As core equipment in drilling, tunneling, and other engineering projects, the performance and stability of solids control equipment directly impact construction efficiency and costs. However, high-load operation, complex working conditions, and improper maintenance often lead to premature equipment failure. This article systematically outlines practical maintenance strategies for extending the lifespan of solids control equipment from three dimensions: mechanical maintenance, operating procedures, and environmental management, helping engineering teams maximize the value of equipment throughout its entire lifecycle.
In-depth Maintenance of Mechanical Systems
Precise Management of the Lubrication System
Lubrication is the ‘blood’ of equipment operation and requires a tiered lubrication system:
Key Components: High-speed rotating components such as vibrating screen bearings and centrifuge gearboxes require extreme pressure lithium-based grease, replenished every 500 hours, and the oil cleanliness (NAS 6 level or below) should be checked regularly.
Hydraulic System: Use anti-wear hydraulic oil (such as HM46), replace the filter element every 2000 hours, and simultaneously test the oil acid value (≤0.2mgKOH/g) and moisture content (≤0.1%) to prevent oil deterioration from accelerating component wear.
Chain Drive: The mud pump chain requires monthly application of molybdenum disulfide lubricant and adjustment of tension to ±5% of the design value to prevent chain skipping or breakage. This solution extended the chain lifespan from 8 months to 24 months on an offshore drilling platform.
Dynamic Balancing of Vibrating Components
Vibration motors in equipment such as vibrating screens and desanders require regular dynamic balancing tests: Use a laser dynamic balancing instrument every 1000 hours of operation, controlling the imbalance to within 0.5 g·mm/kg; Check the eccentric block fixing bolts of the vibration motor and tighten them a second time using a torque wrench to the standard value (e.g., M16 bolts should be tightened to 180 N·m) to prevent increased equipment vibration due to loosening. A desert drilling project showed that this measure can increase the bearing life of the vibration motor by 3 times.
Periodic Replacement of Wear Parts
Establish a lifecycle record for wear parts and dynamically adjust replacement cycles based on operating conditions:
Vibrating screen mesh: Replace every 500 hours in sandstone formations and every 300 hours in shale formations to prevent large particles from entering the mud system due to screen breakage.
Centrifuge screw conveyor: Check blade wear every 2000 hours; replace when the remaining thickness is ≤30% of the original design thickness.
Mud pump piston: Check sealing every 100 hours; replace immediately if leakage exceeds the standard to prevent mud from entering the hydraulic system. A shale gas development project extended its equipment overhaul cycle from 18 months to 36 months through this management approach.
Standardized Operating Procedures
Start-up-Run-Shutdown Guidelines
Strictly adhere to the ‘Three-Stage Operation Method’:
Before Start-up: Check the tightness of the equipment’s anchor bolts, lubricating oil level, and electrical wiring insulation. Run the equipment unloaded for 5 minutes to observe for any abnormal vibrations or noises.
During Operation: Monitor equipment temperature (e.g., hydraulic oil temperature ≤ 70℃), pressure (e.g., mud pump outlet pressure ≤ 1.2 times the design value), and vibration level (≤ 1.5 times the design value). If any limits are exceeded, immediately shut down and investigate.
After Shutdown: Clean the mud from the equipment surface, drain any residual pressure from the pipelines, and perform rust prevention treatment on critical components (e.g., the vibratory motor). A multinational engineering company reduced its equipment failure rate by 65% using this process.
Load Control and Operating Condition Matching
Avoid overloading equipment: Adjust solids control equipment parameters according to formation lithology, such as reducing the vibrating screen frequency (from 1200 rpm to 900 rpm) in soft mudstone formations to reduce screen impact; Control mud processing volume to 80%-90% of the equipment’s rated flow rate to prevent centrifuge drum deformation due to overload; Strictly prohibit solids control equipment from handling non-mud media (such as cement slurry) to avoid chemical corrosion accelerating component aging. A deep-sea drilling project reduced equipment overhaul costs by 40% by strictly adhering to this principle.
Cross-operation Protection Mechanism
Establish protective barriers when multiple devices are operating collaboratively: Install buffer tanks between the vibrating screen and mud pump to reduce the impact of mud pulses on the screen; Install flow regulating valves between the centrifuge and feed pump to prevent drum imbalance caused by feed fluctuations; Install splash guards around the equipment to prevent mud splashes from corroding electrical components. A tunnel boring project reduced the equipment electrical failure rate by 80% through this measure.
Environmental Adaptability Management
Corrosion Protection System Construction
Differentiated corrosion protection solutions are adopted for different operating conditions:
Marine Environment: The equipment casing is made of 316L stainless steel, key bolts are coated with Dacromet coating, and the electrical cabinet has a built-in dehumidification device (humidity ≤60%);
Acidic Formations: The inner wall of the mud tank is sprayed with epoxy glass flake coating, with a thickness ≥0.5mm, and the pH value is tested regularly (≥8 required);
Desert Environment: The equipment surface is coated with high-temperature resistant silicone resin coating, and the spacing between heat sinks is increased by 20% to enhance ventilation. After application in a Middle Eastern oilfield project, the equipment corrosion rate was reduced by 90%.
Dust Control and Cleaning Management
Establish a three-tiered cleaning system:
Daily Cleaning: Rinse equipment surfaces with a high-pressure water gun to remove mud, focusing on cleaning vibrating screens, centrifuge drums, and other key components;
Weekly Deep Cleaning: Disassemble removable parts (such as screen frames) and remove stubborn dirt using an ultrasonic cleaner;
Monthly Protective Treatment: Apply rust-preventive oil to cleaned metal parts and spray electrical components with conformal coating (moisture-proof, salt spray-proof, and mildew-proof). Using this system, a polar research station has achieved stable equipment operation even in environments as cold as -40°C.
Storage and Transportation Standards
When storing equipment for extended periods or during transportation, implement the ‘Five-Step Protection Method’:
Drain all liquids from the equipment (including lubricating oil, slurry, and coolant);
Pack precision components (such as sensors and hydraulic valves) with shockproof packaging;
When storing outdoors, cover with a rainproof tarpaulin and elevate the bottom by 20cm for moisture protection;
Before transportation, check the tightness of the equipment’s fixing bolts to prevent components from loosening due to transportation vibration;
Conduct comprehensive testing before restarting, including no-load test runs and hydraulic system pressure tests. A multinational engineering company reduced its equipment transportation damage rate to below 5% using this process.
Extending the lifespan of solid waste control equipment requires building a three-pronged management system: ‘preventive maintenance – standardized operation – environmental adaptation.’ Through in-depth maintenance of mechanical systems, precise control of operating procedures, and dynamic management of environmental factors, equipment failure rates can be significantly reduced and operating efficiency improved. With the development of IoT technology, in the future, intelligent sensors can monitor equipment status in real time, and combined with big data analysis, predictive maintenance needs can be developed, providing more scientific decision support for the full lifecycle management of solid waste control equipment.
