Resonant sensor with optical excitation and monitoring device using this sensor
AssigneeSchlumberger Technology Corporation
InventorsSandrine Lelong-Feneyrou, Olivier Nicolet, Gilles Amendola, Hua Chen, Olivier Francais, Frédéric Marty, Olivier Robert, Olivier Gigan
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Abstract
Resonant sensor with optical excitation and monitoring device using this sensor. This sensor comprises a doped silicon resonator (4) to absorb radiation (Re) with wavelength longer than 1100 nm and may be used for example to monitor the pressure in an oil well.
Claims13
An optical excitation resonant sensor, comprising a resonant element made of silicon and capable of absorbing incident radiation (Re), whereby the resonant element is made of silicon doped with P-type doping at a level of least 5×1017 atoms per cm3, such that the resonant element is capable of absorbing incident radiation with a wavelength greater than 1100 nm.
A monitoring device capable of measuring pressure in a well, comprising a network of sensors distributed along at least part of the well, the sensors being connected to surface control and processing means for the signals supplied by the sensors, each sensor comprising a resonant element made of silicon and capable of absorbing incident radiation (Re), whereby the resonant element is made of silicon doped with P-type doping at a level of least 5×1017 atoms per cm3, such that the resonant element is capable of absorbing incident radiation with a wavelength greater than 1100 nm.
Dependencies are inferred from the claim text.