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Efficient terrestrial heat taking well

A geothermal and high-efficiency technology, applied in the field of downhole operations, can solve problems such as thermal short circuit, easy corrosion of well walls, and scrapping of hot wells

Pending Publication Date: 2016-04-06
严建勋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] This kind of hot dry rock has a simple heat extraction method, but in the overshoot of extracting high-temperature medium, the heat dissipation rate is relatively high, and it is worth noting that the ammonia water injected into the well is corrosive and easily corrodes the well wall Causes a thermal short circuit, thereby rendering the thermal well useless

Method used

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Experimental program
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Effect test

Embodiment 1

[0024] Such as figure 1 , a high-efficiency geothermal heat extraction well of the present invention is characterized in that it includes an air compressor, an evaporator, an outer pipe and an inner pipe, the inlet of the evaporator is connected to the air compressor, the outlet is connected to the inner pipe, and the The outer pipe and the inner pipe are placed in the heat extraction well from the outside to the inside in turn. The inner pipe is equipped with a thermostat, the inner and outer walls of the inner pipe are coated with thermal insulation paint, and the inner and outer walls of the outer pipe are partly coated with thermal insulation paint. The best thermal insulation coating is gem scales.

[0025] The technical scheme of the present invention uses the characteristics of critical carbon dioxide to make it absorb a large amount of heat from underground hot dry rocks and then discharge it into the heat extraction well, which overcomes the problems of low heat trans...

Embodiment 2

[0035] Such as figure 1 , a high-efficiency geothermal heating well of the present invention is characterized in that it includes an air compressor, an evaporator, an outer pipe and an inner pipe, the inlet of the evaporator is connected to the air compressor, the outlet is connected to the outer pipe, and the outer pipe is connected to the outer pipe. The tube and the inner tube are placed in the heating well from the outside to the inside in turn. The inner tube is equipped with a thermal insulation heating wire. The thermal insulation coating is gem scales.

[0036] Other principles described in Embodiment 2 are the same as those in Embodiment 2, and will not be elaborated any more.

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Abstract

The invention discloses an efficient terrestrial heat taking well. The efficient terrestrial heat taking well comprises an air compressor, an evaporator, an outer pipe and an inner pipe. The inlet of the evaporator is connected with the air compressor, and the outlet of the air compressor is connected with the inner pipe. The outer pipe and the inner pipe are sequentially placed in the heat taking well from outside to inside.

Description

technical field [0001] The invention relates to downhole operation, in particular to a well device for heat extraction from hot dry rock. Background technique [0002] Geothermal heat is an energy source that comes from within the earth. The temperature of lava ejected from volcanoes on the earth is as high as 1200°C~1300°C, and the temperature of natural hot springs is mostly above 60°C, and some are even as high as 100°C~140°C. This shows that the earth is a huge heat reservoir, containing huge heat energy. This heat seeps out to the surface, so there is geothermal heat. Geothermal energy is a kind of clean energy and renewable energy, and its development prospect is very broad. [0003] The source of geothermal heat is mainly the heat energy generated by the decay of long-lived radioactive elements (mainly uranium 238, uranium 235, thorium 232 and potassium 40, etc.) inside the earth. Geothermal heat has different manifestations on the earth. According to its storage...

Claims

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Application Information

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IPC IPC(8): F24J3/08
CPCF24T10/10F24T2010/50F24T2201/00Y02E10/10
Inventor 严建勋
Owner 严建勋