Fiber optic well logging means and method
A well logging system provides at least one output corresponding to a condition sensed in a borehole traversing an earth formation. The well logging system includes a logging instrument which includes a sensor sensing the condition and providing electrical pulses corresponding in number and peak amplitude to the sensed condition. A converting circuit connected to the sensors converts each electrical pulse into a light pulse whose intensity corresponds to the peak amplitude. A well logging cable connected to the logging instrument includes a light conductor. The logging instrument further includes a circuit for applying the light pulses to one end of the light conductor. Surface apparatus includes a converter connected to the other end of the light conductor for converting each light pulse into a corresponding electrical pulse having a peak amplitude representative of the intensity of the light pulse. Circuitry connected to the electrical converter processes the electrical pulses provided by the light to electrical converter to provide the output corresponding to the sensed condition. 9 claims.
- Assignee:
- Texaco Inc.
- Patent Number(s):
- US 4162400
- OSTI ID:
- 5801301
- Country of Publication:
- United States
- Language:
- English
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