Drill pipe is an important part of rotary drilling rig, and it is the most directly involved part for pile drilling, and plays an irreplaceable role in pile foundation engineering. The correct and reasonable use of rotary drilling pipe is an important factor to determine the service life of rotary drilling rig and maintain good performance. Therefore, the correct use and maintenance of drill pipe is a qualified rotary excavator must have the work skills:
The drill pipe and drill bit of a small rotary drilling rig can only be used for drilling pile holes, and are not allowed to be used for soil transfer, handling or leveling of the construction site. At the beginning of drilling, it is necessary to adjust the verticality of the drill pipe, which can reduce the huge resistance generated by the drill pipe in the process of expansion and contraction while ensuring the verticality of the pile hole. When drilling sand or pebble layer, the operator should pay special attention to not drilling too deep at one time, otherwise it will cause the hole wall to shrink, so that there is no gap between the drill wall and the hole wall, resulting in the drill can not reverse or lift, resulting in major accidents such as stuck drilling. At the same time, according to the geological environment, it is necessary to choose the appropriate drill bucket. Selecting the drill bucket suitable for geological requirements can not only improve the work efficiency, but also avoid the major accidents of buried drill and stuck drill. When using the mechanical locking drill pipe, please pay attention to observe the external drill pipe when the drill pipe is raised from the pile hole. If the outer drill pipe is raised too early from the power head, it means that a drill pipe has not fully unlocked when it is retracted.
