Have dug a 600 feet depth borewell in Coimbatore(India) in my land.
Then when inserting the submersible pump we find a block at
300 feet.
What could this be? Can rocks move around at this depth and re-block borewell shafts as soon as the drill is taken out?
Any solutions to this problem?
2006-08-11 19:41:18 · 2 answers · asked by santha r 1 in Science & Mathematics ➔ Earth Sciences & Geology
As soon as the drill is taken out (along with the pipe used to convey the drill, material from above the total depth of the well can begin to fall in. It doesn't take much to form a blockage (usually called a "bridge"), and sometimes it doesn't take much re-drilling to get it out. If you know that the water will come from, say, 500 feet, you can insert a liner or casing into the well, and secure it at the surface to keep material from falling in.
2006-08-12 04:58:44 · answer #1 · answered by Anonymous · 0⤊ 0⤋
you didn't use any casings? if its a straight bore hole with no casing, i'm amazed it didn't collapse as soon as the drill head was removed. or it did and that's why its blocked. might try drilling the blockage out but it also might collapse the rest of the bore hole. good luck
2006-08-12 02:53:49 · answer #2 · answered by oldguy 6 · 0⤊ 0⤋