They are formed by different methods some of these are
1: Drilling a hole by machine or hand and installing casing and screen, in this method the ground conditions must support the hole opening or it will collapse.
2: By hammering your casing and screen directly into the ground using a amchine or a sledge hammer. If using PVC then a drive cap must be fitted to the top and this cap is used to take the hammer blows so as not to split the casing r screen.
3: Jetting, this can be done by using an Air compressor or a high pressure water supply.
A jet of water is pushed through an orrifice in the pointed spear and as the water is coming through the spear point the borecasing is pushed down as the water pushes the sand in front of the screen away, this goes on until the screen is at it's desired depth.
Spear point or Pointed bottom cap are made.
In the right ground conditions you can push your screen abnd casing straight into the ground thus saving a lot of expense by not having to predrill the hole in the ground.
These are made from solid PVC so there is no chance of them splitting into pieces as they are driven into the ground. these can also be made from other materials such as - HDPE, Steel Stainless Steel and any other material that you may need.
They are pushed into the pipe until the pipe hits the shoulder of the point and then they can be secured by gluing or fastening them with a rivot or stainless screw.
When using threaded screens and casing a short piece of the casing is attached to the spear point and will have a female thread so this can then screw staright onto your screen, this is a very quick method with not using any glues.
| P45-*************** |
SOLID SPEAR POINTS |
| P45-50CL18SPPVCPI |
PVC SPEAR POINT PUSH FOR PVC 50CL17 |
| P44-*************** |
SOLID SPEAR POINTS SCREW ON |
| P44-50CL18SPPVCSO |
50mm CL18 PVC SPEAR POINT Screw On FOR PVC 50CL18 |
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