anderson water wells pump instal end services fort st john

By: Anderson Water Services  09-12-2011
Keywords: Wells, Water Wells, Water Services

anderson water wells pump instal end services fort st john

PUMP DEPARTMENT

Anderson Water Services

Pumping Test and Well Yield
Under the heading "Bailing or Pumping Test" on older logs or "Well Test" on newer logs are the
parameters necessary to help establish the initial efficiency of your well. These parameters
include: the Test Rate, Pre-Pumping Static Level, Feet of Drawdown and Duration of Test. The
Test Rate is the rate in gallons per minute that water was either pumped or bailed from the well.
A bailer is a long tube the driller uses to remove water and/or sediment from the well. The
Pre-Pumping Static Level is the level to which water has stabilized in the well with no outside
force acting upon it (the well is not pumping water). Subtracting the static water level from the
total depth of the well results in the feet of water in the well. A five inch diameter well will store
approximately one gallon per foot of water while a six inch diameter well will store approximately
1.5 gallons per foot of water. Feet of drawdown refers to the difference in feet between the
pre-pumping static water level and the final pumping level measured by the driller at the end of
the well test. For example, if a well has a 50 foot static water level and a final pumping level of
75 feet, the Feet of Drawdown would be 25. If the water level remains constant during pumping,
the water is being replenished at the same rate it is being pumped. This would be a very
efficient well. In general, wells with lesser drawdowns will be more efficient wells. Wells with
higher or total drawdowns are often very inefficient, low yielding wells. The "Duration of Test" is
A cone of depression is formed whenever a well is pumped. This cone of depression is best
described as a three dimensional cone surrounding the well that represents the volume of water
removed as a result of pumping. This cone is deepest and steepest near the wellbore and
flattens out as distance from the well increases. Generally speaking, the larger the withdrawal,
the larger the cone. Since no two cones of depression are ever identical, it is necessary to
perform a pumping test to determine the size and shape of the cone. The figure below illustrates
these concepts.
                             Submersible pumps
is a pump which has a hermetically sealed motor close-coupled to the pump body. The whole
assembly is submerged in the fluid to be pumped. The advantage of this type of pump is that it
can provide a significant lifting force as it does not rely on external air pressure to lift the fluid.
Working principle
ESP systems are effective for pumping produced fluids to surface.
A system of mechanical seals are used to prevent the fluid being pumped from entering the
motor and causing a short circuit. The pump can either be connected to a pipe, flexible hose or
lowered down guide rails or wires so that the pump sits on a "ducks foot" coupling, thereby
connecting it to the delivery pipework.
Design and build by ABE
Anderson water services

Keywords: Water Services, Water Wells, Wells

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09-12-2011

anderson water wells oil field drilling

The casing provides structural integrity to the newly drilled wellbore in addition to isolating potentially dangerous high pressure zones from each other and from the surface.With these zones safely isolated and the formation protected by the casing, the well can be drilled deeper with a smaller bit, and also cased with a smaller size casing.