AISI 304 Double Layer Well Strainer/Pre-Packed Gravel Well Screens for Deep Well

Product intro
Pipe based screens are used in water wells in many parts of the world and are common in oil field work because of their strength and durability in non-vertical borehole applications. the assembly for this screen is made by perforating a base pipe and then mounting a continuous slot screen over it via one of three methods:

1) winding trapezoid-shaped wire directly onto a pipe(wrap-on pipe);

2) winding wire over longitudinal rods mounted around a pipe's circumference(pipe base);

3) slipping a separate continuous slot well screen jacket over a pipe(screen jacket). winding wire over longitudinal rods is superior to the wrap-on pipe design because the rods hold the wire away from the pipe surface, blocking fewer of the base-pipe openings.

Advantage of perforated casing pipe:
Available in J55 or N80. 
J55 and N80 have high strength and less potentiality of deformation.
Punched hoses are smooth and clear without burrs.
Easy installation.
Overall preservative treatment creates a dense protective layer over the surface of the pipe and improves corrosive resistance.
Six types of punched hoses are available for specific application.
Two types of hoses distribution are manufactured.

advatage
MAXIMIZING FLOW RATES
When considering screens of equal length, diameter and slot size, flow rates through V-shaped well screens can be;
Three times higher than bridge-slot screens
Nine times higher than slotted casing
NON-CLOGGING SLOT
Continuous-slot well screens have V-shaped openings that narrowest at the outer face and widen inwardly, thus, oversized particles are retained outside the screen and particles passing thrugh the narrow outside opening can enter the screen.
REDUCTIONS IN OPERATING COSTS
By using a Continous-slot well screen, savings can be achieved in pumping costs. Lower through-slot velocities mean that pressure drops are minimized, therefore;
Drawdowns are reduced.
Less energy is needed for pumping.
Flow rates are increased.
Less sand in the water reduces wear on the pumps.

Packing
Single with bubble bag and then in wooden case(fumigation certificate). Each case is clearly marked with: 
1.Name & identification mark of manufacturerHuaDong Brand 
2. Batch number 
3. Date of manufacturer 
4. Material 
5. Collapse pressure&Tensile strength 

The reason why you choose us:
Professional technology, Completed testing equipment
We have 20 years experience in this field, we go in for technical innovations to improve the quality of products. in recent years, our products not only to be high-quality, safe and reliable, but also of beautiful appearance.
Small profits but quick turnover
Our Scale Production will offer you a lower price, which can help our customer to get more profite without to pay a heavy price.
Perfect After Sale Service10 years' warranty
With a comprehensive after- sale system , and 10 years of Warranty a comprehensive solution to our customers to worry about .Also it is a important reason why so many customer to choose us.