Knowledge of drilling rig
Release time:
2020-06-28
It is very complicated and difficult to use a bracket to drill a well into a casing after it is written in the book. The author saw the process of casing running in a nearby water well. First of all, the casing running is a steel pipe. The head of each steel pipe (casing) is welded with three round steel bars with a length of about 150mm diameter paper Φ 20. Use the casing clamp, clamp it well, and lift it as shown above, and lower the casing. Then weld the butt joint firmly.
Water well drilling rig has many places need to use, agricultural well residents with water wells, aquaculture, forestry, highway facilities and so on. Wherever water is needed. ZY series drilling rig is quite good to know.
At present, well drilling projects also use water well drilling rigs more often. In this project, the process speed of water well drilling rigs is also very important. Considering various factors of well drilling, it is not suitable for rainy season. As for the reason, Laizhou Zefeng will analyze it for everyone here.
After the completion of the well, it is necessary to pump water to check the results. Under normal circumstances, it is only necessary to pump water once. The stable duration of the water level shall not be less than 8 hours. At the same time, the outlet flow of the dynamic water level of the well shall be measured. For large wells with water inflow at the bottom of the well, the thickness of the inverted filter layer and the particle size of the filter material shall be constructed in accordance with the design requirements. The mud and sediment at the bottom of the well must be removed before the inverted filter layer is laid. The filter material shall be sieved to remove mud and measured for standby.
The well drilling project shall ensure the smooth drainage of the construction site, so the rainy season shall be avoided. When digging while working, the excavation slope shall be determined according to the physical and mechanical properties of the soil layer, generally 1:1.5, and there shall be a certain distance from the foot of the spoil slope to the upper opening of the excavation. For large wells with water inflow, the water inlet hole and inverted filter layer of the well wall must be arranged according to the design requirements, and the water inlet hole must be prevented from being blocked during construction.
The filling of the filter material at the aquifer shall meet the requirements, the backfill soil shall have a certain super-high, and the frozen soil in the backfill soil in winter shall not exceed 15%.
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