Gain stabilization for radioactivity well logging apparatus
Patent
·
OSTI ID:6608219
An improved gain stabilization system for radioactivity well logging apparatus of the type having a scintillation crystal optically coupled to a photomultiplier, a light emitting diode driven by a pulser and furnishing scintillations to the photomultiplier located in a sonde resulting in a stabilization pulse which is provided to electronic circuitry at the surface for stabilization purposes. The improvement includes a temperature sensor located in the sonde and circuitry for maintaining the intensity of the light provided by the light emitting diode in response to the operation of the temperature sensor.
- Assignee:
- Texaco Inc
- Patent Number(s):
- US 4346590
- OSTI ID:
- 6608219
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
AMPLIFICATION
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
GAIN
LIGHT EMITTING DIODES
MEASURING INSTRUMENTS
OIL WELLS
OSCILLATORS
PHOTOMULTIPLIERS
PHOTOTUBES
PROBES
RADIATION DETECTORS
RADIOACTIVITY LOGGING
RESISTORS
SCINTILLATION COUNTERS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
STABILIZATION
THERMISTORS
WELL LOGGING
WELLS
020200* -- Petroleum-- Reserves
Geology
& Exploration
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
AMPLIFICATION
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
GAIN
LIGHT EMITTING DIODES
MEASURING INSTRUMENTS
OIL WELLS
OSCILLATORS
PHOTOMULTIPLIERS
PHOTOTUBES
PROBES
RADIATION DETECTORS
RADIOACTIVITY LOGGING
RESISTORS
SCINTILLATION COUNTERS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
STABILIZATION
THERMISTORS
WELL LOGGING
WELLS