News Center

With surface and conventional resources gradually depleted, the large through hole drill pipe drilling industry must turn to complex areas, ocean and deep areas for resources. As a result, drilling requirements are getting higher and higher. Cable while drilling is widely used in the geology and mining industries because it can reflect the direction and dip of the well in real time.

There are generally two driving methods for drill pipes, one is top drive, and the other is turntable rotation. Top Drive: On the top of the crane, there is a movable pulley and a large hook. Large hooks hang from the top drive. There is an electric motor inside. The electric shock rotates to drive the square drill pipe and drill bit. This method still requires a turntable, mainly to capture the drill pipe in the extension tube. The other is that the square drill pipe is inserted into the rotary table, and the rotary table drives the square drill pipe and the drill bit to rotate.

Advantages of large through hole drill pipe:

1. No energy transfer loss. The impactor acts directly on the drill bit without the need to transfer impact energy from the drill pipe. Drilling speed is not affected by hole depth.

2. The drill pipe is straight, has good rigidity, does not bear impact force, only transmits torque, and the axial pressure transmission is very small. When decompressing drilling, there is no need to transmit axial pressure at all, so the drill pipe is not easy to bend and deform, and the wellbore is straight and smooth. , especially in the case of borehole fractures, inclined bedding or rock hardness variation, outperforms other drilling methods.

3. The slag is discharged cleanly. After the power medium works, it can also clean the hole, which is cleaner than other drilling methods and avoids over-drilling.

4. Low noise, because the impact is made at the bottom of the hole, which is less noise than the anvil type.

Based on these advantages, the large through-hole drill pipe is suitable for industrial and civil buildings, highways, railways, bridge foundations, dam sites, water conservancy, water wells, exploration and other engineering geological exploration projects, shallow oil and gas exploration, mine tunnel ventilation, drainage, Construction of large diameter pile holes, etc.