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US 2015/0020598 A1Published application
Apparatus and Method of Distributed Pressure Sensing
AssigneeHalliburton Energy Services, Inc.
InventorYunmiao Wang
Life of this patent
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Abstract
Various embodiments include apparatus and methods to measure pressure using an optical fiber. The optical fiber can be structured with fiber Bragg gratings arranged along the optical fiber. Optical signals can be transmitted through the optical fiber, where the optical signals have a wavelength of a slow-light peak of a respective one of the fiber Bragg gratings. Signals resulting from the optical signals transmitted through the optical fiber can be detected and a value of pressure from the detected signals can be determined.
Claims20
A method comprising:
- transmitting optical signals through an optical fiber having a plurality of fiber Bragg gratings distributed along the optical fiber, each fiber Bragg grating having a Bragg wavelength different from the other fiber Bragg gratings, each of the optical signals having an operating wavelength different from operating wavelengths of the other optical signals, each operating wavelength of the optical signals being at a wavelength of a slow-light peak of a respective one of the fiber Bragg gratings;
- detecting signals resulting from the optical signals transmitted through the optical fiber;
- and
- determining a value of pressure from the detected signals, the determined value corresponding to pressure at a location of one of the fiber Bragg gratings.
1 more element
A system comprising:
- an optical fiber having a plurality of fiber Bragg gratings distributed along the optical fiber, each fiber Bragg grating having a Bragg wavelength different from the other fiber Bragg gratings;
- an optical source operatively coupled to the optical fiber and arranged to operatively transmit optical signals through the optical fiber, each of the optical signals having an operating wavelength different from operating wavelengths of the other optical signals, each operating wavelength of the optical signals being at a wavelength of a slow-light peak of a respective one of the fiber Bragg gratings;
- a detector unit operatively coupled to the optical fiber to detect signals resulting from the optical signals transmitted through the optical fiber;
- a processing unit operatively coupled to the detector unit and arranged to determine a value of pressure from the detected signals, the determined value corresponding to pressure at a location of one of the fiber Bragg gratings.
1 more element
Dependencies are inferred from the claim text.