GRE Screen Pipes | Composite Sand-Control Screens for CBM & Sour Wells – CNPS
Composite Sand-Control Screens That Outlast Metal Downhole
40% improved collapse resistance over API 5CT steel, 35% lighter, and an inert GRE matrix that shrugs off H₂S, CO₂ and produced water — laser-slot precision to 0.15 mm.
Product Overview
GRE screens are composite filter tubes — glass-reinforced epoxy, precision-slotted by laser — engineered for sand control in the wells where metal screens fail early. The inert GRE matrix resists hydrogen sulfide, carbon dioxide and produced water; removing metal also removes galvanic corrosion and reduces operating weight by about one-third.
Compared with API 5CT steel, the product delivers 40% improved collapse resistance (described in source materials as 40% more durable than metal screen pipe), 35% weight reduction that simplifies rig operation and cuts fuel consumption, and notch (slot) accuracy of 0.15–0.5 mm that effectively controls sand intrusion.
Screens are compatible with high-quality screen joints and elastomeric seals and can be used with familiar existing API connections — so field adoption does not require a new connection learning curve.
Why Choose GRE Pipes?
- Metal screens pit and crack in sour gas, CO₂ and produced water
- Screen failure in CBM wells means coal-fines invasion and lost gas production
- Heavy steel screens complicate rig logistics on mountain CBM fields and offshore platforms
- Sand control during frac packing and cleanup demands collapse resistance metal screens struggle to hold
CNPS Solution: Laser-slotted GRE composite screens with an inert epoxy matrix — 40% improved collapse resistance over API 5CT steel, 35% lighter, and customizable slot geometry, resin and reinforcement per well.
- 40% improvement in pressure collapse and cracking ratings protects screens during CBM cleanup and fracturing
- Laser slots of 0.15–0.50 mm filter coal fines while maximizing methane flow
- 35% lighter than steel improves logistics in mountain CBM fields and on offshore platforms
- Service life in acidic gas wells usually 2–3× longer than stainless steel — no pitting or sulfide stress cracking
- High-temperature resin rated 200 °C, steam-circulation tested for SAGD
- Customized per well: aperture, temperature curve, collapse range, resin formula and reinforcement plan
- Slot width: 0.15–0.50 mm laser-cut; standard increment 0.05 mm; custom sizes on request
- Size scope (reference): DN100 – DN250; 10 – 25 MPa
- Design basis (reference): SY/T 6267-2006 Glass Fiber Pipeline Specification
- Construction: glass-reinforced epoxy composite, bored and slotted by winding process
- Accessories: expansion packers, tracer carriers or flow-control devices can be pre-assembled
- Corrosion resistance — Inert GRE matrix resists attack by carbon dioxide, hydrogen sulfide and chlorides — ideal for sour coal seams.
- High pressure resistance — 40% improvement in pressure collapse and cracking ratings protects the screen during CBM cleanup and fracturing.
- Precise slots — Laser slots of 0.15–0.50 mm filter coal fines while maximizing methane flow.
- Lightweight — 35% lighter than steel, improving logistics in mountain CBM fields and on offshore drilling platforms.
- High-temperature capability — High-temperature resin system rated 200 °C, passed the steam circulation test with no reduction in compressive strength (SAGD application).
- Longer service life — In acidic gas wells, service life is usually 2–3 times longer than stainless steel; eliminates pitting corrosion and sulfide stress cracking.
- Per-well customization — Aperture size, temperature curve and collapse range from the customer; slot width, resin formula and reinforcement plan customized; can pre-assemble expansion packers, tracer carriers or flow-control devices.
Technical Specifications
| Item | Specification |
| Diameter / Size Range | DN100 - DN250; 10 - 25 MPa |
| Design Standard | SY/T 6267-2006 Glass Fiber Pipeline Specification |
⚙️Applications
- Coalbed methane (CBM) wells — sour coal seams
- Sour gas wells and deepwater projects where metal screens fail prematurely
- High-temperature steam-assisted gravity drainage (SAGD) wells
- Water source wells and horizontal CBM wells
- Sand control: withstands frac-packing loads and thermal cycling
🔧Installation / Connection
- Compatible with high-quality screen joints and elastomeric seals; usable with familiar existing API connections
- 35% lighter strings reduce rig load and fuel consumption during deployment
- Pre-assembled accessories (expansion packers, tracer carriers, flow-control devices) shorten run-in time
- Easily drillable construction per reference data — no safety hazard on contingency operations
🎨Project-Based Customization
- Aperture size, temperature curve and collapse range supplied by customer
- Slot width, resin formula and reinforcement plan customized
- Pre-assembly of expansion packers, tracer carriers or flow-control devices
- Sizes and pressure scope per well program — reference scope DN100–DN250, 10–25 MPa
💎Why CNPS
- Solution engineering — screens specified around your well's sand, temperature, collapse and completion program
- Downhole expertise — customization of slots, resin and reinforcement per well conditions
- System compatibility — joints, seals and API connections integrated for field adoption
- Performance transparency — documented collapse, weight and temperature data with sources
Frequently Asked Questions
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