Johnson Type Water Well Screen Pipe/stainless Steel Casing Pipe

Johnson type water well screen pipe/stainless steel casing pipe

 

The continuous slot wire-wrap screen is used throughout the world for water, oil, and gas wells, and for environmental well completions. It is the dominant screen type used in the water well industry. this type of screen made up of rods and warp.the rod can be round wire,triangular wire and trapezoid wire.the wire is welded to the rods and produces a rigid unit that has high strength and minimum weight.the warp is triangular wire(v-shape wire).The water well screens have astructure and high open area;as well as accurate slot dimension. At the same time,water well screen have heat -resising,anti-corrosive,good machine capability,last long ,satefy and reliability and so on.

 

 

Advantages

 

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 through 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.

 

 

Features of Johnson Well Screen

 

2Avoid pump damage

3Improve well efficiency

4 Improve pumping efficiency

5 Maximize water flow rate into the well

6 Reduce well maintenance

 

 

Technical patameter

 

The V-shaped wire can be made in different height and width to address various strength application, meanwhile, the spacing of individual slots can be varied during fabrication if geologic conditions require these variations in a screen's construction.

 

Specification (wedge wire):	Width(mm): 1.50 1.80 2.30 3.00 3.30 3.70 Height(mm): 2.20 2.50 2.70 3.60 4.30 4.70 5.60 6.30 7.00
Specification (support rod):	Width(mm): 2.30 3.00 3.30 3.70 Height(mm): 2.70 3.60 4.70 5.60 6.30 Round: From 2.50mm to 6.0mm
Note: other specifications available as per request
Slot size:	0.10, 0.15, 0.20, 0.25, 0.30…… 6.00mm also achieved upon request.
Material:	galvanized low carton (LCG), stainless steel (304,316 etc.)
Length:	up to 6 meters
Diameter:	from 25mm to 1200mm.

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Package and delivery:

 

Application

 

The continuous-slot well screen is recommended in the following situations;

 

· Formation comprised of small or fine particles

· Water wells where gravel packs will be installed

· Thin aquifers, where maximum open area is required

· Small diameter wells

 

 

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