Wire-wrapped screens offer another alternative for retaining the gravel in an annular ring between the screen and the formation. Wire-wrapped screens have substantially more inflow area than a slotted liner, asFig. 4 illustrates.
Screen tolerances are typically plus 0.001 and minus 0.002 in.; hence, a specified 0.006-in. the slot could vary in slot width from 0.004 to 0.007 in.
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