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Why PEEK for Oil & Gas?
· Temperature: Continuous use at 250°C (downhole temps reach 150-200°C)
· Chemical resistance: Resistant to H₂S, CO₂, crude oil, drilling fluids
· Mechanical: 90-220 MPa tensile strength (grade-dependent)
· Creep resistance: Dimensional stability under sustained load
· Fatigue: Withstands pressure cycling (see fatigue guide)
· Electrical insulation: For subsea connectors
Downhole Applications
Seal Backup Rings
PEEK GF30 prevents extrusion of elastomer seals under pressures up to 20,000 psi (1,380 bar). Standard material for downhole sealing systems.
Electrical Submersible Pumps (ESPs)
PEEK insulation for motor windings and cables operating at 150-200°C downhole temperatures.
Sensor Housings
Protective housings for pressure/temperature/flow sensors. PEEK CF30 provides EMI shielding for electronics.
Subsea Applications
Electrical Connectors
PEEK insulator for subsea connectors at depths up to 3,000m and pressures up to 300 bar. 25+ year service life.
Flow Control
· Valve seats: PEEK+PTFE for low-friction sealing
· Bearing sleeves: PEEK CF30 for wear resistance
Grade Selection
Application | Grade | Key Property |
Seal backup rings | PEEK GF30 | Stiffness, creep resistance |
Electrical insulation | Natural PEEK | Dielectric strength |
EMI shielding | PEEK CF30 | Conductivity |
Wear components | PEEK+PTFE | Low friction |
PEEK vs Metal
Property | PEEK | Metal (316 SS) |
Density | 1.3-1.4 g/cm³ | 8.0 g/cm³ |
Corrosion | Excellent | Limited (pitting, SCC) |
Temperature limit | 250°C | 500°C+ |
Weight savings | 83% vs steel | — |
FAQ
Q1: Why PEEK for downhole?
Maintains properties at 250°C, resists corrosive fluids, provides insulation, outstanding creep/fatigue resistance.
Q2: Best grade for seal rings?
PEEK GF30 — stiffness and creep resistance prevent seal extrusion up to 20,000 psi.
Q3: PEEK vs metal?
6× lighter, corrosion-resistant, insulating. Preferred where corrosion failure is a concern.
Ready to source quality engineering plastics? Contact NAGOMER today for a free quote, or browse our PEEK sheets, POM rods, and ESD materials.
NAGOMER — Professional Engineering Plastics Solutions
www.nagomer.com | info@nagomer.com