As the "deep hole pioneer" in foundation construction, the operational stability of rotary drilling rigs directly determines the project progress and cost. Many construction teams neglect maintenance details, leading to frequent equipment failures and shortened service life. Mastering core maintenance tips is essential to ensure the equipment operates efficiently and continuously.
Daily inspection is the "first line of defense" for maintenance, requiring precise coverage of key components. Before starting the machine, it is imperative to check the oil level and quality of hydraulic oil and engine oil. If emulsification or excessive impurities are found in the oil, it must be replaced immediately and leakage points should be inspected. The adjustment of crawler chassis tension is easily overlooked—too loose a tension may cause chain detachment, while too tight a tension will aggravate wear. Appropriate tension should be maintained according to construction road conditions. In addition, the wear condition of the drill pipe locking device, the number of broken wires in the steel wire rope, and the grease stock at each lubrication point should be recorded daily, with timely handling of any abnormalities.
Targeted maintenance of core systems is the key to extending service life. The hydraulic system, known as the "power heart", requires quarterly filter element cleaning in addition to regular oil changes to prevent impurities from clogging the oil circuit. As the core drilling component, the power head requires focused inspection of the reducer oil quality and gear wear. After construction in hard rock formations, attached rock debris must be cleaned promptly to prevent damage to seals. There is a knack for maintaining the steel wire rope of the hoisting system: after each construction, clean surface oil and dirt with diesel oil and apply special grease. Meanwhile, avoid keeping the steel wire rope in a tensioned state for a long time and relax it to a natural state when idle.
Working condition adaptation and standardized operation serve as the "invisible guarantee" for maintenance. Maintenance priorities vary after construction in different formations: after construction in clay layers, residual clay in the drill bucket must be thoroughly cleaned to prevent caking from affecting subsequent drilling; after construction in sand layers, check the seal at the drill pipe connection to prevent sand particles from entering and wearing the threads. In terms of operation, rough operations such as sudden acceleration, emergency stop and sharp turning are strictly prohibited. During drilling, torque and speed should be adjusted smoothly according to formation hardness to reduce mechanical impact.
Seasonal maintenance should not be neglected. In high-temperature summer, inspect the cooling system and clean dust on the radiator surface to ensure good heat dissipation of hydraulic oil and coolant. In low-temperature winter, replace with low-temperature antifreeze engine oil and hydraulic oil. After starting the machine, idle for 10 minutes before operation to avoid component wear caused by cold start.
The core of maintenance lies in "preventing problems before they occur" rather than emergency repairs after failures. Establishing detailed maintenance records, clarifying daily, weekly and monthly maintenance lists, and assigning responsibilities to specific personnel will ensure the rotary drilling rig always maintains optimal performance, significantly extends its service life, and provides solid support for reducing construction costs and improving efficiency.
