Combined water well drilling rigs, also known as multifunctional water well drilling rigs, are versatile drilling machines designed to perform various drilling operations. These rigs are typically equipped with multiple drilling methods and capabilities, allowing them to handle a wide range of drilling tasks efficiently.
Generally, a combined water well drilling rig can incorporate the following drilling methods:
1. Rotary Drilling: These rigs can use a rotary drill bit and drilling tools to penetrate the ground by rotating the drill string. Rotary drilling is effective for drilling through various types of formations, including soft soil, hard rock, and consolidated formations.
2. Percussion Drilling: Some combined drilling rigs also have percussion drilling capabilities. This method uses repeated percussion or impact force to break and crush rock formations, making it suitable for drilling in hard or compacted ground conditions.
3. Auger Drilling: Auger drilling involves using a spiral-shaped drilling tool called an auger to remove soil or other materials from the borehole. Auger drilling is often used for shallow and soft soil drilling, such as environmental sampling or geotechnical investigations.
4. Core Drilling: Core drilling is used to extract cylindrical samples of rock or soil for geological analysis. Combined drilling rigs equipped with this capability can obtain core samples, giving insights into the subsurface strata and mineralogy.
5. Casing Installation: In water well drilling, a casing is typically installed to prevent the borehole from collapsing while providing a pathway for the water to flow. Combined drilling rigs can have the ability to install casing during the drilling process.
The specific configuration and capabilities of a combined water well drilling rig may vary among models and manufacturers. These rigs offer flexibility, efficiency, and versatility, making them suitable for a wide range of drilling applications such as water wells, geothermal drilling, mineral exploration, and environmental studies.