干冰升华式孔底冷冻取样器冷源保冷方法的试验研究

Experimental Study on Cold Source Insulation Method for Gas Hydrates with Dry Ice Sublimation Hole Bottom Freezing Sampler

摘要:

针对已研制的天然气水合物孔底冷冻取样器，为进一步提高取样器干冰冷源的保冷效果，提出干冰冷源双层保冷方法。通过试验研究，证明干冰冷源双层保冷方法可大幅度提高干冰在井内的保存时间，可以将此方法应用于取样器的设计。

Abstract:

In order to improve the cold insulation effect of dry ice cold source of sampler, double-layer cold insulation method for dry ice cold source was put forward. It was proved by experiment that double layer cold insulation method for dry ice cold source could greatly prolong preservation time of dry ice in the hole bottom, and this method can be applied in the sampler design.