Making a hole (Hole) into a well (Water Well) ready to develop water to use. Called to make a well (Well Completion), which consists of the design of the well (Well Design) to insert the filter pipe. And gravel (Gravel Packing)
1. Design of the pond
1. Boring the well with a 15-inch drill bit to insert the 8-inch pipe and filter pipe.
2. Dig the pit down to 350 feet and allow 900 feet of gravel and sand to fill up. If it is not full, find soil or sand
The exterior is added until it reaches a level of 350 feet.
3. Fill the cement in this 15 inch cored well from 295 ft. to 350 ft. to prevent saltwater from entering the ground floor into the fresh water.
(The distance from 295-307 feet, which is the freshwater layer, is filled with cement. To make the filling more effective)
4. Insert the 8-inch pipe from the soil surface down to a depth of 270 feet from 270-290 feet. Put the filter pipe of the same size using the pipe.
Filter the gap size 50/1000 inches from the level of 290-295 feet, which is the level of cement at the bottom of the well. Insert another piece of pipe of the same size.
Together, the end of the pipe at the bottom is closed.
5. Put 1/8 - 1/4 inch grit around the filter pipe and the casing from 265-295 feet.
6. The gap between the pipe and the wall of the well From the surface of the soil to 265 feet, again covered with cement to waterproof the upper salinity into fresh water.
7. The total cement used was calculated at 18 tons. The result of making this well appeared when the development of the well was completed. Get fresh water on demand
2. Inserting the filter pipe
The casing is made of ductile iron to be put in the pond as a permanent wall of the pond. And is also a housing for the suction nozzle of the groundwater pump All wells to be drilled in loose rock must be lined with casing to prevent the well from collapsing. Wells drilled in hard rock which, when exposed to water for a long time will crumble For example, shale must also be lined with pipes. Wells drilled in hard rock which can be stabilized with or without water. It is not necessary to put A well that does not have a casing is called an open pit.