A jet pump for integrated fracturing and fluid drainage

Abstract

This utility model relates to the field of fluid pump technology and discloses an integrated jet pump for fracturing and drainage. It includes a pump body, a ball seat fixedly connected to the inner wall of the pump body, a retaining ball slidably connected to the inner wall of the ball seat, a second connector fixedly connected to the right side of the inner wall of the pump body, a first connector fixedly connected to the left side of the inner wall of the pump body, a sliding sleeve slidably connected to the middle of the inner wall of the pump body, a sliding sleeve hole formed on the outer wall of the sliding sleeve, a pin slidably connected to the bottom of the inner wall of the sliding sleeve, a third seal fixedly connected to the left side of the ball seat, and a second seal fixedly connected to the inner wall of the sliding sleeve hole. In this utility model, by placing the third seal at the upper part of the pump body and limiting the sliding sleeve to the pump body with the pin, the ball seat can support the sliding sleeve, achieving the purpose of bearing only the internal and external pressure difference during fracturing without bearing the vertical pressure difference, thus improving safety and practicality.

Description

Technical Field

[0001] This utility model relates to the field of fluid pump technology, and in particular to an integrated jet pump for fracturing and drainage. Background Technology

[0002] A jet pump is a special fluid transport device that uses the jet principle to achieve the suction and transport of liquids. When it is working, the working fluid of the pump is ejected at high speed from a high-pressure nozzle, forming a low-pressure area. Due to the low pressure at the nozzle outlet, liquid in the surrounding environment is sucked into the nozzle inlet. The sucked liquid and the ejected working fluid are mixed in the mixing chamber. Through momentum exchange, the sucked liquid gains energy. Finally, the mixed fluid passes through the diffuser, and the kinetic energy is converted into pressure energy and discharged at a higher pressure. Due to its special characteristics, its advantages and disadvantages are also very obvious.

[0003] The advantages of jet pumps are reliable operation, strong adaptability, and convenient start-up and shutdown. Reliability stems from their simple structure, lacking complex moving mechanical parts. Strong adaptability allows them to pump clean water, sewage, sludge, and other liquids containing particles, making them widely applicable. Convenient start-up and shutdown are due to the absence of rotating parts during operation, simplifying the process. Furthermore, there is no danger when flow is interrupted after the suction port is fully exposed above the water surface. The disadvantage is their relatively low efficiency, generally not exceeding 30%. In conclusion, despite their lower efficiency, jet pumps still possess unique application value in certain specialized fields.

[0004] Existing jet pumps are only suitable for ordinary formation fluid drainage and production, especially for fluid drainage and production after fracturing. They can only wait until the fracturing string is removed after the fracturing is completed, and then the drainage string is lowered for drainage. This cannot meet the needs of integrated fracturing and drainage, resulting in reduced practicality and safety. Summary of the Invention

[0005] To overcome the above shortcomings, this utility model provides an integrated jet pump for fracturing and drainage, aiming to improve the problem that existing jet pumps can only remove the fracturing tubing after fracturing is completed and then lower the drainage tubing for drainage, which cannot meet the needs of integrated fracturing and drainage and leads to a decrease in practicality.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a jet pump for fracturing and drainage integration, comprising a pump body, a ball seat fixedly connected to the inner wall of the pump body, a ball retainer slidably connected to the inner wall of the ball seat, a second connector fixedly connected to the right side of the inner wall of the pump body, a first connector fixedly connected to the left side of the inner wall of the pump body, a sliding sleeve slidably connected to the middle of the inner wall of the pump body, a sliding sleeve hole opened on the outer wall of the sliding sleeve, and a pin slidably connected to the bottom of the inner wall of the sliding sleeve.

[0007] As a further description of the above technical solution:

[0008] A sealing element is fixedly connected to the left side of the ball seat.

[0009] As a further description of the above technical solution:

[0010] The inner wall of the sliding sleeve hole is fixedly connected with a sealing element two.

[0011] As a further description of the above technical solution:

[0012] The pump body has a sealing element fixedly connected to both the left and right sides of its inner wall.

[0013] As a further description of the above technical solution:

[0014] The outer wall of the pin is slidably connected to the inner wall of the pump body.

[0015] As a further description of the above technical solution:

[0016] The right side of the sliding sleeve is fitted with the bottom of the inner wall of connector two, and the left side of the sliding sleeve is fitted with the top of the inner wall of connector one.

[0017] As a further description of the above technical solution:

[0018] The outer wall of the ball is slidably connected to the inner wall of the pump body.

[0019] This utility model has the following beneficial effects:

[0020] 1. In this utility model, by placing the sealing element three on the upper part of the pump body and limiting the sliding sleeve to the pump body by the pin, the ball seat can support the sliding sleeve, achieving the purpose of not bearing the upper and lower pressure difference but only the internal and external pressure difference during fracturing, thus improving safety and practicality.

[0021] 2. In this utility model, after the ball is pushed into the ball seat from the pump body, the pipe is pressurized to the preset pressure, and then the pin is cut to allow the sliding sleeve to descend to the bottom of the second connector, thereby aligning and connecting the second seal with the hole on the pump body. This achieves the purpose of both fracturing and drainage in the same tubing, improving practicality and expanding the scope of application. Attached Figure Description

[0022] Figure 1 This is a front perspective view of an integrated jet pump for fracturing and drainage proposed in this utility model;

[0023] Figure 2 This is a side view of an integrated jet pump for fracturing and drainage proposed in this utility model.

[0024] Legend:

[0025] 1. Connector 1; 2. Seal 1; 3. Sliding sleeve hole; 4. Seal 2; 5. Sliding sleeve; 6. Pump body; 7. Pin; 8. Seal 3; 9. Ball seat; 10. Connector 2; 11. Ball retainer. Detailed Implementation

[0026] 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.

[0027] Please see the appendix Figure 1 and attached Figure 2 An embodiment of this utility model provides: an integrated jet pump for fracturing and drainage, including a pump body 6, a ball seat 9 fixedly connected to the inner wall of the pump body 6, a retaining ball 11 slidably connected to the inner wall of the ball seat 9, the pump body 6 is used to transport fluid, a second connector 10 is fixedly connected to the right side of the inner wall of the pump body 6, a first connector 1 is fixedly connected to the left side of the inner wall of the pump body 6, the second connector 10 and the first connector 1 can switch between transport and drainage, a sliding sleeve 5 is slidably connected to the middle of the inner wall of the pump body 6, a sliding sleeve hole 3 is opened on the outer wall of the sliding sleeve 5, and a pin 7 is slidably connected to the bottom of the inner wall of the sliding sleeve 5, the pin 7 can fix the sliding sleeve 5 and the pump body 6;

[0028] Specifically, the pin 7 is made of wear-resistant and corrosion-resistant material, but it can also be broken when drainage is required. The movement of the sliding sleeve 5 is controlled by the pin 7, so that the fluid pump can drain fluid during fracturing. The ball 11 can control the fluid pump by engaging and disengaging with the ball seat 9, so that it does not bear the pressure difference between the upper and lower parts during fracturing.

[0029] Please see the appendix Figure 1 The outer wall of pin 7 is slidably connected to the inner wall of pump body 6. The right side of sliding sleeve 5 is in contact with the bottom of the inner wall of connector 10. The sliding of pin 7 on the inner wall of pump body 6 allows it to be fixed to sliding sleeve 5. The left side of sliding sleeve 5 is in contact with the top of the inner wall of connector 1. The outer wall of ball 11 is slidably connected to the inner wall of pump body 6. Ball 11 can enter ball seat 9 through pump body 6.

[0030] Specifically, when the ball 11 is subjected to external force, it enters the ball seat 9 accurately through the opening of the pump body 6, and the sliding sleeve 5 can switch between fitting with connector 1 and connector 2 10.

[0031] Please see the appendix Figure 2A sealing element 3 8 is fixedly connected to the left side of the ball seat 9. A sealing element 1 2 is fixedly connected to both the left and right sides of the inner wall of the pump body 6. A sealing element 2 4 is fixedly connected to the inner wall of the sliding sleeve hole 3. The sealing element 3 8 is used to enhance the sealing performance of the ball seat 9.

[0032] Specifically, seal 2 4 can improve and enhance the sealing performance when the sliding sleeve hole 3 is not used, and seal 3 8 can enhance the fit between the ball seat 9 and the ball 11.

[0033] Working principle: Before going down into the well, the sealing element 38 is placed on the upper part of the pump body 6. The sliding sleeve 5 is fixed to the pump body 6 with pins 7. The bottom of the sliding sleeve is equipped with a ball seat 9. No ball is thrown during fracturing. Therefore, the sliding sleeve 5 does not bear the pressure difference between the upper and lower parts, but only the pressure difference between the inside and outside parts during fracturing.

[0034] During drainage, the ball 11 is inserted into the pipe and enters the ball seat 9. The pipe is then pressurized to the design pressure, the pin 7 is cut off, the sliding sleeve 5 descends to the bottom of the connector 10, the seal 4 overlaps and connects with the hole on the pump body 6, the sliding sleeve opens, and the pump core is inserted to start drainage.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fracturing and drainage integrated jet pump comprising a pump body (6), characterized in that: A ball seat (9) is fixedly connected to the inner wall of the pump body (6), and a ball clamp (11) is slidably connected to the inner wall of the ball seat (9). A second connector (10) is fixedly connected to the right side of the inner wall of the pump body (6), and a first connector (1) is fixedly connected to the left side of the inner wall of the pump body (6). A sliding sleeve (5) is slidably connected to the middle of the inner wall of the pump body (6). A sliding sleeve hole (3) is opened on the outer wall of the sliding sleeve (5), and a pin (7) is slidably connected to the bottom of the inner wall of the sliding sleeve (5).

2. The fracturing and liquid drainage integrated jet pump according to claim 1, characterized in that: A sealing element three (8) is fixedly connected to the left side of the ball seat (9).

3. The fracturing and liquid drainage integrated jet pump according to claim 1, characterized in that: The inner wall of the sliding sleeve hole (3) is fixedly connected with a sealing element (4).

4. The integrated jet pump for fracturing and fluid drainage according to claim 1, characterized in that: The pump body (6) has a sealing element (2) fixedly connected to the left and right sides of its inner wall.

5. A jet pump for integrated fracturing and drainage according to claim 1, characterized in that: The outer wall of the pin (7) is slidably connected to the inner wall of the pump body (6).

6. The integrated jet pump for fracturing and fluid drainage according to claim 1, characterized in that: The right side of the sliding sleeve (5) is in contact with the bottom of the inner wall of the second connector (10), and the left side of the sliding sleeve (5) is in contact with the top of the inner wall of the first connector (1).

7. A jet pump for integrated fracturing and drainage according to claim 1, characterized in that: The outer wall of the ball (11) is slidably connected to the inner wall of the pump body (6).

Images