Views: 0 Author: Site Editor Publish Time: 2025-10-11 Origin: Site
In foundation engineering construction, the operational efficiency of rotary drilling rigs directly affects the overall project progress. Many construction teams fail to pay attention to detail control, resulting in the equipment's performance not meeting expectations. To ensure efficient operation of rotary drilling rigs, key tips need to be mastered from three stages: before construction, during construction, and after construction.
Adequate preparation before construction is a prerequisite for the efficient operation of rotary drilling rigs. First, it is essential to accurately grasp geological data by studying the investigation report to clarify the soil layer distribution, rock hardness, and groundwater level in the construction area. For example, when working in soft soil layers, extended drill rods should be prepared in advance to enhance stability; if there are underground obstacles, a cleaning plan must be formulated in advance to avoid work stoppages during drilling caused by these obstacles.
Secondly, equipment inspection must not be taken lightly. In addition to routine checks of core components such as the engine and hydraulic system, particular attention should be paid to the condition of the drill bits. If the teeth of the drill bucket have cracks or severe wear, they must be replaced immediately, otherwise the drilling speed will be reduced; the bolts at the connection points of the drill rods should be checked and tightened one by one to prevent drill rod loosening during construction. At the same time, drill bits should be reasonably matched according to the diameter and depth of the borehole. For example, for boreholes with a diameter exceeding 1.5 meters, high-strength three-section drill rods should be prioritized to ensure stability during the drilling process.
Operational techniques during drilling are the core to improving efficiency. When starting the hole, speed should be controlled, with low-speed drilling initially. Only after the drill bit is fully into the soil layer and the hole wall is preliminarily stabilized should the rotational speed and drilling speed be gradually increased to avoid hole collapse at the mouth. When lifting the drill bit, the speed should be uniform, generally maintained around 1m/s. Too fast a speed can cause a sudden drop in hole pressure, leading to collapse, while too slow a speed will prolong the operation cycle.
For different soil layers, operational methods need to be flexibly adjusted. In clay layers, the drill bit is prone to soil adhesion. Talcum powder can be applied to the inner wall of the drill bit to reduce adhesion, and the drill should be lifted for cleaning every about 3 meters to ensure the utilization rate of the drill bit volume. For sand layer construction, the mud specific gravity must be strictly controlled between 1.2-1.3, and the drilling speed should be slowed down to prevent sand particle loss and hole wall damage. In hard rock formations, a 'low speed, high torque' mode should be adopted to avoid excessive stress on the drill rod. The drill bit wear should be checked every 2 meters, and damaged roller cones should be replaced in a timely manner.
In addition, real-time monitoring of hole position quality is also important. Every 5 meters drilled, a deviation meter should be used to check the hole's verticality. If any deviation is found, the drill rig position and drilling angle should be adjusted promptly to avoid rework in subsequent processes caused by inaccurate hole positioning.
Post-Construction: Detailed Maintenance to Ensure Performance
Post-construction equipment maintenance is crucial for extending the service life of rotary drilling rigs and ensuring subsequent efficient operations. After completing work, it is necessary to promptly clean the mud and gravel from the drill rods and drill buckets, rinse them thoroughly with a high-pressure water gun to prevent residual impurities from corroding components; the hydraulic system should check the oil level and oil quality, and replace the hydraulic oil in time if it becomes turbid to avoid impurities blocking the oil circuit and affecting system performance.
Regular deep maintenance is also essential. According to the equipment manual requirements, regularly replace engine oil and filters, and apply lubricating grease to easily worn parts such as drill rod slides and bearings; establish an equipment maintenance ledger to record each maintenance time, content, and equipment operating status. Through data analysis, potential failures can be predicted in advance, for example, if there are signs of leakage in the hydraulic hoses, replace the seals in time to avoid minor failures causing major shutdowns.
The efficient construction of rotary drilling rigs cannot be separated from scientific control throughout the entire process. From detailed preparation before construction, precise operation during construction, to careful maintenance after construction, each link is closely linked to the core of 'efficiency', so that the equipment can continue to operate stably and speed up and improve the efficiency of foundation engineering.
