Category Archives for Hydrates

Kinetic Inhibitor and Anti-Agglomerators

A kinetic inhibitor is a polymeric chemical that, when added to a production stream, will not change the hydrate formation temperature but will delay the growth of hydrate crystals. These chemicals are polymericand include N-vinylpyrrolidone (5 ring), saccharides (6 ring}, … Continue reading

15. September 2009 by Jack
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Thermodynamic Inhibitor #2

First the amount of water that will be condensed will be determined from Figure 4-6, assuming the gas is saturated at reservoir conditions. Water content (8,000 psig and 224°F)= 230 Ib/MMscf Water content (4,000 psig and 65°F) = JK) Ib/MMscf … Continue reading

15. September 2009 by Jack
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Thermodynamic Inhibitors #1

1. Chemicals can be injected into the production stream to depress the likelihood of significant hydrate formation. 2. A therrnodynamic inhibitor alters the chemical potential of the hydrate phase such that the hydrate formation point is displaced to a lower … Continue reading

15. September 2009 by Jack
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Temperature Drop Due To Gas Expansion

Choking, or expansion of gas from a high pressure to a lower pressure, is generally required for control of gas flow rates. Choking is achieved by the use of a choke or a control valve. The pressure drop causes a … Continue reading

15. September 2009 by Jack
Categories: Hydrates | Tags: | 1 comment

Condensation of Water Vapor

One method of assuring that hydrates do not form is to assure that the amount of water vapor in the gas is always less than the amount required to fully saturate the gas. Typically, but not always, the gas will … Continue reading

15. September 2009 by Jack
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Determination of Hydrate Formation Temperature or Pressure

Knowledge of the temperature and pressure of a gas stream at the wellhead is important for determining whether hydrate formation can be expected when the gas is expanded into the flow lines. The temperature at the wellhead can change as … Continue reading

15. September 2009 by Jack
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Hydrates

Resembling dirty ice, hydrates consist of a water lattice in which light hydrocarbon molecules are embedded. They are a loosely-linked crystalline chemical compound of hydrocarbon and water called cathrates, a term denoting compounds that may exist in stable form but … Continue reading

15. September 2009 by Jack
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