Underground video detection device suitable for high-temperature geothermal well and control method of underground video detection device

Abstract

The invention relates to the technical field of petroleum engineering equipment, in particular to an underground video detection device suitable for a high-temperature geothermal well and a control method of the underground video detection device. The underground video detection device comprises an image acquisition module and a communication module which is in communication and data transmission with the outside, wherein a shell is arranged outside the image acquisition module and the communication module; a cooling mechanism is arranged between the shell and the image acquisition module, a vacuum cavity is arranged between the cooling mechanism and the shell, and the communication module is in signal connection with the image acquisition module and the cooling mechanism. When the device is in use, the pressure inside the container detected by the first pressure sensor is compared with the pressure outside the shell detected by the second pressure sensor to control the opening or closing of the pressure release valve, so the pressure difference between the inside and the outside of the container is balanced, the risk of explosion caused by overlarge pressure difference between the inside of the container and the outside of the shell is prevented, and the image acquisition module is better cooled.

Description

technical field [0001] The invention relates to the technical field of petroleum engineering equipment, in particular to a downhole video detection device suitable for high temperature geothermal wells and a control method thereof. Background technique [0002] In all stages of geothermal well production, it is necessary to carry out a certain downhole video inspection. However, the existing downhole video inspection tools for oil and water wells cannot be used in the environment of high temperature geothermal wells, because small solid-state video sensors cannot work in high temperature geothermal environments, and the quality of the captured images will be degraded under high temperature conditions. Therefore, in order to detect the downhole video of high temperature geothermal wells, the geothermal wells must be cooled first. However, pumping cold water to cool geothermal wells is very expensive, which can damage the well, cause large changes in thermal expansion, damage...

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Problems solved by technology

[0003] The technical problem to be solved by the invention is: in order to solve the problem of cooling the geothermal well by pumping cold water, it is very expensive, which will cause damage to the well, resulting in a large change in thermal expansion, damage to the well wall or damage to the hot dry rock supporting the well. Therefore, Downhole detection of high-temperature geothermal wells has always been a difficult problem. Now, a downhole video detection device and its control method suitable for high-temperature geothermal wells are provided.

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