stainless steel muni-pak screen

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

xz	xz	xz	xz	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.)
xz	xz	xz	xz	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.