Multi-channel source assembly for downhole spectroscopy
AssigneePrecision Energy Services, Inc.
InventorsJess V. Ford, Thomas Blankinship, Bryan W. Kasperski, Margaret C. Waid, Sean M. Christian
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Abstract
A multi-channel source assembly for downhole spectroscopy has individual sources that generate optical signals across a spectral range of wavelengths. A combining assembly optically combines the generated signals into a combined signal and a routing assembly that splits the combined signal into a reference channel and a measurement channel. Control circuitry electrically coupled to the sources modulates each of the sources at unique or independent frequencies during operation.
Claims35
An assembly for downhole spectroscopy, comprising:
- a plurality of individual light emitting diode (LED) sources deployed downhole in the source assembly and generating optical signals across a spectral range of wavelengths;
- a routing assembly deployed downhole in the source assembly, the routing assembly spectrally filtering the generated signals of the LED sources, concurrently combining the spectrally filtered signals through free space into a combined signal, and concurrently routing the combined signal through free space into a reference channel and one or more measurement channels;
- and
- control circuitry deployed downhole in the source assembly, the control circuitry electrically coupled to the LED sources and operable to electronically modulate each of the LED sources at an independent frequency.
A downhole fluid analysis method, comprising:
- deploying a fluid analysis device downhole;
- obtaining a fluid sample downhole;
- generating a plurality of optical signals across a spectrum of wavelengths by electronically modulating each of a plurality of light emitting diode (LED) sources at an independent frequency;
- spectrally filtering the generated signals from one or more of the LED sources;
- concurrently combining the spectrally filtered signals through free space into a combined signal;
- and
- concurrently routing the combined signal through free space into one or more measurement channels for interacting with the fluid sample and into a reference channel for dynamically scaling the measurement channel.
Dependencies are inferred from the claim text.