9 Subsea chemical storage and injection

There are several reasons why it is of interest to store and inject chemicals subsea. As the complexity of a field increases, the umbilical will become larger, more complex, and more expensive to manufacture and deploy.

The Subsea Chemical Storage and Injection would allow to enhance and/or enable oil and gas field developments, in particular for long subsea tie-backs to surface facilities located more than tens of kilometres away, where the economics could prove to be challenging with conventional electro-hydraulic umbilical.

9.1   Subsea Chemical Storage and Injection (SCS&I) by TOTAL and Technip FMC

TOTAL and TechnipFMC have agreed to work together on the development of the SCS&I Station as part of a collaborative project. Chemicals include corrosion inhibitor, demulsifier, scale inhibitor, biocide, LDHI, methanol.

The SCSI station includes storage tanks, control system, injection pumps, flow control devices and monitoring, valves.

Figure 9.1 - Chemical Storage Station general arrangement


9.2   Other Subsea Chemical Storage and injection System

Figure 9.2 - Subsea Chemical Storage System (SCSS) by Seatools


Figure 9.3 - Subsea Chemical Storage by NOV (MEG only)


Figure 9.4 - OceanWorks Subsea Fluid Injection System


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