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Logging-while-drilling underground circuit semiconductor positive cooling system and method

A semiconductor and circuit technology, used in cooling systems, active semiconductor cooling systems and cooling fields along with drilling circuits, can solve problems such as limited high temperature resistance, and achieve the effects of ensuring cooling, improving life and stability

Active Publication Date: 2019-05-21
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These measures deal with the problem from the perspective of passive "temperature resistance" of the components themselves, and the high temperature resistance effect is limited; at the same time, the high temperature packaging technology of components is still a bottleneck problem

Method used

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  • Logging-while-drilling underground circuit semiconductor positive cooling system and method
  • Logging-while-drilling underground circuit semiconductor positive cooling system and method
  • Logging-while-drilling underground circuit semiconductor positive cooling system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In Example 1, a Stirling refrigerator is used to reduce the downhole circuit temperature. The Stirling refrigerator adopts the principle of gas regenerative refrigeration, and its structural characteristics are: no valve is used to distribute gas between the compression part and the expansion part, the compression part and the expansion part are integrated, coupled by the corresponding mechanism, with the same frequency operation. It is this structure that realizes the refrigeration cycle process of isothermal compression, constant volume heat release, isothermal expansion, and constant volume heat absorption. During the refrigeration cycle, the cooling load generated by the cold finger of the Stirling refrigerator is evenly transmitted to each electronic component or sensing component through the T-shaped heat conduction block, thereby reducing the temperature of the entire circuit and avoiding shortening its life. or failure occurs.

[0033] Based on the above princ...

Embodiment 2

[0050] In Example 2, semiconductor refrigeration chips are used to reduce the temperature of downhole circuits. Its working principle is: after the semiconductor cooling chip is powered on, the electrons start from the negative electrode, first pass through the P-type semiconductor, and absorb heat there; then the electrons move to the N-type semiconductor, and then release the heat. Every time a PN module is passed, the heat is transferred from one side to the other; a large number of N-type and P-type semiconductors are arranged to form a whole, which becomes a semiconductor cooling chip. The overall effect is that the heat is transferred from one side of the semiconductor cooling chip to the other. On the one hand, a temperature difference is created, thus forming a cold end and a hot end. Relying on the cooling effect of the semiconductor refrigeration sheet, the heat generated by the downhole circuit is transferred to the shell through the interaction of the heat conducti...

Embodiment 3

[0067] In Example 3, semiconductor refrigeration chips and phase change materials are used to reduce the downhole circuit temperature. Its working principle is: after the semiconductor cooling chip is powered on, the electrons start from the negative electrode, first pass through the P-type semiconductor, and absorb heat there; then the electrons move to the N-type semiconductor, and then release the heat. Every time a PN module is passed, the heat is transferred from one side to the other; a large number of N-type and P-type semiconductors are arranged to form a whole, which becomes a semiconductor cooling chip. The overall effect is that the heat is transferred from one side of the semiconductor cooling chip to the other. On the one hand, a temperature difference is created, thus forming a cold end and a hot end. The heat generated by the downhole circuit enters the phase-change material through the heat-conducting material, and then the end face of the phase-change material...

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Abstract

The invention relates to a logging-while-drilling underground circuit semiconductor positive cooling system and method. The system comprises a shell and a multi-level semiconductor chilling plate arranged in the shell, wherein the semiconductor chilling plate comprises a first level semiconductor chilling plate, a second level semiconductor chilling plate and a third level semiconductor chilling plate; a hot end of the first level semiconductor chilling plate is connected with the shell through the first heat conducting plate, while a cold end is connected with a hot end of the second level semiconductor chilling plate through a second heat conducting plate; a cold end of the second semiconductor chilling plate is connected with a hot end of a third semiconductor chilling plate through a third heat conducting plate; and a cold end of the third level semiconductor chilling plate is connected with a underground circuit through a fourth heat conducting plate. The system has the advantagesthat 1, the temperature of the underground circuit is lowered by positive cooling of the semiconductor chilling plate instead of own passive cooling of an element; 2, an underground power generator is used for supplying power, so that the underground circuit can be cooled continuously, and the service life and stability of the underground circuit are prolonged and improved.

Description

technical field [0001] The invention relates to a cooling system and method, belonging to the technical field of drilling, in particular to an active cooling system and cooling method for downhole circuit semiconductors while drilling. Background technique [0002] The formation of the wellbore of oil and gas wells is produced by the rotation of the drill string to drive the drill bit or the downhole power drilling tool to drive the drill bit to cut the underground rock formation. The drill bit and downhole tools need to extend several kilometers in the wellbore. [0003] During the drilling process, in order to mitigate the risk factors related to drilling operations, it is necessary to obtain as much information as possible about the downhole environment, such as geological parameters, engineering parameters and process parameters. Therefore, various measurement tools are installed near the bottom of the drill string near the drill bit, such as measurement while drilling (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K7/20
Inventor 刘珂苏义脑高文凯窦修荣盛利民王家进艾维平曹冲王磊
Owner BC P INC CHINA NAT PETROLEUM CORP
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