High-toughness thick-wall petroleum casing pipe
By designing a buffer-type protective structure on the oil casing and utilizing a combination of multiple protective and filling layers, the problem of joint deformation caused by internal and external forces in the mine was solved, achieving high sealing performance and low-cost protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG HONGHAI STEEL PIPE MFG CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-04-21
AI Technical Summary
When oil casing is subjected to external pressure due to the complex structure of the pipeline in the mine, the joints are prone to deformation, which can lead to material leakage. Existing technologies are not effective in preventing this.
A high-toughness thick-walled oil casing is designed, which adopts a buffer-type protective structure, including multiple protective layers and a filling layer. The protective layers made of metal and rubber deform and relieve force under external impact, and the filling layer provides buffering, thereby improving sealing and toughness.
It effectively avoids direct stress at pipe connections, improves sealing and protection performance, reduces construction costs, and enhances structural toughness and protection.
Smart Images
Figure CN224149509U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oil casing technology, specifically a high-toughness thick-walled oil casing. Background Technology
[0002] Oil casing and oil pipelines are two key but functionally different pipe materials in the petroleum industry. Oil casing is mainly used to support the well wall during drilling to prevent collapse and to maintain the stability of the well structure after completion. Oil pipelines (such as oil pipelines) are used to transport fluids such as crude oil and natural gas over long distances. Casing is usually connected to the pipeline joint by threads or couplings to ensure the stability of the joint. However, the complex structure of pipelines in mines is often subjected to external pressure, which causes deformation of the joint and leads to leakage of transported materials. Utility Model Content
[0003] The purpose of this invention is to provide a high-toughness, thick-walled oil casing to solve the above problems.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-toughness thick-walled oil casing, characterized in that it comprises;
[0005] The casing body has a buffer-type protective structure on its outer side, which includes a protective layer A, a filler layer A, a protective layer B, a filler layer B, a protective layer C, a filler layer C, and a protective layer D.
[0006] The sleeve body has an inner groove, the protective layer A is embedded in the inner groove, the protective layer B is sleeved on the outside of the protective layer A, and the filling layer A is embedded in the gap between the protective layer A and the protective layer B.
[0007] Protective layer C is fitted over the outside of protective layer B, and filler layer B is embedded in the gap between protective layer B and protective layer C;
[0008] The protective layer D is fitted over the outer side of the protective layer C, and the filling layer C is embedded in the gap between the protective layer C and the protective layer D.
[0009] The preferred casing body has an oil delivery pipe A and an oil delivery pipe B respectively at both ends. The two ends of the casing body are symmetrically provided with internal threads and external threads. One end of the oil delivery pipe A has an integrally fixed pipe joint A. The pipe joint A is fitted onto one end of the casing body and fixed with its threads. The double-layer thread fixing can greatly improve the sealing effect. After the casing body is embedded in the inside of the pipe joint A, it abuts against the inner wall of the pipe joint A, further improving the sealing performance.
[0010] One end of the oil transmission pipe B has an integrally fixed pipe joint B. The pipe joint B is fitted onto the other end of the casing body and fixed with its threads. The double-threaded fixing can greatly improve the sealing effect. Furthermore, the casing body is embedded inside the pipe joint B and abuts against the inner wall of the pipe joint B, further improving the sealing performance.
[0011] The preferred filling layers A, B, and C are made of high-density sponge material.
[0012] The preferred protective layers A and B are made of rubber. The length of protective layer B is greater than that of protective layer A. Both ends of protective layer B wrap around the connection between pipe joint A and the casing body, as well as the connection between pipe joint B and the casing body, to improve the structural toughness and provide protection when subjected to external pressure. A buffer space is formed through the gap between protective layer B and protective layer A to prevent the pipe connection from being impacted by external forces. When protective layer B is squeezed, the internal sponge provides cushioning, thereby improving the protective performance.
[0013] The preferred protective layers C and D are made of metal, which can deform when subjected to external impact, thereby relieving the force and preventing the pipe connection from being directly stressed. When protective layers C and D deform and relieve force, the internal filling layer C can provide buffering, improving the protection effect. Furthermore, when protective layers C and D deform and relieve force, the internal protective layers A and B provide multiple buffering, preventing the pipe connection from being subjected to external pressure.
[0014] The diameters of the preferred protective layers B, C, and D are larger than the diameter of the pipe joint B. The protective layer A is tough and can be expanded by external force to fit over the outside of the casing body. When the buffer protective structure is damaged, it can be replaced, reducing construction costs.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] 1. Protective layers C and D are made of metal and can deform when subjected to external impact, thereby relieving the force and preventing the pipe connection from being directly stressed. When protective layers C and D deform and relieve force, the internal filling layer C can provide buffering, improving the protection effect. Furthermore, when protective layers C and D deform and relieve force, the internal protective layers A and B provide multiple buffering, preventing the pipe connection from being subjected to external pressure.
[0017] 2. Protective layer A can be expanded by external force and fitted onto the outside of the casing body. It can be replaced when the buffer protective structure is damaged, reducing construction costs. Attached Figure Description
[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0019] Figure 2 This is a schematic diagram of the internal structure of this utility model;
[0020] Figure 3 This is a schematic diagram of the buffer-type protective structure of this utility model;
[0021] Figure 4 This is a schematic diagram of the explosion-proof buffer structure of this utility model.
[0022] In the diagram: 100, oil pipeline A; 101, pipeline joint A; 200, oil pipeline B; 201, pipeline joint B; 300, casing body; 400, protective layer A; 401, filling layer A; 402, protective layer B; 403, filling layer B; 404, protective layer C; 405, filling layer C; 406, protective layer D. Detailed Implementation
[0023] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0026] Please see Figure 1-4 This utility model provides a technical solution: a high-toughness thick-walled oil casing, comprising;
[0027] The casing body 300 has a buffer-type protective structure on its outer side, which includes a protective layer A400, a filling layer A401, a protective layer B402, a filling layer B403, a protective layer C404, a filling layer C405, and a protective layer D406.
[0028] The sleeve body 300 has an inner groove, the protective layer A400 is embedded in the inner groove, the protective layer B402 is sleeved on the outside of the protective layer A400, and the filling layer A401 is embedded in the gap between the protective layer A400 and the protective layer B402.
[0029] The protective layer C404 is fitted over the outside of the protective layer B402, and the filler layer B403 is embedded in the gap between the protective layer B402 and the protective layer C404.
[0030] The protective layer D406 is fitted over the outer side of the protective layer C404, and the filling layer C405 is embedded in the gap between the protective layer C404 and the protective layer D406.
[0031] Furthermore, oil delivery pipes A100 and B200 are respectively provided at both ends of the casing body 300. Internal threads and external threads are symmetrically provided at both ends of the casing body 300. One end of the oil delivery pipe A100 has an integrally fixed pipe joint A101. The pipe joint A101 is fitted onto one end of the casing body 300 and fixed with its threads. The double-layer thread fixing can greatly improve the sealing effect. After the casing body 300 is embedded inside the pipe joint A101, it abuts against the inner wall of the pipe joint A101, further improving the sealing performance.
[0032] One end of the oil transmission pipe B200 has an integrally fixed pipe joint B201. The pipe joint B201 is fitted onto the other end of the casing body 300 and fixed with its threads. The double-layer thread fixation can greatly improve the sealing effect. Furthermore, the casing body 300 is embedded inside the pipe joint B201 and abuts against the inner wall of the pipe joint B201, further improving the sealing performance.
[0033] Furthermore, filling layers A401, B403, and C405 are made of high-density sponge material.
[0034] Furthermore, protective layers A400 and B402 are made of rubber. The length of protective layer B402 is greater than that of protective layer A400. Both ends of protective layer B402 wrap around the connection between pipe joint A101 and sleeve body 300, as well as the connection between pipe joint B201 and sleeve body 300, improving the structural toughness and providing protection when subjected to external pressure. A buffer space is formed through the gap between protective layer B402 and protective layer A400 to prevent the pipe connection from being impacted by external forces. When protective layer B402 is squeezed, the internal sponge provides cushioning, improving the protective performance.
[0035] Furthermore, the protective layers C404 and D406 are made of metal, which can deform when subjected to external impact, thereby relieving stress and preventing direct stress on the pipe connection. When the protective layers C404 and D406 deform and relieve stress, the internal filling layer C405 can provide buffering, improving the protection effect. In addition, when the protective layers C404 and D406 deform and relieve stress, the internal protective layers A400 and B402 provide multiple buffering, preventing the pipe connection from being subjected to external pressure.
[0036] Furthermore, the diameters of protective layers B402, C404, and D406 are larger than the diameter of pipe joint B201. Protective layer A400 is tough and can be expanded by external force to fit over the outside of the casing body 300. When the buffer-type protective structure is damaged, it can be replaced, reducing construction costs.
[0037] Work distance: When using, expand the protective layer A400 with external force and put it on the outside of the sleeve body 300. Then, align the pipe joint A101 and pipe joint B201 with the two ends of the sleeve body 300 and tighten them to fix them. Put the protective layer B402 on the outside of the protective layer A400. Insert the filler layer A401 into the gap between the protective layer A400 and the protective layer B402. Put the protective layer C404 on the outside of the protective layer B402. Put the protective layer D406 on the outside of the protective layer C404. Insert the filler layer B403 between the protective layer B402 and the protective layer C404. Insert the filler layer C405 between the protective layer C404 and the protective layer D406.
[0038] Furthermore, the protective layers C404 and D406 are made of metal, which can deform when subjected to external impact, thereby relieving the force and preventing the pipe connection from being directly stressed. When the protective layers C404 and D406 deform and relieve the force, the internal filling layer C405 can provide buffering, improving the protection effect. In addition, when the protective layers C404 and D406 deform and relieve the force, the internal protective layers A400 and B402 provide multiple buffering, preventing the pipe connection from being subjected to external pressure.
[0039] Furthermore, the protective layer A400 can be expanded by external force to fit over the outside of the casing body 300, and can be replaced when the buffer protective structure is damaged, reducing construction costs.
[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A high toughness thick wall oil casing characterized by: include; The sleeve body (300) has a buffer-type protective structure on its outer side, which includes a protective layer A (400), a filling layer A (401), a protective layer B (402), a filling layer B (403), a protective layer C (404), a filling layer C (405), and a protective layer D (406). The sleeve body (300) has an inner groove, the protective layer A (400) is embedded in the inner groove, the protective layer B (402) is sleeved on the outside of the protective layer A (400), and the filling layer A (401) is embedded in the gap between the protective layer A (400) and the protective layer B (402). The protective layer C (404) is fitted over the outside of the protective layer B (402), and the filling layer B (403) is embedded in the gap between the protective layer B (402) and the protective layer C (404); The protective layer D (406) is fitted over the outer side of the protective layer C (404), and the filling layer C (405) is embedded in the gap between the protective layer C (404) and the protective layer D (406).
2. A high toughness thick wall oil casing according to claim 1, characterized in that: The casing body (300) is provided with oil delivery pipe A (100) and oil delivery pipe B (200) at both ends respectively. The casing body (300) is symmetrically provided with internal and external threads at both ends. One end of the oil delivery pipe A (100) has an integrally fixed pipe joint A (101). The pipe joint A (101) is fitted onto one end of the casing body (300) and fixed with its threads. The casing body (300) is embedded inside the pipe joint A (101) and then abuts against the inner wall of the pipe joint A (101). One end of the oil transport pipe B (200) has an integrally fixed pipe joint B (201). The pipe joint B (201) is fitted onto the other end of the casing body (300) and fixed with its threads. The casing body (300) is embedded inside the pipe joint B (201) and then abuts against the inner wall of the pipe joint B (201).
3. A high toughness thick wall oil casing according to claim 1, characterized in that: The filling layers A (401), B (403), and C (405) are made of high-density sponge material.
4. A high toughness thick wall oil casing as defined in claim 1 wherein: The protective layer A (400) and the protective layer B (402) are made of rubber. The length of the protective layer B (402) is greater than the length of the protective layer A (400). The two ends of the protective layer B (402) wrap around the connection between the pipe joint A (101) and the casing body (300) and the connection between the pipe joint B (201) and the casing body (300).
5. A high toughness thick wall oil casing as defined in claim 1 wherein: The protective layer C (404) and the protective layer D (406) are made of metal.
6. A high toughness thick wall oil casing according to claim 1, characterized by: The diameters of the protective layers B (402), C (404), and D (406) are larger than the diameter of the pipe joint B (201).