurs. This results in the maximum amount of energy being delivered to the face. At the same time, friction of the soil immediately adjacent to the entire drill string is substantially minimized, resulting in very fast penetration.
Boart Longyear ™ has been a forerunner of Sonic drilling since its early market acceptance 15 years ago. With our already advanced diamond core fleet able to face any challenging bedrock conditions, sonic was the perfect complement for overburden drilling. The ability to produce a continuous, in-situ sample at or near 100 percent recovery in almost any overburden formation without issues of refusal makes it the premium choice for shallow drilling.
With a fleet of over 120 sonic rigs in operation world-wide, a dedicated R&D department, global manufacturing facilities and our Sonic University training program, it is fair to say that no one understands sonic drilling like we do.
.
|
|