Chain bar type underground fluid sampling device

Abstract

The invention discloses a chain bar type underground fluid sampling device comprising a plurality of sampling devices, wherein each sampling device comprises a sampling shaft, a top plug and a bottomplug are respectively arranged at the top and bottom of the sampling shaft, an upper packer and a lower packer are respectively arranged in a sleeving manner and fixed at the upper part and the lowerpart of the sampling shaft, an upper packer top sling and an upper packer bottom sling are respectively arranged at the top and bottom of the upper packer, a lower packer top sling and a lower packerbottom sling are respectively arranged at the top and bottom of the lower packer, and the lower packer bottom sling is connected with the adjacent upper packer top sling below by a steel wire. The device can prevent fluid communication of different layers during underground fluid sampling, can rely on a weight device to reach the specified sampling level without the support of external force, atthe same time, is flexible in operation by using the steel wire as a flexible connecting rod, and can well expand the application depth thereof.

Description

technical field [0001] The invention relates to underground fluid sampling technology, in particular to a chain rod type underground fluid sampling device. Background technique [0002] Underground fluid sampler in underground fluid environment monitoring and CO 2 Leakage safety early warning assessment plays an important role. According to the needs of actual underground fluid level and underground fluid environment monitoring, different types of underground fluid sampling technologies and sampling equipment suitable for different monitoring depths have been developed. According to the difference in sampling principle and structural design, it can be roughly divided into three categories: cylinder sampler, pump sampler, and gas-driven sampler. Among them, the gas-driven sampler has become the current advanced underground fluid sampling technology due to its high sampling efficiency, large sampling capacity, and continuous multiple sampling. The latest technical representat...

AI Technical Summary

Problems solved by technology

The current U-shaped tube underground fluid stratified sampling technology does not adopt any interlayer isolation measures during stratified sampling, which may easily lead to fluid collusion between different layers and affect the accuracy of fluid sampling; and the conventional U-shaped tube underground The fluid stratified sampling device uses PVC pipes as a rigid connection, which is only suitable for sampling fluid layers within 20 meters underground. As the sampling depth increases, the operation difficulty of this type of connection increases, which greatly limits the expansion of sampling depth.

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