A ‘top-of-line’ (TOL) corrosion model is adapted to estimate rates of hydrate film growth on the wall in low-liquid-holdup flowlines. Water droplet deposition rates, as a function of the angle from the top of the pipe, are coupled with a kinetic hydrate growth model. For the first time, this two-dimensional model predicts the characteristic ‘keyhole-like’ hydrate deposit cross sections observed in flowloop experiments. This represents a significant advance in accurately predicting the hydrate deposit thickness -which is not always uniform around the pipe inner periphery – and is a key step towards implementing sloughing and jamming models.
Predicting Hydrate Film Growth on the Wall From Water Droplet Deposition in Gas-Dominant Flowlines
Charlton, Thomas B., Norris, Bruce W. E., Johns, Michael L., May, Eric F., Aman, Zachary M., Zerpa, Luis. E., and Carolyn A. Koh. "Predicting Hydrate Film Growth on the Wall From Water Droplet Deposition in Gas-Dominant Flowlines." Paper presented at the BHR 19th International Conference on Multiphase Production Technology, Cannes, France, June 2019.
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