Down-hole video instrument

Abstract

The invention relates to a down-hole video instrument, in particular to a photoelectric composite cable instrument for oil-and-gas well logging. The down-hole video instrument is mainly used for detecting whether a pipe is deformed and corroded or bubbling due to casing damage, and finishing fallen things, especially used in worse environments of the sea or oil-and-gas wells. The down-hole video instrument includes a pressure bearing outer pipe and a hollow lower joint, the lower joint is connected to one end of the pressure bearing outer pipe, and the end connected the pressure bearing outer pipe and the lower joint is the tail end of the pressure bearing outer pipe. According to the down-hole video instrument, the structure is simple, the pressure bearing outer pipe bearings high pressure of working environments, external high pressure transmitted to an image sensor in an axial direction through a lens is alleviated, the image sensor is a heating source, heat is transferred to an endothermic body by a regulating casing, and image sensor failure due to excessive temperature is avoided.

Description

technical field [0001] The invention relates to a downhole video instrument, in particular to a photoelectric composite cable instrument for oil and gas well logging, mainly used to detect whether there is deformation, corrosion, and bubbling of the pipeline due to casing damage. And falling object salvage; especially in the harsh environment of offshore or oil and gas wells. Background technique [0002] In oil well logging operations, multi-arm caliper measurement is usually used to evaluate the degree of casing deformation and corrosion. During the logging process, the remote sub-section transmits the data to the ground system, and interpretation software is needed to restore the 3D rendering, and the instrument is Consists of a limited number of measuring arms, which results in a loss of lateral resolution. The downhole video can not only observe the actual well conditions downhole in real time through the ground system display software, but also evaluate the degree of ...

AI Technical Summary

Problems solved by technology

[0004] At present, the temperature resistance index of common image sensors on the market is generally below 70°C, which cannot meet the high temperature and high pressure requirements of oil wells in many cases.

[0005] The image sensor of the existing video equipment is connected to the external signal receiving equipment through the cable. Due to the limitation of the transmission rate, most of the equipment has an internal storage space. The large storage space solves the problem that the large amount of data cannot be transmitted in real time; While storing high-definition images, only low-resolution images can be transmitted online, and real-time transmission of high-definition images with large amounts of data cannot be realized

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