Anti-corrosion protection device for welded junction of oil field pipeline
By using a combined design of elastic anticorrosion materials and sealing layers at the welding of oil pipelines, the problem of corrosion and wear of welding interfaces is solved, sealing and adaptability are achieved, and the service life of the pipeline is extended.
Patent Information
- Application Number
- CN202421830990.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-07-31
AI Technical Summary
The existing oil pipeline welding interface is prone to corrosion and wear after long-term use, resulting in leakage. The existing anti-corrosion treatment methods have limited anti-corrosion protection life and cannot be continuously conveyed for a long time.
The butt guide pad and conveying guide pad made of elastic anticorrosion materials are designed with a combination of limiting sockets and sealing layers to achieve sealing and sticking cooperation between the front and rear pipes, increasing the sealing and adaptability at the welding and avoiding direct contact corrosion.
It improves the sealing and service life of the pipe welding, ensures normal oil transportation, reduces corrosion and wear at the welding, and extends the service life of the pipe.
Smart Images
Figure CN223137272U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipeline anti-corrosion, in particular to an anti-corrosion protection device for the welded joint of an oilfield pipeline. Background Art
[0002] Oil pipelines are convenient for the long-distance transportation of crude oil extracted from oilfields after processing. Since the existing oil pipelines generally have a long transportation distance, multiple sections of pipelines are welded and spliced to achieve a longer length for transportation. However, at the same time, the welded joints of the pipelines are prone to corrosion and wear. Therefore, anti-corrosion treatment is required. Most of the existing pipeline welded joint treatments are to apply anti-corrosion coatings at the welded joints for anti-corrosion treatment. The service life of the anti-corrosion protection is relatively limited, and it cannot be continuously transported for a long time, which is still likely to cause pipeline leakage. For this reason, we propose an anti-corrosion protection device for the welded joint of an oilfield pipeline. Content of the Utility Model
[0003] The utility model mainly solves the technical problems existing in the above-mentioned prior art, and provides an anti-corrosion protection device for the welded joint of an oilfield pipeline.
[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme: an anti-corrosion protection device for the welded joint of an oilfield pipeline, including a front pipeline and a rear pipeline. A docking guide pad is arranged at the inner wall interface of the front pipeline, and a conveying guide pad that fits with the inner side of the docking guide pad is arranged at the inner wall interface of the rear pipeline. Both the docking guide pad and the conveying guide pad are elliptical hollow structures and are made of elastic anti-corrosion materials. A limiting socket part that is hermetically matched with the docking guide pad is sleeved outside the conveying guide pad. A connecting convex pad is integrally formed around the end of the conveying guide pad. A connecting screw groove is opened inside the limiting socket part, and the inner side of the limiting socket part is in threaded engagement with a second adhesive sealing layer through the connecting screw groove. The second adhesive sealing layer is arranged inside the connecting screw groove.
[0005] Preferably, when the connecting screw groove inside the limiting socket part is in threaded engagement with the connecting convex pad outside the conveying guide pad, the limiting socket part and the conveying guide pad are in a sealed and adhesive state through the second adhesive sealing layer.
[0006] Preferably, when the front pipeline and the rear pipeline are docked with each other, the inner side of the docking guide pad and the periphery of the conveying guide pad are in a mutually fitting and conforming state. A sealing resistance groove is opened inside the docking guide pad, and a sealing resistance pad is integrally formed around the periphery of the conveying guide pad.
[0007] Furthermore, the sealing resistance pad is annular, and the inner side of the docking guide pad and the periphery of the conveying guide pad are mutually fitted and limited through the sealing resistance groove and the sealing resistance pad.
[0008] Preferably, a first adhesive sealing layer is applied between the inner side of the docking guide pad and the periphery of the conveying guide pad, and between the end of the limit socket and the end of the docking guide pad;
[0009] Furthermore, the docking guide pad and the conveying guide pad, and the limit socket and the end of the docking guide pad are hermetically adhesively fitted through the first adhesive sealing layer.
[0010] Preferably, an installation pressure pad for docking cooperation is arranged between the ports of the front pipeline and the rear pipeline. The installation pressure pad is of an annular structure and the cross-section of the installation pressure pad is in a T-shaped appearance. Docking ports are provided on the peripheries of the front pipeline and the rear pipeline. Two sets of clamping members are in a clamped docking and fixing state in the docking ports inside the front pipeline and the rear pipeline.
[0011] Preferably, a third adhesive sealing layer is applied between the front pipeline and the rear pipeline and on the inner side of the clamping member;
[0012] Furthermore, when the front pipeline and the rear pipeline are docked through the installation pressure pad, the front pipeline, the rear pipeline and the installation pressure pad are hermetically adhesively fitted through the third adhesive sealing layer, and the inner side of the clamping member and the peripheries of the front pipeline and the rear pipeline are hermetically adhesively fitted through the third adhesive sealing layer.
[0013] Preferably, two assembled sealing clamp rings are sleeved outside the front pipeline and the rear pipeline. An internal groove adapted to the clamping member is provided on the inner wall of the sealing clamp ring. When the two sealing clamp rings are spliced, they are in a mutually clamped fit with the clamping member through the inside of the internal groove. A connecting member is integrally formed on the periphery of the sealing clamp ring. A fixing screw hole is provided inside the connecting member. A bolt assembly is in a threaded fixing fit in the fixing screw hole inside the connecting member.
[0014] Beneficial effects
[0015] The utility model provides an anti-corrosion protection device for an oilfield pipeline weld. It has the following beneficial effects:
[0016] (1). This anti-corrosion protection device for oilfield pipeline welds. In this article, the traditional rigid pipeline welding is changed to soft-shaped assembly. At the inner sides of the corresponding front pipeline and rear pipeline interfaces, there are respectively provided a docking guide pad and a conveying guide pad that can be docked with each other. Both the docking guide pad and the conveying guide pad are made of elastic anti-corrosion materials. When the front pipeline and the rear pipeline are docked, the docking guide pad and the conveying guide pad inside the front pipeline and the rear pipeline can first be squeezed and fitted with each other, so that multiple sealing blocking pads on the periphery of the conveying guide pad are fitted and sealed with the sealing blocking grooves. One end of the conveying guide pad is sleeved with a limit socket piece that can be screwed with multiple connecting convex pads to limit the docking guide pad, and a second adhesive sealing layer is applied in the connecting screw grooves. At the same time, the sealing performance between the docking guide pad and the conveying guide pad is further increased. A first adhesive sealing layer is applied to the inner side of the docking guide pad and the outer side of the conveying guide pad to adhesively seal the front pipeline and the rear pipeline with each other, and an anti-corrosion layer is also provided on the inner side of the conveying guide pad. In this way, a mutually adhesively sealed state can be formed between the docking guide pad and the conveying guide pad. When the oil in the rear pipeline is transported, it can directly flow into the front pipeline through the conveying guide pad without contacting the inner and outer sides of the docking part of the front pipeline and the rear pipeline to cause corrosion reactions. When the ports of the front pipeline and the rear pipeline are docked, they can be clamped with each other through the installation of a pressure pad, and the third adhesive sealing layer on both sides of the pressure pad is further used to form a sealed adhesion and fixation with the front pipeline and the rear pipeline. Then, two external clamping parts are inserted into the docking port to pull and limit the front pipeline and the rear pipeline. At the same time, a third adhesive sealing layer is also applied to the inner side of the clamping parts for sealing and adhesion. The two sealing clamping rings are used to fasten the docking and buckling of the clamping parts. In this way, while ensuring the normal transportation and use of oil, the docking stability and sealing performance between the front pipeline and the rear pipeline are also guaranteed, thereby achieving the effect of improving the service life of the pipeline transportation and increasing the pipeline sealing performance.
[0017] (2). This anti-corrosion protection device for oilfield pipeline welds. After the front pipeline and the rear pipeline are docked, sealed and installed, the docking guide pad and the conveying guide pad are also in a mutually sealed and fitted state. Both the docking guide pad and the conveying guide pad are made of elastic anti-corrosion materials. When the front pipeline and the rear pipeline are docked through the installation of a pressure pad, they are also further sealed and adhesively bonded through the third adhesive sealing layer. When stress extrusion and pulling occur underground between the front pipeline and the rear pipeline, the interface between the front pipeline and the rear pipeline can react through the slight relaxation viscosity of the third adhesive sealing layer, so that the inside of the front pipeline and the rear pipeline can undergo corresponding deformation buffering through the elastic characteristics of the docking guide pad and the conveying guide pad, avoiding the direct interaction between the front pipeline and the rear pipeline and the stress rigidity, resulting in pipeline damage. Thus, the front pipeline and the rear pipeline have the effect of autonomous adaptation and adjustment, and the service life of the front pipeline and the rear pipeline is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.
[0019] The structures, proportions, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have technical substance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model.
[0020] Figure 1 Schematic diagram of the overall structure of the present utility model;
[0021] Figure 2 For the present utility model Figure 1 Enlarged view of A in;
[0022] Figure 3 For the present utility model Figure 1 Enlarged view of B in;
[0023] Figure 4 For the present utility model Figure 1 Enlarged view of C in;
[0024] Figure 5 Partial schematic diagram of the sealing clamping ring of the present utility model.
[0025] Legend description:
[0026] 1. Front-side pipeline; 2. Rear-side pipeline; 3. Docking guide pad; 4. Conveying guide pad; 5. Sealing resistance groove; 6. Sealing resistance pad; 7. First adhesive sealing layer; 8. Limit socket; 9. Connecting convex pad; 10. Connecting screw groove; 11. Second adhesive sealing layer; 12. Anticorrosion layer; 13. Installation pressure pad; 14. Third adhesive sealing layer; 15. Docking port; 16. Biting part; 17. Sealing clamping ring; 18. Built-in groove; 19. Connecting piece; 20. Fixed screw hole; 21. Bolt assembly. Detailed implementation manners
[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0028] Embodiment: An anti-corrosion protection device for oilfield pipeline welds, as Figures 1-5 shown, including a front pipeline 1 and a rear pipeline 2;
[0029] Differently, a docking guide pad 3 is arranged at the inner wall interface position of the front pipeline 1, and a conveying guide pad 4 that fits with the inner side of the docking guide pad 3 is arranged at the inner wall interface position of the rear pipeline 2. Both the docking guide pad 3 and the conveying guide pad 4 are elliptical hollow structures and are made of elastic anti-corrosion materials. When the front pipeline 1 and the rear pipeline 2 are docked with each other, the inner side of the docking guide pad 3 and the periphery of the conveying guide pad 4 are in a mutually fitting and adhering state. A sealing resistance groove 5 is opened on the inner side of the docking guide pad 3, and a sealing resistance pad 6 is integrally formed on the periphery of the conveying guide pad 4. An end limiting socket part 8 that is hermetically matched with the docking guide pad 3 is sleeved outside the conveying guide pad 4. A first adhesive sealing layer 7 is coated between the inner side of the docking guide pad 3 and the periphery of the conveying guide pad 4 and between the end of the limiting socket part 8 and the end of the docking guide pad 3. A connecting convex pad 9 is integrally formed on the outer periphery of the end of the conveying guide pad 4. A connecting screw groove 10 is opened on the inner side of the limiting socket part 8, and the inner side of the limiting socket part 8 is in threaded engagement with a second adhesive sealing layer 11 through the connecting screw groove 10. A second adhesive sealing layer 11 is arranged inside the connecting screw groove 10. An installation pressing pad 13 with a docking fit is arranged between the ports of the front pipeline 1 and the rear pipeline 2. Docking ports 15 are opened on the peripheries of both the front pipeline 1 and the rear pipeline 2. The docking ports 15 inside the front pipeline 1 and the rear pipeline 2 are in a clamped and docked fixed state through two sets of clamping parts 16. A third adhesive sealing layer 14 is coated between the front pipeline 1 and the rear pipeline 2 and inside the clamping parts 16. Two assembled sealing clamp rings 17 are sleeved outside the front pipeline 1 and the rear pipeline 2. An inner groove 18 adapted to the clamping parts 16 is opened on the inner wall of the sealing clamp ring 17. When the two sealing clamp rings 17 are spliced with each other, they are in a mutually clamped fit with the clamping parts 16 through the inside of the inner groove 18. A connecting part 19 is integrally formed on the periphery of the sealing clamp ring 17. A fixing screw hole 20 is opened inside the connecting part 19, and the fixing screw hole 20 inside the connecting part 19 is in threaded fixing cooperation with a bolt assembly 21.
[0030] Furthermore, when the connecting screw groove 10 on the inner side of the limiting socket part 8 is in threaded engagement with the connecting convex pad 9 outside the conveying guide pad 4, the limiting socket part 8 and the conveying guide pad 4 are in a sealed and adhesive state through the second adhesive sealing layer 11.
[0031] Further, the sealing gasket 6 is annular, and the inner side of the docking guide pad 3 and the periphery of the conveying guide pad 4 are mutually fitted and limited through the sealing groove 5 and the sealing gasket 6.
[0032] Further, both between the docking guide pad 3 and the conveying guide pad 4 and between the limiting socket member 8 and the end of the docking guide pad 3 are hermetically adhesively fitted through the first adhesive sealing layer 7.
[0033] Further, the installation pressing gasket 13 is of an annular structure and the cross-section of the installation pressing gasket 13 is in a T-shaped appearance.
[0034] Further, when the front pipeline 1 and the rear pipeline 2 are docked through the installation pressing gasket 13, both between the front pipeline 1 and the rear pipeline 2 and between the front pipeline 1, the rear pipeline 2 and the installation pressing gasket 13 are hermetically adhesively fitted through the third adhesive sealing layer 14, and between the inner side of the engaging member 16 and the peripheries of the front pipeline 1 and the rear pipeline 2 are hermetically adhesively fitted through the third adhesive sealing layer 14.
[0035] The working principle of the present utility model:
[0036] When the front pipeline 1 and the rear pipeline 2 are docked, the docking guide pad 3 and the conveying guide pad 4 inside the front pipeline 1 and the rear pipeline 2 can first be mutually pressed and fitted, so that multiple groups of sealing gaskets 6 on the periphery of the conveying guide pad 4 are fitted and sealed with the sealing grooves 5. One end of the conveying guide pad 4 is sleeved with a limiting socket member 8 that can be screwed with multiple groups of connecting pads 9 to limit the docking guide pad 3, and the second adhesive sealing layer 11 is applied in the connecting screw groove 10. At the same time, the sealing performance between the docking guide pad 3 and the conveying guide pad 4 is further increased. The inner side of the docking guide pad 3 and the outer side of the conveying guide pad 4 are both coated with the first adhesive sealing layer 7 to adhesively seal the front pipeline 1 and the rear pipeline 2 with each other, and an anti-corrosion layer 12 is also provided on the inner side of the conveying guide pad 4 for anti-corrosion. In this way, a mutually adhesively sealed state can be formed between the docking guide pad 3 and the conveying guide pad 4. When the petroleum inside the rear pipeline 2 is conveyed, it can directly flow into the front pipeline 1 through the conveying guide pad 4 without contacting the inner and outer sides of the docking part of the front pipeline 1 and the rear pipeline 2 to generate a corrosion reaction. When the ports of the front pipeline 1 and the rear pipeline 2 are docked, they can be mutually clamped through the installation pressing gasket 13, and the third adhesive sealing layer 14 on both sides of the installation pressing gasket 13 is further used to form a sealed adhesive fixation with the front pipeline 1 and the rear pipeline 2. Then, with the cooperation of two groups of engaging members 16 clamped into the docking port 15, the front pipeline 1 and the rear pipeline 2 are pulled and limited. At the same time, the third adhesive sealing layer 14 is also applied to the inner side of the engaging member 16 for sealing and adhesion. The two groups of sealing clamping rings 17 are used to fasten the docking and buckling of the engaging member 16. In this way, while ensuring the normal conveying and use of petroleum, the docking stability and sealing performance between the front pipeline 1 and the rear pipeline 2 are also guaranteed.
[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only to illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.
Claims
1. An anti-corrosion protection device for oilfield pipeline welds, comprising a front pipeline (1) and a rear pipeline (2), characterized in that: At the inner wall interface of the front-side pipe (1), a docking guide pad (3) is arranged. At the inner wall interface of the rear-side pipe (2), a conveying guide pad (4) that fits with the inner side of the docking guide pad (3) is arranged. An outer sleeve of the conveying guide pad (4) is provided with a limit socket piece (8) that is hermetically matched with the docking guide pad (3). An outer periphery of an end of the conveying guide pad (4) is integrally formed with a connecting convex pad (9). An inner side of the limit socket piece (8) is provided with a connecting screw groove (10). The inner side of the limit socket piece (8) is in threaded engagement with a second adhesive sealing layer (11) through the connecting screw groove (10). The second adhesive sealing layer (11) is arranged inside the connecting screw groove (10).
2. The anti-corrosion protection device for the welded joint of an oilfield pipeline according to claim 1, wherein: Both the docking guide pad (3) and the conveying guide pad (4) are elliptical hollow structures, and both the docking guide pad (3) and the conveying guide pad (4) are made of elastic anti-corrosion materials.
3. An anti-corrosion protection device for oilfield pipeline welds according to claim 1, characterized in that: When the connecting screw groove (10) inside the limit socket piece (8) is in threaded engagement with the connecting convex pad (9) outside the conveying guide pad (4), the limit socket piece (8) and the conveying guide pad (4) are in a sealed and adhesive state through the second adhesive sealing layer (11).
4. An anti-corrosion protection device for oilfield pipeline welds according to claim 1, characterized in that: When the front-side pipe (1) and the rear-side pipe (2) are docked with each other, the inner side of the docking guide pad (3) and the outer periphery of the conveying guide pad (4) are in a mutually fitting and conforming state. A sealing resistance groove (5) is arranged inside the docking guide pad (3). An outer periphery of the conveying guide pad (4) is integrally formed with a sealing resistance pad (6). The sealing resistance pad (6) is annular. The inner side of the docking guide pad (3) and the outer periphery of the conveying guide pad (4) are in mutually fitting and limiting cooperation through the sealing resistance groove (5) and the sealing resistance pad (6).
5. The anti-corrosion protection device for the welded joint of an oilfield pipeline according to claim 4, characterized in that: A first adhesive sealing layer (7) is coated between the inner side of the docking guide pad (3) and the outer periphery of the conveying guide pad (4) and between the end of the limit socket piece (8) and the end of the docking guide pad (3). The docking guide pad (3) and the conveying guide pad (4) and the end of the limit socket piece (8) and the docking guide pad (3) are in sealed and adhesive cooperation through the first adhesive sealing layer (7).
6. The anti-corrosion protection device for the welded joint of an oilfield pipeline according to claim 4, characterized in that: An installation pressing pad (13) for docking cooperation is arranged between the ports of the front-side pipe (1) and the rear-side pipe (2). Docking ports (15) are provided on the outer peripheries of both the front-side pipe (1) and the rear-side pipe (2). The docking ports (15) inside the front-side pipe (1) and the rear-side pipe (2) are in a clamped and docked fixed state through two sets of clamping members (16).
7. The anti-corrosion protection device for the welded joint of the oilfield pipeline according to claim 6, characterized in that: A third adhesive sealing layer (14) is coated between the front-side pipe (1) and the rear-side pipe (2) and inside the clamping members (16). When the front-side pipe (1) and the rear-side pipe (2) are docked through the installation pressing pad (13), the front-side pipe (1), the rear-side pipe (2), and the installation pressing pad (13) are in mutually sealed and adhesive cooperation through the third adhesive sealing layer (14). The inner side of the clamping members (16) and the outer peripheries of the front-side pipe (1) and the rear-side pipe (2) are in mutually sealed and adhesive cooperation through the third adhesive sealing layer (14).
8. The anti-corrosion protection device for the welded joint of an oilfield pipeline according to claim 7, characterized in that: Two sets of assembled sealing clamping rings (17) are sleeved outside the front pipeline (1) and the rear pipeline (2). An inner groove (18) adapted to the engaging member (16) is formed in the inner wall of the sealing clamping ring (17). When the two sets of sealing clamping rings (17) are spliced with each other, they are engaged with the engaging member (16) through the inside of the inner groove (18). A connecting member (19) is integrally formed on the periphery of the sealing clamping ring (17). A fixing screw hole (20) is formed in the connecting member (19), and is in threaded fixing cooperation with a bolt assembly (21) in the fixing screw hole (20) inside the connecting member (19).