Anti-corrosion sucker rod with coating layer

Abstract

The utility model discloses an anti-corrosion sucker rod with a coating layer, which belongs to the technical field of sucker rods and comprises a first sucker rod body, a second sucker rod body is arranged at one end of the first sucker rod body, and a reinforcing mechanism is arranged between the first sucker rod body and the second sucker rod body. Anti-corrosion assemblies are arranged on the surfaces of the first sucker rod bodies and the second sucker rod bodies, the multiple sets of first sucker rod bodies and second sucker rod bodies can be combined with one another, disassembly, assembly and combination are convenient, the first sucker rod bodies and the second sucker rod bodies can be reinforced and fixed through internal reinforcing rings, the phenomenon of damage in the using process is prevented, and the service life of the sucker rod is prolonged. The corrosion resistance of steel can be improved, basic anti-corrosion protection is provided for the sucker rod, the anti-corrosive primer layer has excellent anti-corrosion performance, a compact protective film can be formed on the metal surface, a corrosive medium is effectively isolated, and the anti-corrosion coating has excellent chemical corrosion resistance and abrasion resistance and can effectively prevent corrosion of the sucker rod. The corrosion of corrosive media such as oil, water and gas in an oil well can be resisted.

Description

Technical Field

[0001] The utility model relates to the technical field of sucker rods, in particular to a coating layer anti-corrosion sucker rod. Background Art

[0002] During oilfield production operations, the sucker rod is in direct contact with corrosive media, which can easily cause corrosion, eccentric wear, breakage and other problems, increasing the operation frequency and production costs. By coating the outer surface of the sucker rod with a layer of anti-corrosion material, the contact between the sucker rod and the corrosive medium can be effectively blocked, avoiding corrosion on the surface of the sucker rod, thereby extending the service life of the sucker rod.

[0003] The sucker rods currently on the market are of an integrated structure. Therefore, when the sucker rod is partially damaged, the operator needs to replace the entire sucker rod, which is a complicated operation.

[0004] The existing patent (Announcement No.: CN216381244U) is a coated anti-corrosion sucker rod. When any one of the top rod, connecting rod and bottom rod is damaged, the operator can separate multiple pipes by rotating them for replacement. The operation is simple. The top end of the top rod and the bottom end of the bottom rod are fixedly connected with connecting rings, which makes it more convenient for the operator to make external connections. The outer layer is made of fiberglass, which has good corrosion resistance and can extend the service life of the connecting rod.

[0005] In view of the above problems, existing patents have provided solutions. However, when the existing sucker rods are used in harsh environments, there is a lack of reinforcement for the sucker rods themselves, which can easily cause damage to the sucker rods themselves during use, and the sucker rods themselves are susceptible to corrosion during long-term use.

[0006] Therefore, a coating layer anti-corrosion sucker rod is proposed. Utility Model Content

[0007] The purpose of the utility model is to provide a coating anti-corrosion sucker rod, which can solve the problem that when the existing sucker rod is used in a harsh environment, the sucker rod itself is lacking in reinforcement, which easily causes damage to the sucker rod itself during use, and the sucker rod itself is easily corroded during long-term use.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a coating layer anti-corrosion sucker rod, comprising a first sucker rod body, a second sucker rod body is arranged at one end of the first sucker rod body, a reinforcement mechanism is arranged between the first sucker rod body and the second sucker rod body, and anti-corrosion components are arranged on the surfaces of the first sucker rod body and the second sucker rod body;

[0009] The reinforcement mechanism includes a connecting block, a connecting slot, a reinforcement ring, a fastening bolt and a sealing ring. The connecting block is fixedly arranged at one end of the first sucker rod body, the connecting slot is opened at one end of the second sucker rod body, the connecting block and the connecting slot correspond to each other, the reinforcement ring is arranged at the bottom end of the second sucker rod body, the fastening bolt is arranged at the bottom end of the second sucker rod body and connects the reinforcement ring and the second sucker rod body to each other, and the sealing ring is arranged at the connection between the first sucker rod body and the second sucker rod body.

[0010] Preferably, the anti-corrosion component includes a base rod layer, an anti-rust primer layer, an anti-corrosion coating, an impact-resistant layer, a wear-resistant layer and an outer protective layer, the base rod layer is arranged on the outside of the first sucker rod body and the second sucker rod body, the anti-rust primer layer is arranged on the outside of the base rod layer, the anti-corrosion coating is arranged on the outside of the anti-rust primer layer, the anti-impact layer is arranged on the outside of the wear-resistant layer, and the outer protective layer is arranged on the outside of the wear-resistant layer.

[0011] Preferably, the base rod layer is made of high-strength alloy steel material and is connected to the first sucker rod body and the second sucker rod body. The base rod layer can improve the corrosion resistance of the steel and provide basic anti-corrosion protection for the sucker rod.

[0012] Preferably, the anti-rust primer layer adopts epoxy zinc-rich primer and is interconnected with the base rod layer. The anti-rust primer layer has excellent anti-corrosion performance and can form a dense protective film on the metal surface to effectively isolate the corrosive medium. The presence of zinc powder can also provide electrochemical protection to further improve the anti-corrosion effect.

[0013] Preferably, the anti-corrosion coating is made of polyurethane material and is interconnected with the anti-rust primer layer. The anti-corrosion coating has excellent chemical corrosion resistance and wear resistance, can resist erosion by corrosive media such as oil, water, and gas in oil wells, and provide long-term anti-corrosion protection for the sucker rod.

[0014] Preferably, the impact-resistant layer is made of rubber material and is interconnected with the anti-corrosion coating. The impact-resistant layer has good impact resistance and shock absorption, can reduce the impact and vibration of the sucker rod during operation, reduce the risk of fatigue damage, and can also provide certain anti-corrosion protection, thereby increasing the service life of the sucker rod.

[0015] Preferably, the wear-resistant layer is made of a polymer wear-resistant material and is connected to the impact-resistant layer. The wear-resistant layer has extremely high wear resistance and scratch resistance and can protect the sucker rod from damage due to friction and scratching.

[0016] Preferably, the outer protective layer is made of polytetrafluoroethylene material and is interconnected with the wear-resistant layer. The outer protective layer has extremely high chemical corrosion resistance and weather resistance, and can form a solid protective film on the outermost layer of the sucker rod to further isolate the corrosive medium and ensure the long-term stable operation of the sucker rod. It also has good non-stickiness and self-lubricating properties, and can reduce the friction resistance of the sucker rod during operation.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. By setting up a reinforcement mechanism, the present application can combine multiple groups of first sucker rod bodies and second sucker rod bodies to facilitate disassembly and assembly. At the same time, the internal reinforcement ring can also strengthen and fix the first sucker rod body and the second sucker rod body to prevent damage during use.

[0019] 2. In the present application, by setting up anti-corrosion components, the base rod layer can improve the corrosion resistance of steel and provide basic anti-corrosion protection for the sucker rod. The anti-rust primer layer has excellent anti-corrosion performance and can form a dense protective film on the metal surface to effectively isolate the corrosive medium. The anti-corrosion coating has excellent chemical corrosion resistance and wear resistance, and can resist the erosion of corrosive media such as oil, water, and gas in the oil well. The impact-resistant layer has good impact resistance and shock absorption, and can reduce the impact and vibration of the sucker rod during operation. The wear-resistant layer has extremely high wear resistance and scratch resistance, and can protect the sucker rod from damage due to friction and scratching. The outer protective layer has extremely high chemical corrosion resistance and weather resistance, and can form a solid protective film on the outermost layer of the sucker rod, further isolating the corrosive medium and ensuring the long-term stable operation of the sucker rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is the overall structural view of the utility model;

[0022] Figure 2 This is the overall side structural view of the utility model;

[0023] Figure 3 This is an overall cross-sectional structural view of the utility model;

[0024] Figure 4 It is a partial cross-sectional view of the overall structure of the utility model;

[0025] Figure 5 It is an overall partial cross-sectional structural view of the utility model.

[0026] Description of reference numerals:

[0027] 1. First sucker rod body; 2. Second sucker rod body; 3. Reinforcement mechanism; 4. Anti-corrosion component; 301. Connecting plug block; 302. Connecting slot; 303. Reinforcement ring; 304. Fastening bolt; 305. Sealing ring; 401. Base rod layer; 402. Anti-rust primer layer; 403. Anti-corrosion coating; 404. Impact-resistant layer; 405. Wear-resistant layer; 406. Outer protective layer. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figures 1 to 5 , the utility model provides a technical solution:

[0030] A coating layer anti-corrosion sucker rod, comprising a first sucker rod body 1, a second sucker rod body 2 is arranged at one end of the first sucker rod body 1, a reinforcement mechanism 3 is arranged between the first sucker rod body 1 and the second sucker rod body 2, and an anti-corrosion component 4 is arranged on the surfaces of the first sucker rod body 1 and the second sucker rod body 2;

[0031] The reinforcement mechanism 3 includes a connecting block 301, a connecting slot 302, a reinforcement ring 303, a fastening bolt 304 and a sealing ring 305. The connecting block 301 is fixedly arranged at one end of the first sucker rod body 1, the connecting slot 302 is opened at one end of the second sucker rod body 2, the connecting block 301 and the connecting slot 302 correspond to each other, the reinforcement ring 303 is arranged at the bottom end of the second sucker rod body 2, the fastening bolt 304 is arranged at the bottom end of the second sucker rod body 2 and connects the reinforcement ring 303 and the second sucker rod body 2 to each other, and the sealing ring 305 is arranged at the connection between the first sucker rod body 1 and the second sucker rod body 2.

[0032] By setting up the reinforcement mechanism 3, in actual application, multiple groups of first sucker rod bodies 1 and second sucker rod bodies 2 can be combined with each other to facilitate disassembly and assembly. At the same time, the internal reinforcement ring 303 can also strengthen and fix the first sucker rod body 1 and the second sucker rod body 2 to prevent damage during use.

[0033] Specifically, Figure 3As shown, the anti-corrosion component 4 includes a base rod layer 401, an anti-rust primer layer 402, an anti-corrosion coating 403, an impact-resistant layer 404, a wear-resistant layer 405 and an outer protective layer 406. The base rod layer 401 is arranged on the outside of the first sucker rod body 1 and the second sucker rod body 2, the anti-rust primer layer 402 is arranged on the outside of the base rod layer 401, the anti-corrosion coating 403 is arranged on the outside of the anti-rust primer layer 402, the impact-resistant layer 404 is arranged on the outside of the wear-resistant layer 405, and the outer protective layer 406 is arranged on the outside of the wear-resistant layer 405.

[0034] Specifically, Figure 3 As shown, the base rod layer 401 is made of high-strength alloy steel material and is connected to the first sucker rod body 1 and the second sucker rod body 2. The base rod layer 401 can improve the corrosion resistance of the steel and provide basic anti-corrosion protection for the sucker rod.

[0035] Specifically, Figure 3 As shown, the anti-rust primer layer 402 adopts epoxy zinc-rich primer and is interconnected with the base rod layer 401. The anti-rust primer layer 402 has excellent anti-corrosion performance and can form a dense protective film on the metal surface to effectively isolate the corrosive medium. The presence of zinc powder can also provide electrochemical protection to further improve the anti-corrosion effect.

[0036] Specifically, Figure 3 As shown, the anti-corrosion coating 403 is made of polyurethane material and is interconnected with the anti-rust primer layer 402. The anti-corrosion coating 403 has excellent chemical corrosion resistance and wear resistance, and can resist the erosion of corrosive media such as oil, water, and gas in the oil well, providing long-term anti-corrosion protection for the sucker rod.

[0037] Specifically, Figure 3 As shown, the impact-resistant layer 404 is made of rubber material and is interconnected with the anti-corrosion coating 403. The impact-resistant layer 404 has good impact resistance and shock absorption, which can reduce the impact and vibration of the sucker rod during operation, reduce the risk of fatigue damage, and provide certain anti-corrosion protection to increase the service life of the sucker rod.

[0038] Specifically, Figure 3 As shown, the wear-resistant layer 405 is made of polymer wear-resistant material and is connected to the impact-resistant layer 404. The wear-resistant layer 405 has extremely high wear resistance and scratch resistance, and can protect the sucker rod from damage during friction and scratching.

[0039] Specifically, Figure 3As shown, the outer protective layer 406 is made of polytetrafluoroethylene material and is interconnected with the wear-resistant layer 405. The outer protective layer 406 has extremely high chemical corrosion resistance and weather resistance, and can form a solid protective film on the outermost layer of the sucker rod to further isolate the corrosive medium and ensure the long-term stable operation of the sucker rod. It also has good non-stickiness and self-lubricating properties, which can reduce the friction resistance of the sucker rod during operation.

[0040] By setting the anti-corrosion component 4, the base rod layer 401 can improve the corrosion resistance of the steel and provide basic anti-corrosion protection for the sucker rod. The anti-rust primer layer 402 has excellent anti-corrosion performance and can form a dense protective film on the metal surface to effectively isolate the corrosive medium. The presence of zinc powder can also provide electrochemical protection to further improve the anti-corrosion effect. The anti-corrosion coating 403 has excellent chemical corrosion resistance and wear resistance, and can resist the erosion of corrosive media such as oil, water, and gas in the oil well, providing long-term anti-corrosion protection for the sucker rod. The impact-resistant layer 404 has good impact resistance and shock absorption. It can reduce the impact and vibration of the sucker rod during operation, reduce the risk of fatigue damage, provide certain anti-corrosion protection, and increase the service life of the sucker rod. The wear-resistant layer 405 has extremely high wear resistance and scratch resistance, and can protect the sucker rod from damage during friction and scratching. The outer protective layer 406 has extremely high chemical corrosion resistance and weather resistance, and can form a solid protective film on the outermost layer of the sucker rod to further isolate the corrosive medium and ensure the long-term stable operation of the sucker rod. It also has good non-stickiness and self-lubricating properties, and can reduce the friction resistance of the sucker rod during operation.

[0041] By adopting the above technical solution, the problem that the existing sucker rod lacks reinforcement when used in harsh environments, which easily causes damage to the sucker rod itself during use, and the sucker rod itself is easily corroded during long-term use is solved.

[0042] Working principle: When the present application is used, firstly, multiple groups of first sucker rod bodies 1 and second sucker rod bodies 2 are combined with each other, and the internal reinforcement ring 303 can also strengthen and fix the first sucker rod body 1 and the second sucker rod body 2. The base rod layer 401 can improve the corrosion resistance of the steel and provide basic anti-corrosion protection for the sucker rod. The anti-rust primer layer 402 has excellent anti-corrosion performance and can form a dense protective film on the metal surface to effectively isolate the corrosive medium. The presence of zinc powder can also provide electrochemical protection, further improving the anti-corrosion effect. The coating 403 has excellent chemical corrosion resistance and wear resistance, the impact-resistant layer 404 has good impact resistance and shock absorption, which can reduce the impact and vibration of the sucker rod during operation and reduce the risk of fatigue damage. It can also provide certain anti-corrosion protection and increase the service life of the sucker rod. The wear-resistant layer 405 has extremely high wear resistance and scratch resistance, and can protect the sucker rod from damage due to friction and scratching. The outer protective layer 406 has extremely high chemical corrosion resistance and weather resistance, and can form a solid protective film on the outermost layer of the sucker rod.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A coating layer anti-corrosion sucker rod, comprising a first sucker rod body (1), characterized in that: A second sucker rod body (2) is disposed at one end of the first sucker rod body (1), a reinforcement mechanism (3) is disposed between the first sucker rod body (1) and the second sucker rod body (2), and anti-corrosion components (4) are disposed on the surfaces of the first sucker rod body (1) and the second sucker rod body (2); The reinforcement mechanism (3) comprises a connecting block (301), a connecting slot (302), a reinforcement ring (303), a fastening bolt (304) and a sealing ring (305); the connecting block (301) is fixedly arranged at one end of the first sucker rod body (1); the connecting slot (302) is opened at one end of the second sucker rod body (2); the connecting block (301) and the connecting slot (302) correspond to each other; the reinforcement ring (303) is arranged at one end of the bottom of the second sucker rod body (2); the fastening bolt (304) is arranged at the bottom end of the second sucker rod body (2) and connects the reinforcement ring (303) and the second sucker rod body (2) to each other; and the sealing ring (305) is arranged at the connection between the first sucker rod body (1) and the second sucker rod body (2).

2. The coating anti-corrosion sucker rod according to claim 1, characterized in that: The anti-corrosion component (4) comprises a base rod layer (401), an anti-rust primer layer (402), an anti-corrosion coating (403), an impact-resistant layer (404), a wear-resistant layer (405) and an outer protective layer (406); the base rod layer (401) is arranged on the outer sides of the first sucker rod body (1) and the second sucker rod body (2); the anti-rust primer layer (402) is arranged on the outer sides of the base rod layer (401); the anti-corrosion coating (403) is arranged on the outer sides of the anti-rust primer layer (402); the impact-resistant layer (404) is arranged on the outer sides of the wear-resistant layer (405); and the outer protective layer (406) is arranged on the outer sides of the wear-resistant layer (405).

3. The coating anti-corrosion sucker rod according to claim 2, characterized in that: The base rod layer (401) is made of high-strength alloy steel material and is connected to the first sucker rod body (1) and the second sucker rod body (2). The base rod layer (401) can improve the corrosion resistance of the steel material and provide basic anti-corrosion protection for the sucker rod.

4. The coating anti-corrosion sucker rod according to claim 2, characterized in that: The anti-rust primer layer (402) is made of epoxy zinc-rich primer and is connected to the base rod layer (401).

5. The coating anti-corrosion sucker rod according to claim 2, characterized in that: The anti-corrosion coating (403) is made of polyurethane material and is connected to the anti-rust primer layer (402).

6. The coating anti-corrosion sucker rod according to claim 2, characterized in that: The impact-resistant layer (404) is made of rubber material and is connected to the anti-corrosion coating (403).

7. The coating anti-corrosion sucker rod according to claim 2, characterized in that: The wear-resistant layer (405) is made of a polymer wear-resistant material and is connected to the impact-resistant layer (404).

8. The coating-layer anti-corrosion sucker rod according to claim 2, characterized in that: The outer protective layer (406) is made of polytetrafluoroethylene material and is interconnected with the wear-resistant layer (405).

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