The continuous Vee-Wire ® slot design allows for lower entrance velocity of the water, reducing encrustation rates. The slot design also resists plugging and prevents sand from damaging pumps. Stainless Steel Water Well Screens and Accessories Johnson Screens is one of the largest manufacturers of stainless steel water well screens in the world. With a high open area, allowing for better access to the entire formation around the screen; fines and drilling fluid are removed quickly and completely, resulting in a better well development. Less Maintenance The high open area of the Vee-Wire well screen allows for water to enter the well freely, resulting in minimal drawdown and less energy usage by a pump. Pumping Costs • Screens designed to site-specific yield requirements and aquifer characteristics • Screen slot opening selected from formation sand sample analysis • Wire and rod construction to deliver required strength for the specified well depth • Stainless material selected to maximize corrosion resistance for water chemistry • Wide variety of fittings to facilitate secure and efficient installation Optimal Performance Through Sand Control The water well screen is a key component of the sand control system, either as an integral component of the gravel pack, or as a standalone provider of sand control. Patented Vee-Wire technology and welded construction, help to prevent well screen failure by better controlling the sand. Technical support and design assistance • Sand analysis of formation materials • Screen size recommendations • Screen installation suggestions • Well construction consultation Technical staff includes: design engineers, welders, technical support personnel and sales engineers who have been on the factory floor, presented in classrooms and technical seminars, set and pulled screens and run pumping test. A brand of Aqseptence Group
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Stainless Steel Water Well Screens and Accessories · Small Diameter Stainless Steel Well Screens Water Well and Environmental Screens 60 Wire Construction 304 and 316 Stainless Steel
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The continuous Vee-Wire® slot design allows for lower entrance velocity of the water, reducing encrustation rates. The slot design also resists plugging and prevents sand from damaging pumps.
Stainless Steel Water Well Screens and AccessoriesJohnson Screens is one of the largest manufacturers of stainless steel water well screens in the world. With a high open area, allowing for better access to the entire formation around the screen; fines and drilling fluid are removed quickly and completely, resulting in a better well development.
Less Maintenance
The high open area of the Vee-Wire well screen allows for water to enter the well freely, resulting in minimal drawdown and less energy usage by a pump.
Pumping Costs
• Screens designed to site-specific yield requirements and aquifer characteristics• Screen slot opening selected from formation sand sample analysis • Wire and rod construction to deliver required strength for the specified well depth• Stainless material selected to maximize corrosion resistance for water chemistry• Wide variety of fittings to facilitate secure and efficient installation
Optimal Performance Through
Sand Control The water well screen is a key component of the sand control system, either as an integral component of the gravel pack, or as a standalone provider of sand control. Patented Vee-Wire technology and welded construction, help to prevent well screen failure by better controlling the sand.
Technical support and design assistance• Sand analysis of formation
materials• Screen size recommendations• Screen installation suggestions• Well construction consultation
Technical staff includes: design engineers, welders, technical support personnel and sales engineers who have been on the factory floor, presented in classrooms and technical seminars, set and pulled screens and run pumping test.
A brand of Aqseptence Group
Water Well Drive Points
Size (in.) OD (in.) ID (in.) Screen Weight1 (lbs./ft.)
- Transmitting capacity (gpm/ft. of screen) = open area x 0.31 @ 0.1 ft./sec - P - pipe size
1. Weight is based on 10 slot construction, no fittings2. Tensile and column strengths include a 30 percent safety factor3. Column strength is based on 5 ft. screen barrel length4. Calculated collapse values - no safety factor included
Page 2
End Fitting and Screen Connection OptionsThe majority of well screen installations involve at least a few standard fitting combinations.
Telescope size screens typically use a Figure K packer on the screen top and a welded or threaded plate bottom. Pipe size screens attach directly to the casing and usually have plate bottoms.
Johnson Screens has several fittings and accessories, such as centralizers, shale traps and connecting fittings for quick delivery. Options include:• Flush threads (Sch. 40 and Sch. 80)• NPT threads• Weld rings• API couplers• Plate bottom• Threaded point• Threaded cap /plugs• Locking caps• Bail hooks• Weld ring x weld ring• Weld ring x collar• PVC to stainless steel adapter• Quickloc®
• Shur-A-Lock®
• ShurGrip®
Centralizer Figure TF Washdown
Figure K Packer
JSLFittings
R & L Threaded Couplings
R & L Threaded Nipples
Back Pressure Valves Wash Plugs
Di-Electric Coupling Flush Thread
Shale Trap
Drive Point
Page 3
Small Diameter Stainless Steel Well ScreensWater Well and Environmental Screens 60 Wire Construction 304 and 316 Stainless Steel
* Alternate constructions for water well and environmental** ID confirmed clear for environmental with Sch. 40 fittings only (Sch. 80 is smaller)
1. Weight is based on 10 slot construction, no fittings2. Tensile and column strengths include a 30 percent safety factor3. Recommended hang weight is 50 percent of calculated tensile strength4. Column strength is based on 5 ft. screen barrel length5. Calculated collapse values - no safety factor included
• Transmitting capacity (gpm/ft. of screen) = open area x 0.31 @ 0.1 ft./.sec• P - pipe size, T - telescope
Notes:
Page 4
Water Well and Environmental Screens 90 Wire Construction 304 and 316
* Alternate constructions for water well and environmental** ID confirmed clear for environmental with Sch. 40 fittings only (Sch. 80 is smaller)
1. Weight is based on 10 slot construction, no fittings2. Tensile and column strengths include a 30 percent safety factor3. Recommended hang weight is 50 percent of calculated tensile strength4. Column strength is based on 5 ft. screen barrel length5. Calculated collapse values - no safety factor included
• Transmitting capacity (gpm/ft. of screen) = open area x 0.31 @ 0.1 ft./.sec• P - pipe size, T - telescope
1. Based on 0.030 in. slot size (collapse values contain no safety factor)
2. Recommended hang weight is 50 percent of the calculated tensile strength
3. Transmitting capacity in gpm/ft. of screen = open area x 0.31 @ 0.1 ft./sec.
Telescope size screens install through the casing and usually have a Figure K packer as the upper fitting. Pipe size screens (right) usually have weld rings at each end and attach directly to the casing.
1. Based on 0.030 in. slot size (collapse values contain no safety factor)2. Recommended hang weight is 50 percent of the calculated tensile strength3. Transmitting capacity in gpm./ft. of screen = open area x 0.31 @ 0.1 ft./sec.
• Screens are available in up to 40 ft. lengths of continuously wrapped screen with no mid-weld• Technical information is available upon request for 316 stainless steel screens• P - pipe size, T - telescope• For application depths > 1,600 ft., contact Technical Support
1. Based on 0.030 in. slot size (collapse values contain no safety factor)2. Recommended hang weight is 50 percent of the calculated tensile strength3. Transmitting capacity in gpm./ft. of screen = open area x 0.31 @ 0.1 ft./sec.
• Screens are available in up to 40 ft. lengths of continuously wrapped screen with no mid-weld• Technical information is available upon request for 316 stainless steel screens• P - pipe size, T - telescope• For application depths > 1,600 ft., contact Technical Support
1. Based on 0.030 in. slot size (collapse values contain no safety factor)2. Recommended hang weight is 50 percent of the calculated tensile strength3. Transmitting capacity in gpm/ft of screen = open area x 0.31 @ 0.1 ft./sec.
Notes:
• Screens are available in up to 40 ft. lengths of continuously wrapped screen with no mid-weld• Technical information is available upon request for 316 stainless steel screens• P - pipe size, T - telescope• For application depths > 1,600 ft., contact Technical Support
Size(in.)
Max Depth:
(ft.)
OD: (in.)
ID:(in.)
Weight1: (lbs./ft.)
Recom. Hang
Weight2: (lbs.)
Collapse Strength1
(PSI)
Intake Area3 - sq in./ft of ScreenScreen Slot Size (thousandths of an in.)
HiCap™ High Capacity Low Carbon Steel Screens Large Diameter HiCap Screens: Sizes 6P -18T
Size(in.)
Max Depth
(ft.)
OD(in.)
ID(in.)
Weight1 (lbs./ft.)
Recom. Hang
Weight2: (lbs.)
Collapse Strength1
(PSI)
Intake Area3 - sq in./ft. of Screen
Screen Slot Size (thousandths of an in.)
30 40 50 60 80 100
6 P 2501,000
6.66.9
6.05.9
6.315.5
5,10014,500
2661,855
6330
7739
9047
10054
11867
13279
8 T 2501,000
7.57.7
6.76.7
8.717.9
12,90018,100
1821,340
7134
8843
10252
11460
13475
15088
8 P 2501,000
8.78.9
7.97.9
9.920.3
14,10019,900
117871
8339
10250
11860
13270
15587
174102
10 T 2501,000
9.59.7
8.68.6
11.122.6
16,70023,600
90674
9042
11154
12966
14476
17095
189111
10 P250600
1,000
10.910.910.9
9.89.89.8
25.225.225.2
25,40025,40025,400
476476476
484848
616161
747474
858585
106106106
125125125
12 T250600
1,000
11.411.411.4
10.610.610.6
27.127.127.1
29,00029,00029,000
476476476
484848
616161
747474
858585
106106106
125125125
12 P250600
1,000
12.912.913.0
11.811.811.8
29.531.234.3
29,00029,00029,000
288333502
566860
728676
8710392
101119106
126147132
148171155
14 T250600
1,000
12.612.612.6
11.511.511.5
27.527.529.1
23,60023,60023,600
309309357
555566
717184
8585101
99 99116
123123143
144144167
14 P/ 16 T
250600
1,000
14.114.114.1
13.013.013.0
31.331.333.1
28,10028,10028,100
221221255
626274
797994
9595113
110110130
138138160
162162187
16 P/ 18 T
250600
1,000
16.016.016.0
14.814.814.8
35.535.537.7
31,70031,70031,700
152152175
707084
9090
107
108108128
125125148
156156182
183183212
1. Based on 0.030 in. slot size (collapse values contain no safety factor)2. Recommended hang weight is 50 percent of the calculated tensile strength3. Transmitting screen = open area x 0.31 at 0.1 ft./sec.
Notes:• Screens are available in up to 40 ft. lengths of continuously wrapped screen with no mid-weld• Technical information is available upon request for 316 stainless steel screens• P - pipe size, T - telescope• For application depths > 1,000 ft., contact Technical Support
Page 10
Large Diameter HiCap Screens: Sizes 18P - 36P
Size(in.)
Max Depth:
(ft.)
OD (in.)
ID(in.)
Weight1:(lbs/ft.)
Recom. Hang
Weight2
(lbs)
Collapse Strength1
(PSI)
Intake Area3 - sq. in./ft. of Screen
Screen Slot Size (thousandths of an in.)
30 40 50 60 80 100
18 P/ 20 T
250600
1,000
17.917.918.0
16.716.716.7
39.041.546.1
32,60032,60032,600
108125190
789482
100120106
121144127
140165147
175204183
205237214
20 P250600
1,000
20.020.020.1
18.818.818.8
44.046.751.9
38,10038,10038,100
7890
137
8710592
112134118
135160142
157185164
195228204
229265239
24 T250600
1,000
21.921.922.0
20.720.720.7
48.751.757.4
43,50043,50043,500
5968
104
96115101
123147129
148176155
171202180
214249223
251290262
24 P/ 26 T
100250600
1,000
24.224.224.324.4
22.822.822.822.8
53.857.163.274.6
48,10048,10048,10048,100
445178
124
106127111149
136162143189
163194172224
189223198257
236275247313
277320289361
26 P
100250600
1,000
25.825.825.926.0
24.424.424.424.4
57.561.067.679.7
51,70051,70051,70051,700
364264
102
113136119159
145173152201
174207183239
202238211274
252294263334
296341308384
30 T
100250600
1,000
27.127.127.227.3
25.825.825.825.8
59.863.570.383.1
51,70051,70051,70051,700
31365588
118143125167
152182160211
183217192251
212250222287
265308276350
311358323404
30 P/ 36 T
250600
29.729.9
28.328.3
70.491.6
60,10060,100
2867
156183
199211
238275
274315
338384
393442
36 P100250600
100250600
35.735.835.9
34.334.334.3
69,80069,80069,800
83.992.9
109.3
162439
188164219
239210278
286292378
406364461
472426531
1. Based on 0.030 in. slot size (collapse values contain no safety factor)2. Recommended hang weight is 50 percent of the calculated tensile strength3. Transmitting capacity in gpm/ft. of screen = open area x 0.31 at 0.1 ft./sec.
Notes:• Screens are available in up to 40 ft. lengths of continuously wrapped screen with no mid-weld• Technical information is available upon request for 316 stainless steel screens• P - pipe size, T - telescope• For application depths > 1,000 ft., contact Technical Support
Page 11
Large Diameter HiCap Screens: sizes 6P - 16T
Hicap™ High Capacity Low Carbon Steel Galvanized Screens
Size(in.)
Max Depth
(ft.)
OD (in.)
ID(in.)
Weight1
(lbs/ft.)
Recom. Hang
Weight2 (lbs.)
Collapse Strength1
(PSI)
Intake Area3 - sq in./ft. of Screen
Screen Slot Size (thousandths of an in.)
10 20 30 40 50 60 80 100
6 P250
1,0006.66.6
6.05.9
6.37.9
5,1009,600
266266
2525
4646
6363
7777
9090
100100
118118
132132
8 T600
1,0007.57.7
6.76.7
9.216.6
12,10024,100
182573
2919
5237
7152
8865
10277
11488
134106
150121
8 P250600
1,000
8.68.78.8
7.97.97.9
10.414.918.8
13,30013,30026,500
121399385
332222
594142
825859
1017374
1178788
13199
100
153120121
172137139
10 T250600
1,000
9.39.59.6
8.68.68.6
11.716.621.1
19,00015,70031,300
96307297
352424
644546
886464
1098081
1269596
141108109
166131132
186150151
10 P100600
1,000
10.610.710.8
9.89.89.8
13.018.523.3
16,80016,80033,600
65215209
402727
735151
1017272
1249091
144107108
161122123
189147149
211169170
12 T100600
1,000
11.211.211.4
10.410.410.4
14.114.125.4
19,30019,30038,500
5555178
434329
777754
10610676
13113196
152152114
170170130
200200157
223223180
12 P100600
1,000
12.612.712.8
11.811.811.8
15.221.727.2
19,30019,30038,500
39129126
483232
876061
1208586
147107108
171127128
191144145
225175176
251200202
14 T100600
1,000
12.312.512.7
11.611.611.6
14.020.331.7
15,70015,70031,300
42135348
473225
855947
1178467
14410585
167125102
187142117
220172145
245197168
14 P/
16 T
250600
1,000
14.014.114.2
13.113.113.0
23.130.636.1
18,70018,70037,300
96255250
352727
665252
947475
1189495
140113114
159130131
193160162
221187188
Notes:• Screens are available in up to 40 ft. lengths of continuously wrapped screen with no mid-weld• Technical information is available upon request for 316 stainless steel screens• P - pipe size, T - telescope• For application depths > 1,000 ft., contact Technical Support
1. Based on 0.030 in. slot size (collapse values contain no safety factor)2. Recommended hang weight is 50 percent of the calculated tensile strength3. Transmitting capacity in gpm/ft. of screen = open area x 0.31 at 0.1 ft./sec.
1. Based on 0.030 in. slot size (collapse values contain no safety factor)2. Recommended hang weight is 50 percent of the calculated tensile strength3. Transmitting capacity in gpm/ft. of screen = open area x 0.31 @ 0.1 ft./sec.
Notes:• Screens are available in up to 40 ft. lengths of continuously wrapped screen with no mid-weld• Technical information is available upon request for 316 stainless steel screens• P - pipe size, T - telescope• For application depths > 1,000 ft., contact Technical Support
Page 13
Muni-Pak™ Pre-Packed Well ScreensMuni-Pak screens are pre-packed, providing numerous features and advantages for the contractor and well owner. A smaller borehole, stronger construction, thinner filter pack and maximized open area all combine for an energy and time saving well screen.
Size¹(in.)
Approx. Screen
ID (in.)
Approx. Screen
OD (in.)
Media Annular
Thick-ness(in.)
Inner Screen Open Area - sq. in./ft. of Screen
Outer Screen Open Area - sq. in./ft. of Screen Approx.
Pipe Based Well ScreensPipe based well screens combine the hydraulic efficiency of wire-wound screens with the strength of pipe. Because of the strength of the pipe liner, the wrap wires can be smaller, producing a greater open area.
The longitudinal support rods on the screen jacket create channels, which direct incoming flow to the nearest pipe perforation. Screen and pipe are welded to make a rugged, reliable unit suitable for deep vertical wells and supply wells.
Stainless Steel Pipe Based Well Screens
Size(in.)
Pipe OD (in.)
Pipe Open Area Per
ft./sq. (in2.)
Screen OD
(in.)
Approx. Weight (lbs.)
Open Area - sq. in./ft. of ScreenScreen Slot Size (thousandths of an in.)
Well ScreensGeneral: Well screens shall be of the continuous slot design to provide maximum open area, to reduce entrance velocity, increase hydraulic efficiency and promote more effective development. The well screens shall be constructed of Vee-Wire® trapezoidal wire, continuously wrapped around an array of equally spaced support rods of the same material. Each junction of wire/rod contact shall be resistance welded. The screens and end fittings shall be made of __________ (material). The well screens shall be the Johnson Screens product brand, or an approved equal.
Collapse strength: Well screens shall be __________ inches OD, continuous slot wire-wrapped __________ (material), designed to withstand a minimum collapse pressure of ______ psi for a _____ inch slot opening. The surface wire shape shall cause the slot opening to widen inwardly to minimize clogging. Surface wrap-wire height shall be _____ inches to provide the desired collapse strength. The wrap-wire face width shall be of minimum dimensions to provide _____ percent open area at the anticipated _____ inch slot opening.
Tensile strength: The minimum screen tensile strength must exceed at least twice the total weight of the screen and any standard wall blank casing suspended below the top screen joint. The tensile strength shall be a minimum of _____ pounds. (Tensile strength is total rod area times material yield strength.)
Screen configuration: Screens shall be manufactured in various lengths complete with __________ (material) weld rings attached to each end. The weld rings shall be standard available lengths as requested by the contractor and approved by the engineer.
Screen SubmittalsUpon request, the screen manufacturer shall provide a submittal and schematic drawing of the proposed screen design. The documents shall include the OD, ID, construction materials, slot size, approximate weight per foot, wrap-wire length, wrap-wire height, collapse strength, percent open area, inlet open area per foot, transmitting capacity per foot, number of support rods, diameter of support rods, total cross sectional rod area, material yield strength, tensile strength, column load and recommended hang weight.
Muni-Pak™ screensGeneral: Muni-Pak™ screens shall be of the continuous slot design to provide maximum open area, to reduce entrance velocity, increase hydraulic efficiency and promote more effective development. Both the inner and outer screens shall be constructed out of Vee-Wire traezoidal wire, continuously wrapped around an array of equally spaced support rods of the same material. Each junction of wire/rod contact shall be resistance welded. The screens and end fittings shall be made of __________ (material).The well screens shall be the Johnson Screens product brand, or an approved equal.
Diameter: The Muni-Pak screen shall be _____ inch pipe size inner screen by _____ inch pipe size outer screen.
Collapse: The dual screen assembly shall be manufactured with a wrap-wire designed to yield a minimum collapse pressure of _____ psi at a design slot opening of _____ inches. The wire shape shall cause the slot opening to widen inwardly to minimize clogging.
Open area: The inner screen shall provide _____ square inches of inlet area per foot of screen at the design slot size. The outer screen shall be of the same slot as the inner screen. The slot size and filter pack are to be selected on the basis of a sieve analysis of the water bearing formation.
Filter pack: The annulus between screens shall be filled with ceramic or glass beads of uniform size and excellent sphericity. The pack size shall be _____ filter size. The pack material shall be installed and compacted by vibrating the unit in a vertical position while being filled. The top and bottom filter seal plates shall be secured by welding.
Tensile strength: The minimum screen tensile strength must exceed at least twice the total hang weight of the screen and blank casing below the top screen joint. The tensile strength shall be a minimum of ___ pounds. (Tensile strength is total rod area times material yield strength).
Screen configuration: Screens shall be manufactured in various lengths with a maximum of 40 feet length overall. Screens shall be complete with _____ (material) and fittings attached to each end. Standard weld rings are six inches long on each end. Weld rings of longer lengths, or threaded fittings may be requested. Screen barrels shall be provided in standard _____ (overall or full) lengths which _____ (include or exclude) the weld ring lengths. Lengths and end fitting configuration to be requested by the contractor and approved by the engineer.
Specifications
Page 17
Di-Electric CouplingDi-Electric couplings prevent galvanic corrosion in municipal and industrial water well completions.
When two dissimilar metals are coupled in water-saturated environments, the less corrosion-resistant metal corrodes faster from the galvanic cell created. This corrosion can be prevented by eliminating the contact between the two metal surfaces.
A Di-Electric coupling uses non-conducting insulating ring material to isolate the metal surfaces and prevent electrical contact. This feature increases the life of the pipe and the life of the well.
Di-Electric couplings are available for pipe sizes from 1.5 - 24 in. Special sizes or connection adapters are available on request.
Features and Benefits
• In the center of the coupling, an insulating sleeve prevents dissimilar metals from making contact and causing corrosion of the casing. This feature extends the life of the pipe for long-term savings
• The coupling has a small OD, only 1.5 to 2 in. larger than the pipe. This feature saves costs by minimizing the size of the hole to be drilled
• The nominal ID of the string is maintained through the coupling for full design functionality
Page 18
With a well depth just over 1,630 feet, the CUWCD required a screen with extreme tensile and collapse strength for the installation depth.
Using square rods, in lieu of the typical round rods, the design met the required needs.
When tested, tensile strength of the square rod screen design was over 200,000 lbs., well over the calculated string weight of 164,100 lbs.
24 in. screen installed
Central Utah Water Conservancy District (CUWCD) 24 in. Culinary Well
Central Utah Water Conservancy District (CUWCD) 24 in. culinary well
Sample of screen used for the installation
Page 19
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Chemical Cleaning, Disinfection & Decontamination of Water Wells book is a concise, complete assessment of the important role certain chemicals play in modern water treatment, water system construction and maintenance programs.
Included in this text are complete descriptions of chemicals frequently used in water supply applications. With a focus on effective and efficient use of chemicals, individually or in combination, to achieve better well rehabilitation, water system cleaning and water quality treatment.
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