Retrofit and upgrade of produced treatment vessels

A modular solution for meeting discharge requirements.

The Challenge

There are several kinds of vessels designed to separate oil and gas from water prior to discharge. This includes degassers, CFUs and Water Oil Separator (WOSEPs). 

Operators are often facing a situation where equipment is no longer able to handle increased water cut or that the processing equipment is not meeting discharge requirements.

Improving efficiency, increasing throughput while meeting discharge requirements are critical to maximizing profitability.

Our solution

Stauper has developed and has patented a concept for installation of its CFU internals into existing oil-water separation vessels.

The internals can be installed through existing manways, improving the vessel performance. The modication also includes installation of Stauper gas mixer outside of the vessel.

Following the modification, the vessel will operate according to the Stauper design philosophy.

New vessels can also be enhanced by including Stauper internals as part of the design.

Stauper´s internals design and modification methodology are patented


  • Low capex
    • – installation in existing process equipment.
  • Enhanced separation and performance
    • – meet discharge requirements
  • Stauper´s internals captures and flush out solids particles.
    • – reduce discharge and downstream erosion
  • Modification is fast and simple
    • – no recertification of vessel required


Retrofit at Equinor´s Martin Linge

Retrofit and upgrade of two existing compact flotation units at Equinor´s Martin Linge platform in the North Sea

Read the case study

Need more information on retrofit and upgrade?

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