A high-sealing, carbon dioxide corrosion-resistant, heat-insulating oil casing

Abstract

This utility model discloses a high-sealing, carbon dioxide corrosion-resistant, heat-insulating oil casing, specifically relating to the field of heat-insulating oil casing technology. It includes a pipe body and a coupling. The coupling is threadedly connected to the outer end of the pipe body. A fixing plate is fixedly installed on one side of the outer surface of the pipe body. The fixing plate has multiple fixing holes inside, and two springs are fixedly installed on the inner top surface of each fixing hole. In practical operation, the end of the pipe body is inserted into the coupling and rotated to achieve a threaded connection. Under the elastic action of the springs, a limiting hook extends to the side outside the fixing hole and inserts into the limiting hole of the connecting plate, thus engaging with the threaded connection to assemble and connect the pipe body and the coupling. The elastic force of the springs provides continuous clamping force, effectively offsetting the preload attenuation caused by vibration. The insertion and engagement of the limiting hook and the limiting hole further restricts axial displacement, effectively preventing loosening between the pipe body and the coupling from affecting the transport of heavy oil.

Description

Technical Field

[0001] This utility model relates to the field of heat insulation oil casing technology, and in particular to a heat insulation oil casing with high sealing performance and resistance to carbon dioxide corrosion. Background Technology

[0002] Heavy oil has high viscosity, but it is extremely sensitive to temperature. The main principle of heavy oil thermal recovery is to heat the underground heavy oil through various methods and approaches, so that its temperature increases, its viscosity decreases, and its fluidity increases, thereby enabling extraction. In the process of heavy oil thermal recovery, large-diameter corrosion-resistant and heat-insulated casings are usually used to transport heavy oil.

[0003] Currently, when using heat insulation sleeves, they are generally connected to couplings via threaded connections. However, the vibration of the pump during operation is transmitted to the connection between the coupling and the pipe body. Prolonged vibration can easily cause the preload of the threaded connection to decrease, resulting in loosening between the pipe body and the coupling, which affects the normal transportation of heavy oil. Therefore, in order to solve the above defects, the inventors propose a heat insulation sleeve with high sealing performance and resistance to carbon dioxide corrosion. Utility Model Content

[0004] The main purpose of this utility model is to provide a high-sealing, carbon dioxide corrosion-resistant, heat-insulating oil sleeve, which can effectively solve the problem in the prior art where the pre-tightening force of the threaded connection at the connection between the coupling and the heat-insulating sleeve is easily reduced due to long-term vibration, resulting in loosening between the pipe body and the coupling.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A high-sealing, carbon dioxide corrosion-resistant, heat-insulating oil casing includes a pipe body and a coupling. The coupling is threaded to the outer end of the pipe body. A fixing plate is fixedly installed on one side of the outer surface of the pipe body. The fixing plate has multiple fixing holes inside. Two springs are fixedly installed on the inner top surface of the fixing holes. A limit hook is fixedly installed inside the fixing holes, and one side of the limit hook extends to the outside of the fixing holes.

[0007] Preferably, the limiting hook is fixedly connected to two springs, a connecting plate is fixedly installed on the outer surface of the coupling, and multiple limiting holes are opened on the side of the connecting plate.

[0008] Preferably, a first sealing groove is provided at the outer end of the tube body, and a first sealing ring is fixedly installed inside the first sealing groove; a second sealing groove is provided on the inner wall of the coupling, and a second sealing ring is fixedly installed inside the second sealing groove.

[0009] Preferably, the tube body includes an inner layer, an outer layer is provided on the outer surface of the inner layer, and a heat insulation layer is provided between the outer layer and the inner layer.

[0010] Preferably, the inner wall of the inner layer is provided with a spiral groove, and a reinforcing rib is embedded inside the spiral groove.

[0011] Preferably, a silicone pad is fixedly installed on the side of the limiting hook that extends outside the fixing hole.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This utility model discloses a high-sealing, carbon dioxide corrosion-resistant, heat-insulating oil casing. In actual operation, the end of the pipe body is inserted into the inside of the coupling and rotated to make the pipe body and the coupling threaded together. The first sealing ring and the second sealing ring will seal the connection between the pipe body and the coupling. Under the elastic action of the spring, the limiting hook can extend to the side outside the fixing hole and insert into the limiting hole of the connecting plate, and then cooperate with the threaded connection to assemble and connect the pipe body and the coupling. The elastic force of the spring provides a continuous clamping force, which effectively counteracts the attenuation of the pre-tightening force caused by vibration. The insertion and cooperation of the limiting hook and the limiting hole further restricts axial displacement, effectively avoiding the impact of loosening between the pipe body and the coupling on the transportation of heavy oil. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a side view of the tube body structure of this utility model;

[0016] Figure 3 This is a cross-sectional view of the fixing plate of this utility model;

[0017] Figure 4 For the present utility model Figure 3 Enlarged view of section A in the middle;

[0018] Figure 5 This is a schematic cross-sectional view of the coupling structure of this utility model;

[0019] Figure 6 For the present utility model Figure 5 Enlarged view of section B;

[0020] Figure 7 This is a schematic diagram of the tube structure of this utility model;

[0021] Figure 8 This is a schematic diagram of the reinforcing rib structure of this utility model.

[0022] In the diagram: 1. Pipe body; 2. Coupling; 101. First sealing ring; 102. Fixing plate; 103. First sealing groove; 1011. Fixing hole; 1012. Spring; 1013. Limiting hook; 201. Connecting plate; 202. Limiting hole; 203. Second sealing ring; 204. Second sealing groove; 1021. Inner layer; 1022. Heat insulation layer; 1023. Outer layer; 1031. Spiral groove; 1032. Reinforcing rib. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] This utility model discloses a high-sealing, carbon dioxide corrosion-resistant, heat-insulating oil sleeve, such as... Figure 1-8 As shown, it includes a pipe body 1 and a coupling 2. By connecting the pipe body 1 to the coupling and cooperating with external equipment, heavy oil can be transported.

[0025] The coupling 2 is threaded to the outer end of the pipe body 1. The inner wall of the coupling 2 is threaded and the outer end of the pipe body 1 is threaded. The end of the pipe body 1 is inserted into the coupling 2 to connect the two. In actual work, threads can be opened at both ends of the outer surface of the pipe body 1 according to actual needs.

[0026] A fixing plate 102 is fixedly installed on one side of the outer surface of the tube body 1. Multiple fixing holes 1011 are opened inside the fixing plate 102. Two springs 1012 are fixedly installed on the inner top surface of the fixing holes 1011. A limit hook 1013 is fixedly installed inside the fixing holes 1011, and one side of the limit hook 1013 extends to the outside of the fixing holes 1011. When the limit hook 1013 is manually pulled outward from the fixing holes 1011, the limit hook 1013 will squeeze the two springs 1012.

[0027] The limiting hook 1013 is fixedly connected to two springs 1012. A connecting plate 201 is fixedly installed on the outer surface of the coupling 2, and multiple limiting holes 202 are opened on the side of the connecting plate 201. The connecting plate 201, springs 1012 and limiting plate are all made of corrosion-resistant alloy.

[0028] When the pipe body 1 is threadedly connected to the coupling 2, the connecting plate 201 will gradually approach the fixing plate 102. At this time, the operator manually pulls the limiting hook 1013 to move it outward from the fixing hole 1011. When the fixing plate 102 contacts the connecting plate 201, the limiting hook 1013 can be released. The compressed spring 1012 will drive the limiting hook 1013 to reset, so that the limiting hook 1013 is inserted into the limiting hole 202. The elastic force of the spring 1012 provides a continuous clamping force, which effectively counteracts the attenuation of the pre-tightening force caused by vibration. The insertion and cooperation between the limiting hook 1013 and the limiting hole 202 further restricts the axial displacement.

[0029] A silicone pad is fixedly installed on one side of the limiting hook 1013 extending to the outside of the fixing hole 1011. When the limiting hook 1013 extends to the outside of the fixing hole 1011 and is inserted into the fixing hole 1011, the silicone pad will contact the inner wall of the fixing hole 1011, and the silicone pad will deform to increase the friction.

[0030] A first sealing groove 103 is provided at the end of the outer surface of the pipe body 1, and a first sealing ring 101 is fixedly installed inside the first sealing groove 103. A second sealing groove 204 is provided on the inner wall of the coupling 2, and a second sealing ring 203 is fixedly installed inside the second sealing groove 204. The first sealing ring 101 is made of fluororubber, while the second sealing ring 203 is made of hydrogenated nitrile rubber. When the pipe body 1 and the coupling 2 are threaded together, the first sealing ring 101 and the second sealing ring 203 can improve the sealing performance at the connection between the pipe body 1 and the coupling 2.

[0031] Two independent sealing interfaces, the first sealing ring 101 and the second sealing ring 203, are used to form a redundant structure of primary and secondary seals.

[0032] The pipe body 1 includes an inner layer 1021, and an outer layer 1023 is provided on the outer surface of the inner layer 1021. The threads and fixing plate 102 of the pipe body 1 are provided on the outer surface of the outer layer 1023, and a heat insulation layer 1022 is provided between the outer layer 1023 and the inner layer 1021. The inner layer 1021 is made of nickel-based alloy material and is coated with a silicon carbide ceramic layer to resist carbon dioxide corrosion. The outer layer 1023 is made of high-strength alloy steel and has a nickel-based alloy coating on its outer surface to resist carbon dioxide corrosion.

[0033] The insulation layer 1022 is made of aerogel, which has a low thermal conductivity, significantly reducing heat loss from the pipe body 1 and effectively improving the insulation effect of the pipe body 1. This effectively prevents the heavy oil from becoming viscous during transportation due to rapid heat loss.

[0034] In practice, the material of the pipe body 1 and the coating material can be changed according to the actual situation, and there are no restrictions on this.

[0035] The inner wall of the inner layer 1021 is provided with a spiral groove 1031, and a reinforcing rib 1032 is embedded inside the spiral groove 1031. The reinforcing rib 1032 is spiral and is made of high-strength steel wire, which improves the tube body 1's resistance to internal pressure deformation.

[0036] The working principle of this utility model is as follows: The user inserts the end of the pipe body 1 into the inside of the coupling 2 and rotates it to make the pipe body 1 and the coupling 2 threadedly connected. The connecting plate 201 will gradually approach the fixing plate 102. At this time, the operator manually pulls the limiting hook 1013 to move it outward from the fixing hole 1011. The limiting hook 1013 will squeeze the two springs 1012. When the fixing plate 102 contacts the connecting plate 201, the limiting hook 1013 can be released. The squeezed spring 1012 will drive the limiting hook 1013 to reset, so that the limiting hook 1013 is inserted into the limiting hole 202. The elastic force of the spring 1012 provides a continuous clamping force, which effectively counteracts the attenuation of the pre-tightening force caused by vibration. The insertion and cooperation of the limiting hook 1013 and the limiting hole 202 further restricts the axial displacement. When the pipe body 1 and the coupling 2 are threadedly connected, the first sealing ring 101 and the second sealing ring 203 can improve the sealing performance of the connection between the pipe body 1 and the coupling 2.

[0037] All of the above-mentioned components are general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0038] The specific model specifications of components such as the first sealing ring 101, the second sealing ring 203, and the reinforcing rib 1032 proposed in this application need to be selected and determined according to the actual specifications of the device. The specific selection calculation method and connection method all adopt the existing technology in this field, so they will not be described in detail here.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-sealing, carbon dioxide corrosion-resistant, heat-insulating oil casing, comprising a pipe body (1) and a coupling (2), characterized in that: The coupling (2) is threaded to the outer surface end of the pipe body (1). A fixing plate (102) is fixedly installed on one side of the outer surface of the pipe body (1). Multiple fixing holes (1011) are opened inside the fixing plate (102). Two springs (1012) are fixedly installed on the inner top surface of the fixing holes (1011). A limit hook (1013) is fixedly installed inside the fixing holes (1011), and one side of the limit hook (1013) extends to the outside of the fixing holes (1011).

2. The high-sealing, carbon dioxide corrosion-resistant, heat-insulating oil sleeve according to claim 1, characterized in that: The limiting hook (1013) is fixedly connected to two springs (1012), and a connecting plate (201) is fixedly installed on the outer surface of the coupling (2), and multiple limiting holes (202) are opened on the side of the connecting plate (201).

3. The high-sealing, carbon dioxide corrosion-resistant, heat-insulating oil sleeve according to claim 1, characterized in that: The outer surface end of the tube body (1) is provided with a first sealing groove (103), and a first sealing ring (101) is fixedly installed inside the first sealing groove (103). The inner wall of the coupling (2) is provided with a second sealing groove (204), and a second sealing ring (203) is fixedly installed inside the second sealing groove (204).

4. The high-sealing, carbon dioxide corrosion-resistant, heat-insulating oil sleeve according to claim 1, characterized in that: The tube body (1) includes an inner layer (1021), an outer layer (1023) is provided on the outer surface of the inner layer (1021), and a heat insulation layer (1022) is provided between the outer layer (1023) and the inner layer (1021).

5. The high-sealing, carbon dioxide corrosion-resistant, heat-insulating oil sleeve according to claim 4, characterized in that: The inner wall of the inner layer (1021) is provided with a spiral groove (1031), and a reinforcing rib (1032) is embedded inside the spiral groove (1031).

6. The high-sealing, carbon dioxide corrosion-resistant, heat-insulating oil sleeve according to claim 1, characterized in that: A silicone pad is fixedly installed on one side of the limiting hook (1013) extending outside the fixing hole (1011).

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