Selection and maintenance of hydraulic oil for water well drilling rig

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Hydraulic oil is the “blood” of the rig’s hydraulic system, directly affecting performance and lifespan.water well drilling rig. Proper selection and maintenance ensure reliable operation.

 

  1. Selection criteria: Choose oil based on system pressure, ambient temperature and component types. Medium-low pressure systems (<16MPa) use L-HM anti-wear oil; high-pressure ones (>31.5MPa) need high-pressure types like L-HV for cold areas. Viscosity is key—too high causes overheating, too low increases wear. Northern winters require high-viscosity-index oil (e.g., 46# low-temperature anti-wear oil) to prevent solidification.
  2. Replacement cycles: First change after 200 hours of initial use, then every 500-800 hours. Shorten in harsh environments—desert rigs need changes every 300 hours to avoid pump wear from dust. Drain old oil fully and clean tanks/filters when replacing.
  3. Daily maintenance: Keep oil level between 1/2-2/3 of the tank scale. Check contamination weekly—replace if oil turns black or emulsifies. Clean filters monthly. Never mix different oils; this may cause seal swelling and leaks.

Good hydraulic oil management cuts system faults greatly and extends the rig’s service life.water well drilling rig