High-temperature platinum resistor well logging device

Abstract

The invention relates to a high-temperature platinum resistor well logging device, which comprises a thermal insulation barrel, wherein the upper end of the thermal insulation barrel is covered by a compression nut; the lower end surface of the thermal insulation barrel is provided with a probe jacket which downwards extends; a temperature transmitter, a temperature sensor and a probe fixing sheet are arranged in the thermal insulation barrel, wherein the temperature transmitter, the temperature sensor and the probe fixing sheet are successively connected; a probe and the probe fixing sheet are fixedly connected; the probe extends into the probe jacket. The temperature transmitter is connected with a coaxial cable; the coaxial cable extends out from the compression nut; a cone guide head is screwed on the lower part of the thermal insulation barrel. The high-temperature platinum resistor well logging device has a wide temperature measurement range and can normally work at the temperature of 50DEC below zero-660DEG C. The measurement precision is high, the temperature measurement precision is less than or equal to 0.5%, and a measurement resolution is + / -0.5DEG C. The temperature sensor adopts a metal hard sealing structure, and therefore, risks brought by damage, such as the softening and the cracking of a rubber sealing ring, due to high temperature can be avoided. The thermal insulation barrel sheathes the temperature transmitter, and the temperature transmitter is guaranteed to carry out modulation and normal conversion on a temperature signal at a high temperature. Uninterrupted on-line measurement is adopted, and the temperature signal is subjected to functions, such as counting, collection, storage, analysis, printing and the like.

Description

technical field [0001] The invention relates to a temperature measuring device, in particular to a high-temperature platinum resistance logging device for testing the temperature of an oil-water well at a high temperature. Background technique [0002] High-temperature platinum resistance logging technology is a high-temperature testing technology for oil and water well temperature in high-temperature and high-pressure oil and gas wells, with the detection technology based on platinum resistance PT1000 sensor as the core. It is often used in the middle and late stages of petroleum exploration and development, and is a method for dynamic temperature testing of the oil-water-gas medium in conventional oil-water wells and heavy oil ultra-high temperature wells. At present, the electronic well temperature instrument used in domestic oil fields is tested in a conventional well at a temperature not higher than 150°C, and its use is very limited. Once encountering high temperature...

AI Technical Summary

Problems solved by technology

Once encountering high temperature or ultra-high temperature oil-water gas wells, in terms of the current use of traditional electronic well thermometers and traditional mechanical thermometers, the former, integrated circuits are not resistant to high temperatures, and cannot work normally in environments exceeding 150°C; the latter, in high-temperature environments However, the linearity is not good, drift often occurs, and it cannot accurately reflect the temperature in the well. Therefore, these two logging techniques cannot obtain accurate temperature measurement values.

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