Hydraulic Fracturing: High-Pressure Packing Elements in HNBR
Problem Statement
Hydraulic fracturing (fracking) demands packing elements capable of withstanding extreme pressures (up to 15,000 psi), high temperatures (up to 150°C), and aggressive chemical exposure (e.g., hydrocarbons, acids). Traditional NBR compounds fail due to chemical degradation and excessive compression set under cyclic loading.
Material Science Analysis
Hydrogenated Nitrile Butadiene Rubber (HNBR) excels in fracking applications due to its saturated polymer backbone. The hydrogenation process eliminates double bonds, enhancing thermal stability and chemical resistance. HNBR’s high acrylonitrile content ensures superior resistance to hydrocarbons, while its fluorine-free composition maintains cost-effectiveness compared to FKM.
Technical Specs
- Shore A Hardness: 80 ± 5
- Tensile Strength: 25 MPa
- Elongation at Break: 350%
- Temperature Range: -40°C to 150°C
- Compression Set (70h @ 150°C): ≤ 20%
Material Comparison
| Material | HNBR | NBR | FKM |
|---|---|---|---|
| Temperature Range (°C) | -40 to 150 | -30 to 120 | -20 to 200 |
| Compression Set (%) | ≤ 20 | ≥ 40 | ≤ 15 |
| Chemical Resistance | High | Moderate | Very High |
| Cost Efficiency | High | Very High | Low |
Standard Compliance
RubberQ adheres to IATF 16949 standards, ensuring batch-to-batch consistency in HNBR compounding. Our in-house mixing process (A炼) controls polymer ratios, fillers, and curing agents to meet ASTM D2000 specifications. ISO 3601 compliance guarantees sealing performance under high-pressure conditions.
For custom material compound development or IATF 16949 documentation, consult RubberQ’s engineering department.
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