Petroleum drilling pipeline connecting device

Abstract

The utility model belongs to the technical field of petroleum drilling pipeline connection, and particularly relates to a petroleum drilling pipeline connecting device which comprises a first pipeline and a second pipeline, a first flange plate is arranged on one side of the first pipeline, a second flange plate is arranged on one side of the second pipeline, and the first flange plate and the second flange plate are connected through eight threaded rods. A first fixing hole and a second fixing hole are formed in each threaded rod, elastic fixing assemblies are arranged on the sides, away from each other, of the first flange plate and the second flange plate, limiting rods are arranged in the first fixing holes and the second fixing holes, third fixing holes are formed in the bottoms of the limiting rods, and elastic fixing assemblies are arranged in the third fixing holes. According to the device, the limiting rod and the elastic fixing assembly are arranged, the threaded rod can be effectively prevented from loosening even when the device faces large impact loads and vibration loads, meanwhile, the arc-shaped sealing ring composed of the arc-shaped sealing plates can be tightly attached to the connecting gap of the first flange plate and the second flange plate, and petroleum leakage is effectively prevented.

Description

Technical Field

[0001] This utility model belongs to the technical field of oil drilling pipeline connection, and specifically relates to an oil drilling pipeline connection device. Background Art

[0002] In the oil drilling industry, the reliability and tightness of pipeline connection have always been crucial aspects. As an important energy resource, oil needs to be transported over long distances through pipelines during the processes of extraction and transportation. The connection quality between pipelines directly affects the safety and efficiency of the entire oil transportation system.

[0003] In traditional oil drilling pipeline connection methods, a connection structure combining flange plates and threaded rods is usually adopted. For example, a first flange plate is provided at one end of the first pipeline, a second flange plate is provided at one end of the second pipeline, and then multiple threaded rods are used to pass through the corresponding holes on the two flange plates to achieve connection and fixation.

[0004] However, in actual oil transportation scenarios, this connection method faces many severe challenges. The flow of oil in the pipeline is not stable and uniform, but has large pressure fluctuations and flow rate changes. This results in significant impact loads being generated inside the pipeline. At the same time, there are often the operations of various large-scale mechanical equipment at the drilling site, such as drilling rigs, pumping units, etc. The operation of these devices will cause strong vibrations, thus bringing vibration loads to the pipeline. When the impact load and the vibration load act on the pipeline connection part together, their resultant force is likely to exceed the frictional force generated during bolt pre-tightening. In this case, the threaded rod is prone to relative sliding and gradually loosens. As the bolts loosen, the fit between the flange plates is no longer tight, and the originally sealing gasket or sealing material will be subjected to uneven pressure distribution, and the sealing effect gradually weakens.

[0005] The deterioration of this sealing effect will cause a series of serious problems. First of all, oil leakage is inevitable. The leaked oil will not only cause huge economic losses because every drop of leaked oil represents a waste of precious resources. Moreover, the leaked oil will cause serious pollution to the surrounding environment, damaging the soil, water sources and ecological systems. Secondly, the leaked oil is flammable and explosive. Once it encounters an open fire or a high-temperature environment, it is extremely easy to trigger a fire or even an explosion accident, posing a great threat to the lives of on-site workers. At the same time, the equipment will also be eroded and damaged due to the oil leakage, shortening its service life and increasing the cost of equipment maintenance and replacement.

[0006] In addition, due to the sealing failure and bolt loosening at the pipe connection, frequent repairs and inspections are required, which not only consume a large amount of manpower, material resources and time, but also lead to frequent interruptions in drilling operations, seriously affecting the work efficiency of oil extraction and transportation, increasing production costs and reducing the economic benefits of enterprises.

[0007] Therefore, we propose an oil drilling pipe connection device. By setting limit rods and elastic fixing components, even in the face of large impact loads and vibration loads, it can effectively prevent the threaded rods from loosening, ensuring the stability of the pipe connection. At the same time, the arc-shaped sealing ring composed of arc-shaped sealing plates can closely fit the connection gap between the first flange and the second flange, effectively preventing oil leakage and reducing the risk of environmental pollution and resource waste. Summary of the Invention

[0008] The purpose of this utility model is to provide an oil drilling pipe connection device. By setting limit rods and elastic fixing components, even in the face of large impact loads and vibration loads, it can effectively prevent the threaded rods from loosening, ensuring the stability of the pipe connection. At the same time, the arc-shaped sealing ring composed of arc-shaped sealing plates can closely fit the connection gap between the first flange and the second flange, effectively preventing oil leakage and reducing the risk of environmental pollution and resource waste.

[0009] The technical solutions adopted in this utility model are specifically as follows:

[0010] An oil drilling pipe connection device includes a first pipe and a second pipe. A first flange is provided on one side of the first pipe, and a second flange is provided on one side of the second pipe. The first flange and the second flange are connected by eight threaded rods. Each threaded rod is provided with a first fixing hole and a second fixing hole, and elastic fixing components are provided on both sides of the first flange and the second flange away from each other.

[0011] Limit rods are arranged inside the first fixing hole and the second fixing hole. A third fixing hole is provided at the bottom of the limit rod, and the elastic fixing component is arranged inside the third fixing hole. An arc-shaped sealing plate is arranged between the two limit rods. There are eight arc-shaped sealing plates, and the eight arc-shaped sealing plates form an arc-shaped sealing ring, which is located at the connection gap between the first flange and the second flange.

[0012] Furthermore, the two limit rods respectively match the first fixing hole and the second fixing hole.

[0013] Further, the elastic fixing component includes hollow shells respectively arranged on one side of the first flange and the second flange. A spring is arranged inside the hollow shell. A piston disc is arranged on one side of the spring. An active fixing rod is arranged on the side of the piston disc away from the spring. One end of the active fixing rod away from the piston disc penetrates out of the hollow shell and is arranged inside the third fixing hole.

[0014] Further, first flexible sealing layers are arranged on the sides of every two of the arc-shaped sealing plates close to each other.

[0015] Further, second flexible sealing layers are arranged on the inner sides of each of the arc-shaped sealing plates.

[0016] Further, a circular sealing groove is formed on one side of the first flange, and a circular sealing ring is arranged on one side of the second flange. The circular sealing ring is arranged inside the circular sealing groove.

[0017] The technical effects achieved by this utility model are as follows:

[0018] First, when connecting pipelines, the first pipeline and the second pipeline are made to approach each other. At this time, the first flange and the second flange are fitted together, and then the first flange and the second flange are fixed by eight threaded rods. In the prior art, although the threaded rods can be used for fixing, when the pipeline transports petroleum, the large impact load and vibration load exceed the friction force during bolt pre-tightening, resulting in relative sliding and loosening of the bolts, thereby deteriorating the sealing effect at the connection and causing petroleum leakage. Therefore, after the first flange and the second flange are connected by the threaded rods, by making the two limiting rods respectively enter the first fixing hole and the second fixing hole, at this time, the arc-shaped sealing plate between the two limiting rods tightly fits and seals the connection gap between the first flange and the second flange, and then the elastic fixing component enters the third fixing hole for locking. Thus, even if there are impact loads and vibration loads, because the two limiting rods are fixed inside the first fixing hole and the second fixing hole, the threaded rods will not loosen. At the same time, the connection gap between the first flange and the second flange can be tightly fitted and sealed to prevent the risk of petroleum leakage. By setting the limiting rods and the elastic fixing component, the device can effectively prevent the threaded rods from loosening even in the face of large impact loads and vibration loads, ensuring the stability of pipeline connection. At the same time, the arc-shaped sealing ring composed of the arc-shaped sealing plates can tightly fit the connection gap between the first flange and the second flange, effectively preventing petroleum leakage and reducing the risk of environmental pollution and resource waste. Description of the Drawings

[0019] Figure 1 is the overall structural schematic diagram of the present utility model;

[0020] Figure 2 This is the exploded view of the utility model.

[0021] Figure 3 This is the structural schematic diagram of the threaded rod of the utility model.

[0022] Figure 4 This is the structural schematic diagram of the elastic fixing component of the utility model.

[0023] Figure 5 This is the structural schematic diagram of the circular sealing ring of the utility model.

[0024] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0025] 1. First pipeline; 2. Second pipeline; 3. First flange; 4. Second flange; 5. Threaded rod; 6. First fixing hole; 7. Second fixing hole; 8. Limiting rod; 9. Third fixing hole; 10. Arc-shaped sealing plate; 11. Hollow housing; 12. Spring; 13. Piston disc; 14. Movable fixing rod; 15. Circular sealing groove; 16. Circular sealing ring. Specific embodiments

[0026] In order to make the purpose and advantages of the present utility model clearer, the following specifically describes the present utility model in conjunction with embodiments. It should be understood that the following text only describes one or several specific implementation manners of the present utility model, and does not strictly limit the protection scope of the specific claims of the present utility model.

[0027] As Figures 1-5 shown, the technical solution adopted by the present utility model is specifically as follows: An oil drilling pipeline connection device includes a first pipeline 1 and a second pipeline 2. A first flange 3 is provided on one side of the first pipeline 1, and a second flange 4 is provided on one side of the second pipeline 2. The first flange 3 and the second flange 4 are connected by eight threaded rods 5. Each threaded rod 5 is provided with a first fixing hole 6 and a second fixing hole 7, and elastic fixing components are provided on both sides of the first flange 3 and the second flange 4 that are far away from each other.

[0028] Limiting rods 8 are provided inside both the first fixing hole 6 and the second fixing hole 7. A third fixing hole 9 is provided at the bottom of the limiting rod 8, and an elastic fixing component is provided inside the third fixing hole 9. An arc-shaped sealing plate 10 is provided between the two limiting rods 8. There are eight arc-shaped sealing plates 10, and the eight arc-shaped sealing plates 10 form an arc-shaped sealing ring, and it is located at the connection gap between the first flange 3 and the second flange 4.

[0029] Its working principle is as follows: First, when connecting the pipelines, the first pipeline 1 and the second pipeline 2 are brought closer to each other. At this time, the first flange 3 and the second flange 4 are in contact, and then the first flange 3 and the second flange 4 are fixed by eight threaded rods 5. In the prior art, although the threaded rods 5 can be used for fixing, when the pipeline transports oil, the large impact load and vibration load exceed the friction force during bolt pre-tightening, resulting in relative sliding and loosening of the bolts, thus deteriorating the sealing effect at the connection and causing oil leakage. Therefore, after the first flange 3 and the second flange 4 are connected by the threaded rods 5, by making the two limiting rods 8 enter the first fixing hole 6 and the second fixing hole 7 respectively, at this time, the arc-shaped sealing plate 10 between the two limiting rods 8 tightly fits and seals the connection gap between the first flange 3 and the second flange 4, and then the elastic fixing component enters the third fixing hole 9 for locking. Thus, even if there are impact loads and vibration loads, since the two limiting rods 8 are fixed in the first fixing hole 6 and the second fixing hole 7, the threaded rods 5 will not loosen, and at the same time, the connection gap between the first flange 3 and the second flange 4 can be tightly sealed to prevent the risk of oil leakage. By setting the limiting rods 8 and the elastic fixing component, the device can effectively prevent the threaded rods 5 from loosening even when facing large impact loads and vibration loads, ensuring the stability of pipeline connection. At the same time, the arc-shaped sealing ring composed of the arc-shaped sealing plate 10 can tightly fit the connection gap between the first flange 3 and the second flange 4, effectively preventing oil leakage and reducing the risk of environmental pollution and resource waste.

[0030] Among them, the two limiting rods 8 respectively match the first fixing hole 6 and the second fixing hole 7. Here, the meaning of "matching" is that the two limiting rods 8 can enter the first fixing hole 6 and the second fixing hole 7, and at the same time, they will not shake during operation, improving their stability.

[0031] At the same time, the limiting rods 8 are made of high-strength materials, such as stainless steel, etc. Such a setting not only makes them have high strength, but also is not easy to corrode and rust, increasing their service life.

[0032] The elastic fixing component includes hollow shells 11 respectively arranged on one side of the first flange 3 and the second flange 4. A spring 12 is arranged inside the hollow shell 11. A piston disk 13 is arranged on one side of the spring 12. An active fixing rod 14 is arranged on the side of the piston disk 13 away from the spring 12. One end of the active fixing rod 14 away from the piston disk 13 penetrates out of the hollow shell 11 and is arranged inside the third fixing hole 9.

[0033] Before the limiting rod 8 enters the first fixing hole 6 or the second fixing hole 7, the piston disk 13 is driven by the movable fixing rod 14 to compress the spring 12 inside the hollow housing 11, so that it has elastic potential energy. Then, after the limiting rod 8 enters the first fixing hole 6 or the second fixing hole 7, the elastic force of the spring 12 causes the movable fixing rod 14 to enter the third fixing hole 9 for locking.

[0034] Among them, the position of the third fixing hole 9 corresponds to the position of the movable fixing rod 14. Such a setting can enable the movable fixing rod 14 to enter the third fixing hole 9 for fixing.

[0035] A first flexible sealing layer is provided on one side of each two arc-shaped sealing plates 10 close to each other. Through the first flexible sealing layer, the sealing performance can be improved when the arc-shaped sealing plates 10 are fitted together.

[0036] A second flexible sealing layer is provided on the inner side of each arc-shaped sealing plate 10. Through the second flexible sealing layer, the sealing effect of the connection gap between the first flange 3 and the second flange 4 can be improved.

[0037] A circular sealing groove 15 is formed on one side of the first flange 3, and a circular sealing ring 16 is provided on one side of the second flange 4. The circular sealing ring 16 is arranged inside the circular sealing groove 15. Such a setting can prevent oil leakage and improve its sealing performance.

[0038] The working principle of this utility model is as follows: Firstly, when connecting pipelines, the first pipeline 1 and the second pipeline 2 are brought closer to each other. At this time, the first flange 3 and the second flange 4 are in contact. Then, the first flange 3 and the second flange 4 are fixed by eight threaded rods 5. In the prior art, although the threaded rods 5 can be used for fixation, when the pipeline transports oil, the large impact load and vibration load exceed the friction force during bolt pre-tightening, resulting in relative sliding and loosening of the bolts, thereby deteriorating the sealing effect at the connection and causing oil leakage. Therefore, after the first flange 3 and the second flange 4 are connected by the threaded rods 5, by inserting two limiting rods 8 into the first fixing hole 6 and the second fixing hole 7 respectively. At this time, the arc-shaped sealing plate 10 between the two limiting rods 8 tightly fits the connection gap between the first flange 3 and the second flange 4 for sealing. Then, the elastic fixing component enters the third fixing hole 9 for locking. Thus, even if impact loads and vibration loads occur, since the two limiting rods 8 are fixed in the first fixing hole 6 and the second fixing hole 7, the threaded rods 5 will not loosen. At the same time, the connection gap between the first flange 3 and the second flange 4 can be tightly sealed to prevent the risk of oil leakage. By setting the limiting rods 8 and the elastic fixing component, the device can effectively prevent the threaded rods 5 from loosening even when facing large impact loads and vibration loads, ensuring the stability of pipeline connection. At the same time, the arc-shaped sealing ring composed of the arc-shaped sealing plate 10 can tightly fit the connection gap between the first flange 3 and the second flange 4, effectively preventing oil leakage and reducing the risk of environmental pollution and resource waste.

[0039] The above are only the preferred embodiments of this utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of this utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of this utility model. The structures, devices, and operation methods not specifically described and explained in this utility model, unless otherwise specified and limited, are implemented according to the conventional means in this field.

Claims

1. An oil drilling pipeline connection device, comprising a first pipeline (1) and a second pipeline (2), characterized in that: A first flange (3) is provided on one side of the first pipe (1), a second flange (4) is provided on one side of the second pipe (2), the first flange (3) and the second flange (4) are connected by eight threaded rods (5), and a first fixing hole (6) and a second fixing hole (7) are formed in each of the threaded rods (5), and elastic fixing components are provided on the sides of the first flange (3) and the second flange (4) away from each other; Limit rods (8) are provided inside the first fixing hole (6) and the second fixing hole (7), a third fixing hole (9) is formed at the bottom of the limit rod (8), the elastic fixing component is provided inside the third fixing hole (9), an arc-shaped sealing plate (10) is provided between the two limit rods (8), there are eight arc-shaped sealing plates (10), and the eight arc-shaped sealing plates (10) form an arc-shaped sealing ring, and it is located at the connection gap between the first flange (3) and the second flange (4).

2. The oil drilling pipeline connection device according to claim 1, characterized in that: The two limit rods (8) respectively match the first fixing hole (6) and the second fixing hole (7).

3. An oil drilling pipeline connection device according to claim 1, characterized in that: The elastic fixing component includes hollow shells (11) respectively provided on one side of the first flange (3) and the second flange (4), a spring (12) is provided inside the hollow shell (11), a piston disc (13) is provided on one side of the spring (12), a movable fixing rod (14) is provided on the side of the piston disc (13) away from the spring (12), and one end of the movable fixing rod (14) away from the piston disc (13) penetrates out of the hollow shell (11) and is provided inside the third fixing hole (9).

4. A connection device for an oil drilling pipeline according to claim 1, characterized in that: A first flexible sealing layer is provided on the side of each two arc-shaped sealing plates (10) close to each other.

5. A connection device for an oil drilling pipeline according to claim 1, characterized in that: A second flexible sealing layer is provided inside each arc-shaped sealing plate (10).

6. The oil drilling pipeline connection device according to claim 1, characterized in that: A circular sealing groove (15) is formed on one side of the first flange (3), a circular sealing ring (16) is provided on one side of the second flange (4), and the circular sealing ring (16) is arranged inside the circular sealing groove (15).

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