Downhole electronic instrument forced cooling insulation cabin

Abstract

The invention belongs to the field of petroleum engineering and specifically relates to an electronic device thermal insulation cabin which runs in an underground environment with high temperature and high pressure during the process of oil gas drilling and production. The underground electronic device forced cooling thermal insulation cabin comprises a vacuum bottle, an electronic device pipe nipple, a bottleneck thermal insulator, and a semiconductor refrigerating installation; the electronic device pipe nipple, the bottleneck thermal insulator, and the semiconductor refrigerating installation are installed inside the vacuum bottle in succession. According to the invention, the design of the refrigerating pipe nipple adopts a structure of inner heating-external cooling, and thermal insulation devices are installed at two ends of the refrigerating pipe nipple so that thermal transmission of direct contact between a hot end fixed mount with high temperature and a vacuum bottle liner is avoided, and therefore the work efficiency of the forced cooling thermal insulation cabin is increased so that a low temperature environment is effectively provided for the undergrounding electronic device; unidirectional heat pipes are installed between a heat absorption pipe nipple of the semiconductor refrigerating device and the refrigerating pipe nipple so that reverse thermal transmission is greatly reduced and the work efficiency of the forced cooling thermal insulation cabin is further increased.

Description

technical field [0001] The invention belongs to the field of petroleum engineering, and in particular relates to an electronic instrument insulation cabin that works for a long time in an underground high-temperature and high-pressure environment during oil and gas drilling and production. Background technique [0002] In the process of oil and gas drilling and production, the bottom hole temperature increases with the increase of depth, the geothermal gradient is generally 3°C / 100m, and the bottom hole temperature of a well with a depth of 3000m is generally above 100°C. Most of the oil and gas resources in the central and western regions of my country are buried in deep formations. As the depth of oil and gas exploration and development target layers increases, the temperature at the bottom of the well is also increasing. The temperature is between 140°C and 160°C. For areas with abnormal geothermal gradients, the bottom hole temperature can reach above 180°C when the well...

AI Technical Summary

Problems solved by technology

However, measurement while drilling / logging (MWD / LWD) tools often need to work continuously downhole for more than 100 hours. If you continue to use heat-absorbing agent thermos, a large dose of heat-absorbing agent is required, and the volume of the thermos bottle will increase accordingly. a lot of

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