Emergency Handling Guide for Flooded Directional Drills
Emergency Handling Guide for Flooded Directional Drills
Emergency Handling Guide for Flooded Directional Drills
If a directional drill is flooded, it must be handled promptly; otherwise, the operation and service life of the drill will be affected. The inspection and treatment mainly involve the following parts:
I Engine water ingress
1. Drain all the oil-water mixture from the oil pan. Rinse with clean water until no dirt flows out, then use kerosene or light diesel to rinse the oil pan. Add a sufficient amount of cleaning oil (diesel) until it fills up to the oil filler port (or until the cleaning oil overflows, as some machines have their exhaust pipes in the middle of the engine). Insert compressed air as far as possible into the lower part of the cleaning oil for boiling-type flushing, which can mix the silt deposited on components with the cleaning oil. Stop and drain the oil when the valve rocker assembly is visually clean (checked through the oil filler port).
3.After checking the hydraulic oil tank, manually crank the engine a dozen times, extract the residual lubricating oil from the piston tops, reinstall the fuel injectors, and clean the fuel circuit.
1. Extract the unspoiled hydraulic oil from the top of the hydraulic oil tank, drain the oil-water mixture from the bottom (including the hydraulic pump suction pipeline), clean the hydraulic oil tank and filter screen, and add new hydraulic oil (other parts of the hydraulic system do not need cleaning).
2. Use the starter to drive the hydraulic pump to idle until the hydraulic oil discharged by the pump contains no bubbles.
III. Reducer
Clean the rotary reducer with cleaning oil, and add lubricating oil after it passes inspection.
IV.Gear racks, cylinder chains
The grease in the gear racks, cylinder chains, and their internal components should be drained and cleaned once the machine is operational.
V. Engine intake system
It is advisable to disassemble the intake manifold and rinse it with water until clean, then replace the air filter.
VI. Electrical system
Disassemble, clean, and dry the electrical system to prevent rust. Before starting, install only the necessary fuses; after starting, gradually install the remaining ones to avoid undetected short-circuit faults.
VII. Final startup of the drill
Start the machine and run it at low idle speed for a few minutes. Check if the engine oil and hydraulic oil have deteriorated (engine oil is likely to deteriorate due to residual water in the lubricating oil passages; if so, replace it immediately). If no abnormalities are found, conduct a test run.
Major disassembly of the machine is not recommended after it has been flooded.