Method and device for monitoring battery module in measurement while drilling system

A technology of measurement-while-drilling and battery modules, which is applied in the field of oil and natural gas drilling, and can solve the problems that it is not suitable for downhole battery power detection, and the remaining battery power does not take into account the change of ambient temperature.
CN102435949AActive Publication Date: 2012-05-02BC P INC CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BC P INC CHINA NAT PETROLEUM CORP
Publication Date
2012-05-02

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Abstract

The embodiments of the invention provide a method and a device for monitoring a battery module in a measurement while drilling system. The method comprises the following steps of: respectively acquiring a main battery pack parameter and a subsidiary battery pack parameter by a main battery parameter detecting circuit and a subsidiary parameter detecting circuit, wherein the main battery pack parameter and the subsidiary battery pack parameter respectively comprise respective output current and output voltage of a main battery pack and a subsidiary battery pack; obtaining respective residual electric energy of the main battery pack and the subsidiary battery pack by a digital signal controller according to the main battery pack parameter and the subsidiary battery pack parameter; and judging whether at least one of the output voltage and the residual electric energy of the main battery pack which currently works is lower than a preset voltage threshold value and electric energy threshold value by the digital signal controller, wherein a shift switch is switched on, and the subsidiary battery pack is used for supplying power for the measurement while drilling system if at least one of the output voltage and the residual electric energy of the main battery pack which currently works is lower than the preset voltage threshold value and electric energy threshold value. The method can be used for exactly detecting the residual electric energy of the main battery pack and the subsidiary battery pack, and seamlessly switching the main battery pack and the subsidiary battery pack to supply power when the output voltage of the main battery pack is lower than the set threshold value caused by the insufficient residual electric energy of the main battery pack.
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Description

technical field

[0001] The invention relates to the field of oil and natural gas drilling, in particular to a monitoring method and device for a battery module of an underground measurement-while-drilling system. Background technique

[0002] In oil and natural gas drilling engineering, Measurement With Drilling (MWD) is a core technology in well trajectory monitoring and control, and the power module is one of the basic components of the MWD system. At present, the power supply in the measurement-while-drilling system is in the form of batteries and turbine generators. Due to the influence of high temperature, high pressure, severe vibration and other harsh working conditions, the dynamic measurement accuracy of the bottom hole orientation sensor during the drilling process is greatly reduced. In order to To obtain more accurate bottomhole engineering parameters, usually the engineering parameters are measured statically when the mud pump is stopped, and the mud turbine gen...

Claims

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