What is a well-drilling water finder?

As the name implies, water finder is an instrument for finding water, which is generally divided into natural electric field geophysical prospecting instruments and traditional artificial electrical prospecting instruments.

Their principles are basically the same, and they are all geophysical exploration methods based on the electromagnetic (conductivity) difference between the melt in the earth's crust and the surrounding rocks, by observing the natural electric field (artificial power supply electric field) to study geological structures, find useful mineral resources, and solve geological problems such as engineering, environment, disasters and water.

The natural electric field frequency selector is small in size, light in weight and easy to carry around. Two people can work without artificial electric field source; Large detection depth and high working efficiency; After adopting the frequency selection device, the anti-interference ability is strong; The data obtained at 10 working frequency is equivalent to the 10 symmetrical quadrupole apparent resistivity profile, but the electrode distance is different. Overcomes the shortcomings of DC method, such as long-distance stay and heavy equipment; It can work in a small area, especially suitable for rapid survey in mountainous areas and urban geophysical exploration.

In recent years, the instrument has been sold all over the country and has been widely praised by experts in hydrogeology, engineering geology and geophysical exploration, and has been well received by users.

Natural electric field frequency selection method, referred to as frequency selection method. Based on the electrical differences between underground rocks and minerals, the electromagnetic field changes of several different frequencies (frequency is 0. N-30 kHz) through frequency selection. The instruments used in this method are called natural electric field frequency-selective geophysical instruments.

Extended data

Operation method and matters needing attention in field drilling

1. Select the wellhead position, dig a round well with the same diameter and approximately the same depth as the drill bit as required, and put the drill bit in?

2. Align the center of the rotary table hole of the drilling rig with the center of the dug round well, and place the drilling rig. Hang a rope on the pulley above the derrick and tie an object. Adjust the legs to make the rope aim at the center of the turntable hole, and put a big wooden block under the legs to make the legs stable and reliable. ?

3. Dig a mud pit with a width of 2m, a length of 3m and a depth of 1m near the drilling machine 5m, so that the drilling machine can stir the mud when drilling the sand layer. ?

4. Place a submersible pump in a well or other water source near the well point, and connect the submersible pump with the pressure head with a water pipe. It is used to wash soil when drilling holes.

5. When docking the drill pipe, the throttle of the diesel engine should be small, and the drill pipe should not sway from side to side as far as possible to avoid premature damage of the drill pipe thread. ?

6. When the bit encounters a slow penetration rate in hard soil, the pressure bar can be used to increase the speed. If the drill pipe is skewed, you can adjust the hook on the pressure bar. ?

7. When drilling a well, be sure to hit the soil layer with clear water or mud according to the geological conditions. When you meet the sand layer, you must mix the sand with mud to avoid congestion. ?

8. After the completion of the drilling rig, the drill pipe should be recovered. When pulling the rod, pull the lifting wrench to make the drum rotate and drive the drill pipe to rise through friction. When the female club head is exposed. Close the valve below the rotary table, engage the reverse gear, and then retract the joystick. ?

9. Pay attention to avoid the swing of the female rod when pulling the rod, so as not to damage the thread, and the staff should tighten the wire rope at the same time. As soon as the line is separated, it will be separated immediately. Avoid the relative movement between external thread and internal thread and wear the thread. ?

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