Temperature measuring device and method for ultra-high temperature wellbore
A technology of temperature measurement and ultra-high temperature, which is applied in the direction of measuring devices, electric devices, and thermometers using electric/magnetic elements that are directly sensitive to heat, etc. It can solve the problem of reducing the effective time of thermos insulation, short effective working time, and measurement accuracy. Influence and other problems, to achieve the effect of simple and reliable structure, wide application range, and meet the temperature measurement requirements
Active Publication Date: 2021-03-30
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
However, the disadvantage of this type of scheme is that the working hours are greatly limited
The main reason is that when the thermos bottle works in a high-temperature environment, the high temperature outside will inevitably penetrate the thermos bottle and enter the internal circuit system, especially when the temperature in the well reaches or exceeds 200 degrees, the effective time of the thermos bottle heat preservation is fast. reduce
After high temperature penetration, many electronic components will not continue to work normally and effectively, the effective working time is short, and the measurement accuracy is also greatly affected
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[0035] In order to make the technical solutions and advantages of the present invention more clearly, exemplary embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely the embodiment of the invention, not the exhaustions of all embodiments. And in the case of an inseparation, the features and embodiments in the present invention can be combined with each other.
[0036] The inventors noticed in the process of the invention, the temperature measuring device in the wellbore is affected by the temperature, the effective working time is short, and the measurement accuracy is not high.
[0037] For the above insufficient, embodiments of the present invention proposes a temperature measuring apparatus for ultra-high temperature wellbore, which will be described in detail below.
[0038] figure 1 An embodiment of the temperature measuring apparatus for ultra-high temperat...
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The invention provides a temperature measuring device and method for an ultrahigh temperature shaft. The temperature measuring device comprises a cable winch, a pressure bearing tube, a cable matchingcircuit module and an amplification and storage display module, wherein the cable winch is arranged above a well; a multicore cable is arranged on the cable winch; a temperature sensor is arranged inthe pressure bearing tube, and is connected with one end of the multicore cable through a conversion joint; the cable matching circuit module is arranged above the well and is connected with the other end of the multicore cable; the cable matching circuit module is constructed into a mode that a line formed by an equivalent resistor in the cable matching circuit module, the temperature sensor andthe multicore cable forms a temperature measuring balance electric bridge; and the input end of the amplification and storage display module is connected with the output end of the cable matching circuit module to realize the signal amplification and display. The temperature measuring device has the advantages that circuits and electronic devices can be protected from being influenced by high temperature for a longer time; the integral structure is simple; and the measurement cost is low.
Description
Technical field [0001] The present invention belongs to underground high temperature or ultra-high temperature measurement technology, which is specifically used for ultra-temperature measurements having more than 200 degrees in the development process of dry heat rock, oil and gas, geothermal heat, etc., which specifically involves a temperature measuring device for ultra-high temperature wellbore. And methods. Background technique [0002] During the development of the underground energy development represented by dry heated rock, since the temperature of the wellbore has exceeded 230 degrees, some even aspects up to 300 degrees, and the higher the temperature, the greater the significance of heat development. [0003] The existing wellbore temperature measuring instrument method is generally measuring sensors, acquisition circuits, processing circuits, integrated on one or more instruments, and then quickly below the wellbore, and performs various data acquisitions. Since the ...
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IPC IPC(8): G01K7/25
CPCG01K7/25
Inventor 倪卫宁张卫闫立鹏李新米金泰
Owner CHINA PETROLEUM & CHEM CORP