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  1. #1
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    Well Drilling Idea

    Was at the Uncle-in-law's house for the "respect your elders" ceremony over Songkran and I noticed that he had a large pile of three inch steel pipe stacked up next to an 8 HP water pump. He's a forestry dude but turns out he moonlights by putting in wells. He doesn't use a well point or screen and the water just enters the bottom of the pipe. Here is a video that uses a similar concept, albeit with plastic pipe which has to be easier to handle.

    How to Drill Your Own Water Well


    I think he'll put one in for us but I want to drill the bottom meter of the pipe and put in a sand screen.
    Press On Regardless

  2. #2
    Have you got any cheese Thetyim's Avatar
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    What happens when you hit a stone ?

  3. #3
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    Quote Originally Posted by Thetyim View Post
    What happens when you hit a stone ?
    Somewhere on that website it said you can usually go around it, but if not, pull it all up and start again. I wondered about that too as in our area there is a rocky layer of 1-2 inch stones for about a meter.

  4. #4
    Have you got any cheese Thetyim's Avatar
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    I think he is only going through earth and clay.
    I can't see how he can get past any rocks.

    Also he is only going down 8 metres
    Is that deep enough for you ?

  5. #5
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    Quote Originally Posted by Thetyim View Post
    I think he is only going through earth and clay.
    I can't see how he can get past any rocks.

    Also he is only going down 8 metres
    Is that deep enough for you ?
    I think the system can go deeper if there are not rocks and you have enough water volume. We have springs on our property so don't have to go down far at all. Will go down 7 meters but the casing should fill to within two meters of the surface.

  6. #6
    Have you got any cheese Thetyim's Avatar
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    Quote Originally Posted by thailazer
    We have springs on our property
    So why do you need a bore drilled ?

    At the depth you are going down it will be the same quality water

  7. #7
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    Quote Originally Posted by Thetyim View Post
    Quote Originally Posted by thailazer
    We have springs on our property
    So why do you need a bore drilled ?

    At the depth you are going down it will be the same quality water
    The quality of the water is excellent and it runs about 19 degrees C. Neighbors came and get some frequently. The long casing is just for capacity so that there is always water to pump.

  8. #8
    Member RamboII's Avatar
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    I have a vacant house in Chiang Mai that uses water supplied by the city. It costs 1,000 baht a month extra to run the underground sprinkler system. I had a 1,500 liter tank but occasionally it ran dry, especially during hot season. Also, when the sprinkler runs, between 11:00 AM and 1:00 PM, there was very low water pressure inside the house. Also, since no one is living there, the water pump fried when it was running and there was no water to pump. My wife has been back in C.M.for the last 5 months (and I was there for 2 weeks in March). We got estimates for digging a well, installing another water tank (2,000 liters) and hooking it up to just the sprinkler system and the water hoses. We got estimates from 60,000 to 70,000 baht. We went with the 70,000 baht bid, because of the person's experience and he was willing to dig as deep as it took to strike enough water to make sure the well would not run dry. My wife was there while the work was done and the well has supplied enough water to top off the tank after the sprinkler runs each day. I figure that it will take around 6 years for the well to pay for itself. In the meantime, I have a neighbor that occasionally looks after the house and will notify me if anything, including the water system, needs to be looked at.
    the other Marmite

  9. #9
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    Quote Originally Posted by thailazer
    The long casing is just for capacity so that there is always water to pump.
    sounds like it will be the same as an old fashioned well

    just dig a big hole!

  10. #10
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    Quote Originally Posted by DrAndy View Post
    Quote Originally Posted by thailazer
    The long casing is just for capacity so that there is always water to pump.
    sounds like it will be the same as an old fashioned well

    just dig a big hole!
    Oh sure a big 'ole hole would work just fine. We want a casing so it is easier to seal up against contamination as the water is fit to drink when it comes out of the ground. If you use the big 'ole hole with the stacked rings, it's pretty easy for chicken crap and what not to get in.

  11. #11
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    more flavour

  12. #12
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    Quote Originally Posted by RamboII
    I have a vacant house in Chiang Mai that uses water supplied by the city
    city water has very varied pressure, often less than a 2 metre rise so a tank will not fill

    a well is the best way to go for irrigation, as there is no need for filtering etc

    usually, water in the city is around 2/3 m down, so easily found

    you can drill a well of about 10 metres to be sure of a good supply
    I have reported your post

  13. #13
    Member BKKBILL's Avatar
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    Quote Originally Posted by DrAndy View Post
    more flavour
    That may be true but does it taste like chicken.

  14. #14
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    High quality water can be found in a fast moving upper aquifer if location is suitable. Jet drilling works well in soft clay or sand and is best accomplished using a gasoline powered pump and temporary casing. When the desired depth is reached (water bearing sand) the well screen and pipe is inserted and the temporary casing removed. If the setup is organised an 8M 3 inch well can be drilled in about 1 hour.
    With shallow well drilling itís important to know the water table depth during wet and dry seasons.

    This guy shows how well jetting works.






    Photo of 4 inch shallow well jetted to 9M which is about maximum for a surface mounted suction pump. Anything deeper would require a submersible or jet pump with submersed jet.








  15. #15
    Have you got any cheese Thetyim's Avatar
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    ^
    Is that in Thailand ?
    I can't get 45 degree bends where I live

  16. #16
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    Quote Originally Posted by Thetyim
    I can't get 45 degree bends where I live
    Your hardware store should be able to order them for you and every Homepro has them.

  17. #17
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    Quote Originally Posted by Thetyim View Post
    ^
    Is that in Thailand ?
    I can't get 45 degree bends where I live
    Yes it's Thailand.

    Thais often avoid using 45 degree fittings as they can save the cost of a whisky by bending the pipe. This is probably why some out of town shops don't keep stock.

  18. #18
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    Quote Originally Posted by RamboII View Post
    Also, when the sprinkler runs, between 11:00 AM and 1:00 PM, there was very low water pressure inside the house.
    Are you trying to water your plants, or, boil them?
    Sprinklers should be set to work preferably during the hours of darkness.
    Less of the water will evaporate and more will get to the plants roots.

  19. #19
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    I got our well done 2 years ago, after we build a small hut on our land near Kon Kaen. We paid 30,000 Bath and the guys drilled 30 meter. We already had water at 15 meter, but the guys told the Wife they wanted to continue. We also drilled in the dry season. For 2 years now we have been using that well for watering plants and trees on our land. This year we build a house on the land. The well functioned great during building. We also build a pump house around it with a 2.000 liter tank. We filter the water prior to going to the tank. We have put a 2nd pump to pressurize the water for the whole house. As off today we are facing now issues. So I guess 30,000 bath for an independent water supply is not a bad investment.

  20. #20
    Thailand Expat Hampsha's Avatar
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    When we did our 30-meter well in Surin, it was only 2,000 baht. That was about 8 years ago. The man came with his own drilling creation. Usually these drilling trucks are are old, beaten-up, toyota or whatever pickups with an attachment on the back for the drilling. We went through clay or sand mostly on the way down. At the very end, we hit more pebbles. After watching it, I got the impression that if I were patient enough I probably could drill down a bit with some pvc and a hose attachment. The water did all the work where we are. Maybe the term drill isn't the right one as it's more like a waterpick.

  21. #21
    Guest Member S Landreth's Avatar
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    Quote Originally Posted by Maxion View Post
    well jetting works

    Iíve jetted wells (well pointing/dewatering) before but using a hoe and maybe a 3 inch high pressure hose attached to a steel pipe (no need to push this pipe,.itís own weight will drive it down). We placed a perforated/slotted pvc pipe in the ground dumped a lot of sand in the hole (after the pvc pipe was in) and it worked great. Nothing to it.

    If you placed a sock around the slotted pvc pipe before you placed it in the ground it might last a bit longer.

    Doesnít work in rocky soils for obvious reasons.
    Keep your friends close and your enemies closer.

  22. #22
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    Ended up giving the water-jetting a try and we got down the first 4 meters in 30 minutes with my wife and step son doing most of the drilling. I hose clamped a piece of teak to a 3 inch casing for better control and down we went. It was a lot of fun. Tested it the next day and we got 12 gallons a minute and ran for 30 minutes without sucking air. I built a well screen out by drilling holes in the bottom section and then wrapping fine stainless steel screen around it.

  23. #23
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    12 gallons a minute is a good flow, well done. Thanks for showing what can be done. green sent

  24. #24
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    Thanks Pale! Here are a few photos of the process. I think the secret to the high volume is the well screen stuck right into a water-bearing layer of sand. We had springs on the bottom part of our property so I knew it was down there somewhere. A buddy lent me his 6HP pump so we had high water volume to push up the tailings. You could feel and hear the rig going through the different layers of clay, stones, and then into the hiss-hiss of sand.


  25. #25
    Thailand Expat Hampsha's Avatar
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    Thailazer, did the water do all the work or did you have to turn that pvc to turn up the soil down in the well? How deep did you actually get as you mentioned 'the 'first 4 meters'? What's that top left pic with the wrapping on it and the cap?

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