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The analysis of core samples is an essential component in the evaluation of natural gas hydrate (NGH) reserves. To prevent NGH volatilization in the sampling process, the commonly employed pressure-temperature preservation technique is used to maintain the temperature-pressure condition of the NGH core at its in situ value. However, the structure of a typical pressure-temperature preservation sampler...
In order to prove the reserves of gas hydrates, the method that how to achieve the truth-preserve sample is one of the key technologies. The wire line sampler for gas hydrates by hole bottom freezing is designed, that the dry ice freezing method is applied. The parameter, freezing method principle, general structure, operating principle and structure features of sampler is researched. The study has...
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