High-Performance Slotted Liners: Advanced Sand Control Solutions for Oil & Gas Wells.
Engineered to Maximize Production & Minimize Maintenance
API 5CT-compliant slotted pipes are precision-manufactured to prevent sand ingress, reduce well interventions, and enhance structural integrity in vertical, directional, and SAGD wells. Featuring 0.012–0.060” (0.3–1.5 mm) slot widths, these liners achieve up to 98% sand retention efficiency (ISO 17824 tested) while maintaining 85–92% open flow area.
Key Specifications & Certifications
- OD Range:
- Casing: 4½”–20” (114.3–508 mm) | Tubing: 1.05”–4½” (26.7–114.3 mm).
- Wall Thickness: 0.205”–0.875” (5.21–22.22 mm) | Length: 16–48 ft (4.88–14.63 m).
- Standards: API 5CT, ISO 11960, GOST 632-80, JIS G3439.
- Threads: STC, LTC, BTC, EU, NU, PH-4/6 (API 5B compliant).
Slot Types: Precision-Cut for Optimal Flow & Durability
1. Straight Slots (Standard)
- Geometry: 90° right-angle cut with uniform ID/OD width.
- Applications: Low-cost solution for coarse sand (>0.5 mm).
- Limitation: 25% higher plugging risk vs. keystone slots.
2. Keystone Slots (Premium)
- Geometry: 7–15° tapered design (wider ID, narrower OD).
- Benefits: Reduces clogging by 40% in fine sand (<0.1 mm).
- Performance: 15% higher flow capacity (API RP 19B).
3. Slot Patterns
| Pattern | Slots Per Meter | Strength Retention | Key Use Case |
|---|---|---|---|
| Line | 120–200 | 85% | Shallow Vertical Wells |
| Staggered | 150–240 | 90% | HPHT Reservoirs |
| Gang (Multi) | 200–300 | 95% | SAGD Thermal Wells |
Materials & Grades for Harsh Environments
- Carbon Steel: J55 (55 ksi yield), K55, N80 (80 ksi yield).
- Corrosion-Resistant: L80-13Cr, C95, T95 (H₂S/CO₂ service).
- High-Strength: P110 (110 ksi), Q125 (125 ksi) for ERD wells.
Composition Control:
- Sulfur (S): ≤0.015% | Phosphorus (P): ≤0.020%.
- Chromium (Cr): 12–14% in 13Cr grades (ISO 15156-3).
Quality Assurance & Testing
- Laser Slot Cutting: ±0.002” width tolerance (ASME B46.1).
- NDT Inspections: UT (ASTM E317) + MPI (ASTM E1444).
- Third-Party Verification: SGS, DNV, BV, API Q1 audits.
Competitive Advantages
- Lead Time: 15–30 days (MOQ 50 joints).
- Customization: Slot widths from 0.3 mm, helical/oval patterns.
- Warranty: 5-year anti-corrosion guarantee for 13Cr grades.
Applications by Industry
- Oil & Gas:
- SAGD: Gang-pattern liners for 600°F steam injection.
- Shale Gas: Staggered slots in lateral wellbores.
- Geothermal: 13Cr grades for brine corrosion resistance.
- Water Wells: Line-pattern PVC-coated screens.
Technical Comparison
| Parameter | Straight Slots | Keystone Slots | Gang Slots |
|---|---|---|---|
| Slot Cost | $1.20/ft | $1.80/ft | $2.50/ft |
| Sand Retention | 85% (>0.5 mm) | 98% (>0.1 mm) | 95% (>0.3 mm) |
| Max Temp | 250°F | 350°F | 600°F |
Request Slot Design Guides or Custom Pattern Prototyping Today!
Trusted by Operators in Permian, Alberta & Oman Since 2005.
Packing And Delivery
