== Abstract ==

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Sir Humphry Davy witnessed the first chlorine hydrate crystallizing in 1811. Couple of century later his discovery, natural gas hydrates has begun to play an important role in energy business. From being a mere chemical curiosity, they have proven to be a nuisance for the natural gas industry. The problem of hydrate induced blockage in “wet gas” flow systems has been widely reported and became a major flow assurance issue in the energy sector[1]. The importance of pipeline blockage increased in the 70’s when plugging of even the largest diameter pipelines from offshore, arctic fields or the wells from high-pressure underground storage facilities were reported. Studies over the past two decades showed that large gas hydrate plugs form most often after shut-in pipelines or wells begin to flow[2]. When a pipeline is shut-in, the fluid separates into the gas water and hydrocarbons as the temperature decreases[3].

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== Original document ==

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The different versions of the original document can be found in:

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* [http://www.intechopen.com/articles/show/title/natural_gas_hydrates http://www.intechopen.com/articles/show/title/natural_gas_hydrates]

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* [https://www.intechopen.com/chapter/pdf-download/35291 https://www.intechopen.com/chapter/pdf-download/35291] under the license cc-by

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* [http://www.intechopen.com/download/pdf/35291 http://www.intechopen.com/download/pdf/35291],

: [http://dx.doi.org/10.5772/38301 http://dx.doi.org/10.5772/38301]

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* [https://www.intechopen.com/books/advances-in-natural-gas-technology/natural_gas_hydrates https://www.intechopen.com/books/advances-in-natural-gas-technology/natural_gas_hydrates],

: [http://cdn.intechopen.com/pdfs-wm/35291.pdf http://cdn.intechopen.com/pdfs-wm/35291.pdf],

: [http://cdn.intechopen.com/pdfs/35291/InTech-Natural_gas_hydrates.pdf http://cdn.intechopen.com/pdfs/35291/InTech-Natural_gas_hydrates.pdf],

: [https://academic.microsoft.com/#/detail/1535498123 https://academic.microsoft.com/#/detail/1535498123]

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