Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent
1989-03-03
1990-04-10
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
175 40, G01V 330
Patent
active
049164007
ABSTRACT:
A method is proposed for determining the distance from an investigating device to the surface of a medium capable of supporting wave propagation. According to the method, a propagatory wave is generated at a given location along the surface of said medium and spaced laterally therefrom. The propagatory wave is caused to enter the medium and to propagate in the medium. The phase of the propagating signal is detected at a pair of locations respectively spaced longitudinally along the surface of the medium by different distances from the transmitting location. An indication of the lateral spacing between the detecting means and the medium is determined in response to the phase information detected at the pair of locations.
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Best David L.
Clark Brian
Borst Stephen L.
Eisenzopf Reinhard J.
Ryberg John J.
Schlumberger Technology Corporation
Snow Walter E.
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