Probe for radiologically determining the density of rock in a dr

Details Probe for radiologically determining the density of rock in a dr Probe for radiologically determining the density of rock in a dr

1996-06-10

1998-04-07

Dougherty, Elizabeth L.

Measuring and testing

Borehole or drilling

Formation logging

7315214, E21B 4900

Patent

active

057366365

ABSTRACT:
A probe for determining the density of the material forming the wall of a wellhole provided with a selectively actuable source of gamma radiation pulses, including a pulse electron accelerator having an anode and cathode in axial alignment with a control electrode therebetween, the anode being connected to the output of the secondary coil of a Tesla transformer the primary coil of which is connected to the output of a capacitive high voltage charge unit. Emitted and scattered radiation are measured by first and second detectors the outputs of which are fed to a divider to derive a quotient of the outputs as a value representative of the density.

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patent: 4387302 (1983-06-01), Givens
patent: 4845359 (1989-07-01), Wraight
patent: 5086224 (1992-02-01), Roscoe et al.
patent: 5122662 (1992-06-01), Chen et al.
patent: 5390153 (1995-02-01), Scherbatskoy

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