Sampling apparatus and method

Details Sampling apparatus and method Sampling apparatus and method

1987-10-26

1989-02-28

Dang, Hoang C.

Boring or penetrating the earth

Boring without earth removal

Combined with earth removal

7386474, 175 21, 175 59, E21B 4908

Patent

active

048077070

ABSTRACT:
A sampling system and method for obtaining subsurface samples of soil gas and ground water includes a sampling probe which is pushed into the ground with a plurality of thrust rods. The sampling probe has a pointed head telescoped within a sampling housing during insertion. An umbilical tube communicating with the housing is utilized to introduce inert gas into the housing, extending the probe from the housing. Reduction of the gas pressure permits water or gas to flow through a filter and check valve into the housing by piezometric pressure. A computer monitoring system permits control of gas pressure to collect a desired amount of sample and to store data for later analysis.

REFERENCES:
patent: 2141261 (1938-12-01), Clark
patent: 3943750 (1976-03-01), McLaughlin
patent: 4261203 (1981-04-01), Snyder
patent: 4310057 (1982-01-01), Brame
patent: 4335622 (1982-06-01), Bartz
patent: 4669554 (1987-06-01), Cordry
"HydroPunch" catalog sheet, Version 90-1187,1987.
"Groundwater Sampling Without Wells", Kent E. Cordry et al., Sixth National Symposium and Exposition of Aquifer Restoration and Groundwater Monitoring-Columbus, Ohio May 20, 1986.

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