Rig pengeboran Bangxin
Gravel Layer Drilling: Bit Selection for Water Well Drilling Rig
In water well drilling rig operations, gravel layers (including cobbles) bring tough geological challenges. They have hard, dense, uneven particles that damage bits and risk tool jamming or burying.
Sharp gravel edges wear bits quickly; gaps between particles often cause drilling failures, slowing work and damaging equipment.
Here’s how water well drilling rigs tackle gravel layers:
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Use percussion bits (down-the-hole hammers) for hard gravel. They crush stones with high-frequency impacts. Compressed air clears cuttings, avoiding jams in large cobble layers.
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Choose robust roller cone bits for medium gravel content. Their strong alloy teeth and thick matrix handle repeated impacts. Rolling teeth evenly break rocks of varying hardness.
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Opt for special PDC bits in low-gravel but high-hardness layers. Reinforced blades and ultra-hard composites reduce impact damage, boosting cutting efficiency.
Control two key factors: Use high-viscosity, sand-carrying mud to clear cuttings. Keep drilling pressure moderate (8-12 tons) to prevent bit overload. With the right tools, water well drilling rig conquer gravel layers safely and efficiently.