Dynamic externally-mounted saturated electron compensation anti-corrosion device

Abstract

The utility model provides a dynamic externally-mounted saturated electron compensation anti-corrosion device. The device comprises a solar electronic compensation device, a wireless remote controller, a reference electrode and an oil pipe, the solar electronic compensation device comprises a mounting rack, a power distribution cabinet, a solar panel and an auxiliary anode; the power distribution cabinet is internally provided with a voltage regulating power supply, a voltage measuring meter and a charging and discharging controller, the wireless remote controller comprises a wireless communication module and a PLC, the PLC is electrically connected with the wireless communication module, the voltage regulating power supply, the charging and discharging controller and the voltage measuring meter, and the voltage measuring meter is connected between the reference electrode and the oil pipe through a wire. And the reference electrode is buried in the soil close to the oil pipe. The auxiliary anode is used for supplementing a large number of electrons to the water injection well oil pipe, so that the protected metal oil pipe is in an electron surplus state, the oil pipe keeps negative potential, the potential of the oil pipe structure is lower than that of the surrounding environment, and the inner wall and the outer wall of the water injection well oil pipe can be protected against corrosion and perforation.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas well anti-corrosion, in particular to a dynamic external saturated electronic compensation anti-corrosion device. Background Art

[0002] With the continuous increase in the production and development of oil and gas fields and the comprehensive water content, coupled with the fact that the output fluids of oil, gas and water wells contain a large amount of corrosive substances, the ground gathering and transportation pipelines and downhole pipes have been severely corroded, which has become a serious hidden danger to the safe production and operation of oil fields. At present, the anti-corrosion of oil and water well pipes is mainly carried out by adding chemical agents in the annular space of the oil casing. However, due to the complexity of the downhole medium environment and process conditions, the strong corrosiveness of the oil and water medium and the increase in well temperature, the corrosion rate of the corrosion inhibitor has a significant downward trend, so that the downhole pipes are still severely corroded. In particular, improper use at high temperatures will accelerate the corrosion of the pipe.

[0003] In addition, chemical corrosion protection requires regular monitoring of corrosion conditions and adjustment of agent types and dosing processes based on monitoring results, which increases maintenance costs. Chemical agents may cause certain pollution to the environment, especially in unmanned areas outdoors in oil fields. If handled improperly, they may damage the ecosystem. Utility Model Content

[0004] The purpose of the utility model is to provide a dynamic external saturated electronic compensation anti-corrosion device to solve the corrosion of oil, gas and water well pipes and ensure the normal production of oil, gas and water wells. The device greatly reduces the corrosion rate of oil and gas well pipes and effectively prolongs the service life of downhole pipes. The device adopts remote monitoring technology, which is particularly suitable for unmanned areas in oil fields. It can monitor the corrosion status and protection effect of oil pipes in real time, adjust the protection parameters in time, and ensure the safe operation of oil pipes.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A dynamic external saturated electronic compensation anti-corrosion device, characterized by comprising a solar electronic compensation device, a wireless remote controller, a reference electrode and an oil pipe;

[0007] The solar electronic compensation device includes a mounting frame, a power distribution cabinet, a solar panel and an auxiliary anode; the power distribution cabinet and the solar panel are fixed on the mounting frame, and the mounting frame is fixed on the ground; a voltage regulating power supply, a pressure gauge, and a charge and discharge controller are arranged in the power distribution cabinet, the auxiliary anode buried underground is connected to the positive pole of the voltage regulating power supply, the negative pole of the voltage regulating power supply is connected to the oil pipe buried underground through a wire, and the voltage regulating power supply is electrically connected to the solar panel through the charge and discharge controller;

[0008] The wireless remote controller is installed on the mounting frame, which includes a wireless communication module and a PLC controller. The PLC controller is electrically connected to the wireless communication module, the voltage regulating power supply, the charge and discharge controller and the pressure gauge respectively. The pressure gauge is connected between the reference electrode and the oil pipe through a wire. The reference electrode is buried in the soil near the oil pipe.

[0009] Furthermore, a sacrificial anode sleeve is sleeved on the outer side of the oil pipe.

[0010] Furthermore, the sacrificial anode sleeve is made of magnesium-aluminum-zinc alloy.

[0011] Furthermore, there are multiple auxiliary anodes, which are arranged in parallel and are respectively connected to the positive electrode of the voltage regulating power supply through a wire.

[0012] Beneficial technical effects of the utility model:

[0013] 1. The utility model adopts an auxiliary anode to supplement a large amount of electrons to the oil pipe of the water injection well, so that the protected metal oil pipe is in a state of excess electrons, the oil pipe maintains a negative potential, and the oil pipe structure potential is lower than the surrounding environment, which can simultaneously protect the inner and outer walls of the oil pipe of the water injection well from corrosion and perforation.

[0014] 2. The utility model adopts light energy as power source, which is convenient for realizing continuous and long-term protection of the oil pipe.

[0015] 3. The utility model can quickly balance the electron saturation of the oil pipe of the water injection well with a depth greater than 2500 meters by arranging a sacrificial anode sleeve on the outer casing of the water injection well oil pipe, so as to quickly reduce the corrosion rate.

[0016] 4. The dynamic external saturated electronic compensation anti-corrosion device of the utility model is suitable for the anti-corrosion of oil, gas and water well pipes, which greatly reduces the corrosion rate and more effectively prolongs the service life of the gathering and transportation pipelines and downhole pipes.

[0017] 5. The device adopts remote monitoring technology, which is especially suitable for unmanned areas in oil fields. It can monitor the corrosion condition and protection effect of the oil pipeline in real time, adjust the protection parameters remotely in time, and ensure the safe operation of the oil pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a dynamic external saturated electronic compensation anti-corrosion device of the utility model;

[0019] Figure 2 This is a schematic diagram of the signal transmission module of the PLC controller of the utility model.

[0020] Figure numerals: 1-oil pipe, 2-mounting frame, 3-distribution cabinet, 4-voltage regulating power supply, 5-auxiliary anode, 6-pressure gauge, 7-reference electrode, 8-solar panel, 9-sacrificial anode sleeve, 10-wireless remote controller, 1001-wireless communication module, 1002-PLC controller, 11-charge and discharge controller. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0022] In the description of the present utility model, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present patent. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set, they can be directly connected, or indirectly connected through an intermediate medium, or they can be internally connected between two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances. Example 1

[0023] like Figure 1 As shown, the present embodiment provides a dynamic external saturated electronic compensation anti-corrosion device, which is characterized by comprising a solar electronic compensation device, a wireless remote controller 10, a reference electrode 7 and an oil pipe 1;

[0024] The solar electronic compensation device includes a mounting frame 2, a power distribution cabinet 3, a solar panel 8 and an auxiliary anode 5; the power distribution cabinet 3 and the solar panel 8 are fixed on the mounting frame 2, and the mounting frame 2 is fixed on the ground; a voltage regulating power supply 4, a pressure gauge 6, and a charge and discharge controller 11 are arranged in the power distribution cabinet 3, the auxiliary anode 5 buried underground is connected to the positive pole of the voltage regulating power supply 4, the negative pole of the voltage regulating power supply 4 is connected to the oil pipe 1 buried underground through a wire, and the voltage regulating power supply 4 is electrically connected to the solar panel 8 through the charge and discharge controller 11;

[0025] The wireless remote controller 10 is installed on the mounting frame 2, and includes a wireless communication module 1001 and a PLC controller 1002. The PLC controller 1002 is electrically connected to the wireless communication module 1001, the voltage regulating power supply 4, the charge and discharge controller 11 and the pressure gauge 6 respectively. The pressure gauge 6 is connected between the reference electrode 7 and the oil pipe 1 through a wire. The reference electrode 7 is buried in the soil near the oil pipe 1.

[0026] In this embodiment, the pressure gauge 6 adopts an intelligent communication meter with model PZ96L-E4 / , and transmits data with the PLC controller 1002 through RS485 communication. The pressure gauge 6 is used to measure the potential difference between the protected oil pipe 1 and the reference electrode 7, and transmits the potential change between the protected oil pipe 1 and the reference electrode 7 to the PLC controller 1002 in real time. The PLC controller 1002 adopts the Siemens S7 series. The PLC controller 1002 remotely uploads the potential data to the remote control center through the wireless communication module 1001. The wireless communication module 1001 adopts a 4G / 5G communication module; due to the use of remote monitoring technology, the device is particularly suitable for unmanned areas outdoors in oil fields. It can monitor the corrosion condition and protection effect of the oil pipe in real time, and adjust the protection parameters remotely in time to ensure the safe operation of the oil pipe.

[0027] There are four auxiliary anodes 5, which are arranged in parallel and connected to the positive electrode of the voltage regulating power supply 4 through wires. The auxiliary anode 5 uses a high silicon cast iron anode body with a specification of AK-YJA-219*2000, the reference electrode 7 uses a copper sulfate reference electrode 7 with a specification of AK-CBC1, the solar panel 8 uses a solar photovoltaic panel with a specification of 300W~21V, and the voltage regulating power supply 4 uses a lithium battery with a capacity of 100A, and uses light energy as a power source to achieve continuous long-term protection of the oil pipe 1. The PLC controller 1002 obtains the status information of the charge and discharge controller 11 and the status of the voltage regulating power supply in real time, and makes corresponding control decisions based on this information. Example 2

[0028] On the basis of Example 1, a sacrificial anode sleeve 9 is further provided on the outside of the oil pipe 1, which can quickly balance the electron saturation of the oil pipe 1 of the water injection well and rapidly reduce its corrosion rate.

[0029] In this embodiment, the sacrificial anode sleeve 9 is made of magnesium-aluminum-zinc alloy.

[0030] The device of this embodiment is particularly suitable for protecting the oil pipe 1 of an injection well with a depth of more than 2500 meters.

[0031] When debugging the dynamic external saturated electronic compensation anti-corrosion device of the utility model, the voltage is adjusted to -0.85~1.5V by a micro-electric regulator, and the current is adjusted to -20~400mA by a micro-electric regulator. The pressure gauge 6 reads below -0.85V, indicating that the protected oil pipe 1 is in a protected state.

[0032] Test Case

[0033] Comparison group: Well SN6205 in Shinan 21 block of Luliang Oilfield operating area did not install the dynamic external saturated electronic compensation anti-corrosion device. A hanging piece was placed on the 2,000-meter oil pipe underground for 7 days to measure the corrosion rate of the hanging piece.

[0034] Experimental group 1: Well SN6303 in Shinan 21 block of Luliang Oilfield operating area, using the dynamic external saturated electron compensation anti-corrosion device of Example 1, hanging pieces at 2000 meters underground for 10 days, and measuring the corrosion rate of the hanging pieces.

[0035] Experimental group 2: Well SN6303 in Shinan 21 block of Luliang Oilfield operating area, using the dynamic external saturated electron compensation anti-corrosion device of Example 2, hanging pieces at 2000 meters underground for 10 days, and measuring the corrosion rate of the pieces.

[0036]

[0037] Application Examples

[0038] The dynamic external saturated electronic compensation anti-corrosion device provided by the utility model is applied to various oil fields to carry out rate detection before and after anti-corrosion. The detection results are shown in the following table.

[0039]

[0040] It can be seen that the corrosion rate of the dynamic external saturated electronic compensation anti-corrosion device of the utility model is significantly reduced, which is much lower than the corrosion rate without the anti-corrosion device, so that oil and water wells no longer need to be injected with chemicals for anti-corrosion and anti-scaling. It is safe, environmentally friendly, pollution-free, and can remotely monitor the potential of the protective body in real time to stabilize the corrosion rate, thereby achieving the purpose of anti-corrosion. From the effect of oil field application, the corrosion rate before and after comparison has dropped to less than 0.05mm / a, so that the metal will no longer corrode, and the oil, water, gas wells, gathering and transportation pipelines, water jacket furnaces and other equipment in the oil field are effectively protected. The economic benefits have been effectively rewarded, providing support for reducing costs and increasing efficiency in oil fields.

[0041] The above is a preferred embodiment of the utility model, which is used to explain the technical solution of the utility model in more detail, so that those skilled in the art can understand and use the utility model well. Those skilled in the art can also make routine modifications, equivalent substitutions and improvements within the spirit and principles of the utility model.

Claims

1. A dynamic external saturated electronic compensation anti-corrosion device, characterized in that: It includes solar electronic compensation device, wireless remote controller, reference electrode and oil pipe; The solar electronic compensation device includes a mounting frame, a power distribution cabinet, a solar panel and an auxiliary anode; the power distribution cabinet and the solar panel are fixed on the mounting frame, and the mounting frame is fixed on the ground; a voltage regulating power supply, a pressure gauge, and a charge and discharge controller are arranged in the power distribution cabinet, the auxiliary anode buried underground is connected to the positive pole of the voltage regulating power supply, the negative pole of the voltage regulating power supply is connected to the oil pipe buried underground through a wire, and the voltage regulating power supply is electrically connected to the solar panel through the charge and discharge controller; The wireless remote controller is installed on the mounting frame, which includes a wireless communication module and a PLC controller. The PLC controller is electrically connected to the wireless communication module, the voltage regulating power supply, the charge and discharge controller and the pressure gauge respectively. The pressure gauge is connected between the reference electrode and the oil pipe through a wire. The reference electrode is buried in the soil near the oil pipe.

2. The dynamic external saturated electronic compensation anti-corrosion device according to claim 1 is characterized in that: A sacrificial anode sleeve is also sleeved on the outer side of the oil pipe.

3. The dynamic external saturated electronic compensation anti-corrosion device according to claim 2 is characterized in that: The sacrificial anode sleeve is made of magnesium-aluminum-zinc alloy.

4. The dynamic external saturated electronic compensation anti-corrosion device according to claim 1 is characterized in that: There are multiple auxiliary anodes, which are arranged in parallel and are respectively connected to the positive electrode of the voltage regulating power supply through a wire.

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