The Development of Wire-line Sampling Drilling Tool for Gas Hydrates by Hole Bottom Freezing with Development of Wire-line Sampling Drilling Tool for Gas Hydrates by Hole Bottom Freezing with Liquid Nitrogen as External Cold SourceGas Hydrates by Hole Bottom Freezing with Liquid Nitrogen as External Cold Source

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The Development of Wire-line Sampling Drilling Tool for Gas Hydrates by Hole Bottom Freezing with Development of Wire-line Sampling Drilling Tool for Gas Hydrates by Hole Bottom Freezing with Liquid Nitrogen as External Cold SourceGas Hydrates by Hole Bottom Freezing with Liquid Nitrogen as External Cold Source
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Affiliation:College of Construction Engineering, Jilin University,College of Construction Engineering, Jilin University,College of construction Engineering,Jilin University,College of construction Engineering,Jilin University,College of construction Engineering,Jilin University,College of construction Engineering,Jilin University
Clc Number:P634.4 3
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Abstract:

According to the characteristics of existing environment and natures of gas hydrates, a new gas hydrates sampler with hole bottom freezing is developed. The sampling was realized by wire-line coring with liquid nitrogen as external cold source. The paper describes the freezing method, operating principle and the main structure features.

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Received:January 31,2013
Revised:May 26,2013
Adopted:May 31,2013
Online: June 20,2013
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