Boring or penetrating the earth – Processes – Sampling of earth formations
Patent
1993-10-01
1995-09-19
Dang, Hoang C.
Boring or penetrating the earth
Processes
Sampling of earth formations
175236, 175246, E21B 4902
Patent
active
054509130
ABSTRACT:
The invention provides an apparatus and method for taking samples of soil and other materials in an efficient manner as well as for maintaining a high level of integrity of the samples. Using a wire line and a release and retrieve assembly, the sampling tube is lowered into an auger that has been bored into the ground to the desired depth. Once lowered to the bottom of the auger, the sampling tube is locked into place and the release and retrieve assembly is removed from the auger. A portion of the sampling tube extends beyond the drill bit. As the auger is drilled farther into the ground, the sampling tube is filled with soil or whatever material is present, without such soil or other material having been disturbed by the drill bit. This provides integrity of the sample. After the sample has been collected in the sampling tube, the release and retrieve assembly is reinserted into the auger and reattached to the sampling tube, which is then unlocked and retrieved out of the auger.
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Mefferd Floyd R.
Mefferd Larry C.
Dang Hoang C.
Gold Star Manufacturing, Inc.
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