Boring or penetrating the earth – Boring without earth removal – Fluid passage to exterior of drive point
Patent
1990-03-15
1991-09-10
Britts, Ramon S.
Boring or penetrating the earth
Boring without earth removal
Fluid passage to exterior of drive point
175 22, 175 59, 166264, 73155, E21B 726
Patent
active
050465686
ABSTRACT:
A device for retrieving a groundwater sample is provided. The device includes an elonagated hollow housing, a closure assembly mounted on the top end of the housing, and a drive cone removably mounted on the bottom end of the housing. The drive cone is adapted to penetrate the ground and is configured to be restrained by the ground once in place below the ground surface, so that frictional engagement between the drive cone and housing is overcome when the closure assembly and housing are withdrawn toward the surface. Such withdrawal of the closure assembly and housing leaves the drive cone in place, separated from the housing. A collection and containment unit is mounted within the hollow housing and closure assembly for collecting a groundwater sample after the drive cone has been separated from the housing.
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Thompson et al, "Soil Gas Contaminant Investigations: A Dynamic Approach", Groundwater Monitoring Review (GWMR), Summer 1987, pp. 88-93.
Britts Ramon S.
Schoeppel Roger J.
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