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1. A refrigeration expansion process is used to reduce water (and condensate) content of gas well production. The well stream arrives at a free water knockout drum at 2000 psia and 160°F at the surface. It is then cooled in heat exchanger and flashed through the choke into the separator. The separator pressure is controlled at 1000 psia. The separator temperature is controlled at the lowest possible temperature that will not result in hydrates being produced in the separator.

Reservoir Conditions:
P = 3000 psia
T = 200°F
Gas Gravity = 0.7
Flow Rate = 10 MMcfd

Calculate the following:
(a) Barrels of water per day removed at free water knockout drum.
(b) Separator temperature, °F.
(c) Barrels of water per day removed at the separator.
(d) Additional Barrels of water per day that must be removed from separator gas if sales specification is for a 15°F dew point at 1000 psia.

2. A 0.7-gravity gas is at the 1200 psia and 100°F. How far this gas can be expanded without hydrate formation.

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