Natural gas pipeline penetrating assembly
By using vacuum concentric tubes and hot water to unblock natural gas pipelines, the problem of pipeline freezing and blockage in winter has been solved, achieving low-cost and efficient unblocking results and reducing the difficulty of construction and maintenance.
Patent Information
- Application Number
- CN202520345252.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-03
AI Technical Summary
During the winter operating period, natural gas pipelines are prone to freezing and blockage, which is difficult to handle with existing technologies. In particular, during peak periods, they cannot meet the continuous production needs of gas wells, and conventional unblocking methods are high-risk and high-cost.
A vacuum concentric tube is inserted into the frozen blockage location, allowing natural gas to bypass the frozen section and unblock the blockage with hot water. Only two points are excavated on the ground to pass through the vacuum concentric tube, and the blockage is unblocked by combining the unblocking injection pipe and the hot water pipeline, thus avoiding freezing of the connecting pipe.
This reduced construction costs and land acquisition, enabling low-cost and low-difficulty unblocking of frozen areas, achieving one-time unblocking and lifelong maintenance, and reducing maintenance workload.
Smart Images
Figure CN223840170U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of natural gas pipeline antifreeze and anti-blockage technology, and in particular relates to a natural gas pipeline pipe-penetrating assembly. Background Technology
[0002] During natural gas production, natural gas contains impurities such as oil and water. Over time, these impurities accumulate on the inner walls of pipelines, especially in low-lying areas, where oily impurities frequently clog the lines, severely impacting normal well production. Conventional methods involve hot washing or using heating tape to slowly remove the blockage. However, during winter, the low underground temperatures mean that inadequate hot washing can lead to complete enema of the gas production pipeline, posing a high risk and significant challenge. Furthermore, the heating tapes used in gas well production pipelines are often severely aged due to long-term underground operation, resulting in a high failure rate and numerous breaks. On-site repairs require substantial land acquisition and maintenance, making the use of heating tapes for blockage removal impractical. In summary, during peak winter natural gas consumption, pipeline blockage is difficult to manage and cannot meet the continuous production demands of gas wells. Utility Model Content
[0003] To address the problem of freezing and blockage in gas pipelines during winter operation, this invention provides a natural gas pipeline pipe-through assembly. Once the location of the blockage is found, a vacuum concentric tube is inserted through the assembly, allowing natural gas to bypass the original blocked section and flow through the vacuum concentric tube, thus solving the problem of gas pipeline freezing and blockage. This invention requires less ground excavation area, less land acquisition, and lower construction costs.
[0004] The technical solution provided by this utility model is: a natural gas pipeline pipe-through assembly, including a vacuum concentric tube and a connecting pipe. The vacuum concentric tube includes an inner wall, a middle wall, and an outer wall, which are concentric with each other. A vacuum space exists between the middle wall and the outer wall to prevent heat conduction. An air space exists between the inner wall and the middle wall. A water pipe A is connected to the upper side of one end of the air space, and a water pipe B is connected to the lower side of the other end of the air space. When freezing occurs inside the inner wall, the air space becomes a hot water flow space. Unblocking is achieved by hot water flow. The inner walls of both ends of the vacuum concentric tube are connected to the original frozen section of the natural gas pipe through connecting pipes, so that the natural gas bypasses the original frozen section of the natural gas pipe and flows through the inner wall of the vacuum concentric tube. Unblocking injection pipes are connected to the connecting pipes. Unblocking agent is injected through the unblocking injection pipes to prevent freezing at the two connecting pipes. The upper end of the unblocking injection pipe extends above the ground surface to facilitate the addition of unblocking agent without excavation. The upper ends of water pipes A and B also extend above the ground surface to facilitate the unblocking by hot water flow.
[0005] A further technical solution is: the outer wall of the vacuum concentric tube is coated with an anti-corrosion layer, the outer wall of the connecting pipe is coated with an anti-corrosion layer, the outer walls of water pipe A and water pipe B are coated with an anti-corrosion layer, and the outer wall of the unblocking injection pipe is coated with an anti-corrosion layer.
[0006] A further technical solution is that the entire vacuum concentric tube is made of stainless steel.
[0007] A further technical solution is that the connecting pipe is a double-ferrule tee connector.
[0008] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0009] 1. This application only requires excavating two points on the ground and passing a vacuum concentric tube between the two points using a pipe-passing process. Therefore, the amount of land acquisition and excavation required for this application is very small, and the construction cost is lower.
[0010] 2. Even if the vacuum concentric tube in this application freezes during use, there is still a solution for unblocking without excavation. Therefore, this application achieves one-time unblocking and lifetime maintenance, and the maintenance of frozen tubes is easy. Attached Figure Description
[0011] Figure 1 This is a top view of the entire utility model.
[0012] Figure 2 This is an elevation view of the vacuum concentric tube in this utility model.
[0013] In the diagram: 1. Original frozen section of natural gas pipe; 2. Connecting pipe; 3. Unblocking injection pipe; 4. Water pipe B; 5. Vacuum concentric pipe; 501. Inner wall; 502. Middle wall; 503. Outer wall; 504. Air space; 505. Vacuum space; 6. Valve; 7. Water pipe A. Detailed Implementation
[0014] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0015] This embodiment includes a vacuum concentric tube 5 and a connecting tube 2. The vacuum concentric tube 5 includes an inner wall 501, a middle wall 502, and an outer wall 503, which are concentric. A vacuum space 505 exists between the middle wall 502 and the outer wall 503. The vacuum space 505 prevents heat conduction and avoids low temperatures from being conducted from the outer wall 503 to the middle wall 502 and the inner wall 501, thus largely preventing the natural gas transported through the inner wall 501 from freezing and becoming blocked. An air space 504 exists between the inner wall 501 and the middle wall 502. Figure 2 As shown, a water pipe A7 is connected to the upper side of one end of the air space 504, and a water pipe B4 is connected to the lower side of the other end of the air space 504. When the inner wall 501 freezes and becomes blocked, the air space 504 becomes a hot water flow space. Hot water enters from the water pipe B4, flows through the entire air space 504, and then flows out from the water pipe A7. Since the water pipe A7 is connected to the upper side of the air space 504, it can be ensured that the entire air space 504 is filled with hot water, ensuring sufficient heat exchange. This embodiment achieves unblocking of the inner wall 501 through heat exchange. After unblocking, the water in the air space 504 needs to be drained to prevent it from freezing and damaging the vacuum concentric tube 5. The drainage method involves injecting air into the water pipe A7. Since the water pipe B4 is connected to the lower side of the air space 504, the water in the air space 504 is forced into the water pipe B4 under the air pressure and then drained. Once the water in the air space 504 is basically drained, the valves 6 on the water pipes A7 and B4 are closed. Therefore, this application provides a non-excavation unblocking method even if the inner wall 501 of the vacuum concentric tube 5 becomes frozen, truly achieving one-time unblocking and lifelong protection. The inner walls 501 at both ends of the vacuum concentric tube 5 are connected to the original frozen section of the natural gas pipe 1 via connecting pipes 2, allowing natural gas to bypass the original frozen section of the natural gas pipe 1 and flow through the inner wall 501 of the vacuum concentric tube 5. Since the two connecting pipes 2 are not vacuum walls, they are still susceptible to freezing and blockage, even though they are short. This application incorporates a deblocking injection pipe 3 connected to the connecting pipes 2. A deblocking agent is injected through the deblocking injection pipe 3 to prevent freezing and blockage at the two connecting pipes 2. The upper end of the deblocking injection pipe 3 extends above the ground surface, facilitating the addition of the deblocking agent without excavation. The upper ends of water pipes A7 and B4 also extend above the ground surface, facilitating the subsequent unblocking of hot water flow.
[0016] The outer wall 503 of the vacuum concentric tube 5 is coated with an anti-corrosion layer, the outer wall 503 of the connecting tube 2 is coated with an anti-corrosion layer, the outer wall 503 of the water pipe A7 and the water pipe B4 is coated with an anti-corrosion layer, and the outer wall 503 of the unblocking injection tube 3 is coated with an anti-corrosion layer. Thus, the entire external part of the component of this application is provided with an anti-corrosion layer to reduce the corrosive effect of soil.
[0017] The vacuum concentric tube 5 is made entirely of stainless steel.
[0018] The connecting pipe 2 is a double-ferrule tee connector, with ferrules at both ends and the third interface in the middle connected to the unblocking injection pipe 3.
[0019] In summary, this application only requires excavating two points on the ground and passing a vacuum concentric tube 5 between the two points using a pipe-passing process. Therefore, the land acquisition and excavation volume of this application are very small, the construction cost is lower, and this application can achieve one-time unblocking and lifetime maintenance, with low difficulty in maintaining frozen blockages.
Claims
1. A natural gas pipeline pipe-penetrating assembly, characterized in that: Includes a vacuum concentric tube (5) and a connecting tube (2). The vacuum concentric tube (5) includes an inner wall (501), a middle wall (502), and an outer wall (503). The inner wall (501), middle wall (502), and outer wall (503) are concentric. There is a vacuum space (505) between the middle wall (502) and the outer wall (503). There is an air space (504) between the inner wall (501) and the middle wall (502). A water pipe A (7) is connected to the upper side of one end of the air space (504). 4) The lower side of the other end is connected to water pipe B (4). The inner walls (501) of both ends of the vacuum concentric pipe (5) are connected to the original frozen section natural gas pipe (1) through connecting pipe (2), so that the natural gas bypasses the original frozen section natural gas pipe (1) and flows through the inner wall (501) of the vacuum concentric pipe (5). A deblocking injection pipe (3) is connected to the connecting pipe (2). The upper end of the deblocking injection pipe (3) extends above the ground. The upper ends of water pipe A (7) and water pipe B (4) also extend above the ground.
2. The natural gas pipeline pipe-penetrating assembly according to claim 1, characterized in that: The outer wall (503) of the vacuum concentric tube (5) is coated with an anti-corrosion layer, the outer wall (503) of the connecting tube (2) is coated with an anti-corrosion layer, the outer wall (503) of the water pipe A (7) and the water pipe B (4) is coated with an anti-corrosion layer, and the outer wall (503) of the unblocking injection tube (3) is coated with an anti-corrosion layer.
3. A natural gas pipeline pipe-penetrating assembly according to claim 1, characterized in that: The vacuum concentric tube (5) is made entirely of stainless steel.
4. A natural gas pipeline pipe-penetrating assembly according to claim 1, characterized in that: The connecting pipe (2) is a double-ferrule tee connector.