Views: 0 Author: WU Publish Time: 2025-02-17 Origin: Site
Rotary drilling rigs are specialized equipment widely used in foundation construction, geological exploration, and groundwater well drilling. Although they play an irreplaceable role in civil engineering, their operation is challenging, particularly for operators who require a high level of expertise. Below are several difficulty points in operating a rotary drilling rig:
The primary task of a rotary drilling rig is to break the soil and create deep, stable holes through the rotation of the drill bit. During the drilling process, the operator must control the drilling speed, rotation rate, and pressure to prevent the drill bit from getting stuck or the borehole from collapsing. Especially when drilling through different soil layers, operators need strong experience and quick reactions. For instance, in soft soil, clay, sand, and rock, the pressure and rotation speed of the drill bit must be adjusted in real-time based on the soil conditions. If not properly controlled, the drill bit may become clogged, jammed, or even cause equipment damage.
Stability is crucial during rotary drilling operations. The drilling rig experiences axial and lateral forces during operation, which may cause the machine to tilt and affect the verticality of the borehole. Therefore, operators need to constantly adjust the position and angle of the rig to ensure it remains level and vertical. Additionally, the stability of the rig is influenced by ground conditions. If the ground is uneven or the soil is loose, the rig may tilt, resulting in potential tipping or severe misalignment.
The hydraulic system of the rotary drilling rig provides power and controls various components, including the rotation of the drill bit, elevation, and movement. The working pressure, flow rate, and temperature of the hydraulic system directly affect the efficiency and safety of the rig. Operators need to continuously monitor the hydraulic system's status to ensure the oil temperature and pressure are within the normal range. If the hydraulic system fails, the equipment may not work properly, which could result in significant losses.
When drilling deep holes, borehole stability becomes a critical control point. During drilling, if the soil has insufficient friction or the water table is high, the borehole may easily collapse. To prevent this, operators typically use slurry or other supporting materials to stabilize the walls of the borehole. However, the flow and concentration of the slurry must be precisely controlled. Too much or too little slurry can affect the stability of the borehole. Therefore, operators need to constantly check the borehole's condition and adjust the slurry injection volume and concentration as needed to prevent collapse.
During operation, rotary drilling rigs need to precisely control the depth and position of the borehole. In some high-precision projects, deviations in drilling can lead to structural issues. Operators need to use high-precision measuring instruments to ensure the exact depth and location of the borehole. Furthermore, while drilling, operators must monitor variables such as temperature, humidity, and pressure inside the hole to make real-time adjustments and avoid deviations.
There are several safety risks associated with operating rotary drilling rigs. First, operators must avoid collisions with mechanical parts to prevent injuries. Additionally, as rotary drilling often occurs in complex terrains or weather conditions, operators must stay alert to environmental changes to avoid safety accidents. Rotary drilling rigs also generate significant noise and vibration, which can negatively impact the operator's health if exposed for extended periods. Proper protective measures must be taken to mitigate these risks.
