Traditional filters were unable to remove black powder contamination with efficiency from the glycol system, leaving the entire system highly contaminated. This was degrading the quality of glycol and reducing its ability to dehydrate the gas. During the dehydration phase, if the temperature of the glycol is volatile (this occurs when high levels of iron are present), the likelihood of vaporization loss is increased, causing loss of production. ENI required a system that would allow for extended change out and cleaning intervals.
Alex Priori of Renox suggested installing a BPS magnetic separator in order to remove the black powder to sub-micron levels and improve the quality of the glycol.
Photos show the black powder removed from the glycol line after two days. The magnetic element reinserted in the magnetic separator housing and immediately removed, again covered in black powder. Analysis of the trapped black powder indicates that 74% was non-ferrous (45% Phosphorous and 24% Silica) and 26% was ferrous. The removal of this Black Powder will improve the uptime of the system, reduce production loss and reduce required maintenance.
BPS recommends the installation of a Magnetic Separator before each pump as they offer no flow restriction, posing no cavitation issues, while protecting the pump integrity. BPS further recommends a Kidney Loop System (holding capacity 13+lbs) offering 24/7 separation to remove the Black Powder in the reservoir. These systems would only require cleaning every 6 months to 1 year dependent on contamination levels.
March 30, 2017
Glycol, Hydrocarbon Fluids, Midstream, Offshore, Upstream