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. E-26 <br /> . ... , . <br /> . � ' PRESSURE DISTRIBUTION SYSTEM <br /> 1. Select number of perforated laterals 3 � <br /> 2. Select perforation spacing=�ft. <br /> 3. Since perforaHons should not be placed closer than 1 ft. to <br /> the edge of the rock layer(see p. E-14),subtract 2 ft. from the <br /> rock layer length. <br /> ,��,�-2 ft. _�ft. � <br /> 4. Determine the number of spaces between perforations. <br /> Divide the length above by perforation spacing and round E-17a <br /> down to nQarest whole number. <br /> • N <br /> Head Perfotatlon diametec(Inches) <br /> Length perf. spacing= S�ft.+�ft. _�2 spaces �i32 �i4 <br /> I.Oa 0.56 0.74 <br /> l.5 0.69 0.90 <br /> 5. Number of perforations is equal to one plus the number of 2•� �•� �•� <br /> 2.5 0.89 1.17 <br /> perforarion spaces . a.o o.�s i.�s <br /> 4.0 1.13 1.47 <br /> �spaces + 1 =_�perforations/lateral .u��.o r�oc�h����,�w��,�. <br /> bUse 2.0 feet of hed for other ahbli�hmenb <br /> 6. Multiply perforations per lateral by number of laterals to <br /> get total number of perforations. E-17b . - <br /> _� �Si� �I�f�rw�Y�nd�rrlr/�Mlrwlr <br /> x S rforations. `�°`°�"""d"' <br /> �,��..�. �.n.�.�-—�-Pe �,:> i �, i � . � <br /> 2.5 14 18 Z8 <br /> 7. Determine required flow rate by multiplying 3.0 �3 i� 26 <br /> number of perforations by flow p�r perforation a o ii is i3 <br /> (see page E-17) s.o io ia 22 <br /> .L2�_ " <br /> �r, x �,i�r=-`� gpm. E-15 <br /> rwas�eune a ee s wsR�n�rnw s�na� <br /> "�' <br /> 8. If laterals �re mnnected to header pipe as shown on page E- ,�. <br /> 15, select minimum required lateral diameter from table on �,r � <br /> page E-17;enter table with perforation spacing and number ,,,.��'' �" <br /> of perforations per lateral. Select minimum diameter for `/''� <br /> perforated lateral = inches. <br /> E-12 <br /> ���� <br /> 9. If perforated lateral system is attached to manifold pipe near ��""'�_ <br /> � <br /> the center,as on page E-12,perforated lateral length and ''w <br /> number of perforations per lateral will be approximately one "�'�'�`�� . � <br /> half of that in step 8. Using these values,select minimum .... � <br /> diameter for perforated lateral from page E-17 as '� •''� ""� <br /> inches. <br />