Process and apparatus for obtaining samples of liquid and gas fr

Details Process and apparatus for obtaining samples of liquid and gas fr Process and apparatus for obtaining samples of liquid and gas fr

1996-05-20

1999-03-30

Raevis, Robert

Measuring and testing

Sampler, sample handling, etc.

Capture device

E21B 4300

Patent

active

058892176

ABSTRACT:
An apparatus and process for obtaining samples of liquid and gas from subsurface soil is provided having filter zone adjacent an external expander ring. The expander ring creates a void within the soil substrate which encourages the accumulation of soil-borne fluids. The fluids migrate along a pressure gradient through a plurality of filters before entering a first chamber. A one-way valve regulates the flow of fluid into a second chamber in further communication with a collection tube through which samples are collected at the surface. A second one-way valve having a reverse flow provides additional communication between the chambers for the pressurized cleaning and back-flushing of the apparatus.

REFERENCES:
patent: 2210546 (1940-08-01), Hassler
patent: 2214551 (1940-09-01), Edwards
patent: 3722589 (1973-03-01), Smith et al.
patent: 3930754 (1976-01-01), Mogg et al.
patent: 4160622 (1979-07-01), Colburn
patent: 4745801 (1988-05-01), Luzier
patent: 4759227 (1988-07-01), Timmons
patent: 4807707 (1989-02-01), Handley et al.
patent: 5010776 (1991-04-01), Lucero et al.
patent: 5035149 (1991-07-01), Wierenga
Harrison et al., "A Probe Method for Soil Water Sampling and Subsurface Measurements" Water Resources Research, vol. 17, No. 6, pp. 1731-1736, Dec. 1981.

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