A multi-functional integrated production tool

Abstract

This utility model discloses a multifunctional integrated production tool, relating to the field of oilfield downhole tool technology. It solves the problems of cumbersome operation, high cost, poor connection, and ineffective sealing caused by separate packer and injection tools. This utility model includes an upper connector, a central tube, a well-washing assembly, a packer assembly, and an injection assembly. The upper end of the central tube is connected to the upper connector. The packer assembly includes a packer sleeve and a setting mechanism. The well-washing assembly and the setting mechanism are sequentially sleeved on the outside of the central tube from top to bottom. The packer sleeve is sleeved on the outside of the well-washing assembly. The lower end of the setting mechanism is connected to the injection assembly. A piston structure pushes the setting mechanism, which compresses the packer sleeve, causing it to expand laterally, thereby sealing the annular space of the casing. The injection assembly controls the injection volume. This utility model integrates packer and injection functions, reducing the number of downhole tools and operating steps, and improving operational efficiency.

Description

Technical Field

[0001] This utility model relates to the field of oilfield downhole tools technology, specifically a multi-functional integrated production tool. Background Technology

[0002] In oilfield production operations, downhole packing and filling are two critical steps. Traditionally, packing and filling tools are usually separate, which not only increases the complexity and cost of operations but also easily leads to problems such as poor connection and inadequate sealing during operation. Therefore, it is necessary to develop multifunctional integrated filling tools to improve operational efficiency and quality. Utility Model Content

[0003] To address the problems mentioned above, such as cumbersome operation, high cost, poor connection, and inadequate sealing effect caused by the separation of packing and dispensing tools, this invention proposes a multi-functional integrated dispensing tool. This invention integrates packing and dispensing functions, reducing the number of downhole tools and operating steps, and improving operational efficiency.

[0004] This utility model proposes a multifunctional integrated production tool, specifically including an upper connector, a central tube, a well-washing assembly, a packer assembly, and an injection assembly. The upper end of the central tube is connected to the upper connector. The packer assembly includes a packer sleeve and a setting mechanism. The well-washing assembly and the setting mechanism are sequentially fitted onto the outside of the central tube from top to bottom. The packer sleeve is fitted onto the outside of the well-washing assembly. The lower end of the setting mechanism is connected to the injection assembly. The setting mechanism includes a release head, a locking structure, a push cylinder, and a piston structure. The packer sleeve, release head, and push cylinder are sequentially fitted onto the outside of the central tube from top to bottom. A locking structure is provided between the release head and the central tube. The piston structure and... The lower end of the central tube is connected to and communicates with the interior of the central tube. The piston structure pushes the push cylinder and release head to move upward to squeeze the sealing rubber tube. The sealing rubber tube expands laterally to seal the annular space of the oil sleeve. The locking structure locks the position of the push cylinder. The dispensing assembly includes a connecting sleeve, a flow control valve, a nozzle, a main body, and a lower connector. The connecting sleeve, the main body, and the lower connector are connected sequentially from top to bottom. The upper end of the connecting sleeve is connected to the piston structure. The nozzle is located inside the main body. Both the nozzle and the main body are provided with a water outlet hole, and the two water outlet holes are connected. The flow control valve is movably located inside the connecting sleeve, and its lower end is inserted into the nozzle to control the opening size of the water outlet hole.

[0005] Furthermore, a positioning sleeve is provided inside the connecting sleeve, the upper end of the flow control valve is inserted into the interior of the positioning sleeve, and the lower end of the positioning sleeve is threadedly connected to the middle of the flow control valve.

[0006] Furthermore, the well-washing assembly includes a well-washing cylinder, a well-washing valve, and a flow tube. The flow tube is sleeved on the outside of the central pipe, and a gap is provided between the flow tube and the central pipe. The flow tube is provided with several flow holes one and several flow holes two, and the gap, flow holes one, and flow holes two are connected. The well-washing cylinder is sleeved on the outside of the upper connector, and a well-washing valve movable chamber is provided between the well-washing cylinder and the upper connector. The upper end of the well-washing valve is located in the well-washing valve movable chamber, and the lower end controls the opening and closing of flow holes one. The sealing rubber sleeve is sleeved on the outside of the flow tube and controls the opening and closing of flow holes two.

[0007] Furthermore, a gap is provided between the well-washing valve and the well-washing cylinder, and several sealing rings are provided on the outside of the well-washing valve.

[0008] Furthermore, the well-washing valve's movable chamber is connected to the interior of the central pipe.

[0009] Furthermore, the release head is provided with several through holes, through which the flow hole two communicates with the outside.

[0010] Furthermore, the sealing rubber tube includes a thrust ring, three rubber tubes and two spacer rings. The thrust ring is fixedly disposed on the outside of the flow tube, and the rubber tubes and spacer rings are alternately disposed on the outside of the flow tube.

[0011] Furthermore, the locking structure includes a locking ring, an unlocking pin, and a locking ring cap, with the locking ring cap mounted on the central tube via the unlocking pin; the locking ring is disposed in a groove on the locking ring cap.

[0012] Furthermore, the piston structure includes a primary piston, a connector, and a secondary piston, with the central tube, connector, and connector sleeve connected in sequence; the primary piston is located outside the central tube and connector, forming piston chamber one, which is connected to the interior of the central tube; the secondary piston is located outside the connector and connector sleeve, forming piston chamber two, which is connected to the interior of the connector.

[0013] Furthermore, the lower end of the secondary piston is connected to a seated pin and a connecting sleeve.

[0014] The beneficial effects of the multifunctional integrated production tool described in this utility model are as follows:

[0015] (1) The multifunctional integrated production tool described in this utility model connects the sealing component and the injection component together, reducing the number of downhole tools and operation steps, and improving the operation efficiency; the coordinated design of the sealing component and the injection component ensures the sealing effect and injection accuracy, shortens the tubing length, and improves the oilfield exploitation effect.

[0016] (2) The multifunctional integrated production tool described in this utility model, the high pressure liquid in the oil pipe enters the piston structure from the central pipe, and pushes the release head and the push cylinder through the piston structure. The release head squeezes the sealing rubber tube to make the sealing rubber tube expand laterally, thereby sealing the annular space of the oil jacket.

[0017] (3) The multifunctional integrated production tool described in this utility model locks the position of the push cylinder by forming a tooth mesh between the push cylinder and the locking ring, so that the sealing rubber cylinder will not rebound after the pressure in the oil pipe is released, thus achieving seated locking.

[0018] (4) The multifunctional integrated production tool described in this utility model uses a positioning sleeve to position the concentric electric measuring instrument. The concentric electric measuring instrument is connected to the flow control valve. The concentric electric measuring instrument drives the flow control valve to move up and down to adjust the size of the nozzle outlet, thereby adjusting the amount of water injected in this section.

[0019] (5) The multifunctional integrated production tool described in this utility model, through the set well washing component, after the well is set, the well washing valve moves upward under the action of high pressure liquid in the oil casing annular space, and forms a well washing channel through the gap between the flow hole one, the flow cylinder and the central pipe, the flow hole two and the through hole on the release head, to realize reverse circulation well washing. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0021] In the attached diagram:

[0022] Figure 1 This is a structural schematic diagram of a multifunctional integrated production tool according to the present invention;

[0023] Figure 2 This is a schematic diagram of the well-washing component and sealing rubber sleeve of a multifunctional integrated production tool according to this utility model;

[0024] Figure 3 This is a schematic diagram of the locking structure and piston structure of a multifunctional integrated production tool according to this utility model;

[0025] Figure 4 This is a schematic diagram of the dispensing component of a multifunctional integrated dispensing tool according to this utility model;

[0026] Figure 5 This is a schematic diagram of the main body of the multifunctional integrated production tool described in this utility model;

[0027] Figure 6 This is a schematic diagram of the flow control valve and nozzle of a multifunctional integrated production tool described in this utility model;

[0028] The components are as follows: 1-Upper connector, 2-Well washing cylinder, 3-Well washing valve, 4-Anti-detachment ring, 5-Flow tube, 51-Flow hole one, 52-Flow hole two, 6-Thrust ring, 7-Side rubber sleeve, 8-Spacer ring, 9-Middle rubber sleeve, 10-Release head, 11-Locking ring, 12-Unsealing pin, 13-Locking ring cap, 14-Central tube, 15-Push cylinder, 16-First-stage piston, 17-Connector, 18-Second-stage piston, 19-Setting pin, 20-Connecting sleeve, 21-Positioning sleeve, 22-Flow control valve, 23-Nozzle, 24-Main body, 25-Fixing pin, 26-Lower connector, 27-Ceramic movable water nozzle, 28-Ceramic fixed water nozzle, 29-Steel ring, 30-Teflon coating. Detailed Implementation

[0029] The technical solution of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of, and not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this 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.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] Specific implementation method one: See Figures 1-6 This embodiment is described in detail. The multi-functional integrated production tool described in this embodiment specifically includes an upper connector 1, a central tube 14, a well-washing assembly, a packer assembly, and an injection assembly. The upper end of the central tube 14 is threadedly connected to the upper connector 1. The packer assembly includes a packer sleeve and a setting mechanism. The well-washing assembly and the setting mechanism are sequentially fitted onto the outside of the central tube 14 from top to bottom. The packer sleeve is fitted onto the outside of the well-washing assembly. The lower end of the setting mechanism is connected to the injection assembly. The setting mechanism includes a release head 10, a locking structure, a push cylinder 15, and a piston structure. The packer sleeve, release head 10, and push cylinder 15 are sequentially fitted onto the outside of the central tube 14 from top to bottom. A locking structure is provided between the piston structure and the central tube 14; the piston structure is connected to the lower end of the central tube 14 and communicates with the interior of the central tube 14; the high-pressure liquid in the oil pipe enters the piston structure from the interior of the central tube 14, the piston structure moves upward to push the push cylinder 15 and the release head 10 to move upward to squeeze the sealing rubber tube, the sealing rubber tube expands laterally to seal the annular space of the oil sleeve; the locking structure locks the position of the push cylinder 15 so that after the liquid pressure in the oil pipe is released, the push cylinder 15 does not fall, avoiding the sealing rubber tube from rebounding, and achieving seated sealing; the upper connector 1 is provided with a thread on the inner side and the taper is 1:16, and the upper end of the upper connector 1 is threadedly connected to the oil pipe.

[0034] The locking structure includes a locking ring 11, an unlocking pin 12, and a locking ring cap 13. The locking ring cap 13 is mounted on the central tube 14 via the unlocking pin 12. The locking ring 11 is located in a groove on the locking ring cap 13. The locking ring 11 and the push cylinder 15 mesh to lock the push cylinder 15, preventing the push cylinder 15 from falling and continuously squeezing the sealing rubber tube.

[0035] The piston structure includes a primary piston 16, a connector 17, and a secondary piston 18. The lower end of the central tube 14 is externally threaded and the upper end of the connector 17 is internally threaded. The lower end of the connector 17 is externally threaded and the upper end of the connecting sleeve 20 is internally threaded. The primary piston 16 is located outside the central tube 14 and the connector 17. The primary piston 16, the central tube 14, and the connector 17 together form a piston chamber one, which is connected to the interior of the central tube 14 through a through hole. The secondary piston 18 is located outside the connector 17 and the connecting sleeve 20. The secondary piston 18, the connector 17, and the connecting sleeve 20 together form a piston chamber two, which is connected to the interior of the connector 17 through a through hole. High-pressure fluid from the oil pipe enters piston chamber two and piston chamber one through the through holes on connector 17 and central tube 14, respectively. The fluid pressure pushes the secondary piston 18 and primary piston 16 upwards. Primary piston 16 pushes the pusher cylinder 15 upwards, which in turn pushes the release head 10, compressing the sealing rubber sleeve. Sealing rings are provided on the inner sides of the heads of primary piston 16 and secondary piston 18; a sealing ring is also provided on the outer side of the upper end of connector 17.

[0036] The lower end of the secondary piston 18 is connected to the seated pin 19 and the connecting sleeve 20.

[0037] The dispensing assembly includes a connecting sleeve 20, a flow control valve 22, a nozzle 23, a main body 24, and a lower connector 26. The internal thread at the lower end of the connecting sleeve 20 engages with the external thread at the upper end of the main body 24, and the external thread at the lower end of the main body 24 engages with the internal thread at the upper end of the lower connector 26. The upper end of the connecting sleeve 20 is connected to a piston structure. The nozzle 23 is located inside the main body 24 and is connected by a fixing pin 25. Both the nozzle 23 and the main body 24 are provided with a water outlet hole, and the two water outlet holes are connected. The flow control valve 22 is movably located inside the connecting sleeve 20, and its lower end is inserted into the nozzle 23 to control the opening size of the water outlet hole. A ceramic movable nozzle 27 is coaxially sleeved on the outer side of the lower end of the flow control valve 22, and a ceramic fixed nozzle 28 is provided on the inner side of the upper end of the nozzle 23. The ceramic fixed nozzle 28 is provided with a through hole, which communicates with the water outlet on the main body 24 through the nozzle 23. The ceramic movable nozzle 27 and the ceramic fixed nozzle 28 cooperate to seal the water outlet. A retaining ring 29 is provided on the upper end of the nozzle 23 to prevent the ceramic fixed nozzle 28 from falling off. At the same time, a sealing ring is provided at both the upper and lower ends of the ceramic fixed nozzle 28 to seal it when it is damaged by extreme impact downhole, thereby ensuring the performance of the tool.

[0038] A sealing ring is provided on the outer side of the upper end of the connecting sleeve 20. The flow control valve 22 is a high-precision electric regulating valve, which can accurately adjust the flow rate according to the control signal. The valve core and valve seat inside the flow control valve 22 are made of ABS PC material and manufactured using 3D printing technology to ensure good sealing performance and adjustment accuracy. The main body 24 is one of the key structures of the dispensing component. The main body 24 is made of high-strength, corrosion-resistant 35CrMo alloy, and it is precision machined by wire cutting to form an annular water distribution space. Sealing rings are provided below the upper thread and above the lower thread of the main body 24, and a sealing ring is provided above the water outlet on the inner side of the main body 24. The water outlet and inner surface of the main body 24 are coated with Teflon coating 30 to improve wear resistance and corrosion resistance, and its inner wall is smooth to reduce fluid resistance. A sealing ring is provided on the outer side of the nozzle 23. The lower connector 26 is threaded on the outer side of its lower end, and the taper is 1:16.

[0039] The connecting sleeve 20 is equipped with a positioning sleeve 21. The upper end of the flow control valve 22 is inserted into the interior of the positioning sleeve 21, and the lower end of the positioning sleeve 21 is threadedly connected to the middle of the flow control valve 22. The concentric electric measuring and adjusting instrument is positioned by the positioning sleeve 21, which assists the concentric electric measuring and adjusting instrument in docking with the flow control valve 22. The concentric electric measuring and adjusting instrument drives the flow control valve 22, and the flow control valve 22 moves up and down in a spiral motion through the thread between the positioning sleeve 21 and the flow control valve 22, thereby adjusting the size of the water outlet of the nozzle 23 and adjusting the water injection volume of this section.

[0040] The well-washing assembly includes a well-washing cylinder 2, a well-washing valve 3, an anti-detachment ring 4, and a flow tube 5. The flow tube 5 is sleeved on the outside of the central tube 14, and the upper end of the flow tube 5 is threadedly connected to the central tube 14. A sealing ring is provided on the inner side of the upper end of the flow tube 5 for sealing with the central tube 14. A gap is provided between the flow tube 5 and the central tube 14. The flow tube 5 is provided with a plurality of flow holes 1 51 and a plurality of flow holes 2 52. The gap, flow holes 1 51, and flow holes 2 52 are connected to form a well-washing channel. The well-washing cylinder 2 is sleeved on the outside of the upper connector 1 and is threadedly connected. A sealing ring is provided on the outer side of the upper connector 1 to seal the position where it contacts the upper end of the well washing cylinder 2; a well washing valve movable chamber is provided between the well washing cylinder 2 and the upper connector 1; the upper end of the well washing valve 3 is located in the well washing valve movable chamber, and the lower end controls the opening and closing of the first flow hole 51; a sealing ring is provided on the position where the flow cylinder 5 contacts the well washing valve 3; a sealing rubber sleeve is sleeved on the outside of the flow cylinder 5 to control the opening and closing of the second flow hole 52; an anti-detachment ring 4 is sleeved on the outside of the flow cylinder 5 and located below the first flow hole 51; a sealing ring is provided between the anti-detachment ring 4 and the flow cylinder 5.

[0041] A sealing ring is provided on the outside of the well-washing valve 3, and a gap is provided between the well-washing valve 3 and the well-washing cylinder 2. High-pressure liquid enters the gap between the well-washing valve 3 and the well-washing cylinder 2 through the annular space of the oil casing, and pushes the sealing ring to move the well-washing valve 3 upward in the movable chamber of the well-washing valve, and the lower end of the well-washing valve 3 leaks out through the flow hole 51. The movable chamber of the well-washing valve is connected to the interior of the central tube 14, and the upward movement of the well-washing valve 3 facilitates the discharge of gas.

[0042] The release head 10 is provided with several through holes, and the flow hole 52 is connected to the outside through the through holes, so that water can smoothly enter the well washing channel.

[0043] The packer sleeve is the core component of the packer assembly, made of a specially formulated high-temperature and high-pressure resistant premium rubber material. This rubber material has excellent elasticity and anti-aging properties, maintaining good sealing performance in harsh downhole environments over long periods. The packer sleeve includes a thrust ring 6, three sleeves, and two spacer rings 8. The thrust ring 6 is fixedly mounted on the outside of the flow tube 5 and connected by threads. The sleeves and spacer rings 8 are alternately mounted on the outside of the flow tube 5. The sleeves include two side sleeves 7 and a middle sleeve 9. The middle sleeve 9 is positioned between the two side sleeves 7 and separated by the spacer rings 8, forming a serrated distribution that increases the contact area and friction with the wellbore, thereby improving the sealing effect. The packer sleeve also includes a convex rubber ring, which is fitted onto the outside of the flow tube 5 and positioned above the thrust ring 6. The convex rubber ring has a T-shaped cross-section, with one flat side of the convex rubber ring adhering to the flow tube 5. Simultaneously, the lower end of the anti-detachment ring 4 and the upper end of the thrust ring 6 press against the convex rubber ring. Figure 2 As shown. A sealing ring is provided on the inner side of the thrust ring 6.

[0044] The specific working process of the multifunctional integrated production tool described in this utility model is explained as follows:

[0045] Setting process: High-pressure liquid in the oil pipe enters piston chamber two and piston chamber one through the through hole on the central pipe 14, which acts on the heads of the second-stage piston 18 and the first-stage piston 16, causing the second-stage piston 18 and the first-stage piston 16 to move upward and shear the setting pin 19. The first-stage piston 16 pushes the push cylinder 15 and the release head 10. The release head 10 squeezes and compresses the side rubber sleeve 7 and the middle rubber sleeve 9. The rubber sleeve expands and seals the annular space of the oil sleeve. At the same time, the locking ring 11 engages and locks with the push cylinder 15. When the oil pipe pressure is released, the push cylinder 15 does not fall and the rubber sleeve does not rebound, thus achieving the setting and sealing.

[0046] Water injection volume adjustment: The water volume is adjusted by docking with a concentric electric measuring and adjusting instrument in the well. The concentric electric measuring and adjusting instrument passes through the central pipe 14, connector 17, and connecting sleeve 20, and is positioned within the positioning sleeve 21. The concentric electric measuring and adjusting instrument docks with the flow control valve 22 via a locking block. The ceramic movable nozzle 27 on the flow control valve 22 cooperates with the ceramic fixed nozzle 28 with a water outlet fixed on the nozzle 23. By driving the flow control valve 22 to move up and down by the concentric electric measuring and adjusting instrument, the opening size of the water outlet of the nozzle 23 is adjusted, thereby adjusting the water injection volume of this section.

[0047] Well washing process: High-pressure liquid enters the annular space of the oil casing through the gap between the well washing valve 3 and the well washing cylinder 2. It pushes the well washing valve 3 upward through the sealing ring on the well washing valve 3, and leaks out the first flow hole 51. At this time, the release head 10 squeezes the rubber tube upward, causing the second flow hole 52 to leak out, thereby opening the well washing channel of the flow cylinder 5 and realizing reverse circulation well washing.

[0048] Unsealing process: Lift the oil pipe. Under the action of friction between the side rubber sleeve 7 and the middle rubber sleeve 9 and the inner wall of the casing, the side rubber sleeve 7 and the middle rubber sleeve 9 push the release head 10 and the locking ring cap 13, so that the unsealing pin 12 is cut off. The side rubber sleeve 7 and the middle rubber sleeve 9 contract by their own elasticity to achieve unsealing.

[0049] In summary, the multifunctional integrated production tool of this invention connects the packer assembly and the injection assembly together, reducing the number of downhole tools and operating steps, and improving operational efficiency. The coordinated design of the packer and injection components ensures sealing effect and injection accuracy, shortens tubing length, and improves oilfield production efficiency. In this multifunctional integrated production tool, high-pressure liquid in the tubing enters the piston structure from the central tube 14. The piston structure pushes the release head 10 and the pusher cylinder 15. The release head 10 squeezes the packer rubber tube, causing it to expand laterally, thereby sealing the annular space between the tubing and casing. The multifunctional integrated production tool of this utility model locks the position of the push cylinder 15 by forming a toothed engagement between the push cylinder 15 and the locking ring 11, so that the sealing rubber sleeve will not rebound after the pressure in the tubing is released, thus achieving the setting and sealing. The multifunctional integrated production tool of this utility model positions the concentric electric measuring instrument through the positioning sleeve 21. The concentric electric measuring instrument is connected to the flow control valve 22. The concentric electric measuring instrument drives the flow control valve 22 to move up and down, thereby adjusting the opening size of the nozzle 23 water outlet and adjusting the water injection volume of this section. The multifunctional integrated production tool of this utility model, through the set well washing component, after the setting and sealing is completed, the well washing valve 3 moves upward under the action of high pressure liquid in the annular space of the tubing and casing. The well washing channel is formed through the flow hole 1 51, the gap between the flow cylinder 5 and the central tube 14, the flow hole 2 52 and the through hole on the release head 10, thus achieving reverse circulation well washing.

[0050] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit the utility model. They can also be reasonable combinations of the features described in the above embodiments. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-functional integrated production allocation tool, characterized by: The system includes an upper connector (1), a central tube (14), a well-washing assembly, a packer assembly, and a dispensing assembly. The upper end of the central tube (14) is connected to the upper connector (1). The packer assembly includes a packer sleeve and a setting mechanism. The well-washing assembly and the setting mechanism are sequentially fitted onto the outside of the central tube (14) from top to bottom. The packer sleeve is fitted onto the outside of the well-washing assembly. The lower end of the setting mechanism is connected to the dispensing assembly. The setting mechanism includes a release head (10), a locking structure, a pusher cylinder (15), and a piston structure. The packer sleeve is fitted onto the outside of the well-washing assembly. The cylinder, release head (10), and push cylinder (15) are sequentially sleeved on the outside of the central tube (14) from top to bottom. A locking structure is provided between the release head (10) and the central tube (14). The piston structure is connected to the lower end of the central tube (14) and communicates with the inside of the central tube (14). The piston structure pushes the push cylinder (15) and release head (10) to move upward to squeeze the sealing rubber cylinder. The sealing rubber cylinder expands laterally to seal the annular space of the oil sleeve. The locking structure locks the position of the push cylinder (15). The dispensing assembly includes a connecting sleeve (20), a flow control valve (22), a nozzle (23), a main body (24), and a lower connector (26). The connecting sleeve (20), the main body (24), and the lower connector (26) are connected from top to bottom. The upper end of the connecting sleeve (20) is connected to the piston structure. The nozzle (23) is located inside the main body (24). Both the nozzle (23) and the main body (24) are provided with a water outlet hole, and the two water outlet holes are connected. The flow control valve (22) is movably located inside the connecting sleeve (20), and its lower end is inserted into the nozzle (23) to control the opening size of the water outlet hole.

2. The multi-functional integrated proppant placement tool of claim 1, wherein: The connecting sleeve (20) is provided with a positioning sleeve (21) inside. The upper end of the flow control valve (22) is inserted into the interior of the positioning sleeve (21), and the lower end of the positioning sleeve (21) is threadedly connected to the middle part of the flow control valve (22).

3. The multi-functional integrated proppant placement tool of Claim 1, wherein: The well washing assembly includes a well washing cylinder (2), a well washing valve (3), and a flow tube (5). The flow tube (5) is sleeved on the outside of the central tube (14). A gap is provided between the flow tube (5) and the central tube (14). Several flow holes one (51) and several flow holes two (52) are provided on the flow tube (5). The gap, flow holes one (51), and flow holes two (52) are connected. The well washing cylinder (2) is sleeved on the outside of the upper connector (1). A well washing valve movable chamber is provided between the well washing cylinder (2) and the upper connector (1). The upper end of the well washing valve (3) is located in the well washing valve movable chamber, and the lower end controls the opening and closing of flow holes one (51). The sealing rubber sleeve is sleeved on the outside of the flow tube (5) and controls the opening and closing of flow holes two (52).

4. The multi-functional integrated proppant placement tool of claim 3, wherein: A gap is provided between the well-washing valve (3) and the well-washing cylinder (2), and several sealing rings are provided on the outside of the well-washing valve (3).

5. The multifunctional integrated production tool according to claim 3, characterized in that: The well-washing valve's active chamber is internally connected to the central pipe (14).

6. The multifunctional integrated production tool according to claim 3, characterized in that: The release head (10) is provided with several through holes, and the flow hole two (52) is connected to the outside through the through holes.

7. The multifunctional integrated production tool according to any one of claims 3-6, characterized in that: The sealing rubber tube includes a thrust ring (6), three rubber tubes and two spacer rings (8). The thrust ring (6) is fixedly installed on the outside of the flow tube (5), and the rubber tubes and spacer rings (8) are alternately installed on the outside of the flow tube (5).

8. The multifunctional integrated production tool according to any one of claims 1-6, characterized in that: The locking structure includes a locking ring (11), an unlocking pin (12), and a locking ring cap (13). The locking ring cap (13) is mounted on the central tube (14) via the unlocking pin (12). The locking ring (11) is mounted in a groove on the locking ring cap (13).

9. The multifunctional integrated production tool according to claim 8, characterized in that: The piston structure includes a primary piston (16), a connector (17), and a secondary piston (18). The central tube (14), connector (17), and connecting sleeve (20) are connected in sequence. The primary piston (16) is located outside the central tube (14) and connector (17) and forms a piston chamber one, which is connected to the interior of the central tube (14). The secondary piston (18) is located outside the connector (17) and connecting sleeve (20) and forms a piston chamber two, which is connected to the interior of the connector (17).

10. The multifunctional integrated production tool according to claim 9, characterized in that: The lower end of the secondary piston (18) is connected to the seated pin (19) and the connecting sleeve (20).

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