System and method for redundant design of downhole power supply with single-core power supply for well logging

A design system and single-core cable technology, applied in wellbore/well components, measurement, earthwork drilling and mining, etc., can solve the problems of insufficient service life of the power supply circuit of the intelligent water distributor, improve long-term reliability, realize simple, and solve The effect of insufficient service life

Active Publication Date: 2022-04-19
贵州航天凯山石油仪器有限公司
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a redundant design system of single-core power supply downhole power supply for well logging, which effectively solves the problem of insufficient service life of the power supply circuit of the intelligent water distributor caused by the high temperature environment

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  • System and method for redundant design of downhole power supply with single-core power supply for well logging

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Embodiment Construction

[0012] The present invention will be further described in detail through specific embodiments below, but these embodiments are only for illustration and do not limit the scope of the present invention.

[0013] Please refer to figure 1 , the single-core power supply downhole power supply redundant design system for well logging of the present invention includes: at least two identical power supply circuits A and B, and the power supply circuits A and B are connected through an isolation processing circuit, and the power supply circuits A and power supply circuit B use the same single-core cable to supply power, so that when the cable core wire is positive and the shell is negative, the power circuit A works normally and supplies power to the underground non-power circuit; when the core wire is negative and the shell is positive, the power supply Circuit B works normally and supplies power to the underground non-power circuit.

[0014] In one embodiment, the first end of the p...

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Abstract

The present disclosure relates to a single-core power supply downhole power redundancy design system and method for well logging. The system includes: at least two identical power circuits A and B, and the power circuits A and B are separated by an isolation processing circuit. The power supply circuit A and the power supply circuit B are powered by the same single-core cable, so that when the cable core wire is positive and the shell is negative, the power supply circuit A works normally and supplies power to the underground non-power supply circuit. When the core wire is negative, The shell is timing, and the power circuit B is working normally, supplying power to the underground non-power circuit. The invention has the advantages of simple implementation, double the service life of the downhole power supply for well logging under the condition of a small increase in cost, and effectively improve the long-term reliability of the downhole power supply circuit. It effectively solves the problem of insufficient service life of the power supply circuit of the intelligent water distributor due to the high temperature environment.

Description

technical field [0001] The invention relates to a redundant design system and method for downhole power supply of a single-core power supply for well logging. Background technique [0002] Well logging instruments are commonly used equipment in the process of oilfield exploitation. Through the reasonable use of logging instruments, the production efficiency can be effectively improved, the unreasonable energy consumption can be reduced, and high economic benefits can be brought to the oilfield production side. [0003] There are many types of logging instruments, one of which is a permanent logging instrument; this type of instrument is powered by a single-core cable, and goes downhole with the string through operation; the installation or replacement process during its use is expensive; therefore, the oil field Users have higher requirements on the long-term reliability and service life of this type of logging equipment. In addition, the logging tool works downhole, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/00E21B49/00
Inventor 余华何天成
Owner 贵州航天凯山石油仪器有限公司
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