DOWNHOLE SPECTRAL ANALYSIS TOOL
First Claim
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1. A downhole tool having a spectral analysis module comprising:
- a replica grating comprising a substantially inorganic substrate having grooves therein with a grating groove density configured for wavelengths from about 200 nm to about 4000 nm.
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Abstract
Spectral analysis system for downhole applications is provided utilizing an inorganic replica-type grating that is configured to operate as a diffractive element that provides broad spectral coverage in high temperature downhole environments.
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Citations
30 Claims
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1. A downhole tool having a spectral analysis module comprising:
a replica grating comprising a substantially inorganic substrate having grooves therein with a grating groove density configured for wavelengths from about 200 nm to about 4000 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A downhole fluid characterization apparatus comprising:
at least one optical spectrometer having a grating of substantially inorganic material, the grating being configured for at least five spectral wavelength channels having respective wavelengths greater than or equal to from about 200 nm. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A spectral analyzer for operation at high temperatures comprising:
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a substantially inorganic grating for light spectral dispersion in downhole high temperatures;
a light source;
the spectral analyzer being configured for operation in high temperatures greater than or equal to 80 degrees Celsius and a wavelength range from about 200 nm to about 4000 nm; and
the grating having a groove density that is less than or equal to 2/wavelengthmax, wherein wavelengthmax represents the maximum operational wavelength of the grating. - View Dependent Claims (29, 30)
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Specification