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1. Select number of perforated laterals .3 <br />2. Select perforation spacing = 3 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 />-757 - 2 ft. _ _l3 feet <br />Rock Layar LanSth <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 =_ ft. y 3 ft. _ �_ spaces <br />(#3) (#2) <br />5. Number of perforations is equal to one plus the r • amber of <br />perforation spaces. <br />e <br />spaces + 1 = .'2--�'_ perforations per lateral <br />Multiply perforations per lateral by number of laterals to <br />get total number of perforations. <br />x ZS = 5 perforations <br />Waal aperfe/latmval <br />7. Determine required flow rate by multiplying <br />number of perforations by flow per perforation <br />o •� 42 <br />'S <br />� x gpm. <br />END POWORATION OF A POWORATtiD LATERAL <br />Qrem Ceet► <br />rema <br />`,� , Low N ieemtmae IaIrk fr lam• <br />~ ANSaw <br />1sae bow of mr r W" .wMA <br />"terl <br />MMie�m wY* "WLE smear <br />N Lamm m!' to Ed" <br />•n�i1 el f"ia Low <br />►«wtll�lm" Latem"e el <br />Close So Lamer f"mrwe W Lamrem <br />Omme"mM Z. mMeee,#Y ftrNlN <br />Mwe P%'A" sees Lever <br />TABLE OF PERFORATION DLSCHARCES IN GPM <br />Had Perforation diameter (inches) <br />//S <br />m/t <br />1.0a <br />O36 <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 />S.0L21�0 <br />.26 <br />I AS <br />a Uot of head for reeidenW I systems. <br />bLet of head for other establishments <br />Table 2 <br />Maalmam Wigwag" aamger of gear iaeg MrfantiMt iW <br />lt"rat" real"<Ita�lXmfCtl ear:= <br />1.25 inch <br />1 1.5 inch <br />2.0 inch <br />2.5 <br />14 <br />18 <br />28 <br />3.0 <br />13 <br />17 <br />26 <br />3.3 <br />12 <br />16 <br />25 <br />4.0 <br />11 <br />15 <br />23 <br />5.0 <br />10 <br />14 <br />22 <br />8. If laterals are connected to header pipe as shown on upper <br />example, select minimum required lateral diameter from <br />table Z enter table with perforation spacing and number <br />of perforations per lateral. Select minimum diameter for <br />perforated lateral = 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 be approximately one <br />half of that in # 6. Using these values, select minimum <br />diameter for perforated lateral -n table 2 <br />perforated lateral = Z .1es <br />r r�rew�. v"wa <br />