Performance Chemical Dosing Application

Since the SPE Offshore Europe Exhibition in Aberdeen last September Bronkhorst UK has seen a marked increase in applications for performance chemical injection for both onshore and offshore production facilities. These performance chemicals, such as demulsify, biocide, scale inhibitor, corrosion inhibitor and wax inhibitor are highly concentrated and are often required to be injected at very low flow rates.

The traditional method of chemical injection, a piston pump with check valves on the inlet and outlet, is tried and tested and works well for quite long periods of time.  However, on occasion the check valves can foul and begin to ‘pass’.  Also, out-gassing or entrained air can cause an airlock within the piston chamber that is simply compressed/decompressed in situ rather than pumped. In each of these cases the pump appears to be still working but there is no actual transfer of chemical into the pipeline. The only way to verify actual flow has been via a graduated gauge and a stopwatch; an empirical measurement but time consuming. 

Modern communications networks now allow for technology to arrive at diffuse production fields. The Bronkhorst CORI-DOSE system can be installed at each injection point and real-time monitoring, control and logging of injection rates can be achieved.  This allows for remote checking of flow rates, remote instantaneous re-setting of those flow rates, on-board auto-alarm for status checking (for example, empty tank alarm and pump protection shut down), density change alarm, single point totalisation, multi-point (total field) totalisation for cost per barrel calculations and pump steering signal monitoring as a guide to preventative maintenance. In short, a very powerful tool within field management.  

For more information on the Mini Coriolis instrument please contact us; Bronkhorst UK Ltd, Email: sales@bronkhorst.co.uk, T: 01223 833222

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