Sacrificial anode anti-corrosion device, equipment and system for production well pipe column

Abstract

The utility model provides a sacrificial anode anti-corrosion device, equipment and system for a production well pipe column, and the sacrificial anode anti-corrosion device for the production well pipe column comprises an oil pipe with a gap, an outer sleeve, a special-shaped sacrificial anode protection layer and a joint, the oil pipe with the gap is a cylinder with an opening in the pipe wall and is used for conveying well oil; the special-shaped sacrificial anode protection layer wraps the outer wall of the oil pipe with the gap and protrudes at the opening so as to form an annular internally-flowering special-shaped structure. The outer sleeve is arranged outside the special-shaped sacrificial anode protection layer in a sleeving manner so as to seal the oil pipe with the gap; slopes are formed by the outer-layer casing pipe and end openings in the two ends of the oil pipe with the gaps so that the outer-layer casing pipe can be connected with the connector. And the sacrificial anode anti-corrosion device is connected with the production well pipe column based on the connector, so that corrosion of the production well pipe column is slowed down through the special-shaped sacrificial anode protection layer.

Description

Technical Field

[0001] The utility model relates to the field of corrosion protection of production tubing equipment in heavy oil thermal recovery wells, in particular to a sacrificial anode corrosion inhibitor device, equipment and system for the tubing of a production well. Background Art

[0002] Corrosion protection of production well tubing is a crucial part of the oil and natural gas extraction process. It is of great significance to ensure the long-term stable operation of the pipeline system and reduce resource losses and safety accidents.

[0003] Heavy oil thermal recovery well tubing contains corrosive media and the temperature and pressure in the well create corrosive working conditions, which makes the production tubing and completion tools prone to corrosion, scaling and perforation, significantly reducing the service life of the tubing in the well and the production efficiency of the oil and water well system, restricting development benefits and increasing operating costs.

[0004] Therefore, sacrificial anodes are usually used to protect injection and production tubing from corrosion. However, there are certain limitations when using sacrificial anodes for corrosion protection of injection and production tubing. Due to the limitations of the wellbore structure, conventional block-shaped sacrificial anodes are difficult to work normally in the narrow wellbore space, which can easily lead to fluid blockage, poor electrical connection and other consequences, seriously affecting the cathodic protection effect of the sacrificial anode, and the anode structure needs to be further optimized. Utility Model Content

[0005] The purpose of this application is to provide a sacrificial anode corrosion inhibitor device, equipment and system for a production well pipe string to solve or alleviate the problems existing in the above-mentioned prior art.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions: a sacrificial anode corrosion inhibitor device for a production well pipe string, comprising: a slotted oil pipe 1, an outer casing 2, a special-shaped sacrificial anode protective layer 3, and a joint 4; the slotted oil pipe 1 is a cylinder with an opening on the pipe wall to transport well oil; the special-shaped sacrificial anode protective layer 3 is wrapped around the outer wall of the slotted oil pipe 1 and bulges at the opening to form an annular inner flowering special-shaped structure; the outer casing 2 is sleeved on the outside of the special-shaped sacrificial anode protective layer 3 to seal the slotted oil pipe 1; the ports at both ends of the outer casing 2 and the slotted oil pipe 1 form a slope to connect with the joint 4; the sacrificial anode corrosion inhibitor device is connected to the production well pipe string based on the joint 4 to slow down the corrosion of the production well pipe string through the special-shaped sacrificial anode protective layer 3.

[0007] Optionally, the slotted oil pipe 1 is provided with slots of 8 to 12 mm in width uniformly distributed along the axial direction, so as to reduce the contact area between the inner wall of the slotted oil pipe and the well oil through the 8 to 12 mm slots, thereby slowing down the corrosion rate of the special-shaped sacrificial anode protective layer 3.

[0008] Optionally, the slit oil pipe 1 is internally provided with 3-6 slits, so that the contact area between the inner wall of the slit oil pipe and the well oil is reduced through the 3-6 slits, and the corrosion speed of the special-shaped sacrificial anode protective layer 3 is slowed down.

[0009] Optionally, the slit oil pipe 1 is internally provided with 3-6 slits, so that the contact area between the inner wall of the slit oil pipe and the well oil is reduced through the 3-6 slits, and the corrosion speed of the special-shaped sacrificial anode protective layer 3 is slowed down.

[0010] Optionally, the slit oil pipe 1 is internally provided with 3-6 slits, so that the contact area between the inner wall of the slit oil pipe and the well oil is reduced through the 3-6 slits, and the corrosion speed of the special-shaped sacrificial anode protective layer 3 is slowed down.

[0011] Optionally, the annular inner flower special-shaped structure is provided with at least 4 uniformly distributed inner flower protrusions.

[0012] Optionally, a threaded structure is arranged on the slope to be connected with the threads of the joint 4.

[0013] Optionally, the special-shaped sacrificial anode protective layer 3 and the slit oil pipe 1 are fixed by metallurgical bonding to form an integrated structure.

[0014] The utility model also provides a kind of sacrificial anode anticorrosion equipment, comprising: special-shaped sacrificial anode protective layer, slit pipeline, outer sleeve, joint;The slit oil pipe is the cylinder with opening being arranged on pipe wall, to transport liquid;The special-shaped sacrificial anode protective layer is wrapped on the outer wall of the slit oil pipe, and it is bulged at the opening, to form annular inner flower special-shaped structure, expand the corrosion area of the special-shaped sacrificial anode protective layer;The outer sleeve is sleeved outside the special-shaped sacrificial anode protective layer, to seal the slit oil pipe;The port of the outer sleeve and the slit oil pipe two ends forms slope, to be connected with the joint;The sacrificial anode anticorrosion device is connected with pipe column based on the joint, to slow down the corrosion of the pipe column by the special-shaped sacrificial anode protective layer.

[0015] The utility model also provides a kind of sacrificial anode anticorrosion system, including any one of the produced well pipe column sacrificial anode anticorrosion device.

[0016] The utility model provides a sacrificial anode corrosion inhibitor device, equipment and system for a production well pipe string, wherein the sacrificial anode corrosion inhibitor device for the production well pipe string comprises: a slotted oil pipe 1, an outer casing 2, a special-shaped sacrificial anode protection layer 3 and a joint 4; the slotted oil pipe 1 is a column with an opening on the pipe wall for transporting well oil; the special-shaped sacrificial anode protection layer 3 is wrapped around the outer wall of the slotted oil pipe 1 and bulges at the opening to form an annular inner flowering special-shaped structure; the outer casing 2 is sleeved on the outside of the special-shaped sacrificial anode protection layer 3 to seal the slotted oil pipe 1; the ports at both ends of the outer casing 2 and the slotted oil pipe 1 form a slope to be connected to the joint 4; the sacrificial anode corrosion inhibitor device is connected to the production well pipe string based on the joint 4 to slow down the corrosion of the production well pipe string through the special-shaped sacrificial anode protection layer 3. The sacrificial anode protective layer with an annular inner flowering special-shaped structure effectively protects the slotted oil pipe 1 from corrosion. At the same time, the outer casing 2 ensures sealing. The sloped port design facilitates connection, which not only improves the anti-corrosion effect but also simplifies the installation and maintenance process, significantly extending the service life of the production well pipe string and providing more reliable and durable equipment guarantee for oil production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings and descriptions that constitute part of this application are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. Among them:

[0018] Figure 1 This is a structural diagram of a sacrificial anode corrosion inhibitor device for a production well tubing string according to an embodiment of the present application;

[0019] Figure 2 It is a side view of a sacrificial anode corrosion inhibitor device for a production well tubing string according to an embodiment of the present application. DETAILED DESCRIPTION

[0020] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. Each example is provided by way of explanation of the present application and does not limit the present application. In fact, it will be clear to those skilled in the art that modifications and variations can be made in the present application without departing from the scope or spirit of the present application. For example, a feature shown or described as part of one embodiment can be used in another embodiment to produce yet another embodiment. Therefore, it is expected that the present application includes such modifications and variations within the scope of the appended claims and their equivalents.

[0021] In the description of this application, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and do not require that this application must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this application. The terms "connected", "connected", and "set" used in this application should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0022] Figure 1 This is a structural diagram of a sacrificial anode corrosion inhibitor device for a production well tubing string according to an embodiment of the present application; Figure 2 This is a side view of a sacrificial anode corrosion inhibitor device for a production well pipe string according to an embodiment of the present application. Figure 1-2 As shown, a sacrificial anode corrosion inhibitor device for a production well pipe string comprises: a slotted oil pipe 1, an outer casing 2, a special-shaped sacrificial anode protective layer 3, and a joint 4; the slotted oil pipe 1 is a cylinder with an opening on the pipe wall for transporting well oil; the special-shaped sacrificial anode protective layer 3 is wrapped around the outer wall of the slotted oil pipe 1 and bulges at the opening to form an annular inner-flowering special-shaped structure; the outer casing 2 is sleeved on the outside of the special-shaped sacrificial anode protective layer 3 to seal the slotted oil pipe 1; the ports at both ends of the outer casing 2 and the slotted oil pipe 1 form a slope to connect with the joint 4; the sacrificial anode corrosion inhibitor device is connected to the production well pipe string based on the joint 4 to slow down the corrosion of the production well pipe string through the special-shaped sacrificial anode protective layer 3. The sacrificial anode protective layer with an annular inner flowering special-shaped structure effectively protects the slotted oil pipe 1 from corrosion. At the same time, the outer casing 2 ensures sealing. The sloped port design facilitates connection, which not only improves the anti-corrosion effect but also simplifies the installation and maintenance process, significantly extending the service life of the production well pipe string and providing more reliable and durable equipment guarantee for oil production.

[0023] Optionally, the slotted tubing 1 is internally provided with 3-6 slits uniformly distributed along the axial direction, with a width of 8-12 mm. These slits reduce the contact area between the inner wall of the slotted tubing and the well oil, slowing down the corrosion rate of the profiled sacrificial anode protective layer 3. By reducing the direct contact between the tubing and the fluid in the well, the electrochemical corrosion effect on the tubing and the profiled sacrificial anode protective layer 3 can be significantly reduced. This design can more effectively slow down the corrosion rate of the profiled sacrificial anode protective layer 3, thereby prolonging the service life of the corrosion inhibitor device. Moreover, the appropriate number and width of the slits can ensure the corrosion prevention effect while maintaining the overall structural stability of the tubing. This design can prevent the tubing from premature failure or structural damage due to corrosion. In addition, the number of 3-6 slits provides sufficient flexibility, which can be adjusted according to different well conditions and corrosion environments. This makes the corrosion inhibitor device more adaptable to a wider range of oil extraction scenarios and meets the corrosion prevention needs under different conditions. In addition, compared to increasing the number of slits, the design of 3-6 slits achieves good corrosion prevention effect while also considering cost factors. This design maintains high performance while reducing manufacturing and maintenance costs, improving overall economic efficiency. Finally, the tubing with an appropriate number of slits is relatively simple to manufacture, install, and maintain. This reduces the difficulty of installation and maintenance, improves work efficiency, and reduces potential operational risks.

[0024] Optionally, the slotted tubing 1 is internally provided with 3-6 slits uniformly distributed along the axial direction, with a width of 8-12 mm. These slits reduce the contact area between the inner wall of the slotted tubing and the well oil, slowing down the corrosion rate of the profiled sacrificial anode protective layer 3. By reducing the direct contact between the tubing and the fluid in the well, the electrochemical corrosion effect on the tubing and the profiled sacrificial anode protective layer 3 can be significantly reduced. This design can more effectively slow down the corrosion rate of the profiled sacrificial anode protective layer 3, thereby prolonging the service life of the corrosion inhibitor device. Moreover, the appropriate number and width of the slits can ensure the corrosion prevention effect while maintaining the overall structural stability of the tubing. This design can prevent the tubing from premature failure or structural damage due to corrosion. In addition, the number of 3-6 slits provides sufficient flexibility, which can be adjusted according to different well conditions and corrosion environments. This makes the corrosion inhibitor device more adaptable to a wider range of oil extraction scenarios and meets the corrosion prevention needs under different conditions. In addition, compared to increasing the number of slits, the design of 3-6 slits achieves good corrosion prevention effect while also considering cost factors. This design maintains high performance while reducing manufacturing and maintenance costs, improving overall economic efficiency. Finally, the tubing with an appropriate number of slits is relatively simple to manufacture, install, and maintain. This reduces the difficulty of installation and maintenance, improves work efficiency, and reduces potential operational risks.

[0025] Optionally, the slotted tubing 1 is internally provided with 3-6 slits uniformly distributed along the axial direction, each slit having a width of 10 mm. These slits reduce the contact area between the inner wall of the slotted tubing and the well oil, thereby slowing down the corrosion rate of the profiled sacrificial anode protective layer 3. These slits reduce the direct contact area between the inner wall of the tubing and the fluid in the well, thereby effectively reducing the erosion of the tubing and the profiled sacrificial anode protective layer 3 caused by electrochemical corrosion. This design significantly slows down the corrosion rate of the profiled sacrificial anode protective layer 3, thereby enhancing the corrosion protection effect. In addition, the uniform distribution of the slits not only ensures the corrosion protection effect, but also ensures the overall structural stability of the tubing. This design enables the tubing to maintain good structural strength and stability when subjected to complex environments such as well pressure, temperature, and corrosion. In addition, the 10 mm wide slits are easy to process and control during manufacturing, ensuring product consistency and reliability. At the same time, this design also facilitates inspection and maintenance during maintenance, reducing maintenance costs and difficulty. This embodiment is suitable for the corrosion protection needs of the tubing string in producing wells under different well conditions and corrosion environments. Whether it is a high-corrosion oil and gas field or a low-corrosion oil and gas field, this slotted tubing 1 can provide effective corrosion protection. Finally, by optimizing the number and width of the slits, this design not only maintains excellent corrosion protection effect, but also considers cost factors. This design provides a high cost performance while meeting the actual needs of the oil extraction industry.

[0026] Optionally, the slotted tubing 1 is internally provided with 4 slits to reduce the contact area between the inner wall of the slotted tubing and the well oil through the 10 mm slits, thereby slowing down the corrosion rate of the profiled sacrificial anode protective layer 3. Through the 4 slits, the contact area between the inner wall of the tubing and the fluid in the well can be reasonably controlled, thereby reducing the electrochemical corrosion effect. This significantly reduces the corrosion pressure on the profiled sacrificial anode protective layer 3, thereby effectively prolonging the service life of the corrosion protector device. In addition, the uniform distribution of the 4 slits ensures that the tubing can maintain good structural strength and stability when subjected to complex environments such as well pressure, temperature, and corrosion. This helps to prevent premature failure or structural damage of the tubing due to corrosion. In addition, the design of 4 slits is relatively simple to manufacture, easy to process and control. At the same time, during maintenance, it is also convenient for inspection and maintenance, reducing maintenance costs and difficulty. This embodiment is suitable for the corrosion protection needs of the tubing string in producing wells under different well conditions and corrosion environments. Whether it is a high-corrosion oil and gas field or a low-corrosion oil and gas field, this slotted tubing 1 can provide effective corrosion protection. Finally, while ensuring corrosion protection effect, the design of 4 slits also considers cost factors. By optimizing the number of slits, not only the corrosion protection effect is achieved, but also the manufacturing cost is reduced, improving the overall economic benefit.

[0027] Optionally, the annular inner-flower-shaped heterogeneous structure is provided with at least four evenly distributed inner-flower-shaped protrusions. The design of the inner-flower-shaped protrusions can increase the surface area of the heterogeneous sacrificial anode protective layer 3, thereby enhancing the contact area with the corrosion environment in the well. This design is conducive to more efficiently dispersing and slowing down the electrochemical corrosion effect, thereby significantly improving the corrosion protection effect. Moreover, the at least four evenly distributed inner-flower-shaped protrusions can ensure that the annular inner-flower-shaped heterogeneous structure maintains uniform stress when subjected to complex environments such as well pressure, temperature, and corrosion, preventing local stress concentration. This design improves the overall stability and durability of the structure. In addition, the inner-flower-shaped protrusions can improve the fluid dynamics performance inside the tubing, reducing turbulence and vortex phenomena of the fluid in the tubing. This not only helps to reduce the impact and corrosion of the fluid on the tubing, but also helps to improve the delivery efficiency of the tubing. Furthermore, the present embodiment is suitable for the corrosion protection needs of the production well tubing string in different well conditions and corrosion environments. Whether it is a highly corrosive oil and gas field or a low-corrosive oil and gas field, this inner-flower-shaped heterogeneous structure can provide effective corrosion protection. Finally, the present embodiment is relatively simple in the manufacturing process, easy to process and control. At the same time, during maintenance, due to the self-cleaning effect of the inner-flower-shaped protrusions, the accumulation of sediments and dirt can be reduced, reducing the difficulty and cost of maintenance.

[0028] Optionally, the slope is provided with a threaded structure to connect with the joint 4. Through threaded connection, the joint 4 and the slope can form a tight and stable connection. This connection method can provide higher connection strength, effectively prevent loosening or leakage caused by vibration, temperature change or pressure fluctuation, and thus ensure the stability and reliability of the production well tubing string system. Moreover, threaded connection has the characteristics of simplicity, making the installation and disassembly process very convenient. Workers only need to use the corresponding tools and follow the specified operation steps to rotate to realize connection or separation, greatly improving the work efficiency. In addition, due to the excellent stability and reliability of threaded connection, equipment failures and downtime caused by connection problems can be reduced. This helps to reduce maintenance costs and improve the overall operation efficiency of the equipment. In addition, through threaded connection, the joint 4 and the slope can achieve a tight connection without gaps, effectively preventing the leakage of well fluids or gases. This not only helps to protect the environment and the safety of workers, but also avoids production accidents and economic losses caused by leakage. Finally, threaded connection is a widely used connection method with good universality and adaptability. This means that the design scheme can be applied to different specifications and types of production well tubing string systems, meeting the needs of various complex environments and working conditions.

[0029] Optionally, the special-shaped sacrificial anode protective layer 3 and the slotted oil pipe 1 are fixed by metallurgical bonding to form an integrated structure. Metallurgical bonding is a high-strength connection method that can ensure a tight and secure connection between the special-shaped sacrificial anode protective layer 3 and the slotted oil pipe 1. The integrated structure can maintain a high degree of structural stability when subjected to the complex environment within the well, effectively preventing the problem of aggravated corrosion caused by loosening or falling off. In addition, the metallurgical bonding fixation method eliminates the gaps or holes that may exist in traditional connection methods, thereby reducing the possibility of intrusion of corrosive media. This seamless connection enables the special-shaped sacrificial anode protective layer 3 to better play its anti-corrosion role and improve the anti-corrosion effect of the entire production well pipe string. In addition, because the metallurgical bonding fixation method can ensure a tight connection between the special-shaped sacrificial anode protective layer 3 and the slotted oil pipe 1, it can extend the service life of the entire anti-corrosion device. The integrated structure reduces equipment damage and replacement frequency caused by connection problems, reducing maintenance costs and downtime. At the same time, the integrated structure simplifies the installation and maintenance process. Workers need not perform additional fixing or sealing operations at the joints; they simply connect the corrosion inhibitor device to the production well string. This simplified installation process improves work efficiency and reduces operational difficulty. Finally, the metallurgical bonding method ensures a secure connection between the special-shaped sacrificial anode protective layer 3 and the slotted oil pipe 1, reducing safety hazards caused by loose or detached connections. This integrated structure improves the overall safety of the production well string system, ensuring the safety of both personnel and equipment.

[0030] This embodiment also provides a sacrificial anode corrosion protection device, including: a special-shaped sacrificial anode protection layer 3, a pipeline with a slot, an outer casing 2, and a joint 4; the slotted oil pipe 1 is a cylinder with an opening on the pipe wall to transport liquid; the special-shaped sacrificial anode protection layer 3 is wrapped around the outer wall of the slotted oil pipe 1, and bulges at the opening to form a ring-shaped inner flowering special-shaped structure to expand the corrosion area of ​​the special-shaped sacrificial anode protection layer 3; the outer casing 2 is sleeved on the outside of the special-shaped sacrificial anode protection layer 3 to seal the slotted oil pipe 1; the ports at both ends of the outer casing 2 and the slotted oil pipe 1 form a slope to connect with the joint 4; based on the joint 4, the sacrificial anode corrosion protection device is connected to the pipe column to slow down the corrosion of the pipe column through the special-shaped sacrificial anode protection layer 3.

[0031] This embodiment also provides a sacrificial anode corrosion inhibitor device for the production well tubing string including any one of the items in this application.

Claims

1. A sacrificial anode corrosion inhibitor device for a production well pipe string, characterized in that: include: Oil pipe with gap (1), outer casing (2), special-shaped sacrificial anode protective layer (3), joint (4); The oil pipe with slits (1) is a column with openings provided on the pipe wall for transporting well oil; The special-shaped sacrificial anode protective layer (3) is wrapped around the outer wall of the oil pipe with slits (1) and bulges at the opening to form a ring-shaped inner-flowering special-shaped structure; The outer sleeve (2) is sleeved outside the special-shaped sacrificial anode protective layer (3) to seal the oil pipe with a gap (1); The ports at both ends of the outer casing (2) and the oil pipe with slits (1) form slopes to connect with the joint (4); The sacrificial anode corrosion inhibitor device is connected to the production well pipe string based on the joint (4), so as to slow down the corrosion of the production well pipe string through the special-shaped sacrificial anode protective layer (3).

2. The sacrificial anode corrosion inhibitor device for the production well pipe string according to claim 1, characterized in that: The slotted oil pipe (1) is provided with slots evenly distributed along the axial direction and having a width of 8 to 12 mm, so that the contact area between the inner wall of the slotted oil pipe and the well oil is reduced through the 8 to 12 mm slots, thereby slowing down the corrosion rate of the special-shaped sacrificial anode protective layer (3).

3. The sacrificial anode corrosion inhibitor device for the production well pipe string according to claim 1, characterized in that: The slotted oil pipe (1) is provided with 3 to 6 slots inside, so that the contact area between the inner wall of the slotted oil pipe and the well oil is reduced through the 3 to 6 slots, thereby slowing down the corrosion rate of the special-shaped sacrificial anode protective layer (3).

4. The sacrificial anode corrosion inhibitor device for a production well pipe string according to claim 1, characterized in that: The slotted oil pipe (1) is provided with slots of 10 mm width uniformly distributed along the axial direction, so that the contact area between the inner wall of the slotted oil pipe and the well oil is reduced through the 10 mm slots, thereby slowing down the corrosion rate of the special-shaped sacrificial anode protective layer (3).

5. The sacrificial anode corrosion inhibitor device for a production well pipe string according to claim 1, characterized in that: Four slits are provided inside the slotted oil pipe (1), so that the contact area between the inner wall of the slotted oil pipe and the well oil is reduced through the four slits, thereby slowing down the corrosion rate of the special-shaped sacrificial anode protective layer (3).

6. The sacrificial anode corrosion inhibitor device for a production well pipe string according to claim 1, characterized in that: The annular inner-flowering special-shaped structure is provided with at least four evenly distributed inner-flowering protrusions.

7. The sacrificial anode corrosion inhibitor device for a production well pipe string according to claim 1, characterized in that: A threaded structure is provided on the slope to be connected to the thread of the joint (4).

8. The sacrificial anode corrosion inhibitor device for a production well pipe string according to claim 1, characterized in that: The special-shaped sacrificial anode protective layer (3) and the oil pipe with slits (1) are fixed by metallurgical bonding to form an integrated structure.

9. A sacrificial anode corrosion inhibitor for a production well pipe, characterized in that: include: Special-shaped sacrificial anode protective layer, pipeline with gaps, outer casing, and joints; The slit pipeline is a column with openings on the wall for transporting liquid; The special-shaped sacrificial anode protection layer is wrapped around the outer wall of the pipeline with a gap and bulges at the opening to form a ring-shaped inner-flowering special-shaped structure, thereby expanding the corrosion area of ​​the special-shaped sacrificial anode protection layer; The outer sleeve is sleeved outside the special-shaped sacrificial anode protection layer to seal the pipeline with gaps; The outer sleeve and the ports at both ends of the slit pipeline form a slope to connect with the joint; The sacrificial anode corrosion inhibitor device is connected to the production well pipe string based on the joint, so that the corrosion of the production well pipe string is slowed down by the special-shaped sacrificial anode protective layer.

10. A sacrificial anode corrosion inhibitor system for a production well pipe string, characterized in that: The invention comprises the sacrificial anode corrosion inhibitor device for the production well pipe string according to any one of claims 1 to 8.

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