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How to calculate the contact area of the packer
Long packers
Size
Ln = Lg - (PI * (D - (d - 15))/2) - 210
Lateral packers
Size
7 - 10: Ln = Lg - (PI * (D - (d - 15))/2) - 120
10 - 15: Ln = Lg - (PI * (D - (d - 15))/2) - 140
15 - 20: Ln = Lg - (PI * (D - (d - 15))/2) - 180
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Legend
Ln ... contact length (mm)
Lg ... packer rubber body length (sleeve) (mm)
D ... pipeline diameter, for which contact
length is calculated (mm)
d ... deflated packer diameter (mm) |