Views: 0 Author: Site Editor Publish Time: 2026-09-21 Origin: Site
Soft soil layer is the most common geological type in infrastructure construction, covering plain fill, silty clay, silty soil, etc. This type of geological soil is loose, has low bearing capacity, and is prone to hole collapse, which is the core factor affecting the drilling efficiency of rotary drilling rigs. The conventional uniform drilling mode is prone to problems such as drilling tool slippage, hole wall collapse, and soil hanging on the wall. Repeated cleaning and repairing of the hole wall will significantly slow down the construction progress. The process optimization for this type of geology needs to focus on low-speed stable advance, rapid drilling, and strict control of hole wall stability. During construction, the lifting speed of the main coil and the rotation speed of the drill rod can be appropriately reduced, the cutting angle of the bucket teeth can be increased, and a sand scoop can be used to quickly clear the slag in the hole, avoiding the accumulation of residual slag. At the same time, the single drilling depth is shortened, and the operation mode of "shallow drilling multiple times, fast drilling" is adopted to reduce soil disturbance, without frequent shutdown to deal with hole collapse problems, and to improve the overall drilling efficiency of soft soil layers from the foundation link.
The geological structure of sand and gravel is loose, the particles are hard, and the pores are large. During construction, it is easy to encounter situations such as drilling tool jamming, gravel blocking the drill bucket, and sand leakage on the hole wall. This not only slows down the drilling speed, but also exacerbates equipment wear such as drill teeth and drill rods, increasing construction costs. For this complex geological condition, it is necessary to adjust the drilling process and equipment adaptation plan accordingly. The replaceable wear-resistant reinforced sand scoop and alloy reinforced drill teeth enhance the ability to cut and grab pebbles, reducing equipment jamming and failure. During the operation, a pressurized and uniform drilling mode is adopted to avoid the loosening and loss of pebbles caused by high-speed drilling. At the same time, the mud wall protection technology is used to optimize the mud density and viscosity, effectively block pores, stabilize the hole wall, and prevent sand leakage and hole collapse problems. By optimizing the process and equipment in both directions, the downtime caused by equipment failures is significantly reduced, steadily improving the quality of drilling and construction efficiency in sand and gravel formations.
Weathered rock, hard rock and other hard rock layers have high geological hardness and strong integrity, which are the key and difficult points of rotary drilling rig drilling. The conventional drilling method has great resistance and is prone to problems such as drilling stagnation, drill tooth fracture, and drill rod vibration displacement. The construction efficiency is extremely low and the equipment is severely damaged. The core of process optimization in this geology is to reduce drilling resistance and accurately fracture rock layers. Before construction, the torque and pressure of the drilling rig can be adjusted according to the hardness of the rock layer. A fine drilling mode with low pressure and high speed can be adopted to avoid equipment damage caused by brute force drilling. For hard rock formations, priority should be given to using cylindrical core drilling tools to break the rock layers layer by layer and extract cores in sections to form holes, replacing the traditional integral drilling method and effectively reducing the resistance of single drilling operations. At the same time, timely cleaning of rock debris at the bottom of the hole is necessary to avoid the accumulation of rock debris, wear on drilling tools, and hinder drilling progress, achieving efficient and steady drilling in hard rock layers.
The stable improvement of drilling efficiency in different geological conditions cannot be achieved without the optimization and coordination of supporting auxiliary processes. Standardized supporting operation procedures can effectively avoid efficiency losses caused by human operation and environmental factors. Before construction, it is necessary to carry out geological survey work, accurately divide the geological types of the construction area, match the corresponding drilling tools, drilling parameters and operation modes in advance, and avoid temporary adjustments that may delay the progress during construction. Standardize the operation process during the homework, strictly control the mud ratio, drilling verticality, and single drilling parameters, and reduce the number of rework and hole repair times. At the same time, regular inspection and maintenance of equipment should be carried out, and faults in drill pipes, hydraulic systems, and power systems should be promptly investigated to avoid equipment downtime. Through comprehensive optimization of pre preparation, process control, and equipment assurance, the continuous, efficient, and stable drilling of rotary drilling rigs in multiple geological scenarios can be achieved.
The improvement of drilling efficiency of rotary drilling rig lies in the adaptation of process to local conditions and refined construction control. The soil structure, hardness, and stability vary greatly among different geological conditions, and there is no universal drilling technology. Only by optimizing parameters, matching operation modes, and improving supporting systems in a targeted manner can various geological construction pain points be fundamentally solved. Scientific process optimization can not only significantly improve the drilling speed and shorten the project duration, but also effectively reduce equipment wear, minimize quality problems such as hole collapse, deviation, and leakage, reduce construction rework and operation costs, balance construction quality, efficiency, and economy, and provide reliable technical support for efficient construction of various types of foundation pile projects.
