What is the working principle and process of horizontal directional drilling?

1 Construction principle of horizontal directional drilling and pilot drilling Guided drilling is mainly completed by jet-assisted cutting bits. If the drill string is fed and rotated at the same time, the ramp loses its directionality and enables a straightened hole; if the drill string is only rotated, the reaction force acting on the ramp causes the bit to change direction. There is a probe or transmitter in the pilot bit.

2 Advantages and disadvantages of horizontal directional drilling Advantages: less interference to the surface, fast construction speed, controllable direction of pipeline laying, high construction precision. Disadvantages: The construction site requires a lot, it is difficult to construct in non-cohesive soil and gravel layer, and it is generally suitable for various soil layers without large pebbles.

3 Horizontal directional drilling construction process Construction preparation→measurement and setting out→equipment installation→drilling rig anchoring→mud preparation→pilot hole construction→hole reaming construction→pipe pullback.

The horizontal directional drill is flooded, how to deal with it?

1. Engine water intake 1. Drain all the oil-water mixture from the oil pan, add clean water to rinse until no dirt flows out, then use kerosene or light diesel to flush the oil pan, add more cleaning oil [diesel] until the machine is full and add oil [or until the cleaning oil flows out, because the exhaust pipe of some machines is in the middle of the engine], use compressed air to insert as much as possible into the lower part of the cleaning oil, and perform boiling flushing, which can mix the sediment deposited on the parts with the cleaning oil. 2. Remove the fuel injector, inject kerosene or light diesel oil into the cylinder, and let it flush the piston ring gap after part of it seeps in. sand], also use compressed air to wash and then pump out the cleaning oil, add lubricating oil with low viscosity, and add lubricating oil to the cleaned oil pan at the same time; 3. After the inspection of the hydraulic oil tank is completed, turn the engine manually After a few laps, pump out the residual lubricating oil on the top of the piston, reinstall the fuel injector, and clean the fuel circuit;