EPC Contractor Needed – Gas Compressor Revamp & Gas-Lift System Upgrades (20+ yr-old Unit)

[menatrade]

We’re seeking qualified EPC contractors for a comprehensive revamp of a legacy gas compression/gas-lift system with the following scope:

Key Issues:

1. Compressor runs at >100% speed due to lower MW gas – Re-wheel or trim impellers
2. Severe rotor fouling (iron sulfide/salt) – Chemical wash vs. coatings?
3. Condensate-induced pressure drops – Compact exchangers vs. pipeline redesign

Questions:

• What’s the most cost-effective way to extend life 10+ years?
• Critical pitfalls to avoid with legacy turbine-compressor packages
• Recommended vendors for mid-range custom revamps (not full OEM replacement)

In summary

• Centrifugal compressor upgrades: Re-wheel for lower MW gas, dry gas seals, vibration control (iron sulfide/salt fouling).
• Condensate management: Replace corroded exchangers (E-306A/B/C), optimize gas-lift network.
• DCS migration: Mark-II → Mark VIe + Emerson DeltaV.
• Corrosion mitigation: GRE/3LPE piping, chemical injection.

Requirements:

• Prior experience with 20+ yr-old turbomachinery in oil/gas.
• API 617/672 compliance.
• Ability to phase works (minimize downtime).

 

[georgeverghese]

Since you plan to move from oil seals to dry gas seals on K303, and given the low mol weight gas service requirement, it is most likely new compressors will be required to operate with the existing GTs' for these machines.
Compressor rotor fouling may require changeout of demisting devices on upstream separators and preferably additional gas filter / coalescer units.
Problems with gas hydrocarbon dewpoint control may be due to design / controllability issues also - PFD not shown at the moment.
Gas to gas heat exchangers are much preferred for hydrocarbon dewpoint control for fuel gas feed to GTs' - heating is not a good idea.