What are the steps of drilling a well? What does it look like? Many people want to know, belowFriction welding drill pipeDescribe the sequence of these steps:
1. The drilling unit must first drill holes and take samples to draw the drilling profile structure diagram.
2. According to the column chart: geological structure, make the upper pipe and filter pipe of the well, and the drilling diameter shall not be less than 300mm.
3. After the well is perforated and the pipe is put down, the backfilling amount of the filler is 1.8-2.0 cubic meters, and it must be ensured that the outside of the well pipe wall is more than 70mm. Filter material is siliceous sand pebble, no impurities. According to the pebble particle size grade 1 ingredients (20-40mm) is preferred. Fill the material layer by layer manually, mechanical backfilling of filter material is strictly prohibited, and soil is strictly prohibited from entering the well. Gravel filling method: generally use circulating water or static water to fill gravel. If it is found that the quantity and height of filter material filling are larger than those in the plan, find out the reason and properly handle it, and record the filling result.
4. After the well is completed, the well pipe shall be vertical and not inclined.
5.Friction welding drill pipeThe wall thickness of the polyethylene plastic pipe of the well pipe is 8mm, the well pipe adopts a drilling filter, the drilling is 18-20mm, the drilling rate is not less than 25%, and the well pipe is overlapped and the filter screen is fixed. Screw joints are used for well pipe overlapping, φ8mm holes are drilled, and φ10mm screws are installed. The mesh of the strainer is about 25 mesh, and the strainer is wrapped in 2 layers.
6. The upper part of the pebble filter material is more than 5 meters higher than the filter, and the rest of the filter is backfilled with clay.
7. After the well is completed, the well should be washed first and then pumped. The pumping test time is 24 hours of continuous pumping. The water output and water quality meet the design requirements.
8. In the process of sinking, the construction unit shall do a good job of describing each link of the whole drilling process, I .e. detailed construction records, geological histogram, particle analysis results of aquifer sand samples and filter materials, well pipe and filter pipe arrangement structure, well pipe connection mode and other data (including video or photo data), as well as the results of pumping test records.
9.Friction welding drill pipeIf the above technical requirements need to be modified due to special circumstances, the design requirements shall be prompted according to the Technical Specifications for Mechanic Well (SL256-2000) and submitted to the water conservancy department for approval. The construction unit shall go to the Ministry of Water Resources and Construction to handle the relevant procedures for well sinking construction before the construction of the well.
10. The length of the well pipe must be full feet, 30 meters deep in the well, the depth of the well pipe must reach 30 meters, 40 meters deep in the well, and the depth of the well pipe must reach 40 meters. If the number of feet is insufficient, no construction fee will be paid.