| Type | American epoxy phenolic coating (powder) |
| Color | Yellowish brown |
| Thickness | 150–300 microns |
| Adhesion | Grade A |
| Roughness (Ra) | < 0.5 μm |
| Hardness | ≥ 7H |
| Corrosion resistance (sandblasting method) | ≥ 2.0 L/μm |
| High-temperature high-pressure test (pH=12.5, 148°C, 70MPa) | ≥ 24 hours, no blistering, no cracking, adhesion unchanged |
| Bending resistance | -30°C, 2.5° bend, no visible cracks |
| Recommended service temperature | ≤ 170°C |
| Pressure resistance | Meets tubing pressure limit |
| pH resistance range | pH 3–13 |
| Main application scope | Oil well drilling and completion |
WT200 is an epoxy-phenolic modified coating primarily designed for use across a wide range of temperatures and pH environments.
It offers outstanding corrosion resistance, is compatible with various mud systems, and extends drill string service life by 3-4 times.
It exhibits outstanding low-friction properties, improving water circulation efficiency and reducing pump pressure. This can save 10%-25% of drilling power and decrease energy consumption during drilling operations.
The coating boasts a long service life and maintains its integrity even after repeated use.
