Temperature compensation structure of optical fiber detector for high-temperature oil well

Abstract

The invention discloses a temperature compensation structure of an optical fiber detector for a high-temperature oil well, comprising a supporting barrel (10), two end covers (20) with holes, a first membrane (31), a second membrane (32) and springs (30), wherein the supporting barrel (10) is used for protecting the inner structure of the optical fiber detector; the two end covers (20) with holes are installed at both ends of the supporting barrel and used for connecting an optical cable; the first membrane (31) is installed between one side of the supporting barrel (10) and one end cover (20) and used for connecting and fixing an optical fiber; the second membrane (32) is installed between the other side of the supporting barrel (10) and the other end cover (20) and used for connecting and fixing the optical fiber; and the springs (30) are installed in the supporting barrel (10) and at the inner side of the second membrane (32) and used for supporting the second membrane (32) and controlling the stress in the optical fiber. By adopting the structures of the springs and the membranes, the temperature compensation structure realizes temperature compensation and solves the problem of temperature compensation of an underground optical fiber detector.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensors used in downhole oil exploration, in particular to a novel temperature compensation structure of optical fiber detectors used in high temperature oil wells. Background technique [0002] Compared with the corresponding conventional sensors, fiber optic sensors have obvious advantages in terms of sensitivity, dynamic range, and reliability. They have played an increasingly important role in the fields of civil and national defense, and have been listed as key sensor technologies for development by many countries. [0003] Optical fiber detector is an instrument that uses optical fiber to be sensitive to external changes, and its output optical parameters change with seismic wave signals, and detect seismic wave signals by detecting changes in optical parameters. Compared with traditional piezoelectric sensors, it has the following main advantages: wide frequency band, high sound press...

AI Technical Summary

Problems solved by technology

[0008] In view of this, the main purpose of the present invention is to provide a fiber optic detector temperature compensation structure for high temperature oil wells, to solve the problem of downhole fiber optic detector temperature compensation

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