Groundwater sampler

Details Groundwater sampler Groundwater sampler

1994-05-04

1996-01-23

Dang, Hoang C.

Wells

Receptacles

With valved or closed top

7386465, 1663324, 175 20, E21B 4908

Patent

active

054858810

ABSTRACT:
For extracting samples of groundwater from a borehole. A down-hole fixture has a check-valve positioned at the foot of the borehole. A sampler is lowered down into the borehole. Pushing down on the sampler causes a stem on the sampler to unseat the check-valve, communicating groundwater with the sampler. A plastic tube running from the sampler to the surface transmits the push from the surface, required to operate the down-hole valve.

REFERENCES:
patent: 2384090 (1945-09-01), Hartsell
patent: 2751020 (1956-06-01), Johnston
patent: 3163225 (1964-12-01), Perkins
patent: 4438654 (1984-03-01), Torstensson
patent: 4612984 (1986-09-01), Crawford
patent: 5343968 (1994-09-01), Glowka

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