Sacrificial anode protection device applied to oil well

Abstract

The sacrificial anode protection device applied to the oil well comprises a carbon steel short section, and the outer wall of the carbon steel short section is connected with a sacrificial anode assembly in a sleeved mode through a buckle connecting piece. Insulating cloth is arranged between the sacrificial anode assembly and the carbon steel short section; conductive components playing a conductive role are symmetrically arranged on the outer wall of the sacrificial anode component, and the end parts of the conductive components are in contact with the inner wall of the pipeline; the sacrificial anode assembly comprises two semi-cylindrical anode materials, and the outer side of the cylinder wall of each anode material is sequentially provided with a filler layer used for providing uniform resistivity and a heat insulation protective layer playing a role in insulation and heat insulation; the anode material is effectively protected by arranging the filler layer and the heat insulation protection layer outside the anode material, and meanwhile, the conductive assembly capable of being elastically adjusted is arranged to be in contact with the inner wall of the pipeline, so that the stability of electrochemical connection between the sacrificial anode and the inner wall of the pipeline is guaranteed, and the protection effect on the anode material is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sacrificial anodes, in particular to a sacrificial anode protection device applied to oil wells. Background Art

[0002] The sacrificial anode is an electrochemical protection method. Its basic principle is to use a metal or alloy with a more negative potential than the protected metal as the anode, which is connected to the protected metal to form a primary battery. In this process, the sacrificial anode (a metal with strong reducing properties) acts as the negative electrode to undergo oxidation reaction and is consumed, while the protected metal acts as the positive electrode to avoid corrosion.

[0003] However, due to the influence of soil resistivity, the reaction between the inner wall of the oil well pipeline and the sacrificial anode is not stable enough, and the sacrificial anode cannot ensure stable contact with the inner wall of the pipeline during consumption, resulting in unstable protection effect.

[0004] In addition, oil wells generally operate in a deep underground environment with poor heat dissipation, and the anode materials currently used are prone to electrode reversal in high-temperature environments, which in turn accelerates the corrosion of the inner wall of the pipeline. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a sacrificial anode protection device applied to oil wells, which can protect the sacrificial anode, ensure the stability of the contact between the sacrificial anode and the inner wall of the pipeline, and improve the protection effect of the sacrificial anode.

[0006] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0007] A sacrificial anode protection device for oil wells comprises a carbon steel nipple, with a sacrificial anode assembly sleeved on the outer wall of the carbon steel nipple via a snap connector; an insulating cloth is provided between the sacrificial anode assembly and the carbon steel nipple; conductive assemblies are symmetrically arranged on the outer wall of the sacrificial anode assembly, with the ends of the conductive assemblies in contact with the inner wall of the pipeline; the sacrificial anode assembly comprises two semi-cylindrical anode materials, with a filler layer for providing uniform resistivity and a thermal insulation protective layer for insulating and heat-isolating purposes sequentially provided on the outer side of the anode material cylinder wall.

[0008] The above-mentioned sacrificial anode protection device applied to oil wells, the conductive component includes a conductive sleeve connected to the anode material, a conductive rod is slidably arranged inside the conductive sleeve, and a spring is arranged between the conductive rod and the inner wall of the conductive sleeve.

[0009] In the above-mentioned sacrificial anode protection device applied to oil wells, the conductive rod and the conductive sleeve are respectively made of ceramic materials.

[0010] The above-mentioned snap connector includes two snap rings arranged symmetrically on the left and right, a snap groove is provided at one end of the connecting part of the two snap rings, and a snap block is provided at the other end of the snap ring to be snapped into the snap groove on the other snap ring, and the snap block and the snap groove are connected by a connecting column.

[0011] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is as follows.

[0012] The utility model provides a sacrificial anode protection device for oil wells, which effectively protects the anode material by arranging a filler layer and a heat-insulating protective layer on the outside of the anode material, thereby ensuring the uniformity of the resistivity during the reaction process and avoiding electrical reversal of the anode material. At the same time, by arranging an elastically adjustable conductive component in contact with the inner wall of the pipeline, the stability of the electrochemical connection between the sacrificial anode and the inner wall of the pipeline is ensured, thereby improving the protective effect of the anode material. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the specific structure of the utility model;

[0014] Figure 2 It is a cross-sectional view of the utility model;

[0015] Figure 3 Based Figure 2 A partial enlarged view of the

[0016] Figure 4 It is a side view of the present utility model.

[0017] Including: 1. Carbon steel nipple, 2. Sacrificial anode assembly, 3. Snap connector, 4. Conductive assembly, 5. Anode material, 6. Insulation cloth, 7. Filling layer, 8. Thermal insulation layer, 9. Conductive sleeve, 10. Conductive rod, 11. Spring, 12. Snap ring, 13. Buckle groove, 14. Snap block, 15. Connecting column. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] A sacrificial anode protection device for oil wells, such as Figures 1 to 4 As shown, it includes a carbon steel pup joint 1, a sacrificial anode assembly 2 is sleeved on the outer wall of the carbon steel pup joint 1 through a snap connector 3, an insulating cloth 6 is provided between the sacrificial anode assembly 2 and the carbon steel pup joint 1, and conductive components 4 are symmetrically provided on the outer wall of the sacrificial anode assembly 2 for conducting electricity, and the ends of the conductive components 4 are in contact with the inner wall of the pipeline.

[0020] The sacrificial anode assembly 2 includes two semi-cylindrical anode materials 5, such as Figure 3As shown, a filler layer 7 and a heat-insulating protective layer 8 are sequentially arranged on the outer side of the anode material 5 cylinder wall.

[0021] The filler layer 7 is filled with a mixture of gypsum powder, bentonite and process sodium sulfate, which can provide a uniform resistivity for the sacrificial anode assembly 2 to determine the protective effect of the anode material.

[0022] The thermal insulation layer 8 is made of corrosion-resistant thermal insulation material, which can ensure that the anode material is less affected by temperature, avoid the electrical reversal of the anode material due to excessive temperature, and prevent the anode material from being exposed to the outside and causing the anode material to be consumed too quickly.

[0023] The snap connector 3 includes two snap rings 12 arranged symmetrically on both sides. Figure 4 As shown, a buckle groove 13 is provided at one end of the connecting portion of the two snap rings 12, and a clamping block 14 is provided at the other end of the snap ring 12 to be clamped with the buckle groove 13 on the other snap ring 12, and the clamping block 14 and the buckle groove 13 are connected by a connecting column 15.

[0024] The conductive component 4 includes a conductive sleeve 9 connected to the anode material 5, and a conductive rod 10 is slidably arranged inside the conductive sleeve 9. A spring 11 is arranged between the conductive rod 10 and the inner wall of the conductive sleeve 9, which can extend the contact time between the conductive rod 10 and the inner wall of the pipeline, so that the anode material 5 and the inner wall of the pipeline are connected through the electrochemical principle to form a circuit relationship during the operation of the oil well, thereby protecting the inner wall of the pipeline from corrosion.

[0025] The conductive rod 10 and the conductive sleeve 9 are both made of ceramic material, which can provide a certain degree of heat insulation while conducting electricity, thereby preventing heat from being transferred to the anode material.

[0026] When in use, first, a layer of insulating cloth 6 is sheathed on the outer wall of the carbon steel short section 1, then the two anode materials are sheathed on the outside of the insulating cloth 6, and the filler layer 7 and the thermal insulation protective layer 8 are laid in sequence to complete the assembly of the sacrificial anode assembly. Finally, the two ends of the sacrificial anode assembly can be fixed by the snap connector 3.

[0027] The utility model provides a sacrificial anode protection device for oil wells, which effectively protects the anode material by arranging a filler layer and a heat-insulating protective layer on the outside of the anode material, thereby ensuring the uniformity of the resistivity during the reaction process and avoiding electrical reversal of the anode material. At the same time, by arranging an elastically adjustable conductive component in contact with the inner wall of the pipeline, the stability of the electrochemical connection between the sacrificial anode and the inner wall of the pipeline is ensured, thereby improving the protective effect of the anode material.

Claims

1. A sacrificial anode protection device for oil wells, characterized by: The invention comprises a carbon steel pup joint (1), wherein a sacrificial anode assembly (2) is sleeved on the outer wall of the carbon steel pup joint (1) via a snap connector (3); an insulating cloth (6) is provided between the sacrificial anode assembly (2) and the carbon steel pup joint (1); conductive assemblies (4) having a conductive function are symmetrically provided on the outer wall of the sacrificial anode assembly (2), and the ends of the conductive assemblies (4) are in contact with the inner wall of the pipeline; the sacrificial anode assembly (2) comprises two semi-cylindrical anode materials (5), and a filler layer (7) for providing uniform resistivity and a heat-insulating protective layer (8) for insulating and heat-isolating functions are sequentially provided on the outer side of the cylinder wall of the anode material (5).

2. The sacrificial anode protection device for oil wells according to claim 1, characterized in that: The conductive component (4) comprises a conductive sleeve (9) connected to the anode material (5), a conductive rod (10) is slidably arranged inside the conductive sleeve (9), and a spring (11) is arranged between the conductive rod (10) and the inner wall of the conductive sleeve (9).

3. The sacrificial anode protection device for oil wells according to claim 2, characterized in that: The conductive rod (10) and the conductive sleeve (9) are respectively made of ceramic materials.

4. The sacrificial anode protection device for oil wells according to claim 1, characterized in that: The snap connector (3) comprises two snap rings (12) arranged symmetrically on both sides, a snap groove (13) being provided at one end of the connecting portion of the two snap rings (12), a snap block (14) being provided at the other end of the snap ring (12) for snapping into the snap groove (13) on the other snap ring (12), and the snap block (14) and the snap groove (13) being connected via a connecting column (15).

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