Microbubble curing bridge slurry device and use method thereof

Abstract

The invention belongs to the technical field of oil and gas development, and particularly relates to a microbubble curing bridge slurry device and a using method thereof.The microbubble curing bridge slurry device comprises a combined tank body, a large bin is arranged on one side of the interior of the combined tank body, a small bin is arranged on one side of the large bin, an equipment bin is arranged on one side of the small bin, and a first stirrer is arranged in the large bin; a second stirrer is arranged in the small bin, the upper end of the small bin is sleeved with a slurry mixer, and the input end of the slurry mixer is externally connected with slurry; nitrogen and foaming liquid are mixed through the microbubble generator to generate microbubbles, the microbubbles can permeate into fine cracks and pores, and microbubble slurry with good fluidity is formed after the microbubbles are mixed with the slurry. The slurry can more effectively cover and plug a plurality of leakage points on a shallow sleeve, especially fine cracks which are difficult to touch by a traditional method, so that the plugging efficiency is remarkably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas development, and specifically refers to a microbubble solidification bridge slurry device and a use method thereof. Background Art

[0002] In the later stages of oil and gas well development, shallow casing is a key structure connecting the surface and underground oil and gas layers. Its stability and integrity are crucial for sustained and efficient oil and gas production. Shallow casing, as the name suggests, refers to the casing section located near the surface and at a shallow depth, which is directly subject to multiple influences such as ground activities, underground fluid pressure changes and chemical corrosion. In recent years, with the increase in the service life of oil and gas wells, shallow casing faces serious corrosion, perforation and damage problems, which not only reduce the production efficiency of oil and gas wells, but also pose a potential threat to environmental safety.

[0003] What is particularly tricky is that the leak points of the damaged casing are widely and irregularly distributed, and the flow areas of the leak points vary, making traditional bridge plugging slurries incapable of dealing with crack leakage. Traditional bridge plugging methods often fail to effectively cover all leak points, especially in fine cracks with small flow areas, where the plugging effect is greatly reduced, resulting in a significant increase in the difficulty of plugging operations and a sharp increase in costs. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a microbubble solidification bridge slurry device and a method of using the same.

[0005] The technical scheme adopted by the present invention is as follows: The present invention provides a microbubble solidification bridge slurry device, including a combined tank body, a large bin is provided on one side of the internal part of the combined tank body, a small bin is provided on one side of the large bin, an equipment bin is provided on one side of the small bin, a stirrer 1 is provided inside the large bin, a stirrer 2 is provided inside the small bin, a mud mixer is sleeved on the upper end of the small bin, the input end of the mud mixer is externally connected to mud, the output end of the mud mixer is connected to the input end of a mud cyclone, a sedimentation tank 1 is provided at the internal bottom end of the large bin, a sedimentation tank 2 is provided at the internal bottom end of the small bin, a water pump is provided at the internal bottom end of the equipment bin, the input end of the water pump is connected to the side wall of a mud extraction pipe 1, one end of the mud extraction pipe 1 is provided in a sedimentation tank 1, the other end of the mud extraction pipe 1 is provided with a liquid inlet, and the liquid inlet An external foaming liquid is provided, and one end of the mud extraction pipe 2 is connected to the side wall of the mud extraction pipe 1, and the other end of the mud extraction pipe 2 is arranged in the sedimentation tank 2. The mud extraction pipe 2 is provided with a butterfly valve 2, one side of the mud extraction pipe 1 is provided with a butterfly valve 1, and the other side of the mud extraction pipe 1 is provided with a butterfly valve 3. A nitrogen generator is provided on the inner side wall of the equipment warehouse, and a microbubble generator is provided at the upper end of the equipment warehouse. The output end of the nitrogen generator is connected to the input end of the microbubble generator, the output end of the water pump is connected to one end of the output pipe 2, and the other end of the output pipe 2 is connected to the input end of the microbubble generator, the output end of the microbubble generator is connected to one end of the large warehouse pipeline, and the other end of the large warehouse pipeline is arranged in the large warehouse. A butterfly valve 6 is provided on the large warehouse pipeline, and the lower end of the side wall of the butterfly valve 6 is connected to the pipeline, and the pipeline is provided with a butterfly valve 5.

[0006] Furthermore, a small bin is provided at the output end of the pipeline.

[0007] Furthermore, a control box is provided on the other side of the interior of the equipment compartment.

[0008] Furthermore, the stirrer 1 includes a motor, the motor is provided with a top end of a large bin, the output end of the motor is connected to a stirring rod, and the stirrer 2 has the same structure as the stirrer 1.

[0009] Furthermore, the lower end of the outer wall of the large warehouse is connected to the output pipe one, the output pipe one is provided with a skid-mounted pump, the skid-mounted pump is provided with a butterfly valve four, and the skid-mounted pump is arranged on one side of the butterfly valve four.

[0010] Furthermore, the butterfly valve one is arranged on the left side of the butterfly valve two.

[0011] Furthermore, a ladder is provided on one side of the combined tank body, and a sedimentation tank three is provided at the bottom end of one side inside the large warehouse.

[0012] The present invention also discloses a method for using a microbubble curing bridge slurry device, which mainly comprises the following steps:

[0013] Step 1: The input end of the mud mixer is connected to the mud, and the mud enters the small bin after being stirred by the mud cyclone;

[0014] Step 2: Open butterfly valve 3, close butterfly valve 1 and butterfly valve 2, start the water pump, the foaming liquid connected to the liquid inlet enters the input end of the microbubble generator through output pipe 2, and then enters the large warehouse pipeline after merging with the nitrogen generated by the nitrogen generator, open butterfly valve 5, close butterfly valve 6, the nitrogen foaming liquid enters the small warehouse through the pipeline, and the nitrogen foaming liquid and the mud are stirred and mixed by agitator 2;

[0015] Step 3: Close butterfly valve 5, butterfly valve 3 and butterfly valve 1, open butterfly valve 2, and use a water pump to pump the microbubble mud in the small bin into the large bin through mud pumping pipe 2, mud pumping pipe 1, output pipe 2, microbubble generator and large bin pipeline. Finally, open butterfly valve 4 and the skid-mounted pump to transport the mud to the plugging point of the shallow casing. The output end of output pipe 1 rotates to drive the control box to rotate, thereby stirring the microbubble mud in the large bin.

[0016] The beneficial effects achieved by the present invention using the above structure are as follows:

[0017] (1) Microbubbles are generated by mixing nitrogen with foaming liquid through a microbubble generator. These microbubbles can penetrate into tiny cracks and pores and form microbubble mud with good fluidity after mixing with mud. This mud can more effectively cover and plug multiple leaks on shallow casing, especially those tiny cracks that are difficult to reach with traditional methods, thereby significantly improving the plugging efficiency.

[0018] (2) The microbubbles in the microbubble mud can form a dense network structure during the solidification process. This structure not only enhances the plugging strength of the mud, but also effectively prevents the fluid from leaking through the cracks again. At the same time, the stirring action of the agitator 2 ensures that the nitrogen foaming liquid and the mud are fully mixed, making the microbubbles more evenly distributed in the mud, further improving the plugging effect.

[0019] (3) The ratio and fluidity of the microbubble mud can be adjusted according to the size of the flow area of ​​different leakage points to better adapt to various complex leakage situations. This flexibility makes the device more adaptable and practical when dealing with various leakage problems of shallow casing.

[0020] (4) Operators can easily control the generation, mixing and delivery process of microbubble mud, reducing the complexity and difficulty of plugging operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 This is a schematic structural diagram of a microbubble solidification bridge slurry device according to the present invention.

[0023] Among them, 1. large warehouse, 2. small warehouse, 3. mud extraction pipe 1, 4. butterfly valve 1, 5. butterfly valve 2, 6. butterfly valve 3, 7. mud extraction pipe 2, 8. water pump, 9. agitator 1, 10. agitator 2, 11. equipment warehouse, 12. ladder, 13. mud mixer, 14. microbubble generator, 15. mud cyclone, 16. nitrogen generator, 17. large warehouse pipeline, 18. mud pump, 19. combined tank body, 20. butterfly valve 4, 21. skid-mounted pump, 22. sedimentation tank 1, 23. sedimentation tank 2, 24. motor, 24. output pipe, 25. stirring rod, 25. control box, 26. pipeline, 27. butterfly valve 5, 28. butterfly valve 6, 29. output pipe, 30. liquid inlet, 31. sedimentation tank 3. DETAILED DESCRIPTION

[0024] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0025] like Figure 1As shown, the present invention proposes a microbubble solidification bridge slurry device, including a combined tank body 19, a ladder 12 is provided on one side of the combined tank body 19, a large warehouse 1 is provided on one side of the internal part of the combined tank body 19, an output pipe 24 is connected through the lower end of the outer wall of the large warehouse 1, a skid-mounted pump 21 is provided on the output pipe 24, a butterfly valve 20 is provided on the skid-mounted pump 21, the skid-mounted pump 21 is arranged on one side of the butterfly valve 20, a small warehouse 2 is provided on one side of the large warehouse 1, an equipment warehouse 11 is provided on one side of the small warehouse 2, a control box 25 is provided on the other side of the internal part of the equipment warehouse 11, a stirrer 9 is provided inside the large warehouse 1, and a stirrer 9 is provided inside the large warehouse 1. 9 includes a motor 31, the motor 31 is provided at the top of the large warehouse 1, the output end of the motor 31 is connected to the stirring rod 32, the stirrer 2 10 and the stirrer 1 9 have the same structure, the stirrer 2 10 is provided inside the small warehouse 2, the upper end of the small warehouse 2 is sleeved with a mud mixer 13, the input end of the mud mixer 13 is externally connected to mud, the output end of the mud mixer 13 is connected to the input end of the mud cyclone 15, the internal bottom end of the large warehouse 1 is provided with a sedimentation tank 1 22, the internal bottom end of the small warehouse 2 is provided with a sedimentation tank 2 23, the internal bottom end of the equipment warehouse 11 is provided with a water pump 8, and the input end of the water pump 8 is connected to the mud pumping pipe On the side wall of the equipment bin 11, one end of the mud pumping pipe 13 is arranged in the sedimentation tank 122, and the other end of the mud pumping pipe 13 is provided with a liquid inlet 30, and the liquid inlet 30 is externally connected to the foaming liquid. The side wall of the mud pumping pipe 13 is connected to one end of the mud pumping pipe 27, and the other end of the mud pumping pipe 27 is arranged in the sedimentation tank 23. A butterfly valve 25 is provided on the mud pumping pipe 27, and a butterfly valve 4 is provided on one side of the mud pumping pipe 13, and the butterfly valve 4 is arranged on the left side of the butterfly valve 25. A butterfly valve 36 is provided on the other side of the mud pumping pipe 13. A nitrogen generator 16 is provided on the inner wall of the equipment bin 11, and a microbubble generator 14 is provided on the upper end of the equipment bin 11. The nitrogen generator The output end of 16 is connected to the input end of the microbubble generator 14, the output end of the water pump 8 is connected to one end of the output pipe 29, the other end of the output pipe 29 is connected to the input end of the microbubble generator 14, the output end of the microbubble generator 14 is connected to one end of the large warehouse pipeline 17, the other end of the large warehouse pipeline 17 is arranged in the large warehouse 1, a butterfly valve 6 28 is arranged on the large warehouse pipeline 17, the lower end of the side wall of the butterfly valve 6 28 is connected to the connecting pipe 26, the pipe 26 is provided with a butterfly valve 5 27, the output end of the pipe 26 is arranged in the small warehouse 2, and a sedimentation tank 3 31 is arranged at the bottom end of one side of the interior of the large warehouse 1.

[0026] When in use, the input end of the mud mixer 13 is connected to mud, and the mud enters the small warehouse 2 after being stirred by the mud cyclone 15. The butterfly valve three 6 is opened, the butterfly valve one 4 and the butterfly valve two 5 are closed, and the water pump 8 is started. The foaming liquid connected to the liquid inlet 30 enters the input end of the microbubble generator 14 through the output pipe two 29, and enters the large warehouse pipeline 17 after merging with the nitrogen generated by the nitrogen generator 16. The butterfly valve five 27 is opened, the butterfly valve six 28 is closed, and the nitrogen foaming liquid enters the small warehouse 2 through the pipeline 26. The nitrogen foaming liquid and the mud are stirred and mixed by the agitator two 10. Close the butterfly valve five 27, butterfly valve three 6 and butterfly valve one 4, open butterfly valve two 5, and use the water pump 8 to let the microbubble mud in the small bin 2 pass through the mud pumping pipe two 7, mud pumping pipe one 3, output pipe two 29, microbubble generator 14 and large bin pipeline 17 into the large bin 1, and finally open the butterfly valve four 20 and the skid-mounted pump 21 to transport the mud to the blocking part of the shallow casing. The output end of the output pipe one 24 rotates to drive the control box 25 to rotate, thereby stirring the microbubble mud in the large bin 1. The above is the overall working process of the present invention, and this step can be repeated the next time it is used.

[0027] It can be seen from the above embodiments that the beneficial effects of the present invention are:

[0028] The nitrogen and foaming liquid are mixed by the microbubble generator to generate microbubbles. These microbubbles can penetrate into small cracks and pores, and form microbubble mud with good fluidity after mixing with mud. This mud can more effectively cover and plug multiple leaks on shallow casing, especially those fine cracks that are difficult to reach by traditional methods, thereby significantly improving the plugging efficiency; the microbubbles in the microbubble mud can form a dense network structure during the solidification process, which not only enhances the plugging strength of the mud, but also effectively prevents the fluid from leaking through the cracks again. At the same time, the stirring action of the agitator 2 ensures the full mixing of the nitrogen foaming liquid and the mud, so that the microbubbles are more evenly distributed in the mud, further improving the plugging effect; the proportion and fluidity of the microbubble mud can be adjusted according to the size of the flow area of ​​different leaks to better adapt to various complex leakage situations. This flexibility makes the device more adaptable and practical when dealing with various leakage problems of shallow casing; the operator can easily control the generation, mixing and transportation process of the microbubble mud, reducing the complexity and difficulty of the plugging operation.

[0029] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A microbubble solidification bridge slurry device, characterized in that: The invention comprises a combined tank body (19), characterized in that: a large bin (1) is provided on one side of the combined tank body (19), a small bin (2) is provided on one side of the large bin (1), an equipment bin (11) is provided on one side of the small bin (2), a stirrer 1 (9) is provided inside the large bin (1), a stirrer 2 (10) is provided inside the small bin (2), a mud mixer (13) is sleeved on the upper end of the small bin (2), an input end of the mud mixer (13) is externally connected to mud, and an output end of the mud mixer (13) is connected to mud. The input end of the slurry cyclone (15), the internal bottom end of the large bin (1) is provided with a sedimentation tank (22), the internal bottom end of the small bin (2) is provided with a sedimentation tank (23), the internal bottom end of the equipment bin (11) is provided with a water pump (8), the input end of the water pump (8) is connected to the side wall of the mud extraction pipe (3), one end of the mud extraction pipe (3) is arranged in the sedimentation tank (22), the other end of the mud extraction pipe (3) is provided with a liquid inlet (30), the liquid inlet (30) is externally connected to the foaming liquid, and the mud extraction pipe (3) is provided with a liquid inlet (30). One end of a second mud extraction pipe (7) is connected to the side wall, the other end of the second mud extraction pipe (7) is arranged in a second sedimentation tank (23), a butterfly valve (5) is arranged on the second mud extraction pipe (7), a butterfly valve (4) is arranged on one side of the first mud extraction pipe (3), and a butterfly valve (6) is arranged on the other side of the first mud extraction pipe (3), a nitrogen generator (16) is arranged on the inner side wall of the equipment bin (11), a microbubble generator (14) is arranged at the upper end of the equipment bin (11), and the output end of the nitrogen generator (16) is connected to the output end of the microbubble generator (14) through the output end of the nitrogen generator (16) The input end of the water pump (8) is connected to one end of the output pipe (29), the other end of the output pipe (29) is connected to the input end of the microbubble generator (14), the output end of the microbubble generator (14) is connected to one end of the large bin pipeline (17), the other end of the large bin pipeline (17) is arranged in the large bin (1), a butterfly valve (28) is arranged on the large bin pipeline (17), the lower end of the side wall of the butterfly valve (28) is connected to the pipeline (26), and the pipeline (26) is provided with a butterfly valve (27).

2. A microbubble solidification bridge slurry device according to claim 1, characterized in that: The output end of the pipeline (26) is arranged in the small warehouse (2).

3. A microbubble solidification bridge slurry device according to claim 2, characterized in that: A control box (25) is provided on the other side of the interior of the equipment compartment (11).

4. A microbubble solidification bridge slurry device according to claim 3, characterized in that: The stirrer 1 (9) comprises a motor (31), the motor (31) is provided with a top end of the large bin (1), the output end of the motor (31) is connected to a stirring rod (32), and the stirrer 2 (10) and the stirrer 1 (9) have the same structure.

5. A microbubble solidification bridge slurry device according to claim 4, characterized in that: The lower end of the outer wall of the large bin (1) is connected to an output pipe (24), a skid-mounted pump (21) is provided on the output pipe (24), a butterfly valve (20) is provided on the skid-mounted pump (21), and the skid-mounted pump (21) is arranged on one side of the butterfly valve (20).

6. A microbubble solidification bridge slurry device according to claim 5, characterized in that: The butterfly valve 1 (4) is arranged on the left side of the butterfly valve 2 (5).

7. A microbubble solidification bridge slurry device according to claim 6, characterized in that: A ladder (12) is provided on one side of the combined tank body (19), and a sedimentation tank 3 (31) is provided on the bottom end of one side of the interior of the large warehouse (1).

8. A method for using a microbubble solidification bridge slurry device, characterized in that: The microbubble curing bridge slurry device according to claim 7 comprises the following steps: Step 1: The input end of the mud mixer (13) is connected to mud, and the mud is stirred by the mud cyclone (15) and then enters the small bin (2); Step 2: Open butterfly valve 3 (6), close butterfly valve 1 (4) and butterfly valve 2 (5), start water pump (8), the foaming liquid connected to the liquid inlet (30) enters the input end of the microbubble generator (14) through output pipe 2 (29), and then enters the large warehouse pipeline (17) after merging with the nitrogen generated by the nitrogen generator (16), open butterfly valve 5 (27), close butterfly valve 6 (28), the nitrogen foaming liquid enters the small warehouse (2) through pipeline (26), and stirs and mixes the nitrogen foaming liquid and mud using stirrer 2 (10); Step 3: Close butterfly valve 5 (27), butterfly valve 3 (6) and butterfly valve 1 (4), open butterfly valve 2 (5), and use water pump (8) to pump the microbubble mud in the small bin (2) through mud pumping pipe 2 (7), mud pumping pipe 1 (3), output pipe 2 (29), microbubble generator (14) and large bin pipeline (17) into the large bin (1). Finally, open butterfly valve 4 (20) and skid-mounted pump (21) to transport the mud to the plugging position of the shallow casing. The output end of output pipe 1 (24) rotates to drive the control box (25) to rotate, thereby stirring the microbubble mud in the large bin (1).

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