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PRESSURE DISTRIBUTION SYSTEM <br />END PERFORATION OF A PERFORATED LATERAL <br />1. Select number of perforated laterals <br />2. Select perforation spacing = 2.5 feet <br />3. Since perforations should not be placed closer than 1 ft. to <br />the edge of the rock layer (see diagram), subtract 2 ft. from <br />the rock layer length. <br />Rork layer length - 2 ft. - feet <br />4. Determine the number of spaces between perforations. <br />Divide the length above by perforation spacing and round <br />down to nearest whole number. <br />Length perf. spacing =L ft. ft. _If C-1 <br />spaces <br />(#3) (#2) <br />5. Number of perforations is equal to one plus the number of <br />perforation spaces . <br />l9 spaces + I = 20 perforations per lateral <br />6. Multiply perforations per lateral by number of laterals to <br />get total number of perforations. <br />leterral a x peris7tenl= 60 perforations <br />7. Determine required flow rate by multiplying <br />number of perforations by flow per perforation <br />(,,P-fs x a-, f - gpm. <br />�-Grove CORM <br />-L <br />TOMeII <br />• <br />Loree of 1160=1le Foaelc (o. tow <br />• Lear" Sara Loses InU. IeyM er IIaY se .rya. <e.er.4 <br />.d. rya .-,. Paps., <br />Pertorol.on Drilled Helllonla 11, <br />.. Cap Hear Too <br />.• Plus <br />�Inla <br />AI Level 12�10 Edge <br />- Relit Race <br />of Racx Loner <br />'k-Perlarauode Lacoled at <br />Clfon SWd Loner <br />Bollom of Lateral <br />L Orlge,al soil Properly Scultied <br />Belle Plocino Sand Loro <br />TABLE OF PERFORATION DISCHARGE'S IN GPM <br />Head Perforation diameter (inches) <br />/p <br />/e <br />1.02 <br />0.56 <br />0.74 <br />1.5 <br />0.69 <br />0.90 <br />2.Ob <br />0.80 <br />1.04 <br />2.5 <br />0.89 <br />1.17 <br />3.0 <br />0.98 <br />1.28 <br />4.0 <br />1.13 <br />1.47 <br />5.0 1 <br />1.26 <br />1.63 <br />aUse 1.0 foot of head for residential systems. <br />bUsc 2.0 feet of head for other cstablietimen;s <br />Table 2 <br />Maximum allowable number of qualer inch perforations per <br />lateral to guarantee liar Discharta variation <br />perrwellee erl Ing! <br />1.25 inch <br />� inch 1.5 � 2.0 inch <br />tl�> <br />I <br />18 <br />2.5 <br />1 14 <br />3.0 <br />1 13 <br />17 <br />3.3 <br />I 12 <br />16 t� <br />4.0 I <br />11 <br />15 23 <br />5.0 ; <br />10 I <br />14 22 <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 pipe near <br />the center, as in lower example, perforated lateral length and <br />number of perforations per lateral will be approximately one <br />half of that in # 6. Using these values, select minimum <br />diameter for perforated lateral from table 2 <br />perforated lateral = inches <br />--� <br />/ �. •� licir - <br />•'rleturca <br />