A DC power supply system for an oil-water well casing cathodic protection and anti-corrosion instrument

Abstract

The invention provides a DC power supply system for an oil-water well casing cathodic protection and anti-corrosion instrument, which includes a DC power supply system of a switching power supply module and an RTU module. The DC power supply system of the switching power supply module is connected in parallel with a voltage monitoring instrument, and the voltage monitoring instrument is electrically connected to the RTU. module, the RTU module is electrically connected to the current monitoring instrument, and the switching power supply module is used to output continuous regulation DC voltage; the voltage monitoring instrument and the current monitoring instrument are used to display the DC voltage and current on the spot, and the present invention realizes digital remote monitoring To the real unattended, the authenticity of the control parameters of the cathodic protection system is guaranteed, and the cathodic protection system will not be burned when there is thunder and lightning; the pulse width modulation method is used for shunting, and the operation efficiency is high; no special power distribution room is required to reduce the initial investment cost ; Reached the goal of long-term safe and efficient operation of oil and water well casing without being corroded.

Description

technical field [0001] The invention relates to a DC power supply system for an anti-corrosion instrument, in particular to a DC power supply system for an oil-water well casing cathodic protection anti-corrosion instrument. Background technique [0002] The reason for casing corrosion in oil and water wells is essentially the electrochemical corrosion of the primary battery on the steel surface. The potential of each part of the steel surface is not completely the same. The part with a higher potential forms the cathode area, and the cathode reaction occurs; The part with lower potential forms the anode region, and the anode reaction occurs. The electrons generated after metal ionization in the anode area are transferred to the cathode area for cathodic reaction, and the flow of ions in the electrolyte solution constitutes a localized corrosion battery. For the entire wellbore casing, different cathode and anode regions will be formed due to the differences in water salini...

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Problems solved by technology

[0006] In order to overcome the problem of digital remote monitoring in existing methods, the present invention provides a DC power supply system for oil and water well casing cathodic protection and anti-corrosion instrument. , which ensures the authenticity of the control parameters of the cathodic protection system, and does not burn down the cathodic protection system during thunder and lightning; does not need porcelain disc resistors for shunting, and has high operating efficiency; does not require a special power distribution room, reducing the initial investment cost; reaching oil The goal of long-term safe and efficient operation of water well casing is not corroded

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