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XinHao Drilling Rigs: What are the key considerations for water well drilling?

A water well drilling rig, as the name suggests, is a mechanical device used to drill water wells and perform operations such as casing installation and well cleaning.

It mainly consists of a power unit, drill bit, drill rod, core cylinder, and drilling rig support. It is generally classified into three main categories: rotary drilling rigs, impact drilling rigs, and combined rotary drilling rigs.

The quality of its construction directly affects water production efficiency and project safety. To ensure smooth construction, the following aspects should be considered

I. Foundation Selection and Treatment

During water well drilling, continuous drilling and operation require a stable production platform to ensure stable production. The selection of the foundation is crucial, and the following aspects should be considered:

1. The foundation trench for the water well drilling rig should be excavated with stable slopes. Especially in easily collapsible strata, it must be excavated in a stepped shape to ensure stable production.

2. The wellbore of the water well drilling rig must be lowered smoothly to prevent tilting or other abnormalities. Any problems should be corrected and resolved promptly.

3. When using the drainage method for drilling, the water level in the caisson should decrease as the wellbore sinks, generally controlled to be approximately 0.5-1m below the excavation surface.

4. After well completion, a drainage operation is required to test the drilling quality. This involves a significant drawdown and pumping, maintaining a stable water level for approximately 8 hours. This is primarily to ensure the well's water level and flow rate.

II. Drill Bit Selection

Drill bits directly affect drilling efficiency and rock formation adaptability, requiring flexible selection based on formation characteristics.

Selection Recommendations:

1. When drilling in soft rock with good drillability, where drilling speed is faster, a drill bit with a large cuttings discharge capacity and high quality is needed, preferably a four-winged bit.

2. When drilling in hard rock, due to the rock's strength, each tooth and drill bit needs to withstand a significant load; therefore, a drill bit with high strength in both the bit body and teeth is required.

3. When drilling in clay-containing rocks, the loose clay often causes blockage of the cuttings discharge holes; a side-discharge drill bit can be selected.

4. When drilling in relatively tough rocks, a wedge-shaped tooth drill bit can be selected to ensure safe production.

Professional Tip

Choosing a professional drilling rig manufacturer like Xinhao ensures access to drill bits and technical support tailored to the geological formation, effectively mitigating construction risks.

Conclusion: Water well drilling requires strict control over foundation treatment and drill bit selection. Through scientific planning and reliable equipment support, such as collaborating with experienced drilling rig manufacturers like Xinhao, not only can well completion quality be improved, but equipment lifespan can also be significantly extended.

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