Anti-scale hollow sucker rod for water seepage of oil well

Abstract

The utility model discloses an anti-scale hollow sucker rod for water seepage of an oil well, which belongs to the technical field of oil production engineering and comprises a sucker rod body, and an anti-seepage mechanism for preventing water from seeping into the sucker rod body is arranged in the sucker rod body. Comprising an anti-scaling layer, a lubricating layer, an anti-corrosion layer, a sealing layer, a wear-resistant layer, an impermeable layer and an anti-fatigue layer, the anti-scaling layer is arranged on the inner wall of a sucker rod body, and the lubricating layer is arranged outside the anti-scaling layer; when the anti-seepage sucker rod is used, the anti-seepage mechanism can provide the effects of preventing incrustation scale attachment, increasing the fluid moving speed, preventing the sucker rod body from being corroded, keeping the sucker rod body dry, preventing water seepage, achieving the wear-resisting effect and improving the wear resistance of the sucker rod body for the sucker rod body, and the service life of the sucker rod body is greatly prolonged; damage caused by long-time operation of the sucker rod body is prevented, the maintenance cost is reduced, and meanwhile the oil pumping efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil production engineering, in particular to an oil well water seepage and scale prevention hollow pumping rod. Background Art

[0002] The sucker rod is a slender rod of the pumping well. It is connected to the bare rod at the top and the oil pump at the bottom to transmit power. In the process of oil extraction, the water seepage problem of oil wells has always been one of the key factors affecting the extraction efficiency and the service life of equipment. Water seepage will not only dilute the liquid in the oil well and reduce the quality of crude oil, but may also cause equipment corrosion and blockage, increasing maintenance costs. In addition, with the extension of extraction time, the scaling problem in the oil well is becoming more and more serious. Scaling will not only affect the pumping efficiency of the sucker rod, but also may cause equipment failure and safety hazards. Therefore, a sucker rod that can prevent water seepage and scaling is needed.

[0003] At present, the anti-wear, anti-corrosion, anti-scaling and anti-wax of sucker rods are mostly technical countermeasures with single functional effectiveness, and there are no tools or methods to achieve comprehensive management of anti-wear, anti-corrosion, anti-wax and anti-scaling. For example, the anti-corrosion of sucker rods can only achieve the anti-corrosion effect, but cannot take into account the anti-wear, anti-wax and anti-scaling at the same time, which leads to the common problem that technical countermeasures often have the problem of losing one thing while focusing on another;

[0004] The existing patent (Announcement No.: CN208534426U) is a wear-resistant, corrosion-resistant, wax-resistant and scale-resistant sucker rod. By wrapping a layer of polymer polyethylene on the outside of the sucker rod, the rigid contact between the sucker pipe and the rod during oil well production is changed to a tough composite contact between the sucker pipe, the polymer polyethylene layer and the sucker rod. Due to the wear resistance of the polymer polyethylene material and the physical properties of the polymer polyethylene coating layer such as smooth surface and poor adhesion, the sucker rod can be protected from wear while taking into account the effects of corrosion, wax and scale. This provides a comprehensive prevention and control method for improving the production contradictions of directional wells and high-angle wells with high corrosion, wax and scale wellbore characteristics, such as eccentric wear and breakage of pipes and rods, and high frequency of maintenance operations.

[0005] In view of the above problems, existing patents have provided solutions, but they cannot provide water-proof function for sucker rods when in use, which will cause the liquid in the oil well to be diluted, reduce the quality of crude oil, and may also cause equipment corrosion and blockage, increasing maintenance costs, so they still need to be improved.

[0006] Therefore, a hollow sucker rod for preventing water seepage and scaling in oil wells is proposed. Utility Model Content

[0007] The purpose of the utility model is to provide an oil well water seepage and scale prevention hollow sucker rod, which can solve the problem that the existing oil well water seepage and scale prevention hollow sucker rod cannot provide the sucker rod with the water seepage prevention function when in use, which will cause the liquid in the oil well to be diluted, reduce the quality of crude oil, and may also cause equipment corrosion and blockage, increasing maintenance costs.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an oil well water seepage and scale prevention hollow sucker rod, comprising a sucker rod body, wherein the inside of the sucker rod body is provided with an anti-penetration mechanism for preventing water from penetrating into the inside of the sucker rod body;

[0009] The anti-permeation mechanism includes an anti-scaling layer, a lubricating layer, an anti-corrosion layer, a sealing layer, a wear-resistant layer, an anti-seepage layer and an anti-fatigue layer. The anti-scaling layer is arranged on the inner wall of the sucker rod body, the lubricating layer is arranged on the outside of the anti-scaling layer, the anti-corrosion layer is arranged on the outer wall of the sucker rod body, the sealing layer is arranged on the outer wall of the anti-corrosion layer, the wear-resistant layer is arranged on the outer wall of the sealing layer, the anti-seepage layer is arranged on the outer wall of the wear-resistant layer, and the anti-fatigue layer is arranged on the outer wall of the anti-seepage layer.

[0010] Preferably, the anti-scaling layer is made of a polymer coating, and the anti-scaling layer is fixed to the inner wall of the sucker rod body by thermal spraying. The anti-scaling layer is used to prevent salts and scale in the oil well from accumulating on the inner wall of the sucker rod body, reduce scale clogging, and improve oil production efficiency.

[0011] Preferably, the lubricating layer is made of polytetrafluoroethylene, the lubricating layer is bonded to the anti-fouling layer, and the lubricating layer is used to reduce the resistance of the fluid during the flow process and improve the oil pumping efficiency.

[0012] Preferably, the anti-corrosion layer is made of a ceramic coating, and the anti-corrosion layer is fixed to the outer wall of the sucker rod body by thermal spraying. The anti-corrosion layer is used to prevent salts and chemicals from corroding the sucker rod body, thereby extending the service life of the sucker rod body.

[0013] Preferably, the sealing layer is made of a polymer material, the sealing layer is bonded to the anti-corrosion layer, and the sealing layer is used to prevent water from seeping from the bottom of the well from entering the inside of the sucker rod body, thereby keeping the sucker rod body dry and clean.

[0014] Preferably, the wear-resistant layer is made of silicon carbide material, the wear-resistant layer is bonded to the sealing layer, and the wear-resistant layer is used to improve the wear resistance of the sucker rod body, reduce contact wear with the well wall, and extend the service life of the sucker rod body.

[0015] Preferably, the anti-seepage layer is made of metal foil material, the anti-seepage layer is bonded to the wear-resistant layer, and the anti-seepage layer is used to prevent moisture and impurities in the oil well from penetrating into the sucker rod body, so as to keep the sucker rod body dry and clean.

[0016] Preferably, the anti-fatigue layer is made of a reinforced fiber material, the anti-fatigue layer is bonded to the anti-seepage layer, and the anti-fatigue layer is used to enhance the tensile strength and durability of the sucker rod body.

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

[0018] 1. The present application is provided with an anti-seepage mechanism, which, when in use, can provide the sucker rod body with the effects of preventing scale adhesion, increasing the fluid movement speed, preventing the sucker rod body from being corroded, keeping the sucker rod body dry, preventing water penetration, and providing wear-resistant effects and improving the wear resistance of the sucker rod body, thereby greatly increasing the service life of the sucker rod body, preventing the sucker rod body from being damaged due to long-term operation, reducing maintenance costs, and also improving the efficiency of oil pumping. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 This is the overall structural view of the utility model;

[0021] Figure 2 It is a left view of the utility model;

[0022] Figure 3 For this utility model Figure 2 The three-dimensional cross-section view at AA in the middle;

[0023] Figure 4 For this utility model Figure 3 The enlarged view of point A in the middle;

[0024] Figure 5 For this utility model Figure 3 Enlarged view of point B in the middle.

[0025] Description of reference numerals:

[0026] 1. Sucker rod body; 2. Anti-seepage mechanism; 201. Anti-scaling layer; 202. Lubricating layer; 203. Anti-corrosion layer; 204. Sealing layer; 205. Wear-resistant layer; 206. Anti-seepage layer; 207. Anti-fatigue layer. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figures 1 to 5 , the utility model provides a technical solution:

[0029] An oil well water seepage and scale prevention hollow sucker rod comprises a sucker rod body 1, wherein the inside of the sucker rod body 1 is provided with an anti-seepage mechanism 2 for preventing water from penetrating into the inside of the sucker rod body 1;

[0030] The anti-permeation mechanism 2 includes an anti-scaling layer 201, a lubricating layer 202, an anti-corrosion layer 203, a sealing layer 204, a wear-resistant layer 205, an anti-seepage layer 206 and an anti-fatigue layer 207. The anti-scaling layer 201 is arranged on the inner wall of the sucker rod body 1, the lubricating layer 202 is arranged on the outside of the anti-scaling layer 201, the anti-corrosion layer 203 is arranged on the outer wall of the sucker rod body 1, the sealing layer 204 is arranged on the outer wall of the anti-corrosion layer 203, the wear-resistant layer 205 is arranged on the outer wall of the sealing layer 204, the anti-seepage layer 206 is arranged on the outer wall of the wear-resistant layer 205, and the anti-fatigue layer 207 is arranged on the outer wall of the anti-seepage layer 206.

[0031] Specifically, Figure 4 As shown, the anti-scaling layer 201 is made of a polymer coating and is fixed to the inner wall of the sucker rod body 1 by thermal spraying. The anti-scaling layer 201 is used to prevent salts and scale in the oil well from accumulating on the inner wall of the sucker rod body 1, reduce scale clogging, and improve oil production efficiency.

[0032] Specifically, Figure 4 As shown, the lubricating layer 202 is made of polytetrafluoroethylene, and the lubricating layer 202 is bonded to the anti-fouling layer 201. The lubricating layer 202 is used to reduce the resistance of the fluid during the flow process and improve the oil pumping efficiency.

[0033] Specifically, Figure 5 As shown, the anti-corrosion layer 203 is made of a ceramic coating and is fixed to the outer wall of the sucker rod body 1 by thermal spraying. The anti-corrosion layer 203 is used to prevent salts and chemicals from corroding the sucker rod body 1 and extend the service life of the sucker rod body 1.

[0034] Specifically, Figure 5 As shown, the sealing layer 204 is made of polymer material, and the sealing layer 204 is bonded to the anti-corrosion layer 203 . The sealing layer 204 is used to prevent water from seeping from the bottom of the well from entering the inside of the sucker rod body 1 , so as to keep the sucker rod body 1 dry and clean.

[0035] Specifically, Figure 5 As shown, the wear-resistant layer 205 is made of silicon carbide material, and the wear-resistant layer 205 is bonded to the sealing layer 204 . The wear-resistant layer 205 is used to improve the wear resistance of the sucker rod body 1 , reduce the contact wear with the well wall, and extend the service life of the sucker rod body 1 .

[0036] Specifically, Figure 5 As shown, the anti-seepage layer 206 is made of metal foil material, and the anti-seepage layer 206 is bonded to the wear-resistant layer 205. The anti-seepage layer 206 is used to prevent moisture and impurities in the oil well from penetrating into the sucker rod body 1, so as to keep the sucker rod body 1 dry and clean.

[0037] Specifically, Figure 5 As shown, the anti-fatigue layer 207 is made of reinforced fiber material, and the anti-fatigue layer 207 is bonded to the anti-seepage layer 206 . The anti-fatigue layer 207 is used to enhance the tensile strength and durability of the sucker rod body 1 .

[0038] When in use, the sucker rod body 1 is installed at a required location. When pumping oil, the anti-scaling layer 201 made of the polymer coating can prevent salts and scale in the oil well from accumulating on the inner wall of the sucker rod body 1, reduce scale clogging, and improve oil production efficiency. The lubricating layer 202 made of polytetrafluoroethylene can reduce the resistance of the fluid during flow and improve oil pumping efficiency. Then the anti-corrosion layer 203 made of the ceramic coating can prevent salts and chemicals from corroding the sucker rod body 1 and extend the service life of the sucker rod body 1. The sealing layer 204 made of polymer material can prevent water from seeping from the bottom of the well from entering the inside of the sucker rod body 1. Keep the sucker rod body 1 dry and clean, the wear-resistant layer 205 made of silicon carbide can improve the wear resistance of the sucker rod body 1, reduce the contact wear with the well wall, and extend the service life of the sucker rod body 1, the anti-seepage layer 206 made of metal foil can prevent moisture and impurities in the oil well from penetrating into the sucker rod body 1, and keep the sucker rod body 1 dry and clean, and the anti-fatigue layer 207 made of final reinforced fiber material can enhance the tensile strength and durability of the sucker rod body 1. The coordinated use of the above-mentioned layers can greatly improve the strength and anti-water seepage effect of the sucker rod body 1, and reduce the maintenance cost.

[0039] By adopting the above technical solution, the problem that the existing hollow sucker rod for preventing water seepage and scaling in oil wells cannot provide the function of preventing water seepage for the sucker rod when in use is solved, which will cause the liquid in the oil well to be diluted, reduce the quality of crude oil, and may also cause equipment corrosion and blockage, thereby increasing maintenance costs.

[0040] Working principle: When in use, install the sucker rod body 1 where it needs to be installed. When pumping oil, the anti-scaling layer 201 made of polymer coating can prevent salts and scale in the oil well from accumulating on the inner wall of the sucker rod body 1, reduce scale clogging, and improve oil recovery efficiency. The lubricating layer 202 made of polytetrafluoroethylene can reduce the resistance of the fluid during the flow process and improve the oil pumping efficiency. Then the anti-corrosion layer 203 made of ceramic coating can prevent salts and chemicals from corroding the sucker rod body 1 and extend the service life of the sucker rod body 1. The sealing layer 204 made of polymer material can prevent water from seeping from the bottom of the well from entering the sucker rod body 1 Inside, the sucker rod body 1 is kept dry and clean, the wear-resistant layer 205 made of silicon carbide can improve the wear resistance of the sucker rod body 1, reduce the contact wear with the well wall, and extend the service life of the sucker rod body 1, the anti-seepage layer 206 made of metal foil can prevent moisture and impurities in the oil well from penetrating into the sucker rod body 1, and keep the sucker rod body 1 dry and clean, and finally the anti-fatigue layer 207 made of reinforced fiber material can enhance the tensile strength and durability of the sucker rod body 1. The coordinated use of the above-mentioned layers can greatly improve the strength and anti-water seepage effect of the sucker rod body 1, and reduce the maintenance cost.

[0041] 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 hollow sucker rod for preventing water seepage and scaling in oil wells, comprising a sucker rod body (1), characterized in that: The sucker rod body (1) is provided with an anti-penetration mechanism (2) for preventing water from penetrating into the sucker rod body (1); The anti-permeation mechanism (2) comprises an anti-scaling layer (201), a lubricating layer (202), an anti-corrosion layer (203), a sealing layer (204), a wear-resistant layer (205), an anti-seepage layer (206) and an anti-fatigue layer (207); the anti-scaling layer (201) is arranged on the inner wall of the sucker rod body (1); the lubricating layer (202) is arranged outside the anti-scaling layer (201); the anti-corrosion layer (203) is arranged on the outer wall of the sucker rod body (1); the sealing layer (204) is arranged on the outer wall of the anti-corrosion layer (203); the wear-resistant layer (205) is arranged on the outer wall of the sealing layer (204); the anti-seepage layer (206) is arranged on the outer wall of the wear-resistant layer (205); and the anti-fatigue layer (207) is arranged on the outer wall of the anti-seepage layer (206).

2. The hollow sucker rod for preventing water seepage and scaling in oil wells according to claim 1, characterized in that: The anti-scaling layer (201) is made of a polymer coating and is fixed to the inner wall of the sucker rod body (1) by thermal spraying. The anti-scaling layer (201) is used to prevent salts and scale in the oil well from accumulating on the inner wall of the sucker rod body (1), thereby reducing scale blockage and improving oil recovery efficiency.

3. The hollow sucker rod for preventing water seepage and scaling in oil wells according to claim 1, characterized in that: The lubricating layer (202) is made of polytetrafluoroethylene material. The lubricating layer (202) is bonded to the anti-fouling layer (201). The lubricating layer (202) is used to reduce the resistance of the fluid during the flow process and improve the oil extraction efficiency.

4. The hollow sucker rod for preventing water seepage and scaling in oil wells according to claim 1, characterized in that: The anti-corrosion layer (203) is made of a ceramic coating and is fixed to the outer wall of the sucker rod body (1) by thermal spraying. The anti-corrosion layer (203) is used to prevent salts and chemicals from corroding the sucker rod body (1), thereby extending the service life of the sucker rod body (1).

5. The hollow sucker rod for preventing water seepage and scaling in oil wells according to claim 1, characterized in that: The sealing layer (204) is made of a polymer material and is bonded to the anti-corrosion layer (203). The sealing layer (204) is used to prevent water seepage from the bottom of the well from entering the inside of the sucker rod body (1), thereby keeping the sucker rod body (1) dry and clean.

6. The hollow sucker rod for preventing water seepage and scaling in oil wells according to claim 1, characterized in that: The wear-resistant layer (205) is made of silicon carbide material. The wear-resistant layer (205) is bonded to the sealing layer (204). The wear-resistant layer (205) is used to improve the wear resistance of the sucker rod body (1), reduce contact wear with the well wall, and extend the service life of the sucker rod body (1).

7. The hollow sucker rod for preventing water seepage and scaling in oil wells according to claim 1, characterized in that: The anti-seepage layer (206) is made of metal foil material. The anti-seepage layer (206) is bonded to the wear-resistant layer (205). The anti-seepage layer (206) is used to prevent moisture and impurities in the oil well from penetrating into the sucker rod body (1), thereby keeping the sucker rod body (1) dry and clean.

8. The hollow sucker rod for preventing water seepage and scaling in oil wells according to claim 1, characterized in that: The anti-fatigue layer (207) is made of a reinforced fiber material. The anti-fatigue layer (207) is bonded to the anti-seepage layer (206). The anti-fatigue layer (207) is used to enhance the tensile strength and durability of the sucker rod body (1).

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