A multi-channel signal acquisition circuit for downhole power system parameter measurement

A signal acquisition and parameter measurement technology, applied in power supply testing, measuring devices, instruments, etc., can solve problems such as abnormal output voltage, high bottom hole temperature, and difficulty in completely eliminating potential safety hazards, so as to avoid misjudgment of faults and improve safety. , The effect of shortening the maintenance cycle

Inactive Publication Date: 2015-10-21
CNPC BOHAI DRILLING ENG
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Problems solved by technology

[0003] Due to the high bottom temperature, large vibration, and harsh working conditions, smart drilling tools mostly use mud turbine generators to generate AC power. Due to large fluctuations in mud flow, the AC power generated has a wide range of changes. Therefore, regulated power supply technology is usually used to convert AC power into stable DC power that meets the needs of electrical loads. However, this AC-DC-DC conversion power supply scheme has a complex structure and involves many intermediate links. Any A problem in one link may cause abnormal output voltage. If there is no real-time monitoring and recording of

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  • A multi-channel signal acquisition circuit for downhole power system parameter measurement
  • A multi-channel signal acquisition circuit for downhole power system parameter measurement
  • A multi-channel signal acquisition circuit for downhole power system parameter measurement

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[0021] The multi-channel signal acquisition circuit for measuring the parameters of the downhole power supply system provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Such as figure 1 As shown, the multi-channel signal acquisition circuit for parameter measurement of downhole power supply system provided by the present invention includes:

[0023] The microprocessor 1, the parameter acquisition circuit 2, the storage circuit 3, the clock circuit 4, the reset circuit 5 and the computer 6, in which: the microprocessor 1 is connected with the parameter acquisition circuit 2, the storage circuit 3, the clock circuit 4, the reset circuit 5 and The computer 6 is connected.

[0024] The parameter acquisition circuit 2 includes multiple DC voltage signal acquisition circuits 21, multiple current signal acquisition circuits 22, generator speed signal acquisition circuit 23, and downhole temperatu...

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Abstract

The invention provides a multi-channel signal acquisition circuit for downhole power system parameter measurement. The multi-channel signal acquisition circuit comprises a micro-processor, a parameter acquisition circuit, a storage circuit, a clock circuit, a resetting circuit and a computer. The micro-processor is connected with the parameter acquisition circuit, the storage circuit, the clock circuit, the resetting circuit and the computer. The signal acquisition circuit added in a power supply of an intelligent drilling tool can monitor the working state of a downhole power system, record the voltage and current change condition of each link of the power system, provide objective and authentic measured data for the fault analysis and maintenance of the power system of the intelligent drilling tool, prevent hidden danger of fault misjudgment and risk oversight caused by single ground detection, shorten the maintenance period of the intelligent drilling tool, improve the safety and stability of downhole work of the intelligent drilling tool and prolong the service life of the intelligent drilling tool.

Description

technical field [0001] The invention relates to a signal acquisition circuit for measuring parameters of an underground power supply system, in particular to a multi-channel signal acquisition circuit for measuring parameters of an underground power supply system. Background technique [0002] In the field of oil drilling, intelligent drilling tools use electronic control units to complete the collection, processing and decision-making of downhole information, and the drive unit completes the corresponding operations. The power source of electronic control units, drive units and other components is supplied by the downhole power system. The quality of the working conditions will directly affect whether the intelligent drilling tools can work safely, normally and stably. [0003] Due to the high bottom temperature, large vibration, and harsh working conditions, smart drilling tools mostly use mud turbine generators to generate AC power. Due to large fluctuations in mud flow, ...

Claims

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Application Information

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IPC IPC(8): G01R31/40G01D21/02
Inventor 李绍辉郭佳魏春明韩晓文魏庆振金平白大鹏张猛李志广
Owner CNPC BOHAI DRILLING ENG
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