stainless steel muni-pak screen

Johnson Screens stainless steel well screens
December 6, 2017
intake traveling water screen and Drum Intake Screens
December 8, 2017

The pre-packed construction of Muni-Pak screens allows the use of a smaller borehole versus gravel packed filtering

Johnson Screens’ solution for improving the gravel pack — the Muni-Pak screen. For contractors, this state-of-the-art, pre-packed screen eliminates the need for a larger borehole, shortens the time required to drill a well and speeds development time. It simplifies the contractor’s work and improves successful well development.

For the well owner, the Muni-Pak screen offers long-term benefits. This innovation uses ceramic or glass beads as the filter media — a concept that reduces the likelihood of filter pack fouling from biofilm and encrustation, lowering overall well maintenance costs.

Johnson Screens’ solution for improving the gravel pack — the Muni-Pak screen. For contractors, this state-of-the-art, pre-packed screen eliminates the need for a larger borehole, shortens the time required to drill a well and speeds development time. It simplifies the contractor’s work and improves successful well development.

For the well owner, the Muni-Pak screen offers long-term benefits. This innovation uses ceramic or glass beads as the filter media — a concept that reduces the likelihood of filter pack fouling from biofilm and encrustation, lowering overall well maintenance costs.

Utilizes a smaller borehole
Eliminates gravel placement
Shortens the amount of time required to drill a well
Reduces development time
Has a thinner filter pack
Reduces overall maintenance costs

Muni-Pak­ Screen Specifications

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Inner Screen Open Area –
sq. in./ft. of Screen

Outer Screen Open Area –
sq. in./ft. of Screen

Size¹
(in.)
Approx.
Screen ID
(in.)
Approx.
Screen OD
(in.)
Media Annular
Thickness
(in.)

Screen Slot Size
(thousandths of an in.)

Screen Slot Size
(thousandths of an in.)

Approx. Screen
Weight
(lbs/ft.)
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8

12

20

25

30

40

50

8

12

20

25

30

40

50

x

2 x 4

2.2

4.5

0.85

11

15

22

26

30

36

41

20

28

42

50

57

68

77

17

3 x 5

3.0

5.7

0.97

16

22

33

39

44

53

60

25

36

54

63

72

86

98

23

4 x 6

4.0

6.7

0.94

20

28

42

50

57

68

77

30

42

63

74

84

101

115

25

5 x 7

5.0

7.7

0.87

25

35

53

62

71

85

96

34

48

73

85

97

116

132

27

6 x 8

6.0

8.7

0.84

20

29

45

54

62

77

89

27

39

60

71

82

101

117

35

8 x 10

8.0

10.8

0.84

27

38

59

71

81

100

116

33

48

74

89

102

125

145

55

10 x 12

10.0

12.8

0.84

26

38

60

72

83

104

122

31

45

71

86

99

124

145

70

12 x 15

12.0

15.0

0.84

31

45

71

85

99

123

145

36

53

83

100

116

145

170

85

14 x 16

13.2

16.0

0.64

36

52

81

98

113

141

165

41

59

93

112

129

161

188

100

16 x 18

15.2

18.0

0.64

41

59

93

112

129

161

188

46

67

104

126

145

181

212

115

18 x 20

17.0

20.0

0.78

39

57

90

109

127

160

188

44

64

101

122

141

177

209

128

The Muni-Pak’s dual-screen construction is four times stronger than standard rod-based screens, allowing more aggressive development and better immunity to unexpected hole problems—providing lower costs.

Applications of stainless steel muni-pak screen
Controls sand infiltration in new, high-capacity municipal, industrial and agricultural wells
Can be used as a liner in existing wells to eliminate the need for constructing a new well
Custom applications such as infiltration galleries
Environmental remediations
Horizontal applications

The Muni-Pak’s dual-screen construction is four times stronger than standard rod-based screens, allowing more aggressive development and better immunity to unexpected hole problems—providing lower costs.

Muni-Pak works great as a liner in existing well construction, eliminating the need the construction and the cost of a new.

filter pack is one of the most common designs used today for high-capacity municipal, industrial and agricultural wells. Before the installation of a filter pack, the contractor and the well owner must take into account some significant issues:

  • The borehole must be sufficiently oversized to allow for adequate placement of the filter pack. In practice, an annular thickness of 3 to 5 in. is considered minimum. The oversized borehole is costly to the contractor (and therefore to the well owner) and keeps the crew on site for additional time.
  • The filter pack must be carefully selected, placed and developed to avoid bridging and sand pumping.
  • The well owner is concerned with long-term performance. Biofouling and encrustation are issues that will eventually affect performance.

 

 

 

 

 

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