Mitigant for high rates of gas bubble and fluid expansion in a VST

[Chinomso]

Greetings,

Please, what could cause high rate gas bubbles and fluid expansion that highly exaggerates the meniscus of liquid level on the sight glass of a vertical surge tank (VST) during a well testing operation, and what can one do in detail to mitigate this condition that gives an erroneous tank factor.

thanks

 

[dcasto]

I'd try closing the gauge lower tap valve to limit the influx of the liquid that is flashing in the gauge glass. Don't close the ball check valve as it is a safety device, there should be a valve between it and the vessel, that is the valve to pinch. Now, the reaction time from the vessel level to the site gauge will be off by a second or two.

 

[dcasto]

By closing, I mean slightly, not all the way

 

[Chinomso]

Dear Dcasto,

thank you for your idea, however, what i need is more like a design solution or an operation solution that would affect the activity in the entire vessel, as you know, the sight glass represents a cross section of the vessel of the VST as well as the activities(oil expansion and excessive gas bubbles) in it, which a little opening of the lower valve would not stop these activities. again, when acquiring our meter and shrinkage factors that it determined with time, how do i factor the communication delay of the level indication between the vessel and the sight glass/guage?


thank you