液氮冷源外置式天然气水合物孔底冷冻绳索取样器的研制

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

摘要:

针对天然气水合物存在环境和性质的特殊性，研制了新型天然气水合物孔底冷冻取样器。取样器采用冷源外置式，通过绳索取心方式，实现孔底冷冻岩样。介绍了新型取样器的冷冻方式、工作原理和主要结构特点。

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.