Water Well Filter Pipe,Water Well Screen Pipe

A Water Well Filter Pipe is a filtering device that serves as the intake portion of wells constructed in
unconsolidated or semi-consolidated aquifers. The screen permits water to enter the well
from the saturated aquifer, prevents sediment from entering the well, and serves
structurally to support the aquifer material. The importance of a proper Water Well Filter Pipe cannot
be overemphasized when considering the efficiency of a well and the log-term cost to its
owner.
Water Well Filter Pipe s are manufactured from a variety of materials and range from crude hand-
made contrivances to highly efficient and long-life models made on machines. The value
of a screen depends on how effectively it contributes to the success of a well. Important
screen criteria and functions include:
Criteria:
1. large percentage of open area
2. non clogging slots
3. resistant to corrosion
4. sufficient column and collapse strength
Functions:
1. easily developed
2. minimal incrusting tendency
3. low head loss through the screen
4. control sand pumping in all types of aquifers
Continuous-Slot Screen
The continuous-slot screen is widely used throughout the world for water, oil, and gas
wells, and is the dominant screen type used in the water well industry. It is made by
winding rolled wire, triangular in cross section, around a circular array of longitudinal rods.
The wire is attached to the rods by welding. Welded screens are commonly fabricated
from stainless steel.
Slot openings are manufactured by spacing successive turns of the outer wire to produce
the desired slot size. Slot openings have been designated by numbers which correspond
to the width of the openings in thousandths of an inch. A No. 10 slot screen, for example,
is an opening of 0.010 inch.
Continuous-slot screens provide more intake area per unit area of screen surface than any
other type. This type of screen has maximum open area. For best well efficiency, the
percentage of open area in a screen should be the same as, or great than, the average
porosity of the aquifer material. Water flows more freely through a screen with a large
intake area compare to one with limited open area. The entrance velocity is low, therefore
head loss for the screen is at a minimum, thus minimizing drawdown in the well.

304 Stainless Steel Casings
Agri-Screen
Deep Set Screens
Di-Electric Coupling
End Fitting and Screen Connection
Flush Threaded PVC Casing and Slotted Pipe Specifications
Free-Flow 304 Screen
Glass Filter Beads
Hi-Flow Screens
High Capacity Galvanized Screens
High Capacity Low Carbon Steel Screens
Stainless Steel Spline Connection
Male-X-Male
Muni-Pak