SLOTTED SCREEN

1. Product Definition

The Slotted Screen is a sand control device made by laser-cutting slots into API-grade casing (e.g., N80). Key features include:

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  Slot Width: 0.20–0.40mm (optimized for coarse sand ≥0.3mm)

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  Structure: Axial/helical slots with low open area (1.1–2.7%) to balance sand retention and strength

2. Key Applications

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  Oil/Gas Wells:

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    Shallow horizontal wells in coarse-sand reservoirs (e.g., Liaohe Oilfield, China)

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    Thermal recovery (steam injection ≤350°C) for heavy oil

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  Water & Geothermal:

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    Groundwater extraction wells (e.g., drought-relief projects)

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    Geothermal brine reinjection (corrosion-resistant at pH 2–12)

3. Performance Limits

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  Unsuitable for:

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    Fine sand (<0.2mm) – upgrade to sintered mesh screens

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    Deep wells (>3,000m) – low collapse strength (45.6% of base pipe)

4. Standards & Compliance

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  SY 5182-87: Mandates slot precision and hydrostatic tests

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  ISO 9001: Ensures welding consistency and defect-free slots