pyöriväiskuporaus

Pyöriväisku poraus, also known as rotary percussion drilling or rotational percussive drilling, is a drilling technique that combines both rotary and percussive actions. This method is particularly effective for drilling into hard and fractured rock formations. The drill bit is simultaneously rotated and struck with percussive blows, which helps to break up the rock more efficiently than pure rotary drilling. The rotational movement allows the bit to chip away at the material, while the percussive force fractures the rock, making it easier to remove.

The equipment used in pyöriväisku poraus typically includes a drilling rig, a drill string, and a specialized drill bit. The drill rig powers the rotation and the percussive mechanism. The percussive action can be generated by various means, such as pneumatic or hydraulic hammers, which are often integrated into the drill string or attached directly to the bit. Cuttings are generally removed from the borehole using compressed air or water, which are circulated down the drill string and forced back up the annulus.

This drilling method is widely employed in various applications, including mining, quarrying, civil engineering, and water well drilling. Its advantage lies in its ability to penetrate hard rock layers quickly and with less energy consumption compared to solely rotary drilling. The combined action reduces bit wear and increases drilling speed, making it a cost-effective solution for challenging geological conditions. However, the complexity of the equipment and the potential for excessive vibration can be considerations during its operation.