[SEL] Samson Iron Works - Stunning Original Photographs

[FRM8198 at aol.com]

In a message dated 11/29/2006 2:44:04 P.M. Pacific Standard Time,  
fero_ah at city-net.com writes:

Well  duh...  How did you expect the well to produce a lot of water  when
it's got an open bottom?  Damn water just runs right out  again.


Arnie,
An open bottom well is one where the well casing is landed on a  clay strata 
and then a hole (about half of the diameter of the casing) is  bored through 
the clay.  Usually, there is water bearing sand located under  the clay strata. 
 Water (from the water bearing sand) enters the well  through the hole in 
clay.  Pumping the well causes a cavity under the clay  strata to develop and is 
used to collect water under ground for the well.   This type of well is 
drilled as the casing is forced into the ground and is used  primarily for shallow 
wells.
The other type of water well is a gravel packed well casing.   A forced water 
rotary drill is used to bore the well.  The diameter of well  is about 4"- 6" 
larger than the diameter of the casing.  The depth of the  drilled well has 
to be about a 1/3 longer than the length of the casing.   This is necessary 
because the sediment in the drilling  water has to settle.   A section (at the 
bottom) of the  casing is perforated and the end of the casing is sealed.  After 
the well  is drilled, the casing is installed with the perforated section 
placed in a  water bearing sand strata.  The casing is held in place with gravel 
placed  between the casing and the drilled hole.  Water enters the well casing 
 through the perforations in the casing.  Initial pumping of the well causes  
a cavity to be developed around the perforations.  This  cavity stores water 
for the well.   

Francis