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AssigneeSchlumberger Technology Corporation
InventorsJagdish Shah, Robert Schroeder, Philip Dryden, Rogerio Ramos, Raghu Madhavan
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A multiple mode pre-loadable fiber optic pressure and temperature sensor includes a generally cylindrical structure having at least one compression element, a fiber optic having a Bragg grating in contact with one side of the compression element, a diaphragm in contact with the other side of the compression element, and a fluid port in fluid communication with the diaphragm. According to preferred aspects of the, a groove is provided in at least one compression element for receiving the fiber optic. The sensor is pre-loaded by straining the diaphragm over the adjacent compression element when the cover is attached. The compression element in contact with the diaphragm preferably has a contoured surface contacting the diaphragm and the diaphragm is stretched to match that contour. By varying the contour of the compression element and the thickness of the diaphragm, the dynamic range of the sensor can be changed. The preferred diaphragm has a variable thickness and is made as an integral part of the structure. The sensor can be operated in normal, reverse, or differential mode.
A pressure sensor, comprising:
A pressure sensor, comprising:
A pressure sensor, comprising:
A pressure sensor, comprising:
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Dependencies are inferred from the claim text.