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PRESSURE DISTRIBUTIQN SYSTEM END,PERFORntIOti n ..
<br /> ;,_ . I
<br /> 1. Select number of perforated laterals STopsoil `
<br /> Leomy So„a lnr•, •• •..
<br /> 2. Select perforation spacing = 3_ feet • • "I
<br /> 3. Since perforations should not be placed closer than 1 ft. to �u --- HSM',•_ ,,
<br /> the edge of the rock layer (see diagram), subtract 2 ft. from Clean Sand rove, '''''
<br /> the rock layer length.
<br /> Original Soil Pope,I,
<br /> . 5. Oelote Fianna ;nn,l I n,1••
<br /> Rock layer length - 2 ft. = ', feet
<br /> TABLE.OF FERFORAI R 1:\* : '1,.,
<br /> •1. Determine the number of spaces between perforations.
<br /> Head Perforation.1:,,,•,.
<br /> Divide the length above by perforation spacing and round -----------,
<br /> down to nearest whole number. /,,
<br /> 1.oa 41111110
<br /> Length pert. spacing = > ", ft. _ ft. = 1 ( space' 20 `.h`'
<br /> (#3) (#2) 2.0h ; b,.
<br /> 5. Number of perforations is equal to one plus the number of 3.0 0.9"
<br /> 4.0 1.13 •
<br /> perforation spaces . 5.0 , ,h
<br /> �� spaces + 1 = G aUse 1.0 foot of head feu I. .,,I,., ,,,.,..• I
<br /> p ' erforations per lateral bUse 2.0 feet of head f,Ir nuu•t ,,:.:!,:I;; 1:,,•:,'• i
<br /> 6. Multiply perforations per lateral by number of laterals to
<br /> get total number of perforations.
<br /> Table 2
<br /> r
<br /> I perforations Maximum allowable number of touter inch perfnrli , t, r
<br /> laterals X perfs/lateral J p lateral to guarantee<10%Uischart e,arietiun
<br /> pt'=�r.tlnn,p.eing 1.25 inch ` 1 - 'H. is;,-
<br /> 7. Determine required flow rate by multiplying c.5 -- - -
<br /> 2.5 I 14
<br /> number of perforations by flow per perforation 3.0 I 13 C-
<br /> 3.3 12
<br /> 4.0 I 1
<br /> 5.0.l
<br /> 10 •
<br /> pears x Bpa,/pert= " gpm. --
<br /> 8. If laterals are connected to header pipe as shown on upper
<br /> example,select minimum required lateral diameter from
<br /> table 2; enter table with perforation spacing and number
<br /> of perforations per lateral. Select minimum diameter for .
<br /> perforated lateral = 2 inches •
<br /> 9. If perforated lateral system is attached to manifold piper jar
<br /> the center, as in lower example, perforated lateral length and
<br /> number of perforations per.lateral will be approximately one .,._..Y
<br /> half of that in # 6. Using these values, select minimum >�• " ' t'Y -.
<br /> diameter for perforated lateral from table 2 �; y:.�;• ;.._,_
<br /> perforated lateral = \ Y-1 inches
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