Secondary purification system
By separating mud and gas through a vacuum pump and stirring mechanism in the secondary purification system, and treating the pure gas with an igniter, the problem of insufficient purification capacity of existing degassing equipment is solved, achieving efficient mud purification and environmental protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SINOPEC OILFIELD SERVICE CORPORATION
- Filing Date
- 2025-05-29
- Publication Date
- 2026-05-12
AI Technical Summary
Existing degassing equipment has insufficient purification capacity, cannot achieve the required initial pressure, has excessively high negative pressure, and is difficult to detect when sludge flows out of the exhaust pipe outlet, leading to environmental pollution and shortened equipment lifespan.
A secondary purification system is adopted, including a degassing tank and a secondary purification tank. A vacuum pump is used to create negative pressure, which, combined with a stirring mechanism and an igniter, achieves the separation and purification of mud and gas. The secondary purification enhances the purification capacity and reduces environmental pollution.
It improves degassing capacity, prevents mud from flowing out, extends equipment life, reduces environmental pollution, and enables safe and reliable operation.
Smart Images
Figure CN224220810U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oil and petrochemical drilling, and in particular to a secondary purification system. Background Technology
[0002] During drilling, especially in underbalanced drilling, when encountering oil or gas formations, the drilling fluid can become contaminated with gas. If this contamination is not addressed promptly, it can lead to various problems, from reduced drilling pump efficiency and fluid flow interruption to a decrease in fluid density and a vicious cycle, causing a sharp drop in well fluid column pressure and potentially resulting in a blowout. Therefore, degassing equipment is essential when drilling exploration wells, gas wells, or wells with high gas-oil ratios.
[0003] The problems encountered during use include: insufficient purification capacity of the degassing tank, inability to reach the initial pressure, excessively high negative pressure, mud flowing out of the exhaust pipe outlet, and mud overflow from the exhaust pipe outlet being difficult to detect and causing environmental pollution. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a secondary purification system.
[0005] To achieve the above objectives, this utility model adopts the following technical solution: a secondary purification system, including a degassing tank, the top of which is bolted to a degassing cover. An agitation mechanism is installed inside the degassing tank, the agitation mechanism including a motor. The bottom of the motor is fixedly connected to the top of the degassing cover. A rotating shaft is fixedly connected to the output end of the motor. Two bucket-shaped agitator blades are fitted onto the outer wall of the rotating shaft. A sludge discharge port is located at the bottom of the degassing tank. A baffle is installed inside the sludge discharge port. A turntable is fixedly connected to the outer wall of the baffle, and the turntable is located outside the sludge discharge port. A support plate is fixedly connected to the outer wall of the degassing tank. A vacuum pump is fixedly connected to the top of the support plate. A first air guide pipe is fixedly connected to the top of the vacuum pump. The other end of the first air guide pipe is fixedly connected to the top of the degassing top cover. A second air guide pipe is fixedly connected to the side wall of the vacuum pump. A secondary purification tank is provided on the right side of the degassing tank. A stirring mechanism is provided inside the secondary purification tank. The secondary purification tank is connected to the degassing tank through the support plate. A purification top cover is bolted to the top of the secondary purification tank. A drain port is fixedly connected to the outer wall of the secondary purification tank. A drain valve is fixedly connected to the top of the drain port.
[0006] As a further description of the above technical solution:
[0007] A liquid storage tank is provided on the left side of the degassing tank. A liquid storage cover is bolted to the top of the liquid storage tank. An inlet is fixedly connected to the top of the liquid storage cover. A guide pipe is fixedly connected to the top of the degassing cover. The other end of the guide pipe extends into the interior of the liquid storage tank.
[0008] As a further description of the above technical solution:
[0009] An exhaust pipe is fixedly connected to the top of the purification top cover. A combustion chamber is provided on the right side of the secondary purification tank. A cover is bolted to the top of the combustion chamber. The other end of the exhaust pipe is fixedly connected to the top of the cover. An igniter is fixedly connected to the outer wall of the combustion chamber. The ignition end of the igniter is located inside the combustion chamber.
[0010] As a further description of the above technical solution:
[0011] The bottom of the liquid storage tank, degassing tank, and secondary purification tank are all fixedly connected with wide plate support legs, and there are multiple wide plate support legs in each case.
[0012] As a further description of the above technical solution:
[0013] The bottom of the combustion chamber is fixedly connected to a narrow plate support leg, and there are multiple narrow plate support legs. Sealing gaskets are provided in the interlayer between the degassing top cover and the degassing tank, the interlayer between the secondary purification tank and the purification top cover, and the interlayer between the liquid storage tank and the liquid storage top cover.
[0014] As a further description of the above technical solution:
[0015] The liquid storage tank is connected to the degassing tank via a guide pipe, and the secondary purification tank is connected to the combustion chamber via an exhaust pipe.
[0016] This utility model has the following beneficial effects:
[0017] 1. During device operation, the vacuum pump starts, creating a negative pressure inside the degassing tank through the first air guide pipe. This negative pressure, generated by the vacuum pump, ensures sufficient initial pressure and maintains a constant pump pressure to prevent excessive negative pressure. This draws the slurry from the storage tank into the degassing tank. During this process, the stirring mechanism in the degassing tank operates. The motor drives the rotating shaft, and two bucket-shaped stirring blades fitted on the outer wall of the shaft rotate accordingly. This separation of gas mixed in the slurry from the slurry by the rotating blades achieves degassing. The gas then passes through the first and second air guide pipes into the secondary purification tank. The secondary purification tank also has a stirring mechanism, but this mechanism only includes… It includes a bucket-shaped stirring blade for secondary degassing. Through secondary degassing, the purification capacity of the entire device is improved, preventing mud from flowing out of the exhaust pipe outlet. The separated gas is pure gas. After being treated by the secondary purification tank, the pure gas enters the combustion chamber through the exhaust pipe. Then, the igniter ignites the gas in the combustion chamber. After being discharged, it can reduce environmental pollution and extend the service life of the equipment, further improving the overall degassing capacity. The liquid in the secondary purification tank can be discharged by opening and closing the drain valve. The state of the discharged liquid can be observed to determine whether it contains mud, reducing environmental pollution. Visual operation is more direct, reduces a lot of labor, and has high safety and reliability. Attached Figure Description
[0018] Figure 1 This is a first-view overall structural diagram of the secondary purification system proposed in this utility model.
[0019] Figure 2 This is a schematic diagram of the internal stirring mechanism of the degassing tank in the secondary purification system proposed in this utility model.
[0020] Figure 3 This is a schematic diagram of the internal stirring mechanism of the secondary purification tank in the secondary purification system proposed in this utility model.
[0021] Figure 4 This is a schematic diagram of the internal structure of the secondary purification system proposed in this utility model;
[0022] Figure 5 This is a front plan view of the secondary purification system proposed in this utility model.
[0023] Legend:
[0024] 1. Degassing tank; 2. Degassing top cover; 3. Stirring mechanism; 301. Motor; 302. Rotating shaft; 303. Bucket-shaped stirring blades; 4. Sludge discharge port; 5. Baffle; 6. Turntable; 7. Support plate; 8. Vacuum pump; 9. First air guide pipe; 10. Second air guide pipe; 11. Secondary purification tank; 12. Purification top cover; 13. Drain port; 14. Drain valve; 15. Storage tank; 16. Storage top cover; 17. Inlet; 18. Guide pipe; 19. Exhaust pipe; 20. Combustion chamber; 21. Cover; 22. Igniter; 23. Wide plate support leg; 24. Narrow plate support leg; 25. Sealing gasket. Detailed Implementation
[0025] Reference Figure 1-5 The secondary purification system provided by this utility model includes a degassing tank 1, with a degassing top cover 2 bolted to the top of the degassing tank 1. An agitation mechanism 3 is installed inside the degassing tank 1, including a motor 301. The bottom of the motor 301 is fixedly connected to the top of the degassing top cover 2. A rotating shaft 302 is fixedly connected to the output end of the motor 301. Two bucket-shaped agitator blades 303 are fitted onto the outer wall of the rotating shaft 302. A sludge discharge port 4 is provided at the bottom of the degassing tank 1, with a baffle 5 inside the sludge discharge port 4. A turntable 6 is fixedly connected to the outer wall of the baffle 5. Rotating the turntable 6 can cause the baffle 5 to flip, allowing the sludge in the degassing tank 1 to be discharged in time. The turntable 6 is located outside the sludge discharge port 4. A support plate 7 is fixedly connected to the outer wall of the degassing tank 1, with a vacuum pump 8 fixedly connected to the top of the support plate 7. A first air guide pipe 9 is fixedly connected to the top of the vacuum pump 8. The other end is fixedly connected to the top of the degassing top cover 2. The side wall of the vacuum pump 8 is fixedly connected to the second gas guide pipe 10. The right side of the degassing tank 1 is provided with a secondary purification tank 11. The interior of the secondary purification tank 11 is provided with a stirring mechanism 3. The secondary purification tank 11 is connected to the degassing tank 1 through a support plate 7. The top of the secondary purification tank 11 is connected to a purification top cover 12 by bolts. The outer wall of the secondary purification tank 11 is fixedly connected with a drain port 13. The top of the drain port 13 is fixedly connected with a drain valve 14 to facilitate draining and analysis of the separation effect of the vacuum pump 8. The left side of the degassing tank 1 is provided with a liquid storage tank 15. The top of the liquid storage tank 15 is connected to a liquid storage top cover 16 by bolts. The top of the liquid storage top cover 16 is fixedly connected with a liquid inlet 17. The top of the degassing top cover 2 is fixedly connected with a guide pipe 18. The other end of the guide pipe 18 extends into the interior of the liquid storage tank 15. The liquid storage tank 15 is connected to the degassing tank 1 through the guide pipe 18.
[0026] When the device is running, the vacuum pump 8 starts, creating a negative pressure inside the degassing tank 1 through the first air guide pipe 9. This negative pressure, generated by the vacuum pump 8, ensures sufficient initial pressure and maintains a constant pressure to prevent excessively high negative pressure. This draws the slurry from the storage tank 15 into the degassing tank 1. During this process, the stirring mechanism 3 in the degassing tank 1 operates, and the motor 301 drives the rotating shaft 302. Two bucket-shaped stirring blades 303 fitted on the outer wall of the rotating shaft 302 rotate accordingly, separating the gas mixed in the slurry from the slurry, thus achieving degassing. The gas then passes through the first air guide pipe 9 and the second air guide pipe 10 into the secondary purification tank 11. Since the secondary purification tank 11 is also equipped with a stirring mechanism 3, and the secondary purification tank 11 contains… The stirring mechanism consists of three bucket-shaped stirring blades 303, which serve as secondary degassing devices. Through secondary degassing, the purification capacity of the entire device is improved, preventing mud from flowing out of the exhaust pipe outlet. The separated gas is pure gas. After being treated by the secondary purification tank 11, the pure gas enters the combustion chamber 20 through the exhaust pipe 19. Then, the igniter 22 ignites the gas in the combustion chamber 20. After being discharged, it can reduce environmental pollution and extend the service life of the equipment, further improving the overall degassing capacity. The liquid in the secondary purification tank 11 can be discharged by opening and closing the drain valve 14. The state of the discharged liquid can be observed to determine whether it contains mud, reducing environmental pollution. Visual operation is more direct, reducing a lot of labor, and ensuring high safety and reliability.
[0027] An exhaust pipe 19 is fixedly connected to the top of the purification top cover 12. A combustion chamber 20 is provided on the right side of the secondary purification tank 11. The secondary purification tank 11 is connected to the combustion chamber 20 through the exhaust pipe 19. A cover 21 is bolted to the top of the combustion chamber 20. The other end of the exhaust pipe 19 is fixedly connected to the top of the cover 21. An igniter 22 is fixedly connected to the outer wall of the combustion chamber 20. The ignition end of the igniter 22 is located inside the combustion chamber 20.
[0028] After being treated by the secondary purification tank 11, the pure gas enters the combustion chamber 20 through the exhaust pipe 19. Then, the igniter 22 ignites the gas in the combustion chamber 20, which reduces environmental pollution after being discharged.
[0029] The bottom of the liquid storage tank 15, the degassing tank 1, and the secondary purification tank 11 are all fixedly connected with wide plate support legs 23, and there are multiple wide plate support legs 23. The bottom of the combustion chamber 20 is fixedly connected with narrow plate support legs 24, and there are multiple narrow plate support legs 24. Sealing gaskets 25 are provided in the interlayer between the degassing top cover 2 and the degassing tank 1, the interlayer between the secondary purification tank 11 and the purification top cover 12, and the interlayer between the liquid storage tank 15 and the liquid storage top cover 16.
[0030] Working principle: When the device is running, the vacuum pump 8 starts, creating a negative pressure inside the degassing tank 1 through the first air guide pipe 9, drawing the slurry from the storage tank 15 into the degassing tank 1. During this process, the stirring mechanism 3 in the degassing tank 1 operates, and the motor 301 drives the rotating shaft 302 to rotate. The two bucket-shaped stirring blades 303 fitted on the outer wall of the rotating shaft 302 rotate accordingly, separating the gas mixed in the slurry from the slurry as the two bucket-shaped stirring blades 303 rotate, achieving the degassing effect. The gas then passes through the first air guide pipe 9 and the second air guide pipe 10 into the secondary purification tank 11. The secondary purification tank 11 is also equipped with a stirring mechanism 3, and the stirring mechanism 3 in the secondary purification tank 11 only includes a bucket-shaped stirring blade 303, which serves as a secondary degassing device. At this time, the separated gas is pure gas. After being processed by the secondary purification tank 11, the pure gas enters the combustion chamber 20 through the exhaust pipe 19. Then, the igniter 22 ignites the gas in the combustion chamber 20. After being discharged, it can reduce environmental pollution and extend the service life of the equipment, further improving the overall degassing capacity. Visual operation is more direct, reducing a lot of labor and ensuring high safety and reliability.
[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A secondary purification system, comprising a degassing tank (1), characterized in that: The top of the degassing tank (1) is bolted to a degassing top cover (2). An agitation mechanism (3) is installed inside the degassing tank (1). The agitation mechanism (3) includes a motor (301). The bottom of the motor (301) is fixedly connected to the top of the degassing top cover (2). A rotating shaft (302) is fixedly connected to the output end of the motor (301). Two bucket-shaped agitator blades (303) are fitted onto the outer wall of the rotating shaft (302). A mud discharge port (4) is installed at the bottom of the degassing tank (1). A baffle (5) is installed inside the mud discharge port (4). A turntable (6) is fixedly connected to the outer wall of the baffle (5). The turntable (6) is located outside the mud discharge port (4). A support plate (7) is fixedly connected to the outer wall of the degassing tank (1). A vacuum pump (8) is fixedly connected to the top of the support plate (7), and a first gas guide pipe (9) is fixedly connected to the top of the vacuum pump (8). The other end of the first gas guide pipe (9) is fixedly connected to the top of the degassing top cover (2). A second gas guide pipe (10) is fixedly connected to the side wall of the vacuum pump (8). A secondary purification tank (11) is provided on the right side of the degassing tank (1). A stirring mechanism (3) is provided inside the secondary purification tank (11). The secondary purification tank (11) is connected to the degassing tank (1) through the support plate (7). A purification top cover (12) is bolted to the top of the secondary purification tank (11). A drain port (13) is fixedly connected to the outer wall of the secondary purification tank (11). A drain valve (14) is fixedly connected to the top of the drain port (13).
2. The secondary purification system according to claim 1, characterized in that: A liquid storage tank (15) is provided on the left side of the degassing tank (1). A liquid storage top cover (16) is bolted to the top of the liquid storage tank (15). An inlet (17) is fixedly connected to the top of the liquid storage top cover (16). A guide pipe (18) is fixedly connected to the top of the degassing top cover (2). The other end of the guide pipe (18) extends into the interior of the liquid storage tank (15).
3. The secondary purification system according to claim 2, characterized in that: An exhaust pipe (19) is fixedly connected to the top of the purification top cover (12). A combustion chamber (20) is provided on the right side of the secondary purification tank (11). A cover (21) is bolted to the top of the combustion chamber (20). The other end of the exhaust pipe (19) is fixedly connected to the top of the cover (21). An igniter (22) is fixedly connected to the outer wall of the combustion chamber (20). The ignition end of the igniter (22) is located inside the combustion chamber (20).
4. The secondary purification system according to claim 2, characterized in that: The bottom of the liquid storage tank (15), the degassing tank (1) and the secondary purification tank (11) are all fixedly connected with wide plate support legs (23), and there are multiple wide plate support legs (23).
5. The secondary purification system according to claim 3, characterized in that: The bottom of the combustion chamber (20) is fixedly connected to a narrow plate support leg (24), and there are multiple narrow plate support legs (24). Sealing gaskets (25) are provided in the interlayer between the degassing top cover (2) and the degassing tank (1), the interlayer between the secondary purification tank (11) and the purification top cover (12), and the interlayer between the liquid storage tank (15) and the liquid storage top cover (16).
6. The secondary purification system according to claim 3, characterized in that: The liquid storage tank (15) is connected to the degassing tank (1) through the guide pipe (18), and the secondary purification tank (11) is connected to the combustion chamber (20) through the exhaust pipe (19).