High-temperature wells present unique challenges for any lift system. Jet pumps handle heat well because they have no downhole electronics, but temperature still influences fluid behavior, corrosion, and overall system reliability. This article describes the checks and adjustments needed to keep jet pump systems stable in high-temperature environments.
Temperature-Driven Risks
High temperatures can cause:
- Lower fluid viscosity, altering jet velocity
- Faster corrosion or material degradation
- Thermal expansion affecting seals and connections
- Accelerated scale or deposit formation
Each of these factors influences the pump’s energy transfer and power fluid requirements.
Identifying Temperature-Related Issues
Look for:
- Decreased pressure recovery in the diffuser
- Variations in intake pressure during thermal swings
- Higher corrosion residue in surface lines
- Unusual wear patterns in nozzles and throats
Temperature impacts may appear gradually, making trend analysis important.
Diagnostic Steps
- Review reservoir and surface temperature data to understand fluctuations.
- Check corrosion coupons or inspection points for accelerated wear.
- Validate power fluid properties at operating temperature.
- Inspect seals and fittings for heat-induced distortion.
Corrective Actions
- Select materials suited for elevated temperatures for key pump components.
- Adjust power fluid rate to maintain jet velocity when viscosity drops.
- Improve cooling or insulation in surface circulation lines as needed.
- Cycle chemical treatments to manage temperature-driven scaling or corrosion.
High-temperature wells can be stable jet pump candidates when these factors are managed proactively.