DC power supply system of oil-water well bushing cathode protection anti-corrosion instrument

Abstract

The invention provides a DC power supply system of an oil-water well bushing cathode protection anti-corrosion instrument. The system includes a switch power supply module DC power supply system and an RTU module. The switch power supply module DC power supply system is electrically connected to a voltage monitoring instrument in parallel. The voltage monitoring instrument is electrically connected to the RTU module. The RTU module is electrically connected to a current monitoring instrument. A switch power supply module is used for outputting continuously regulated and controlled DC voltages. The voltage monitoring instrument and the current monitoring instrument are used for displaying DC voltages and currents on site. People do not need to be on duty since digital remote monitoring is achieved, the authenticity of control parameters of a cathode protection system is guaranteed, and the cathode protection system is prevented from being burnt during thunder and lightning. A pulse width modulation mode is adopted for shunting, and the operation efficiency is high. A power distribution room is not specially needed, so investments and costs in an initial stage are reduced. An oil-water well bushing is prevented from corroding so as to function in a safe and highly efficient manner for a long period of time.

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...

AI Technical Summary

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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