The Reaming Drill Bit is a specialized tool designed for directional drilling in coal mine geological exploration, gas drainage, and water discharge. Its long service life, high efficiency, and excellent borehole quality enhance the efficiency of coal mine gas management and water prevention, while providing technical assurance for safe coal mining operations.

Building on the features of our existing coal mining PDC drill bits, our company has innovatively developed a system that controls the activation and retraction of downhole reaming wings through flow rate adjustments. This allows reaming operations without tripping out, reducing the number of trips and improving drilling efficiency.

Key Features

Utilizes a direct-extension structure for reaming wings to perform reaming operations.

Symmetrical design with concentrically distributed PDC wings, ensuring balanced forces and smooth operation.

Replaceable reaming wings, offering structural stability during reaming, with high safety and reliability.

Concentric reaming results in more regular and smoother borehole diameters and walls.

Size Range

Φ95mm expanded to 120mm

Φ120mm expanded to 145mm

Φ145mm expanded to 203mm

Applicable Formations

Non-excavation formation rocks are typically soft to medium-hard, with drillability generally ranging from Grade IV to VI, and rock abrasiveness ranging from soft to moderate.