Multi-stage pulse tube circulation heavy oil thermal recovery device

Abstract

The utility model relates to the technical field of thermal recovery, and discloses a multistage pulse tube circulation heavy oil thermal recovery device which comprises a collecting pipe and a multistage pulse cavity, a channel pipe is fixedly connected to the bottom of the collecting pipe, and the bottom of the channel pipe is fixedly connected with the top end of the multistage pulse cavity. The multi-stage pulse cavity comprises a fifth-stage pulse cavity, a fourth-stage pulse cavity, a third-stage pulse cavity, a second-stage pulse cavity and a first-stage pulse cavity in sequence from top to bottom, the top end and the bottom end of each stage of pulse cavity are respectively provided with a flow guide port and are connected in sequence, and a ball valve assembly is arranged in a pipeline connected with the bottom of the first-stage pulse cavity. The multi-stage pulse cavity is arranged, all stages of pulse tubes work cooperatively, the fluid temperature is gradually increased, the heat transfer efficiency is enhanced, the ball valve assembly accurately controls one-way flowing of fluid, pulse motion is matched, the flowing path and the heat exchange process of the fluid in the tube are optimized, ordered heat transfer and stable fluid lifting are ensured, the structure is compact, and the structure is compact. And the device adapts to underground limited space.

Description

Technical Field

[0001] This utility model relates to the field of thermal recovery technology, specifically a multi-stage pulse circulation heavy oil thermal recovery device. Background Technology

[0002] Heavy oil constitutes a large proportion of oil and gas resources, making its extraction and recovery a current research hotspot. However, heavy oil differs from conventional crude oil primarily due to its high viscosity, making it difficult to extract using conventional methods and thus requiring specialized technological measures. Thermal recovery is currently the main technology for heavy oil extraction.

[0003] However, traditional heavy oil heating methods are often limited by the confined space downhole, resulting in unchanged operation and generally low efficiency. Therefore, improvements to existing equipment are necessary. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a multi-stage pulse circulation heavy oil thermal recovery device, which solves the problems mentioned in the background.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage pulse circulation heavy oil thermal recovery device, comprising a collection pipe and a multi-stage pulse chamber, characterized in that: a channel pipe is fixedly connected to the bottom of the collection pipe, the bottom of the channel pipe is fixedly connected to the top of the multi-stage pulse chamber, the multi-stage pulse chamber is arranged from top to bottom as a five-stage pulse chamber, a four-stage pulse chamber, a three-stage pulse chamber, a two-stage pulse chamber and a one-stage pulse chamber, each pulse chamber has a guide port at its top and bottom, which are connected in sequence, each pulse chamber has a pulse body inside, the upper and lower ends of which are fixedly connected to the inner wall of the pulse chamber through connecting rods, a ball valve assembly is arranged in the pipe connected to the bottom of the one-stage pulse chamber, which comprises a valve chamber and a ball, a vertical filter screen is arranged in the middle of the inner wall of the valve chamber, and the ball is placed inside the valve chamber.

[0006] Preferably, the top and bottom guide ports of each pulse cavity are connected end to end in sequence. The number of pulse cavities contained in the multi-stage pulse cavity can be increased or decreased according to the actual situation. The pulse bodies in each pulse cavity are connected by a central axis.

[0007] Preferably, a sealing ring is provided at the bottom of the inner wall of the valve chamber, and the size of the ball is larger than the bottom opening of the valve chamber.

[0008] This utility model provides a multi-stage pulse circulation heavy oil thermal recovery device, which has the following beneficial effects:

[0009] (1) This utility model is equipped with multi-stage pulse chambers. Through the coordinated work of each stage of the pulse tube, the fluid temperature is gradually increased, the heat transfer efficiency is enhanced, the ball valve assembly accurately controls the unidirectional flow of the fluid, and in conjunction with the pulse motion, optimizes the flow path and heat exchange process of the fluid in the tube, ensuring orderly heat transfer and stable fluid lifting. The structure is compact and adaptable to the limited space downhole.

[0010] (2) This utility model integrates the collection pipe with the walking beam oil pump and uses its up-and-down reciprocating motion as a power source, eliminating the need for additional complex power devices, simplifying the overall structure, and ensuring the stability and reliability of the device downhole. Attached Figure Description

[0011] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0012] Figure 2 This is a schematic diagram of the structure of the ball valve assembly of this utility model;

[0013] Figure 3 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 4 This is a top view of the bottom structure of the pulse body of this utility model;

[0015] Figure 5 This is a top view of the structure of the pulse body of this utility model;

[0016] In the diagram: 1. Collection tube; 2. Multi-stage pulse chamber; 3. Channel tube; 4. Five-stage pulse chamber; 5. Four-stage pulse chamber; 6. Three-stage pulse chamber; 7. Two-stage pulse chamber; 8. One-stage pulse chamber; 9. Pulse body; 10. Connecting rod; 11. Ball valve assembly; 12. Valve chamber; 13. Ball; 14. Filter screen; 15. Central shaft. Detailed Implementation

[0017] 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.

[0018] like Figure 1-4As shown, this utility model provides a technical solution: a multi-stage pulse circulation heavy oil thermal recovery device, including a collection pipe 1 and a multi-stage pulse chamber 2. A channel pipe 3 is fixedly connected to the bottom of the collection pipe 1, and the bottom of the channel pipe 3 is fixedly connected to the top of the multi-stage pulse chamber 2. The multi-stage pulse chamber 2 consists of a five-stage pulse chamber 4, a four-stage pulse chamber 5, a three-stage pulse chamber 6, a two-stage pulse chamber 7, and a one-stage pulse chamber 8 from top to bottom. Each pulse chamber has a guide port at its top and bottom, which are connected in sequence. Each pulse chamber has a pulse body 9 inside, and its upper and lower sides are connected by a connecting rod 1. The 0 is fixedly connected to the inner wall of the pulse chamber. Each stage of the pulse chamber works in concert to gradually increase the fluid temperature and enhance heat transfer efficiency. It has a compact structure and is suitable for the limited space downhole. The bottom of the first-stage pulse chamber 8 is connected to a pipe with a ball valve assembly 11, which consists of a valve chamber 12 and a ball 13. A vertical filter screen 14 is set in the middle of the inner wall of the valve chamber 12. The ball 13 is placed inside the valve chamber 12, which can accurately control the unidirectional flow of the fluid. In conjunction with the pulse motion, it optimizes the flow path of the fluid in the pipe and the heat exchange process, ensuring orderly heat transfer and stable fluid lifting.

[0019] Furthermore, the top and bottom guide ports of each pulse cavity are connected end to end in sequence. The number of pulse cavities contained in the multi-stage pulse cavity 2 can be increased or decreased according to the actual situation to achieve the ideal mining temperature. The pulse bodies 9 in each pulse cavity are connected by the central shaft 15, which can further improve the stability of the device operation, reduce the frequency of failures and maintenance, and ensure the continuity of production.

[0020] Furthermore, a sealing ring is provided at the bottom of the inner wall of the valve chamber 12 to improve the sealing performance, and the size of the ball 13 is larger than the bottom opening of the valve chamber 12.

[0021] In summary, the workflow of this utility model is as follows: First, the collection pipe 1 is connected to the lower end of the walking beam oil pump. After assembly, it is lowered into the oil well using specialized downhole equipment, ensuring that the device is located at a predetermined position below the fluid level at the bottom of the well. The walking beam oil pump is then started, causing it to reciprocate up and down. When the pump moves downward, it applies pressure to the fluid in the pulse chamber, compressing and heating the fluid. When the pump moves upward, the pressure decreases, and the heated fluid, under the control of the pulse force and the ball valve assembly 11, flows layer by layer from the first-stage pulse chamber 8 to the fifth-stage pulse chamber 4. Each time it passes through a pulse chamber, it absorbs more heat, and the temperature continuously rises. By adding multiple pulse chambers, the ideal extraction temperature can be achieved. The heated heavy oil is then extracted from the last-stage pulse chamber by the suction of the oil pump and transported to the surface processing facility through the channel pipe 3 via the collection pipe 1 for subsequent oil and gas separation and processing, achieving efficient extraction and collection of heavy oil.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] 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 multi-stage pulse circulation heavy oil thermal recovery device, comprising a collection pipe (1) and a multi-stage pulse chamber (2), characterized in that: The bottom of the collection tube (1) is fixedly connected to the channel tube (3), and the bottom of the channel tube (3) is fixedly connected to the top of the multi-stage pulse cavity (2). The multi-stage pulse cavity (2) consists of a five-stage pulse cavity (4), a four-stage pulse cavity (5), a three-stage pulse cavity (6), a two-stage pulse cavity (7), and a first-stage pulse cavity (8) from top to bottom. Each pulse cavity has a guide port at the top and bottom, which are connected in sequence. Each pulse cavity has a pulse body (9) inside, and its upper and lower sides are fixedly connected to the inner wall of the pulse cavity through a connecting rod (10). The bottom of the first-stage pulse cavity (8) is connected to a pipe with a ball valve assembly (11), which consists of a valve chamber (12) and a ball (13). The middle of the inner wall of the valve chamber (12) is provided with a vertical filter screen (14), and the ball (13) is placed inside the valve chamber (12).

2. The multi-stage pulse circulation heavy oil thermal recovery device according to claim 1, characterized in that: The top and bottom guide ports of each pulse cavity are connected end to end in sequence. The number of pulse cavities contained in the multi-stage pulse cavity (2) can be increased or decreased according to the actual situation. The pulse bodies (9) in each pulse cavity are connected by the central shaft (15).

3. The multi-stage pulse circulation heavy oil thermal recovery device according to claim 1, characterized in that: A sealing ring is provided at the bottom of the inner wall of the valve chamber (12), and the size of the ball (13) is larger than the bottom opening of the valve chamber (12).

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