Anti-channeling well completion device between filling layers

Abstract

The utility model discloses a filling interlayer anti-channeling well completion device, which belongs to the technical field of petroleum drilling and comprises a sleeve, an expansion rubber sleeve is sleeved on the upper portion of the sleeve, a first cavity is formed between the expansion rubber sleeve and the sleeve, a material filling inlet is arranged on the inner wall of the sleeve, and a movable inner barrel capable of moving up and down is slidably mounted in the sleeve. The movable inner cylinder is used for blocking the material filling inlet when located at the upper working position, a reset spring is installed in the sleeve, a first ball seat is installed in the movable inner cylinder, a first material through hole penetrating up and down is formed in the middle of the first ball seat, and a shear pin is arranged between the first ball seat and the movable inner cylinder. And a support frame is arranged in the sleeve and below the movable inner cylinder. The expansion rubber sleeve is used for oil well completion, cement can be injected into the annular space below the expansion rubber sleeve, a firm cement sheath is formed between the sleeve and the well wall, channeling between different layers is effectively prevented, and stability of oil exploitation is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drilling, in particular to a filling layer anti-channeling completion device. Background Art

[0002] In oil production operations, it is common to encounter a situation where the interlayer between the oil layer and the water layer is thin. This thin interlayer is called a thin barrier. Traditional well completion methods are difficult to build a strong interlayer barrier at the thin barrier. Therefore, after the oil well has been in production for a period of time, different layers are prone to mutual communication.

[0003] In order to solve this problem, it is usually necessary to inject cement into the annular space between the casing and the well wall. After the cement solidifies, a solid cement ring will be formed between the casing and the well wall, thereby effectively preventing the phenomenon of mutual communication between different layers. The Chinese utility model patent with the authorization announcement number CN208168845U discloses a cement injection packer. The working principle of the cement injection packer is: first inject cement into the expansion rubber cylinder, and the expansion rubber cylinder will block the annular space between the center pipe and the well wall after expansion, so as to achieve the seat seal; then inject cement into the annular space above the seat seal, and after the cement solidifies, a solid cement ring can be formed in the annular space between the center pipe and the well wall, thereby solving the problem of mutual communication between different layers.

[0004] However, this cementing packer also has a defect: after the expansion rubber tube expands, cement can only enter the annular space above it. But in practical applications, in most cases, cement needs to be injected into the annular space below the expansion rubber tube, which limits the use of this packer to a certain extent. Summary of the invention

[0005] The utility model aims to provide a filling layer anti-channeling completion device, which is used for realizing the function of injecting cement into the annular space below the expansion rubber cylinder.

[0006] To achieve the above-mentioned purpose, the utility model discloses a filling layer inter-layer anti-channeling completion device, which includes a casing, an expansion rubber cylinder is sleeved on the upper part of the casing, the upper and lower ends of the expansion rubber cylinder are connected to the casing, a first chamber is formed between the expansion rubber cylinder and the casing, an inner wall of the casing is provided with a material filling inlet connected to the first chamber, a movable inner cylinder is slidably installed in the casing, the movable inner cylinder is used to block the material filling inlet when it is in the upper working position, and the movable inner cylinder is used to expose the material filling inlet above the movable inner cylinder after sliding downward, a return spring is installed in the casing, the return spring is located below the movable inner cylinder, the return spring is used to make the movable inner cylinder return to the upper working position, a first ball seat is installed in the movable inner cylinder, a first material through hole is provided in the middle of the first ball seat, a shear pin is provided between the first ball seat and the movable inner cylinder, and a support frame is provided at the part of the sleeve located below the movable inner cylinder, and the support frame is used for the first ball seat to fall onto it after the shear pin is broken. After adopting the above structure, when in use, a steel ball can be firstly put into the casing, and the steel ball will seal the first material through hole on the first ball seat, and cement is injected into the casing and pressurized, and the movable inner cylinder moves downward to expose the material filling inlet, and cement enters the first chamber through the material filling inlet, so that the expansion rubber cylinder expands and contacts the well wall to achieve seat sealing, and then the pressure is further increased to disconnect the shear pin, and the first ball seat is separated from the movable inner cylinder and falls onto the support frame, and the movable inner cylinder returns to the upper working position under the action of the reset spring to seal the material filling inlet again, and the cement flows from the lower end of the casing into the annular space below the expansion rubber cylinder, and forms a solid cement ring after solidification. Since the first chamber is also filled with cement, even if the expansion rubber cylinder is aged and damaged in the later stage, it will not affect the sealing effect.

[0007] Furthermore, the lower end of the casing is provided with a head, the head is provided with a material outlet, a second ball seat is fixedly connected inside the casing, the material outlet is located below the second ball seat, a second material through hole is provided in the middle of the second ball seat, the lower section of the second material through hole is a throat opening with a diameter gradually increasing from top to bottom, a ball is installed at the throat opening, and a supporting spring is provided below the ball. After adopting the above structure, when cement flows downward through the support frame, the ball is pushed downward, and the cement flows to the annular space between the casing and the well wall through the material outlet. After the cement injection is completed, the ball is blocked at the throat opening again under the action of the supporting spring, thereby preventing cement from flowing back.

[0008] Furthermore, a sealing groove is provided on the outer peripheral surface of the first ball seat, and a sealing ring is installed in the sealing groove. This structure improves the sealing effect between the first ball seat and the movable inner cylinder.

[0009] Furthermore, the movable inner cylinder includes an outer cylinder and an inner cylinder, the lower part of the inner wall of the outer cylinder is provided with an annular mounting groove, the inner cylinder is inserted into the annular mounting groove, the outer cylinder and the inner cylinder are fixed by a fastening screw, a pin through hole is provided on the cylinder wall of the inner cylinder, the tail of the shear pin is located in the pin through hole, a pin blind hole is provided on the outer circumferential surface of the first ball seat, and the head of the shear pin is located in the pin blind hole. After adopting the above structure, the shear pin, the inner cylinder, and the first ball seat can be combined together first during assembly, and then the outer cylinder and the inner cylinder are fixed together by the fastening screw, thereby facilitating the installation of the shear pin.

[0010] Furthermore, an annular groove is provided on the outer circumference of the outer cylinder, and when the movable inner cylinder is located at the upper working position, the material filling inlet is directly opposite to the annular groove, and there is a sealing groove at the position above and below the annular groove on the outer circumference of the outer cylinder, and a sealing ring is installed in the sealing groove. When the movable inner cylinder is located at the upper working position, the two sealing rings are respectively located at the upper and lower sides of the material filling inlet, thereby improving the sealing effect between the movable inner cylinder and the sleeve.

[0011] Furthermore, a through hole is provided at the annular groove of the outer cylinder, and a threaded hole is provided on the outer circumferential surface of the inner cylinder, and a fastening screw passes through the through hole on the outer cylinder and is screwed into the threaded hole on the inner cylinder. With the above structure, the fastening screw is installed at the annular groove, and the fixation between the outer cylinder and the inner cylinder is more convenient, and the sealing between the movable inner cylinder and the sleeve is not affected.

[0012] Furthermore, a sealing groove is provided on the outer circumferential surface of the inner cylinder, and a sealing ring is installed in the sealing groove. This structure improves the sealing effect between the inner cylinder and the outer cylinder.

[0013] Furthermore, a tapered opening with a gradually increasing diameter from bottom to top is provided at the upper inner opening edge of the outer cylinder, and a ball socket is provided at the upper inner opening edge of the first ball seat. The setting of the tapered opening is conducive to guiding the steel ball to fall onto the first ball seat, and the setting of the ball socket increases the contact area between the steel ball and the first ball seat, thereby improving the blocking effect of the steel ball on the first material through hole.

[0014] Furthermore, the sleeve includes a first connecting tube, a second connecting tube, a third connecting tube, a fourth connecting tube, a fifth connecting tube, an inner tube, and an outer tube. The lower end of the first connecting tube is connected to the upper end of the second connecting tube, the lower end of the second connecting tube is connected to the upper end of the third connecting tube, the upper ends of the inner tube and the outer tube are connected to the lower end of the third connecting tube, the lower ends of the inner tube and the outer tube are connected to the upper end of the fourth connecting tube, the lower end of the fourth connecting tube is connected to the upper end of the fifth connecting tube, the end cap is connected to the lower end of the fifth connecting tube, a second chamber is formed between the inner tube and the outer tube, a connecting hole connecting the first chamber and the second chamber is provided on the third connecting tube, and a material filling inlet is provided on the inner tube. After adopting the above structure, the sleeve adopts a modular structure, which is conducive to standardized design and convenient for adjusting the size of each part according to usage.

[0015] Furthermore, a limiting ring is provided on the inner wall of the third connecting tube, and the support frame is connected to the inner wall of the fourth connecting tube. The limiting ring is used to limit the movable inner cylinder and to define the upper working position of the movable inner cylinder.

[0016] In summary, the beneficial effects of the utility model are as follows: the utility model is used for oil well completion, and cement can be injected into the annular space below the expansion rubber cylinder to form a solid cement ring between the casing and the well wall, effectively preventing the flow of different layers and ensuring the stability of oil production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model when it is in the first working state;

[0018] Figure 2 yes Figure 1 A magnified view of part A in FIG.

[0019] Figure 3 yes Figure 2 Middle is the enlarged view after sectioning along line BB;

[0020] Figure 4 yes Figure 1 A schematic diagram of the structure of the fourth connecting pipe;

[0021] Figure 5 It is a structural schematic diagram of the utility model when it is in the second working state;

[0022] Figure 6 It is a structural schematic diagram of the utility model when it is in the third working state.

[0023] In the figure: 1, sleeve, 101, first connecting tube, 102, second connecting tube, 103, third connecting tube, 104, fourth connecting tube, 105, fifth connecting tube, 106, inner tube, 107, outer tube, 2, expansion rubber cylinder, 3, first chamber, 4, material filling inlet, 5, movable inner cylinder, 501, outer cylinder, 502, inner cylinder, 6, return spring, 7, first ball seat, 8, first material through hole, 9, Cut the pin, 10. Support frame, 11. Head, 12. Material outlet, 13. Second ball seat, 14. Second material through hole, 15. Throat, 16. Ball, 17. Support spring, 18. Sealing groove, 19. Sealing ring, 20. Annular mounting groove, 21. Fastening screw, 22. Pin through hole, 23. Pin blind hole, 24. Annular groove, 25. Ball socket, 26. Second chamber, 27. Connecting hole, 28. Limit ring edge. DETAILED DESCRIPTION

[0024] The utility model aims to solve the problem that the existing cement packer cannot inject cement into the annular space below the expansion rubber tube, and provides a filling layer anti-channeling completion device, which is equivalent to the cement packer and is used for injecting cement into the annular space below the expansion rubber tube during well completion.

[0025] The specific implementation of the utility model is further described in detail below in conjunction with the drawings and embodiments.

[0026] Reference Figure 1 In some embodiments of the utility model, the filling layer anti-channeling completion device includes a casing 1, an expansion rubber tube 2 is sleeved on the upper part of the casing 1, and the upper and lower ends of the expansion rubber tube 2 are connected to the casing 1, and a first chamber 3 is formed between the expansion rubber tube 2 and the casing 1. The first chamber 3 is used to inject cement, and the expansion rubber tube 2 contacts the well wall after expansion to achieve sealing, and then the cement flows through the lower end of the casing 1 to the annular space below the sealing position, and forms a cement ring to prevent channeling after solidification.

[0027] Reference Figure 1In some embodiments of the present invention, the casing 1 includes a first connecting tube 101, a second connecting tube 102, a third connecting tube 103, a fourth connecting tube 104, a fifth connecting tube 105, an inner tube 106, and an outer tube 107. The lower end of the first connecting tube 101 is connected to the upper end of the second connecting tube 102, the lower end of the second connecting tube 102 is connected to the upper end of the third connecting tube 103, and the upper ends of the inner tube 106 and the outer tube 107 are both connected to the lower end of the third connecting tube 103. The lower ends of the inner tube 106 and the outer tube 107 are connected to the upper end of the fourth connecting tube 104, the lower end of the fourth connecting tube 104 is connected to the upper end of the fifth connecting tube 105, the end cap 11 is connected to the lower end of the fifth connecting tube 105, a second chamber 26 is formed between the inner tube 106 and the outer tube 107, a connecting hole 27 connecting the first chamber 3 and the second chamber 26 is provided on the third connecting tube 103, and a material filling inlet 4 connected to the first chamber 3 is provided on the inner tube 106. The sleeve 1 in this embodiment is a structure composed of multiple components, and the components can be connected together by welding, threaded connection, etc.; of course, in other embodiments, the sleeve 1 can also adopt other structures, for example, the entire sleeve 1 is an integral structure formed by casting.

[0028] Reference Figure 1 In order to allow the material to flow out from the lower end of the sleeve 1 and prevent the material from flowing back, in some embodiments of the utility model, a head 11 is provided at the lower end of the sleeve 1, and a material outlet 12 is provided on the head 11. A second ball seat 13 is fixedly connected to the sleeve 1, and the material outlet 12 is located below the second ball seat 13. A second material through hole 14 is provided in the middle of the second ball seat 13 and passes through from top to bottom. The lower section of the second material through hole 14 is a throat 15 with a diameter gradually increasing from top to bottom. A round ball 16 is installed at the throat 15, and a supporting spring 17 is provided below the round ball 16.

[0029] Reference Figure 1 , Figure 2In order to make the material flow to the first chamber 3 first, the expansion rubber cylinder 2 expands and seals the material and then makes the material flow from the lower end of the casing 1 to the annular space between the casing and the well wall. In some embodiments of the utility model, a movable inner cylinder 5 that can move up and down is slidably installed in the casing 1, and a limiting ring edge 28 is provided on the inner wall of the third connecting pipe 103. When the movable inner cylinder 5 moves upward, the limiting ring edge 28 limits the movable inner cylinder 5 to keep it in the upper working position. When the movable inner cylinder 5 is located at the upper working position, it is used to block the material filling inlet 4. After the movable inner cylinder 5 slides downward, it is used to expose the material filling inlet 4 above the movable inner cylinder 5. A return spring 6 is installed in the sleeve 1, and the return spring 6 is located below the movable inner cylinder 5. The upper end of the return spring 6 contacts with the movable inner cylinder 5. The return spring 6 is used to return the movable inner cylinder 5 to the upper working position. A first ball seat 7 is installed in the movable inner cylinder 5. A sealing groove 18 is provided on the outer peripheral surface of the first ball seat 7, and a sealing ring 19 is installed in the sealing groove 18. A first material through hole 8 that passes through the first ball seat 7 from top to bottom is provided in the middle part of the first ball seat 7. A shear pin 9 is provided between the first ball seat 7 and the movable inner cylinder. A support frame 10 is provided at the position below the movable inner cylinder 5 in the sleeve, and the lower end of the return spring 6 contacts with the support frame 10. The support frame 10 is used for allowing the first ball seat 7 to fall onto it after the shear pin 9 is disconnected. When in use, a steel ball is first dropped into the casing 1, and the steel ball falls onto the first ball seat 7 to seal the first material through hole 8. Then cement is injected into the casing 1 and pressure is applied. The movable inner cylinder 5 and the first ball seat 7 move downward together, and the material filling inlet 4 is exposed. Cement can enter the first chamber 3 through the material filling inlet 4, so that the expansion rubber cylinder 2 expands and contacts the well wall to achieve seat sealing. Finally, the pressure is increased to disconnect the shear pin 9, and the first ball seat 7 is separated from the movable inner cylinder 5 and falls onto the support frame 10. The movable inner cylinder 5 returns to the upper working position under the action of the reset spring 6 to seal the material filling inlet 4 again. The cement flows downward through the support frame 10, and the ball 16 is pushed downward, so that the cement can flow to the annular space between the casing 1 and the well wall through the material outlet 12.

[0030] Reference Figure 3 , Figure 4 In the illustrated embodiment, the support frame 10 is connected to the inner wall of the fourth connecting pipe 104. The support frame 10 in this embodiment includes a plurality of radially distributed ribs. Of course, in other embodiments, the support frame 10 may also adopt other structural forms such as a porous plate.

[0031] Reference Figure 2In order to facilitate the installation of the pin blind hole 23, in some embodiments of the utility model, the movable inner cylinder 5 includes an outer cylinder 501 and an inner cylinder 502. An annular groove 24 is provided on the outer circumference of the outer cylinder 501. When the movable inner cylinder 5 is located at the upper working position, the material filling inlet 4 faces the annular groove 24. There is a sealing groove 18 at the upper and lower parts of the outer circumference of the outer cylinder 501. A sealing ring 19 is installed in the sealing groove 18. An annular installation groove 20 is provided at the lower part of the inner wall of the outer cylinder 501, and the inner cylinder 502 is inserted into the annular installation groove 20. A through hole is provided at the annular groove 24 of the outer cylinder 501, and a threaded hole is provided on the outer circumference of the inner cylinder 502. The fastening screw 21 passes through the through hole on the outer cylinder 501 and is screwed into the threaded hole on the inner cylinder 502. The outer cylinder 501 and the inner cylinder 502 are fixed by the fastening screw 21. A sealing groove 18 is provided on the outer circumference of the inner cylinder 502, and a sealing ring 19 is installed in the sealing groove 18. A pin through hole 22 is provided on the cylinder wall of the inner cylinder 502, and the tail of the shear pin 9 is located in the pin through hole 22. A pin blind hole 23 is provided on the outer circumference of the first ball seat 7, and the head of the shear pin 9 is located in the pin blind hole 23.

[0032] Reference Figure 2 In order to make the steel ball fall smoothly onto the first ball seat 7, in some embodiments of the utility model, a tapered mouth with a diameter gradually increasing from bottom to top is provided at the upper inner edge of the outer cylinder 501. In order to improve the sealing effect of the steel ball on the first material through hole 8, a ball socket 25 is provided at the upper inner edge of the first ball seat 7.

[0033] Figure 1 , Figure 5 , Figure 6 The three working states of the utility model are shown in FIG. The usage of the utility model is as follows: First, Figure 1 In the state shown, a steel ball is firstly put into the casing 1, and the steel ball falls onto the first ball seat 7 to block the first material through hole 8, and then cement is injected into the casing 1 and pressurized, and the movable inner cylinder 5 and the first ball seat 7 move downward together, and the material filling inlet 4 is exposed, and the material enters. Figure 2 In this state, cement can enter the first chamber 3 through the material filling inlet 4, causing the expansion rubber cylinder 2 to expand continuously, and the expansion rubber cylinder 2 contacts the well wall to achieve the seat seal. Next, the pressure is increased to disconnect the shear pin 9, and the first ball seat 7 is separated from the movable inner cylinder 5 and falls onto the support frame 10. The movable inner cylinder 5 returns to the upper working position under the action of the return spring 6 to block the material filling inlet 4 again. The cement flows downward through the support frame 10, and the ball 16 is pushed downward to enter Figure 3In the state shown, cement can flow to the annular space between the casing 1 and the well wall through the material outlet 12. After the cement injection is completed, the ball 16 is blocked at the throat 15 again under the action of the spring 17 to prevent cement from flowing back. After the cement solidifies, not only a solid cement ring is formed under the expansion rubber cylinder 2, but also the cement in the expansion rubber cylinder 2 will solidify. Even if the expansion rubber cylinder 2 is aged and damaged, it will not affect the sealing effect.

[0034] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A filling layer anti-channeling completion device, comprising a casing (1), an expansion rubber cylinder (2) is sleeved on the upper part of the casing (1), the upper and lower ends of the expansion rubber cylinder (2) are connected to the casing (1), and a first chamber (3) is formed between the expansion rubber cylinder (2) and the casing (1), characterized in that: The inner wall of the sleeve (1) is provided with a material filling inlet (4) communicating with the first chamber (3). A movable inner cylinder (5) is slidably mounted in the sleeve (1) and is movable up and down. When the movable inner cylinder (5) is located in an upper working position, it is used to block the material filling inlet (4). After the movable inner cylinder (5) slides downward, it is used to expose the material filling inlet (4) above the movable inner cylinder (5). A return spring (6) is mounted in the sleeve (1). The return spring (6) is located below the movable inner cylinder (5). The return spring (6) is used to return the movable inner cylinder (5) to the upper working position. A first ball seat (7) is mounted in the movable inner cylinder (5). A first material through hole (8) penetrating up and down is provided in the middle of the first ball seat (7). A shear pin (9) is provided between the first ball seat (7) and the movable inner cylinder. A support frame (10) is provided in the sleeve at a position below the movable inner cylinder (5). The support frame (10) is used to allow the first ball seat (7) to fall onto it after the shear pin (9) is disconnected.

2. The anti-channeling completion device between filling layers according to claim 1, characterized in that: The lower end of the sleeve (1) is provided with a sealing head (11), the sealing head (11) is provided with a material outlet (12), a second ball seat (13) is fixedly connected inside the sleeve (1), the material outlet (12) is located below the second ball seat (13), a second material through hole (14) is provided in the middle of the second ball seat (13) and is passed through from top to bottom, the lower section of the second material through hole (14) is a throat (15) whose diameter gradually increases from top to bottom, a round ball (16) is installed at the throat (15), and a supporting spring (17) is provided below the round ball (16).

3. The anti-channeling completion device between filling layers according to claim 1 is characterized in that: A sealing groove (18) is provided on the outer peripheral surface of the first ball seat (7), and a sealing ring (19) is installed in the sealing groove (18).

4. The anti-channeling completion device between filling layers according to claim 1, characterized in that: The movable inner cylinder (5) comprises an outer cylinder (501) and an inner cylinder (502); an annular mounting groove (20) is provided at the lower portion of the inner wall of the outer cylinder (501); the inner cylinder (502) is inserted into the annular mounting groove (20); the outer cylinder (501) and the inner cylinder (502) are fixed by means of a fastening screw (21); a pin through hole (22) is provided on the cylinder wall of the inner cylinder (502); the tail of the shear pin (9) is located in the pin through hole (22); a pin blind hole (23) is provided on the outer peripheral surface of the first ball seat (7); the head of the shear pin (9) is located in the pin blind hole (23).

5. The anti-channeling completion device between filling layers according to claim 4 is characterized in that: An annular groove (24) is provided on the outer circumferential surface of the outer cylinder (501); when the movable inner cylinder (5) is located at the upper working position, the material filling inlet (4) faces the annular groove (24); and a sealing groove (18) is provided on the outer circumferential surface of the outer cylinder (501) at the position above and below the annular groove (24), respectively. A sealing ring (19) is installed in the sealing groove (18).

6. The anti-channeling completion device between filling layers according to claim 5, characterized in that: A through hole is provided at the annular groove (24) of the outer cylinder (501), and a threaded hole is provided on the outer peripheral surface of the inner cylinder (502). The fastening screw (21) passes through the through hole on the outer cylinder (501) and is screwed into the threaded hole on the inner cylinder (502).

7. The anti-channeling completion device between filling layers according to claim 4, characterized in that: A sealing groove (18) is provided on the outer peripheral surface of the inner cylinder (502), and a sealing ring (19) is installed in the sealing groove (18).

8. The filling layer anti-channeling completion device according to claim 4, characterized in that: The upper inner edge of the outer cylinder (501) is provided with a tapered opening whose diameter gradually increases from bottom to top, and the upper inner edge of the first ball seat (7) is provided with a ball socket (25).

9. The anti-channeling completion device between filling layers according to any one of claims 2 to 8, characterized in that: The casing (1) comprises a first connecting tube (101), a second connecting tube (102), a third connecting tube (103), a fourth connecting tube (104), a fifth connecting tube (105), an inner tube (106), and an outer tube (107); the lower end of the first connecting tube (101) is connected to the upper end of the second connecting tube (102); the lower end of the second connecting tube (102) is connected to the upper end of the third connecting tube (103); the upper ends of the inner tube (106) and the outer tube (107) are both connected to the lower end of the third connecting tube (103); The lower ends of the inner tube (106) and the outer tube (107) are connected to the upper end of the fourth connecting tube (104), the lower end of the fourth connecting tube (104) is connected to the upper end of the fifth connecting tube (105), the end cap (11) is connected to the lower end of the fifth connecting tube (105), a second chamber (26) is formed between the inner tube (106) and the outer tube (107), a connecting hole (27) connecting the first chamber (3) and the second chamber (26) is provided on the third connecting tube (103), and a material filling inlet (4) is provided on the inner tube (106).

10. The filling layer anti-channeling completion device according to claim 9, characterized in that: A limiting ring edge (28) is provided on the inner wall of the third connecting tube (103), and the supporting frame (10) is connected to the inner wall of the fourth connecting tube (104).

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