High-temperature-resistant lining oil pumping pipe

Abstract

The utility model discloses a high-temperature-resistant lining oil pumping pipe, which relates to the technical field of oil exploitation and comprises an oil pumping pipe body, a lining pipe is arranged inside the oil pumping pipe body, the outer side of the oil pumping pipe body is in threaded connection with a coupling main body, and a sealing ring is fixedly connected inside the coupling main body. One end of the sealing ring abuts against one end of the oil pumping pipe body and one end of the lining pipe, the oil pumping pipe body is made of alloy steel materials, and a heat insulation layer is arranged on the outer side of the oil pumping pipe body. According to the oil pumping pipe with the high-temperature-resistant lining, the oil pumping pipe body made of alloy steel materials containing high chromium and nickel elements is combined with the heat insulation layer wrapped by the outer-layer heat-resistant fiber materials and the polytetrafluoroethylene lining pipe to form a composite material structure. Not only are many defects of a traditional pipeline in the high-temperature and high-pressure environment effectively overcome, but also the efficiency and the safety of the whole system are improved, and the strict requirements of modern oil exploitation for equipment are met.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction technology, and in particular to a high-temperature resistant inner-lined oil extraction pipe. Background Technology

[0002] With the continuous development of oil extraction technology, the demand for oil pumping pipes in high-temperature and high-pressure environments is increasing.

[0003] Traditional oil pumping tubing is prone to deformation, aging, and leakage under high-temperature conditions, affecting oil extraction efficiency and equipment safety. Therefore, developing a high-temperature resistant and corrosion-resistant lined oil pumping tubing is particularly important. To address these issues, we have launched a high-temperature resistant lined oil pumping tubing. Utility Model Content

[0004] This utility model discloses a high-temperature resistant lined oil pipe, which improves upon the existing structure and its shortcomings to provide a high-temperature resistant lined oil pipe with better practical value.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-temperature resistant lined oil extraction tube includes an oil extraction tube body, an inner liner tube disposed inside the oil extraction tube body, a coupling body threadedly connected to the outer side of the oil extraction tube body, a sealing ring fixedly connected inside the coupling body, one end of the sealing ring abutting against one end of the oil extraction tube body and one end of the inner liner tube, the oil extraction tube body being made of alloy steel, a heat insulation layer disposed on the outer side of the oil extraction tube body, and the inner liner tube being made of polytetrafluoroethylene.

[0007] In a preferred embodiment, the alloy steel material is an alloy steel material containing high levels of chromium and nickel.

[0008] In a preferred embodiment, the heat insulation layer is made of heat-resistant fiber material wrapped around the outside of the oil pipe body.

[0009] In a preferred embodiment, both the outer side of the sucker pipe body and the inner side of the coupling body adopt a tapered structure.

[0010] In a preferred embodiment, the sucker tube body and the inner liner are firmly bonded together by a specific adhesive.

[0011] The high-temperature resistant lined oil tubing provided by this utility model has the following advantages:

[0012] Firstly, the sucker pipe body is made of alloy steel containing high levels of chromium and nickel, combined with an outer heat-resistant fiber insulation layer and a polytetrafluoroethylene (PTFE) inner liner to form a composite material structure. The alloy steel body possesses superior high-temperature resistance, maintaining stable mechanical properties in high-temperature environments and significantly reducing deformation and strength loss caused by heat. Furthermore, the heat-resistant fiber insulation layer effectively resists the direct impact of external temperatures on the sucker pipe body, thereby reducing thermal fatigue, delaying aging, and extending the equipment's service life. The PTFE inner liner exhibits excellent corrosion resistance and a low coefficient of friction, effectively preventing oil from contacting metal surfaces, thus reducing the probability of corrosion and leakage and helping to maintain a good sealing effect. This composite material structure of the sucker pipe not only effectively solves many defects of traditional pipelines under high-temperature and high-pressure environments but also improves the efficiency and safety of the entire system, meeting the stringent requirements of modern oil extraction equipment.

[0013] Secondly, the outer side of the oil extraction pipe body and the inner side of the coupling body are connected by a tapered structure. The tapered structure can form a tighter seal during connection, reducing the possibility of fluid leakage. This is especially important for oil extraction, because even a small leak can lead to reduced efficiency or environmental pollution. Adding a sealing ring at the connection can prevent fluid leakage and ensure that the connection maintains good sealing performance. This is particularly critical for applications in high-pressure environments such as oil extraction pipes, and helps to improve the safety of the overall system. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of a high-temperature resistant inner-lined oil extraction pipe proposed in this utility model.

[0015] Figure 2 This is a cross-sectional schematic diagram of a high-temperature resistant inner-lined oil extraction pipe proposed in this utility model.

[0016] Figure 3 This is an exploded schematic diagram of a high-temperature resistant lined oil extraction pipe proposed in this utility model.

[0017] Figure 4 This is a schematic diagram of the internal structure of a high-temperature resistant lining oil pipe proposed in this utility model.

[0018] In the attached diagram: 1. Oil extraction pipe body; 2. Inner liner; 3. Coupling body; 4. Sealing ring; 5. Alloy steel material; 6. Insulation layer; 7. Polytetrafluoroethylene material. Detailed Implementation

[0019] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] It should be noted that, in the context of use, the terms up, down, left, right, front, back, top, bottom, forward, reverse, clockwise, and counterclockwise in the following description are used merely for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative positions and / or orientations between the various parts of the object and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] It should be noted that, in practice, unless otherwise explicitly specified and limited, the terms "installation," "fixing," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a structural connection or a mechanical connection; a direct connection or an indirect connection via an intermediate medium; or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] It should be noted that these and subsequent accompanying drawings are merely illustrative and are not drawn to scale, and should not be construed as limiting the scope of protection of this utility model. Furthermore, variations in different embodiments can be appropriately combined. The components of the embodiments described and marked in the accompanying drawings can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0023] The high-temperature resistant lined oil pipe disclosed in this utility model is mainly used in oil extraction scenarios.

[0024] Reference Figures 1 to 4A high-temperature resistant inner-lined oil pipe includes: an oil pipe body 1, an inner liner 2 inside the oil pipe body 1, a coupling body 3 threadedly connected to the outside of the oil pipe body 1, a sealing ring 4 fixedly connected inside the coupling body 3, one end of the sealing ring 4 abutting against one end of the oil pipe body 1 and the inner liner 2, the oil pipe body 1 being made of alloy steel material 5, a heat insulation layer 6 being provided on the outside of the oil pipe body 1, and the inner liner 2 being made of polytetrafluoroethylene material 7;

[0025] Alloy steel material 5 is an alloy steel material containing high levels of chromium and nickel.

[0026] The heat insulation layer 6 is made of heat-resistant fiber material and is wrapped on the outside of the oil pipe body 1.

[0027] In the above technical solution, considering that traditional oil extraction tubing is prone to deformation, aging, and leakage under high-temperature conditions, affecting oil extraction efficiency and equipment safety, the specific operation is as follows: The oil extraction tubing body 1 is made of alloy steel material 5 containing high levels of chromium and nickel. A heat-resistant fiber insulation layer 6 is applied to the outside of the oil extraction tubing body 1, and a polytetrafluoroethylene (PTFE) liner 2 is used. The alloy steel body possesses excellent high-temperature resistance, maintaining stable mechanical properties under high-temperature environments and reducing deformation and strength loss caused by high temperatures. The heat-resistant fiber insulation layer 6 effectively reduces the direct impact of external temperature on the oil extraction tubing body 1, reducing thermal fatigue and aging, and extending the service life of the oil extraction tubing. The PTFE liner 2 has excellent corrosion resistance and a low coefficient of friction, preventing oil from contacting metal and reducing the risk of corrosion and leakage. Its excellent elasticity also buffers the thermal expansion effect at high temperatures, helping to maintain sealing performance. This composite material structure oil extraction tubing not only solves many problems existing in traditional oil extraction tubing under high-temperature conditions but also improves overall efficiency and safety.

[0028] Reference Figures 1 to 4 In a preferred embodiment, both the outer side of the tubing body 1 and the inner side of the coupling body 3 adopt a tapered structure; the tapered structure can form a tighter seal when connected, reducing the possibility of fluid leakage, which is especially important for oil extraction, because even a small leak can lead to reduced efficiency or environmental pollution.

[0029] Reference Figures 1 to 4 In a preferred embodiment, the tubing body 1 and the inner liner 2 are firmly bonded together by a specific adhesive; the tubing body 1 and the inner liner 2 are bonded together by epoxy resin adhesive, which has excellent temperature and corrosion resistance, is suitable for use in high-temperature environments, can form a strong bond, and provides good mechanical properties.

[0030] Working Principle: In use, the sucker pipe body 1 is made of alloy steel material 5 containing high levels of chromium and nickel. A heat-resistant fiber insulation layer 6 is applied to the outside of the sucker pipe body 1, and a polytetrafluoroethylene (PTFE) liner 2 is used. The alloy steel body possesses excellent high-temperature resistance, maintaining stable mechanical properties under high-temperature environments and reducing deformation and strength loss caused by high temperatures. The heat-resistant fiber insulation layer 6 effectively reduces the direct impact of external temperature on the sucker pipe body 1, reducing thermal fatigue and aging, and extending the service life of the sucker pipe. The PTFE liner 2 has excellent corrosion resistance and a low coefficient of friction, preventing oil from contacting metal and reducing the risk of corrosion and leakage. Its excellent elasticity also buffers the thermal expansion effect at high temperatures, helping to maintain sealing performance. This composite material structure sucker pipe not only solves many problems existing in traditional sucker pipes under high-temperature conditions but also improves overall efficiency and safety. Content not described in detail in this specification belongs to existing technology known to those skilled in the art.

[0031] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A high-temperature resistant lined oil sucker pipe, comprising an oil sucker pipe body (1), characterized in that, The inner liner (2) is provided inside the oil sucker pipe body (1). The outer side of the oil sucker pipe body (1) is threaded with a coupling body (3). A sealing ring (4) is fixedly connected inside the coupling body (3). One end of the sealing ring (4) abuts against one end of the oil sucker pipe body (1) and the inner liner (2). The oil sucker pipe body (1) is made of alloy steel material (5). A heat insulation layer (6) is provided on the outer side of the oil sucker pipe body (1). The inner liner (2) is made of polytetrafluoroethylene material (7).

2. The high-temperature resistant lined oil pipe according to claim 1, characterized in that, The heat insulation layer (6) is made of heat-resistant fiber material and is wrapped on the outside of the oil pipe body (1).

3. The high-temperature resistant lined oil pipe according to claim 1, characterized in that, The outer side of the oil extraction pipe body (1) and the inside of the coupling body (3) both adopt a conical structure.

4. The high-temperature resistant lined oil pipe according to claim 1, characterized in that, The oil extraction pipe body (1) and the inner liner pipe (2) are firmly bonded together by an adhesive.

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