A gas-propelled underground fluid layered sampling device

A technology for underground fluids and sampling devices, applied in wellbore/well components, earth-moving drilling, etc., can solve the problem that the change of particle concentration of formation fluid cannot be reflected in real time, the air cannot be removed from the wellbore with structural design, and the formation fluid cannot be continuously entered, etc. problems, to achieve good application prospects and commercial value, simple and convenient installation and sampling operations, ingenious and novel structure
CN103967486BActive Publication Date: 2017-05-17INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
Publication Date
2017-05-17

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Abstract

The invention discloses a gas pushing type underground fluid stratified sampling device. The end port of a simple packer system is inserted into a pipe of a shaft system to perform embedding and fixedly riveted with the pipe through screws to form an integral cylindrical structure. The integral cylindrical structure is buried in the stratum through drilled holes, and a guide pipe in the integral cylindrical structure penetrates through small holes preserved in simple packers to be connected with a U-shaped pipe underground fluid sample feeding system. The guide pipe penetrates through the small hole preserved in a first simple packer to be connected with a gas phase filter and a gas phase check valve of a soil gas sampling system and penetrates through the first simple packer to be connected with a needle valve on the ground and a fluid sampling container. A gas pushing type ground fluid sampling system penetrates through the small hole preserved in the first simple packer to be connected with the U-shaped underground fluid sample feeding system. The gas pushing type underground fluid stratified sampling device is ingenious and novel in structure, low in cost, excellent in durability, strong in field adaptability, wide in application fields, strong in project demands and good in application prospect and commercial value.
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Description

technical field

[0001] The invention relates to the field of subsurface fluid sampling in shallow formations, and more particularly relates to a device for sampling groundwater and soil gas layers in shallow wells based on the principle of gas push. Background technique

[0002] Subsurface fluid is an important factor related to the evolution of the earth and the survival of surface organisms. Subsurface fluid sampling can continuously provide a large amount of physical, chemical and microbial information about the formation through isotope tracking, formation residual gas analysis, chemical composition testing, microbial community characteristics and other analysis methods, which is of great guiding significance for engineering development and environmental safety assessment One of the means of monitoring.

[0003] To analyze subsurface fluids, a subsurface fluid sample must first be obtained. According to the classification of working principles, various subsurface fluid...

Claims

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