Rotary Drilling Tools in Pile Foundation

Rotary drilling tool is one of the most important parts in rotary drilling, which directly affects the construction quality, construction efficiency and construction cost. Among them, guiding and driving are the two main functions of rotary drilling bit.

The central guide teeth lead drilling, forming a "concave" shape in the center of the hole bottom, forming anti-deviation resistance, and optimize the gear to reduce resistance and hole wall constraint drill body, comprehensive measures to achieve the guide anti-deviation function; Through different drill body structure, different gear distribution methods are adopted, the drill teeth condense the torque and axial pressure output by the drill, and the geological cutting, crushing, towing or grinding can be performed. It can be full-section cutting/crushing slagging drilling or non-full-section ring cutting and crushing coring drilling.

The role of drilling tools

Positioning guidance:

Even if the drilling efficiency of the drill bit is high, the hole drilled is biased, which not only affects the quality of the hole, but also causes damage to the equipment components. Therefore, ensuring the perpendicularity of hole formation is the primary index, otherwise all efforts are futile.

Drilling:

The main role of the drill bit is drilling into holes, through different structures of the drill body, different forms of tooth distribution, can be divided into full section and non-full section of two categories. The full section includes single bottom bucket, double bottom sand dredging, double bottom cutter, body drill, straight/cone auger, full section hob and DTH hammer, while the non-full section includes cutter barrel drill, slice tooth barrel drill, cone barrel drill, etc.