Low resistance, fluid replenishing, reference cell and method fo

Details Low resistance, fluid replenishing, reference cell and method fo Low resistance, fluid replenishing, reference cell and method fo

1980-08-11

1983-11-08

Strecker, Gerard R.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

Using electrode arrays, circuits, structure, or supports

324 711, 324348, 324450, G01V 315, G01N 2730, G01R 3100

Patent

active

044145110

ABSTRACT:
A reference cell for conducting closely spaced buried structure-to-soil electrical surveys uses a soil contact cell adapted to be mounted on the lower end of a pole or cane to be held by the surveyor walking over the right-of-way of the buried structure such as an underground pipeline. The cell includes a fluid chamber on the lower end of the pole or cane and includes on the lower end of the chamber a ground contact pad. A spring loaded bottom wall or boot closes the chamber and is operative to reduce the volume of the chamber when the lower end of the chamber is forced by the pole into contact with the ground above the buried structure. The reduction in volume of the chamber forces fluid through the contact pad to the ground to insure good electrical contact. Fluid in the chamber may be continuously replenished by a make-up supply carried by the surveyor which is drawn from the supply by return of the boot to its unstressed state. The ground contact pad may be porous and/or provided with a fluid flow opening which is opened when the pad is forced against the ground.

REFERENCES:
patent: 1163469 (1915-12-01), Schlumberger
patent: 2400678 (1946-05-01), Archie
patent: 2974276 (1961-03-01), Davis
patent: 3735249 (1973-05-01), Stoll
patent: 4088945 (1978-05-01), Howell et al.
patent: 4151458 (1979-04-01), Seager

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