Electric heating heavy oil well injection-production pipe

Abstract

The utility model relates to the technical field of oil extraction pipes, in particular to an injection-production pipe for an electric heating heavy oil well. The injection-production pipe of the electric heating heavy oil well comprises an injection-production well pipe body, the outer wall of the injection-production well pipe body is sleeved with symmetrically-distributed supporting discs, and heat preservation assemblies are installed on the supporting discs and the injection-production well pipe body. According to the injection-production pipe of the electric heating heavy oil well, in the using process, the heat preservation barrel arranged outside the end opening of the injection-production well pipe in the heat preservation assembly in the sleeving mode can cover the end of the injection-production well pipe for heat preservation, and therefore the probability that the end opening of the injection-production well pipe is frozen when the air temperature is relatively low in winter can be reduced, and the service life of the injection-production well pipe is prolonged. And the influence on later oil extraction is reduced.

Description

Technical Field

[0001] This utility model relates to the field of oil production tubing technology, and in particular to an electrically heated heavy oil well injection and production tubing. Background Technology

[0002] Heavy oil, due to its high viscosity, exhibits extremely poor fluidity under conventional extraction conditions, resulting in low extraction efficiency. Traditional extraction methods, such as mechanical pumping and water displacement, are often ineffective and costly when dealing with heavy oil. Electric heating technology, as a means of heavy oil extraction, primarily aims to reduce the viscosity of heavy oil and improve its fluidity through heating. Heavy oil well injection and production tubing is a complex system engineering project, its design and configuration entirely dependent on the extraction technology employed (steam injection, SAGD, etc.). It is not merely a pipeline, but a high-strength, high-temperature, and high-pressure resistant tool assembly integrating multiple functions such as steam injection, sealing, compensation, lifting, and monitoring. It is a key technological equipment for the efficient development of heavy oil resources.

[0003] Due to the low winter temperatures in some areas, oil wellheads are prone to freezing, which greatly affects the oil production work of operators in winter. When the wellhead pipeline is frozen, the entire pipeline may become inoperable, greatly increasing the operating costs.

[0004] Therefore, it is necessary to provide a new electrically heated injection and production pipe for heavy oil wells to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an electrically heated heavy oil well injection and production pipe.

[0006] The electrically heated heavy oil well injection and production pipe provided by this utility model includes: an injection and production well pipe, on which symmetrically distributed support discs are sleeved, and heat insulation components are installed on the support discs and the injection and production well pipe;

[0007] The heat preservation component includes a heating barrel and a heat preservation barrel. The heating barrel is fixedly installed on the top of the support plate. A heating wire is fixedly connected inside the heating barrel. The heat preservation barrel is sleeved on the outer wall of the injection and production well pipe. A connecting pipe is fixedly installed between the top and bottom of the heating barrel and the heat preservation barrel. A blade for conveying air is installed inside the lower connecting pipe.

[0008] Preferably, the top end of the injection-production well pipe is provided with an auxiliary component, the auxiliary component including a guide cylinder, the guide cylinder being sleeved on the top end of the injection-production well pipe, the bottom end of the guide cylinder being fixedly connected to the top end of the insulation bucket, and a fixedly connected sealing rubber ring being installed inside the guide cylinder.

[0009] Preferably, the guide cylinder has a trumpet-shaped structure.

[0010] Preferably, the two support plates are fixedly connected by bolts, and the top of the support plate is fixedly connected to the bottom of the insulation bucket.

[0011] Preferably, a spiral partition is fixedly installed inside the heat preservation bucket. The spiral partition can divide the inside of the heat preservation bucket into multiple interconnected spiral cavities, and each spiral cavity is equipped with a connected heat-conducting plate.

[0012] Preferably, a rotating rod is installed at the center of the connecting pipe with blades, and the outer wall of the rotating rod is fixedly connected to the blades.

[0013] Preferably, a drive rod is rotatably connected to the rotating rod on one side inside the connecting pipe. The drive rod and the rotating rod are connected by a toothed belt drive, and a drive motor for rotating the drive rod is fixedly installed on the outer wall of the connecting pipe.

[0014] Compared with related technologies, the electrically heated heavy oil well injection and production pipe provided by this utility model has the following beneficial effects:

[0015] 1. This utility model, through the setting of the heat insulation component, can cover and insulate the end of the injection and production well pipe by the heat insulation bucket fitted outside the injection and production well pipe port during use, thereby reducing the probability of the injection and production well pipe port freezing when the winter temperature is relatively low, and reducing the impact on subsequent oil production.

[0016] 2. By setting up auxiliary components, the relatively large top guide cylinder in the auxiliary components can guide the casing to be inserted later, which makes the alignment and positioning of the casing more convenient. After the casing is inserted, the inner wall of the sealing rubber ring inside the guide cylinder can abut against the outer wall of the casing, thereby sealing the outer wall of the inserted casing and helping to improve the heat preservation effect of the device on the top port of the injection and production well pipe. Attached Figure Description

[0017] Figure 1 A schematic diagram of a preferred embodiment of the electrically heated heavy oil well injection and production pipe provided by this utility model;

[0018] Figure 2 for Figure 1 A partial cross-sectional structural diagram of the heating tank and its components is shown.

[0019] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the connection between the support plate and the insulation barrel shown.

[0020] Figure 4 for Figure 1 A partial cross-sectional structural diagram of the auxiliary component shown.

[0021] The following are the labels in the diagram: 1. Injection / production well casing; 2. Support plate; 3. Insulation component; 31. Heating tank; 311. Heating wire; 312. Connecting pipe; 32. Insulation tank; 321. Spiral separator; 322. Heat-conducting plate; 33. Rotating rod; 331. Blade; 34. Drive rod; 341. Drive motor; 4. Auxiliary component; 41. Guide cylinder; 42. Sealing rubber ring. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0024] Please see Figures 1 to 4 The present invention provides an electrically heated heavy oil well injection and production pipe, which includes an injection and production well pipe 1.

[0025] In the embodiments of this utility model, please refer to Figures 1 to 4 Symmetrically distributed support plates 2 are fitted onto the outer wall of the injection-production well pipe 1, and insulation components 3 are installed on the support plates 2 and the injection-production well pipe 1. The insulation component 3 includes a heating barrel 31 and an insulation barrel 32. The heating barrel 31 is fixedly installed on the top of the support plate 2, and a fixedly connected heating wire 311 is installed inside the heating barrel 31. The insulation barrel 32 is fitted onto the outer wall of the injection-production well pipe 1, and connecting pipes 312 are fixedly installed between the top and bottom of the heating barrel 31 and the insulation barrel 32. The interior of the lower connecting pipe 312 is... The tube 31 is equipped with blades 331 for conveying air. A rotating rod 33 is rotatably connected to the center of the connecting tube 312 with blades 331. The outer wall of the rotating rod 33 is fixedly connected to the blades 331. A drive rod 34 is rotatably connected to one side of the connecting tube 312 corresponding to the rotating rod 33. The drive rod 34 and the rotating rod 33 are connected by a toothed belt drive. A drive motor 341 for rotating the drive rod 34 is fixedly installed on the outer wall of the connecting tube 312.

[0026] It should be noted that during use, when the blade 331 rotates, the air heated by the heating wire 311 is transported to the inside of the insulation tank 32 through the connecting pipe 312 for heating. The heated insulation tank 32 can then cover and insulate the end of the injection-production well pipe 1, thereby reducing the probability of the injection-production well pipe 1 freezing at the end when the winter temperature is relatively low, and reducing the impact on subsequent oil production.

[0027] In this embodiment, by placing the drive motor 341 on the outer wall of the connecting pipe 312, the influence of the hot air inside the connecting pipe 312 on the drive motor 341 during use can be reduced. The drive motor 341 is an explosion-proof motor.

[0028] In the embodiments of this utility model, please refer to Figures 1 to 4 An auxiliary component 4 is provided at the top of the injection-production well pipe 1. The auxiliary component 4 includes a guide cylinder 41, which is sleeved on the top of the injection-production well pipe 1. The bottom end of the guide cylinder 41 is fixedly connected to the top of the heat preservation bucket 32, and a fixedly connected sealing rubber ring 42 is installed inside the guide cylinder 41.

[0029] It should be noted that: since the guide cylinder 41 has a trumpet-shaped structure, the relatively large top size of the guide cylinder 41 can guide the casing to be inserted later, which makes the alignment and positioning of the casing more convenient. After the casing is inserted, the inner wall of the sealing rubber ring 42 inside the guide cylinder 41 can abut against the outer wall of the casing, thereby sealing the outer wall of the inserted casing and helping to improve the heat preservation effect of the device on the top port of the injection and production well pipe 1.

[0030] It should also be noted that the guide cylinder 41 and the insulation cylinder 32 are fixedly connected by bolts. Therefore, in actual use, the staff can disassemble and replace the guide cylinder 41 according to the specifications of the insert sleeve, so that the guide cylinder 41 and the sealing rubber ring 42 that are compatible with the specifications of the sleeve can be selected. This makes the inner wall of the sealing rubber ring 42 fit more tightly with the outer wall of the insert sleeve, reducing the impact of the sealing rubber ring 42 on the sealing effect due to the difference between the specifications of the sealing rubber ring 42 and the sleeve.

[0031] In the embodiments of this utility model, please refer to Figures 1 to 4 The two support plates 2 are fixedly connected by bolts, and the top of the support plate 2 is fixedly connected to the bottom of the heat preservation barrel 32. A spiral partition plate 321 is fixedly installed inside the heat preservation barrel 32. The spiral partition plate 321 can divide the inside of the heat preservation barrel 32 into multiple interconnected spiral cavities, and each spiral cavity is equipped with a connected heat-conducting plate 322.

[0032] It should be noted that: by setting the spiral separator 321 and the heat-conducting plate 322, the spiral separator 321 forms a connected cavity inside the heat-insulating barrel 32 during use, which can increase the flow path of hot air inside the heat-insulating barrel 32. In this process, the hot air can be conducted to the outer wall of the injection-production well pipe 1 through the heat-conducting plate 322, thereby achieving heat preservation of the end of the injection-production well pipe 1.

[0033] The working principle of the electrically heated heavy oil well injection and production pipe provided by this utility model is as follows:

[0034] When using this device, the support plate 2 in the device can be fixed to the outside of the injection and production well pipe 1 with bolts to form a whole;

[0035] Then, the heating barrel 31 in the insulation component 3 can be installed on the support plate 2, and the insulation barrel 32 can be sleeved on the outside of the injection-production well pipe 1. Next, the guide cylinder 41 in the auxiliary component 4 can be taken out and sleeved on the top of the injection-production well pipe 1, and the bottom end of the guide cylinder 41 can be fixedly connected to the top of the insulation barrel 32. The installation of this device can be completed.

[0036] After the installation of the device is completed, when it is necessary to keep the port of the injection-production well pipe 1 warm, the heating wire 311 and the drive motor 341 inside the heating tank 31 can be controlled to work synchronously. The working drive motor 341 will drive the drive rod 34 at the output end to rotate. The rotating drive rod 34 will drive the rotating rod 33 and the blades 331 on its outer wall to rotate through the toothed belt sleeved between it and the rotating rod 33. At this time, the rotating blades 331 can transport the heated air inside the heating tank 31 to the heat preservation tank 32 through the connecting pipe 312.

[0037] The hot air entering the insulation tank 32 will circulate along the cavity formed by the spiral partition plate 321 inside the insulation tank 32, thereby increasing the circulation path of the hot air inside the insulation tank 32. In this process, the hot air can be conducted to the outer wall of the injection and production well pipe 1 through the heat conduction plate 322, thereby achieving heat preservation of the end of the injection and production well pipe 1.

[0038] In subsequent use, when the casing needs to be inserted into the injection-production well pipe 1, the relatively large top guide cylinder 41 can guide the inserted casing, making the alignment and positioning of the casing insertion more convenient. After the casing is inserted, the inner wall of the sealing rubber ring 42 inside the guide cylinder 41 can abut against the outer wall of the casing, thereby sealing the outer wall of the inserted casing and helping to improve the heat preservation effect of the device on the top port of the injection-production well pipe 1.

[0039] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0040] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An electrically heated heavy oil well injection and production tubing, characterized by, The utility model relates to an injection-production well pipe, which comprises a support disc (2) symmetrically arranged on the outer wall of the injection-production well pipe (1), and a heat preservation assembly (3) installed on the support disc (2) and the injection-production well pipe (1). The heat preservation assembly (3) comprises a heating barrel (31) and a heat preservation barrel (32), the heating barrel (31) is fixedly installed on the top of the support disc (2), the heating barrel (31) is internally provided with a heating wire (311) fixedly connected, the heat preservation barrel (32) is arranged on the outer wall of the injection-production well pipe (1), and the top and the bottom of the heating barrel (31) are fixedly connected with the heat preservation barrel (32) through a communication pipe (312), and the inside of the lower communication pipe (312) is provided with a blade (331) for conveying air. The top of the injection-production well pipe (1) is provided with an auxiliary assembly (4), the auxiliary assembly (4) comprises a guide cylinder (41), the guide cylinder (41) is arranged on the top of the injection-production well pipe (1), the bottom of the guide cylinder (41) is fixedly connected with the top of the heat preservation barrel (32), and the inside of the guide cylinder (41) is provided with a sealing rubber ring (42) fixedly connected.

2. The electrically heated heavy oil well injection and production tubing of claim 1, wherein, The guide cylinder (41) is in a horn shape.

3. The electrically heated heavy oil well injection and production tubing of claim 2, wherein, The two support discs (2) are fixedly connected through bolts, and the top of the support disc (2) is fixedly connected with the bottom of the heat preservation barrel (32).

4. The electrically heated heavy oil well injection and production tubing of claim 1 or 2, wherein, The inside of the heat preservation barrel (32) is fixedly provided with a spiral partition plate (321), the inside of the heat preservation barrel (32) is divided into a plurality of spiral cavities in communication through the spiral partition plate (321), and each spiral cavity is internally provided with a heat conducting plate (322) connected.

5. The electrically heated heavy oil well injection and production tubing of claim 1 or 2 or 3, wherein, The center of the inside of the communication pipe (312) provided with the blade (331) is provided with a rotating rod (33) rotatably connected, and the outer wall of the rotating rod (33) is fixedly connected with the blade (331).

6. The electrically heated heavy oil well injection and production tubing of claim 5, wherein, The side of the inside of the communication pipe (312) corresponding to the rotating rod (33) is provided with a driving rod (34) rotatably connected, the driving rod (34) and the rotating rod (33) are drivingly connected through a toothed belt, and the outer wall of the communication pipe (312) is fixedly provided with a driving motor (341) for rotating and driving the driving rod (34).

7. The electrically heated heavy oil well injection and production tubing of claim 1 or 2 or 3 or 6, wherein, ​

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