Shandong Zhengyuan Drilling and Production Intelligent Equipment Co., Ltd
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1.Power system maintenanceDaily check
① Oil level (maintain scale scale at 1/2-2/3)
② Air filter pressure difference (replace immediately if it exceeds 25kPa)
③ Coolant pH value (controlled between 8.5-10.5)
500 hours of maintenance
l Replace the fuel filter element (Cummins recommends using the FF5745 model)
l Clean the carbon deposits on the turbocharger (wire brush is prohibited, use carburetor cleaner)
Fault warning
l Continuous emission of black smoke: clogged fuel injectors or insufficient air intake
l Water temperature exceeds 95 ℃: Check if the thermostat or radiator fins are blocked
Hydraulic system
Key maintenance points
l Hydraulic oil cleanliness (NAS level 8 standard, quarterly testing)
l Pump body vibration value (axial vibration ≤ 4.5mm/s, using Fluke 810 vibrometer)
l Seal replacement cycle (Parker brand seal rings must be replaced every 2000 hours)
Operation taboos
l Prohibit mixing hydraulic oils of different brands (such as Shell and Mobil, which need to be thoroughly rinsed)
l Before starting in winter, the oil temperature needs to be preheated to ≥ 15 ℃ (through the fuel tank heating plate)
Drill rod and drill bit
| Maintenance Object | Operating specifications | Tools/Materials | International Standards |
| Drill pipe thread | Apply EP-2 thread grease after each disassembly | Copper wire brush cleaning | API RP 7A |
| Pdc bits | Cover the tooth tips with anti rust film during storage | VCI gas-phase rust proof paper | ISO 10407 |
| Drill collar stabilizer | Scrap if radial wear exceeds 3mm | Laser caliper | API SPEC 7-1 |
Sleeve maintenance
Storage requirements
l Stacking no more than 5 layers, separated by wooden mats between layers (spacing ≥ 30cm)
l The end sealing cover maintains airtightness (in environments with humidity<60%)
Pre well inspection
l Ultrasonic testing (prohibited for wall thickness deviation>10%)
l Ellipticity measurement (straightening is required if it exceeds 1% of the nominal diameter)
| Device Type | Maintenance focus | Testing tools | Parameters Standard |
| Vibrating screen | Screen tension maintained at 50-70N | Tensiometer | API RP 13C |
| Desander | Cyclone cone angle wear>2 ° replacement | Angle gauge | ISO 13501 |
| Centrifuge | Differential oil temperature ＜ 85 ℃ | Infrared thermometer | GB/T 10901 |
| Sensor calibration Sensor type | Calibration cycle | Standard Equipment | Allowable error |
| Pressure sensor | 6 months | Fluke 729 | ≤0.5%FS |
| tilt sensor | 12 months | Wyler Clinometer | ±0.1° |
| The torque sensor | 3 months | HBM T12 | ±1% |
5.Maintenance of well control system
Functional testing
· Weekly remote control console accumulator pressure detection (17.5-21MPa)
· Monthly full-size gate shear test (cutting time ≤ 45 seconds for a drill pipe with a diameter of 127mm)
Sealing management
· Circular rubber core storage temperature 10-25 ℃ (avoid direct sunlight)
· The amount of sealing grease added to the gate should be ≥ 4.5kg each time (using Shaffer special grease)
| Maintenance level | Time/Mileage | core content | Estimated working hours |
| Routine maintenance | Every 8 hours | Oil level/filter element/bolt inspection | 0.5-1 hour |
| elementary maintenance | 250 hours | Lubrication point oil injection+instrument calibration | 2-3 hours |
| Secondary maintenance | 1000 hours | Hydraulic oil replacement+gearbox disassembly and inspection | 8-12 hours |
| Overhaul and maintenance | 8000 hours | Engine maintenance+structural component inspection | 72 hours+ |