Device and technology for plating surface of glass capillary tube with carbon film

Abstract

The invention provides a device and a technology for plating the surface of a glass capillary tube with a carbon film. The device comprises a carbon dioxide laser printer fixed on a base and a prism matched with the carbon dioxide laser printer and further comprises a hollow casing, wherein a light transmitting window corresponding to the prism is formed in one side surface of the casing, a first gas hole and a second gas hole are formed in the other side surface of the casing, the first gas hole is communicated with a vacuum pump, and the second gas hole is communicated with an acetylene and nitrogen gas tank; an optical fiber clamp is arranged on the casing, and the inner part of the casing is hermetically sealed with the outer part of the casing. The carbon film plating device is suitable for carrying out carbon film deposition on the surface of the glass capillary tube in a chemical vapor deposition method. The glass capillary tube needing to plated with the film is inserted in a collimated glass tube, a tail fiber on the tail is tightened and sealed through a rubber pad, the optical fiber clamp, an optical fiber fixing clamp and a nut, and two turriform joint devices are respectively connected with the vacuum pump and the gas tank. The glass capillary tube coated with the carbon film can effectively prevent the corrosion of hydrogen ions in an external environment. The service life of the glass capillary tube is prolonged.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensors, and relates to a method for preventing hydrogen damage of optical fiber sensors, in particular to a film coating device and process on the surface of a capillary glass tube. Background technique [0002] In the process of oilfield development, it is necessary to monitor downhole temperature, pressure and other parameters in real time to understand the physical state of the downhole to optimize the oil recovery plan and improve oil recovery efficiency. Due to the harsh environment downhole, traditional electronic sensors cannot work stably for a long time downhole. Optical fiber Sensors are more and more widely used due to their strong anti-interference ability, corrosion resistance, and good reliability. [0003] In 1983, N. Uchida introduced in the literature the significant change in fiber attenuation of a fiber optic cable that had been laid for more than two years, making the lo...

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Problems solved by technology

[0002] In the process of oilfield development, it is necessary to monitor downhole temperature, pressure and other parameters in real time to understand the physical state of the downhole to optimize the oil recovery plan and improve oil recovery efficiency. Due to the harsh environment downhole, traditional electronic sensors cannot work stably for a long time downhole. Optical fiber Sensors are more and more widely used due to their strong anti-interference ability, corrosion resistance, and good reliability.

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