A single-chip microcomputer-based acquisition system and control method for downhole power supply parameters

Abstract

A downhole power supply parameter acquisition system and control method based on a single chip computer. The system includes a downhole parameter acquisition unit and a surface parameter display unit. The downhole parameter acquisition unit is connected to the downhole power supply system, including a processor, a parameter measurement unit, a system reset unit, a parameter storage unit, a serial communication unit and a clock synchronization unit; the surface parameter display unit The unit includes a computer, a parameter display unit, a remote control unit, a memory management unit and a status display unit. The effect of the present invention: in the power supply of the intelligent drilling tool, by adding a parameter acquisition circuit, the working state of the downhole power system and the change of the voltage and current value of each link when the power system fails can be monitored and recorded, which is the power supply of the intelligent drilling tool The fault analysis and maintenance of the system provide objective and real measurement data, which avoids the hidden dangers of fault misjudgment and risk oversight caused by only relying on ground detection, and shortens the maintenance cycle of intelligent drilling tools.

Description

technical field [0001] The invention belongs to the technical field of oil and natural gas drilling equipment, and in particular relates to an acquisition system and control method of downhole power supply parameters based on a single-chip microcomputer. Background technique [0002] The power supply of the intelligent drilling tool is responsible for providing the electronic control unit, drive unit, etc. with stable DC power that meets the power demand. It is the power source for the operation of the entire intelligent drilling tool, and its working status directly affects the safety of the intelligent drilling tool. , Normal and stable work. [0003] The downhole power supply system usually adopts the power supply strategy of AC-DC-DC conversion to meet the needs of different power loads under the harsh working conditions of the downhole. This power supply method is to generate low-frequency three-phase AC power from the mud turbine generator. , the use of regulated powe...

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Problems solved by technology

[0003] The downhole power supply system usually adopts the power supply strategy of AC-DC-DC conversion to meet the needs of different power loads under the harsh working conditions of the downhole. This power supply method is to generate low-frequency three-phase AC power from the mud turbine generator. , the use of regulated power supply technology for DC-DC conversion has the disadvantages of complex structure and many intermediate links. Any problem in any link may cause abnormal output voltage. If there is no real-time monitoring and recording of the key node parameters of the downhole power supply, it will inevitably lead to Troubleshooting is difficult, and safety hazards are difficult to completely eliminate. For an underground power system equipped with node monitoring and recording functions, the structural design and detection methods of the parameter acquisition part will directly affect its work in high temperature, vibration, and shock environments. If the measurement data has a large error, the ground staff will not be able to make correct analysis decisions on the working conditions of the downhole power system based on the measurement data, and may even draw completely wrong conclusions, which will seriously affect the intelligent drilling tools. Maintenance cycle, safety, stability and service life

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