Calibration and quality control system for neutron logging instr

Details Calibration and quality control system for neutron logging instr Calibration and quality control system for neutron logging instr

1988-07-25

1990-07-31

Howell, Janice A.

Radiant energy

Calibration or standardization methods

250269, 2505031, G01V 510

Patent

active

049452339

ABSTRACT:
A calibration and response quality verification system for neutron logging instruments includes a chamber filled with a neutron moderating and absorbing solution and sufficiently sized to provide an effectively infinite environment with longitudinal homogenity. A neutron tool is disposed within a calibration tube traversing the chamber. A plurality of rod members are selectively inserted into the annular space between the instrument and tube to provide a plurality of selectable and precisely repeatable environments to represent an extensive range of formation porosities.

REFERENCES:
patent: 3215837 (1965-11-01), Hall, Jr.
patent: 4378498 (1983-03-01), Givens

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