Boring or penetrating the earth – Boring without earth removal – Combined with earth removal
Patent
1995-12-29
1997-10-07
Neuder, William P.
Boring or penetrating the earth
Boring without earth removal
Combined with earth removal
175 58, E21B 4902
Patent
active
056737629
ABSTRACT:
A method for obtaining saturated soil samples includes conventional drilling equipment with a central hollow which receives a conventional soil sample collection device. An elongate sleeve with a closed end is nested about the sample collection device to prevent soil from entering the sample device before it is in position adjacent the soil to be sampled. Once in position, force is applied to the sample collection device to drive it into the soil. As the sample collection device is driven into the soil, it penetrates through the sleeve. The sample collection device is then withdrawn, leaving the sleeve in the hole formed by the collection device to help prevent collapse of the walls. The sleeve also helps to minimize any negative pressures which might develop as the sample collection device is withdrawn and which can result in soil plugging the central hollow of the auger.
REFERENCES:
patent: 3047081 (1962-07-01), Pitcher
patent: 3075588 (1963-01-01), Mitchell
patent: 4518050 (1985-05-01), Sollie et al.
patent: 5186263 (1993-02-01), Kejr et al.
Hurricane Dual Sampling System--Universal Environmental Engineering--Brochure date unknown.
CBC (Christensen Boyles Corporation--Auger & Soil Tools--catalog date unknown.
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