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Underground temperature difference power generation system based on vortex tube and power generation method and design implementation method of underground temperature difference power generation system

A technology of thermoelectric power generation and eddy current tube, which is used in generators/motors, electrical components, earth-moving drilling, etc., can solve the problems of heat loss during transfer and transfer, poor heat transfer effect, etc., to avoid damage to the cable structure, The effect of low cost and simple structure

Inactive Publication Date: 2021-03-23
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hot and cold fluids coming out of the vortex tube of the system first contact with two thermocouples, and then the two thermocouples respectively contact with the hot and cold ends of the thermoelectric power generation device. The heat will be lost during the transfer process, and the heat transfer effect will be improved. Difference

Method used

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  • Underground temperature difference power generation system based on vortex tube and power generation method and design implementation method of underground temperature difference power generation system
  • Underground temperature difference power generation system based on vortex tube and power generation method and design implementation method of underground temperature difference power generation system
  • Underground temperature difference power generation system based on vortex tube and power generation method and design implementation method of underground temperature difference power generation system

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Experimental program
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Effect test

Embodiment 1

[0050] Such as figure 1 A downhole thermoelectric power generation system based on a vortex tube is shown, including a wellbore. The wellbore includes an oil pipe 12 and a casing 11 arranged sequentially from inside to outside, and the area between the oil pipe 12 and the casing 11 is an oil casing annulus cavity 13 . The oil jacket annular cavity body 13 is provided with a power generation part protective cover 23 and a power storage part protective cover 27 connected with the power generation part protective cover 23 .

[0051] A vortex tube 100 and a thermoelectric power generation device 300 are arranged inside the power generation part protective cover 23 ;

[0052] The inlet of the vortex tube is connected with a fluid inlet device, and the ports at both axial ends of the vortex tube are respectively provided with a low-temperature fluid outlet and a high-temperature fluid outlet.

[0053] Such as figure 2 with image 3 As shown, the thermoelectric power generation ...

Embodiment 2

[0074] The vortex tube 100 is a downstream vortex tube, and the others are the same as in the first embodiment.

Embodiment 3

[0076] Adopt the same power generation method steps as in Embodiment 1, the difference is that the gas separated at the inlet of the high gas-oil ratio oil well pump and entering the oil jacket annulus 13 provides the downhole high-pressure gas source for the vortex tube 100, and the fluid inlet device 24 is connected with the oil jacket The annulus 13 is connected and the entire downhole thermoelectric power generation system is located at a depth above the fluid level of the oil well.

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Abstract

The invention relates to an underground temperature difference power generation system based on a vortex tube and a power generation method and design implementation method of the underground temperature difference power generation system. The system comprises an oil pipe and a sleeve, and an area between the oil pipe and the sleeve is an oil jacket annular cavity. A power generation part protective sleeve and a power storage part protective sleeve are arranged in the oil jacket annular cavity. The vortex tube and a temperature difference power generation device are arranged in the power generation part protective sleeve; and an area among the power generation part protective sleeve, the temperature difference power generation device and the vortex tube is a power generation part annular cavity. A fluid inlet device is connected to an inlet of the vortex tube, and a low-temperature fluid outlet and a high-temperature fluid outlet are formed in ports of the two axial ends of the vortextube correspondingly. The temperature difference power generation device comprises a supporting part and a temperature difference power generation set. A boosting voltage stabilizer and an electric power storage module are arranged in the power storage part protective sleeve. According to the underground temperature difference power generation system, under the condition that no external power supply is needed, autonomous power generation can be achieved through the temperature difference generated when underground fluid flows through the vortex tube, and stable electric energy is provided forunderground equipment.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a downhole thermoelectric power generation system based on vortex tubes, a power generation method, and a design and realization method thereof. Background technique [0002] At present, most of the small equipment used for dynamic monitoring and production control of oil and gas reservoirs are mostly powered by disposable or rechargeable batteries. These traditional chemical batteries have shortcomings such as large volume, short life, limited power supply and need to be replaced regularly, which cannot meet the needs of long-term downhole production monitoring and control. Therefore it is very important to seek a long-term stable underground power generation technology. [0003] The vortex tube is a simple energy separation device, which can separate the inlet working fluid into a fluid higher than the inlet temperature and a fluid lower than the inlet te...

Claims

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Application Information

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IPC IPC(8): E21B41/00H02N11/00
CPCE21B41/0085H02N11/002Y02E10/10
Inventor 刘均荣
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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