Sampling device for groundwater sampling and associated sampling method

FR3134400B1Active Publication Date: 2025-07-18AGENCE NATIONALE POUR LA GESTION DES DECHETS RADIOACTIFS (ANDRA)
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Patent Information

Application Number
FR2022003210
Authority / Receiving Office
FR · FR
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-04-07
Publication Date
2025-07-18
Estimated Expiration
2042-04-07

AI Technical Summary

Technical Problem

Existing groundwater sampling methods, such as passive and active sampling devices, face limitations in representing the water column, are prone to sample disturbance due to physicochemical exchanges, cavitation, and depth restrictions, and fail to renew the water column effectively.

Method used

A sampling device comprising a sampling rod with a tubular intermediate column and a valve at the lower end, allowing groundwater to be pumped through the column and then blocked in the rod without passing through pumps, ensuring representative sampling.

Benefits of technology

The device provides undisturbed, representative groundwater samples by preventing sample alteration and allowing water renewal, while being simple and economical for routine use.

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Abstract

The invention relates to a sampling device (10) for collecting groundwater, the sampling device (10) being characterized in that it comprises a sampling rod (11) suspended by suspension and extraction means (100) connected to the surface (S) and comprising a tubular intermediate column (12) extending along a longitudinal reference axis (A) between an upper end (13) and a lower end (14), and in that: the upper end (13) comprises a connection interface (23) connected to a circuit (15) connected to one or more pump(s) (16) for sucking up groundwater from the lower end (14), passing through the intermediate column (12) and discharging the sucked water to the surface (S);and in that the lower end (14) comprises a valve (141) configured to open and close a flow channel (142) so as to open and close, respectively, the lower end (14) of the sampling probe (11).;
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