Electric compression evaporation direct cooling type ice-bound pressure retaining corer

Abstract

The invention discloses an electric compression evaporation direct cooling type ice-bound pressure retaining corer. A fully sealed type refrigeration compressor is used for compressing refrigeration agents and directly performs refrigeration through evaporation at the outer wall of an ice valve pipe; and a fully sealed direct current compressor provides electric energy for driving through the short circuit connection of a hole bottom storage battery. The fully sealed type refrigeration compressor is used as a cold source; all refrigeration agent passages are connected through welding connectors; the problem of work incapability of a refrigeration system due to entering of liquid such as water into a refrigeration agent circulation pipeline can be effectively avoided; the required refrigeration quantity is regulated through regulating the electricity storage quantity of the storage battery; the sufficient cold quantity supply can be ensured; the system complexity is greatly reduced; the storage battery provides the power supply, so that the refrigeration compressor can be in a work state until a rock core sample is taken out from the ground surface in the whole rock core extraction process; and the continuous refrigeration is performed, so that the ice valve sealing reliability in the core taking operation process can be ensured.

Description

technical field [0001] The invention relates to a natural gas hydrate drilling insulation and pressure-maintaining coring device, in particular to an electric compression evaporation direct cooling ice-sealed pressure-maintaining coring device. Background technique [0002] Natural gas hydrate has attracted extensive attention because it is used as an alternative energy source in the future and has an important impact on submarine landslides and greenhouse effects. Taking in-situ high-fidelity gas hydrate samples by drilling means is the most direct method to study the related geophysical and geochemical properties of gas hydrate reservoirs and understand the concentration and reserves of gas hydrates. The patent publication number is CN101706379A. The ice valve heat preservation and pressure holding sampler proposed adopts the storage cold source method as the most refrigeration system. In practical application, the drill body has a large volume, the heat preservation of th...

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Problems solved by technology

The patent publication number is CN101706379A. The ice valve heat preservation and pressure holding sampler proposed adopts the storage cold source method as the most refrigeration system. In practical application, the drill body has a large volume, the heat preservation of the fluid channel is not easy to achieve, and the process of lifting the drill cannot be refrigerated. It is easy to cause problems such as ice valve melting and sealing failure

The patent with the publication number CN102494428A discloses a hydraulic submersible refrigerator used to replace energy storage. Due to the sensitivity of the refrigerant to water, higher sealing requirements are put forward for the hydraulic submersible refrigerator, and its moving parts are easy to Refrigeration failure due to wear and other problems, and there is also the problem that the ice valve cannot melt and seal failure due to continuous refrigeration during the drilling process

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