In-situ pore water sampling column and water sampling method thereof

Abstract

The invention relates to an in-situ pore water sampling column and a water sampling method thereof. The in-situ pore water sampling column comprises a drilling head and at least two sampler units; the sampler units are connected through a hoop; each sampler unit comprises an electromagnetic valve mounting barrel, a sampling tube, a wastewater cabin, a sample cabin, an electromagnetic valve, a composite filter layer, a balance piston, a control cable and a guide pipe. The water sampling method includes the steps of preprocessing of the sampler units, drilling, deep-water sampling and lifting. The in-situ pore water sampling column and the water sampling method thereof have the advantages that deep bed water can be effectively sampled under high purity, the ability of equipment to adapt to and resist marine pressure changes is improved, operational stability and reliability of equipment is improved, operating is simple and regular, efficiency of deep bed water sampling is effectively improved, and operational skill level of operators can be increased.

Description

technical field [0001] The invention relates to an in-situ pore water sampling water column and a water sample collection method, belonging to the technical field of marine exploration equipment. Background technique [0002] At present, when conducting deep-sea exploration and geological research, it is often necessary to collect the in-situ pore water contained in the deep seabed sea mud. The depth of the seabed is generally not less than 4,000 meters. The bottom of the deep ocean cannot be directly collected by divers directly underwater, and it must be collected with the help of in-situ pore water sampling equipment. The Bou-Rouch sampler is currently the most widely used sampling device when the standpipe sampling method is adopted. However, when collecting a lot of pore water at the bottom of the ocean, it is very easy to cause the Bou-Rouch sampler to fail due to excessive ocean pressure, and even cause damage to the structure of the Bou-Rouch sampler in severe cases...

AI Technical Summary

Problems solved by technology

[0002] At present, when conducting deep-sea exploration and geological research, it is often necessary to collect the in-situ pore water contained in the deep seabed sea mud. The depth of the seabed is generally not less than 4,000 meters. The bottom of the deep ocean cannot be directly collected by divers directly underwater, and it must be collected with the help of in-situ pore water sampling equipment. The Bou-Rouch sampler is currently the most widely used sampling device when the standpipe sampling method is adopted. However, when collecting a lot of pore water at the bottom of the ocean, it is very easy to cause the Bou-Rouch sampler to fail due to excessive ocean pressure, and even cause damage to the structure of the Bou-Rouch sampler in severe cases. At the same time, when the Bou-Rouch sampler is sampling, the degree of automation is relatively low, so the Bou-Rouch sampler cannot effectively meet the needs of sampling pore water in the deep sea environment below 4000 meters. , there is an urgent need to develop a professional deep-sea environment in-situ pore water sampling equipment to meet the needs of practical use

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