Further to our recent works on FPSO (Floating Production Storage and offloading) vessels, Greenray Field Service were once again in high demand. One of our Engineers was mobilised and tasked with an essential repair to the port-side stripping pump on an FPSO vessel, offshore Angola, which had failed in service.

The stripping pump was disassembled, both steam and fluid side, with all the component parts being inspected. The conclusion to the pump failure was found to be that the liquid side suction and delivery valves had failed.

Due to the nature of the failure, the strainers and pipework were thoroughly cleaned to remove all signs of debris. The steam side of the pump was found to be in a satisfactory condition, with only the piston rings requiring replacement.

Associated drain and vent valves were inspected, and verified as being fully operational.

Pre-commissioning/recommissioning of the unit was carried out checking all settings against original OEM data.

Load to the pump was slowly applied during recommissioning, at all times ensuring the pump wasn’t overloaded, while checking the stroke and speed. The unit was left running with no operational issues being noted.  

Photographs show the failed valves, new replacement valves and finished rebuild of the right hand side.

We were pleased to have very favourable feedback from the Offshore Maintenance Superintendent.

“Greenray are welcome back on board because of quality, commitment and competency.”

Excellent work, once again!