A petroleum drilling mud cooling system

Abstract

The application relates to the technical field of oil drilling equipment, and particularly discloses an oil drilling mud cooling system, which comprises a mud pool and an inner protection cylinder installed above the mud pool, the upper end of the inner protection cylinder is provided with an opening, an outer protection cylinder is arranged on the outer interval of the inner protection cylinder, the lower end of the outer protection cylinder is provided with an opening, and a material falling channel is formed between the outer protection cylinder and the inner protection cylinder; a material inlet cylinder penetrating through the outer protection cylinder is installed at the upper end of the outer protection cylinder, a material throwing mechanism for throwing the mud falling out of the material inlet cylinder into the material falling channel and an air cooling mechanism for air cooling and cooling the mud thrown into the material falling channel are arranged in the inner protection cylinder directly below the material inlet cylinder. The material throwing mechanism can throw the mud falling out of the material inlet cylinder into the material falling channel, specifically, the gathered mud is scattered outward due to centrifugal force, and is naturally cooled in the process of scattering; when the mud is scattered into the material falling channel, the air cooling mechanism blows the scattered mud again, further cools the mud, and thus the mud is rapidly cooled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil drilling equipment, in particular to an oil drilling mud cooling system. BACKGROUND

[0002] In the process of drilling oil, the drilling tool will cut the rock, thereby generating a large amount of heat, and the drilling tool will also generate a large amount of heat by friction with the hole wall. Moreover, as the drilling depth increases, the bottom hole temperature also gradually rises. These heat is transferred to the mud and taken out of the well. In this process, the temperature of the mud gradually rises. High-temperature mud can cause corrosion to the drilling tool and the conveying equipment, shorten the service life of the drilling tool, and also affect the composition of the mud and the function of the mud. Since the mud used in current land drilling and oil drilling is configured according to the geological conditions, the cost is high, so the mud liquid is usually recycled. In order to prevent the high-temperature mud from repeatedly entering the bottom of the hole, a mud cooling system needs to be used to cool the mud, thereby rapidly reducing the temperature of the high-temperature mud.

[0003] A Chinese patent document with publication number CN111238253A discloses a kind of oil drilling mud forced cooling system, including support and mud cooling tank;Support is the rectangular frame structure of upper opening;Mud cooling tank includes tank body, chassis, filler layer, cooling fan, spraying system, mud collection groove and discharge groove;Cooling fan is located just above filler layer;Mud collection groove is located just below filler layer;Discharge groove is connected with mud collection groove;Spraying system is fixed between filler layer and cooling fan;Support bottom is fixedly provided with mud delivery pump, and the discharge port of mud delivery pump is connected with the inlet of spraying system through mud delivery pipe;The bottom of the chassis of mud cooling tank is provided with a rotary telescopic mechanism.

[0004] When working, mud delivery pump extracts mud in mud tank and pumps it to cooling tank spraying system, and spraying system sprays mud downward. Hot mud is uniformly distributed to each spray head by spraying system, and hot mud is sprayed downward to filler layer by spray head. By means of top electric fan, cold air outside mud cooling tank is forcibly sucked into tank body through lower part of mud cooling tank. Hot mud on filler layer is exchanged with cold air sucked into mud cooling tank and hot mud on filler layer, so as to cool mud.

[0005] Regarding the aforementioned technologies, drilling mud flowing back from the borehole differs from liquid; its flow rate is slower, making it prone to clogging. Furthermore, the mud inevitably contains fine solid particles, which are difficult to completely remove even with pre-treatment. After the mud is pumped into the cooling tank by the mud delivery pump, it is sprayed through various nozzles. At this point, the mud itself and the solid particles it contains may clog the nozzles, affecting the spraying process. Moreover, when the mud enters the packing layer, the mud and its embedded solid particles also cause some degree of blockage, hindering sufficient heat exchange between the air and the mud in the packing layer, further affecting the cooling effect and resulting in poor cooling efficiency of the entire cooling system. Therefore, improvements are needed. Summary of the Invention

[0006] In order to improve the poor cooling effect caused by the easy clogging of the cooling system by mud, this application provides an oil drilling mud cooling system.

[0007] This application provides an oil drilling mud cooling system, which adopts the following technical solution:

[0008] An oil drilling mud cooling system includes a mud tank and an inner casing installed above the mud tank. The upper end of the inner casing is open, and an outer casing is spaced outside the inner casing. The lower end of the outer casing is open, and a material discharge channel is formed between the outer casing and the inner casing. A feed cylinder is installed at the upper end of the outer casing, penetrating the outer casing. The inner casing directly below the feed cylinder is provided with a material throwing mechanism for throwing mud falling out of the feed cylinder into the material discharge channel and an air cooling mechanism for air cooling the mud thrown into the feed channel.

[0009] By adopting the above technical solution, when the high-temperature slurry falls into the feed cylinder under the drive of external equipment, the slurry first falls through the feed cylinder and then enters the throwing mechanism. The throwing mechanism rotates, causing the slurry to be dispersed outward by centrifugal force. At this time, the slurry is dispersed into smaller liquid particles. The slurry in the form of liquid particles will naturally cool down during the dispersion process. After the slurry disperses into the discharge channel, the air-cooling mechanism will blow the dispersed slurry again, making the distance the slurry disperses in the air longer, thus making the natural cooling effect of the slurry better. The air-cooling mechanism itself can also cool the dispersed slurry, thereby achieving rapid cooling of the slurry. In this solution, the technical defect of slurry being easily blocked in the cooling system and causing poor cooling effect is improved, making the cooling effect of the entire cooling system better.

[0010] Optionally, the material throwing mechanism includes a mud-throwing cylinder rotatably installed inside the inner protective cylinder and a driving assembly for driving the mud-throwing cylinder to rotate. The inner wall of the mud-throwing cylinder is wide-mouthed from near the bottom of the mud-throwing cylinder to away from the bottom of the mud-throwing cylinder, and the upper end of the mud-throwing cylinder is higher than or flush with the upper end of the inner protective cylinder. The driving assembly is located below the mud-throwing cylinder. The air outlet of the air-cooling mechanism is located between the upper end of the inner protective cylinder and the upper end of the mud-throwing cylinder.

[0011] By adopting the above technical solution, when the drive component is working, it will drive the mud-throwing cylinder to rotate. At the same time, the mud falls into the mud-throwing cylinder from the lower end of the feed cylinder. Due to the rotation of the mud-throwing cylinder, the mud that comes into contact with the inner wall of the mud-throwing cylinder will be splashed outward by centrifugal force. In this process, the mud will be dispersed into tiny liquid particles. The outwardly dispersed liquid particles can fully contact the cold air, so that the mud can be cooled down quickly. The air-cooling mechanism can also further cool the mud. The air-cooling mechanism can also carry the hot air in the discharge channel out of the outer casing, so that the air in the discharge channel can exchange heat with the air outside the outer casing, thereby cooling the mud quickly.

[0012] Optionally, the inner wall of the mud-throwing cylinder is curved and concave.

[0013] By adopting the above technical solution, when the mud comes into contact with the inner wall of the mud-throwing cylinder, the mud will be thrown into the material discharge channel by the mud-throwing cylinder. The curved inner wall of the mud-throwing cylinder reduces the mud dispersion angle and reduces the possibility of mud splashing onto the inner top wall of the outer casing, thereby reducing the adhesion of mud to the inner wall of the outer casing.

[0014] Optionally, the drive assembly includes a drive component and a drive shaft coaxially fixed on the drive component, the drive shaft being vertically arranged and perpendicular to the bottom of the mud-throwing cylinder;

[0015] The air-cooling mechanism includes multiple air ducts disposed in the inner cavity of the inner casing, multiple fans disposed in each air duct, and a linkage component that drives each fan to rotate. One end of each air duct is located between the upper end of the inner casing and the upper end of the mud-throwing cylinder, and the other end is disposed near the drive shaft and communicates with the cold air outside the outer casing. The fan is located at the end of the air duct near the drive shaft, and the drive shaft can drive the fan to rotate through the linkage component.

[0016] By adopting the above technical solution, when the driving component drives the drive shaft to rotate, the drive shaft can drive the mud-throwing cylinder to rotate, thereby dispersing the mud. When the drive shaft rotates, it can also drive the linkage component to work, so that the linkage component drives the corresponding fan to rotate. The air generated by the fan can be blown into the material guide channel through the air guide pipe, thereby further dispersing and cooling the scattered mud.

[0017] Optionally, the linkage component includes a driving bevel gear coaxially fixed on the driving shaft, and a plurality of driven bevel gears and a plurality of driven shafts corresponding to each of the fans. Each driven bevel gear meshes with the driving bevel gear, and each fan is coaxially connected to the corresponding driven bevel gear through each driven shaft.

[0018] By adopting the above technical solution, when the drive shaft rotates, the drive shaft drives the drive bevel gear to rotate, the drive bevel gear drives the driven bevel gear that meshes with it to rotate, and the driven bevel gear drives the corresponding fan to rotate through the driven shaft, thereby blowing away and cooling the mud in the material discharge channel.

[0019] Optionally, the ratio of the pitch circle diameter of the driving bevel gear to that of the driven bevel gear is greater than or equal to 4:1.

[0020] By adopting the above technical solution, the ratio of the rotational speeds on the driven shaft and the driving shaft is greater than or equal to four to one, thereby enabling the driven shaft to drive the fan to rotate at a faster speed, thus generating stronger airflow and improving the air-cooling effect on the mud.

[0021] Optionally, the feed cylinder is rotatably mounted on the upper end of the outer protective cylinder, and multiple fixing columns for connection and fixation are provided between the feed cylinder and the mud-throwing cylinder.

[0022] By adopting the above technical solution, the fixed column can fix the feed cylinder and the slurry throwing cylinder to each other, so that the feed cylinder can rotate together with the slurry throwing cylinder. This allows the slurry entering the feed cylinder to be dispersed due to centrifugal motion, making the slurry falling into the slurry throwing cylinder more dispersed and smaller in volume. At this time, the slurry throwing cylinder has a better dispersion effect on the slurry, thus resulting in a better cooling effect on the slurry.

[0023] Optionally, a vortex-shaped guide plate is provided on the inner wall of the end of the feed cylinder near the mud-throwing cylinder.

[0024] By adopting the above technical solution, when the mud enters the feed cylinder, the guide plate can drive the mud to fall in a vortex, making the mud fall faster. The guide plate can also separate the mud entering the feed cylinder, so that the mud is dispersed as soon as it enters the feed cylinder, further improving the dispersion effect of the mud-throwing cylinder, thereby making the mud cooler better.

[0025] Optionally, a guide ring is provided between the inner protective cylinder and the upper port of the mud-throwing cylinder. The guide ring is flush with the upper end of the mud-throwing cylinder, and multiple air guide ports are opened at the upper end of the guide ring. Each air guide pipe is connected to the guide ring.

[0026] By adopting the above technical solution, the air generated by several fans can be sprayed out in all directions, thereby dissipating heat and dispersing the mud that is flying in all directions, thus improving the heat dissipation effect of the mud.

[0027] Optionally, each of the air inlets is provided with an air guide plate for guiding air, and each air guide plate extends outward in a wide-mouth shape.

[0028] By adopting the above technical solution, the air guide plate can guide the air flowing out of the air guide port, so that the mud can be dispersed in the direction of the material discharge channel, thereby improving the heat dissipation effect of air cooling on the mud.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. The material throwing mechanism can throw the mud that falls outside the feed cylinder into the material discharge channel. The accumulated mud is dispersed outward by centrifugal force. During the dispersion process, it will naturally cool down. After the mud disperses into the material discharge channel, the air cooling mechanism blows the dispersed mud again to further cool down the mud, thereby rapidly cooling the mud.

[0031] 2. The fixed column can fix the feed cylinder and the sludge-throwing cylinder to each other, so that the feed cylinder can rotate together with the sludge-throwing cylinder. This allows the sludge entering the feed cylinder to be dispersed due to centrifugal motion, making the sludge falling into the sludge-throwing cylinder more dispersed and smaller in volume. At this time, the sludge-throwing cylinder has a better dispersion effect on the sludge, thus resulting in a better cooling effect on the sludge.

[0032] 3. When the mud enters the feed cylinder, the guide plate can cause the mud to fall in a vortex, making the mud fall faster. The guide plate can also separate the mud entering the feed cylinder, so that the mud is dispersed as soon as it enters the feed cylinder, which further improves the dispersion effect of the mud-throwing cylinder, thereby making the mud cooler. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of an oil drilling mud cooling system according to an embodiment of this application.

[0034] Figure 2 yes Figure 1 A partial cross-sectional view of an oil drilling mud cooling system.

[0035] Figure 3 yes Figure 2 Partial cross-sectional view of the slurry cooling device.

[0036] Reference numerals: 1. Mud tank; 2. Mud cooling device; 21. Inner casing; 211. Air inlet; 212. Fixed casing; 22. Outer casing; 23. Feed cylinder; 24. Discharge mechanism; 241. Mud discharge cylinder; 242. Drive assembly; 2421. Drive component; 2422. Drive shaft; 25. Air cooling mechanism; 251. Air duct; 252. Fan; 253. Linkage assembly; 2531. Driven bevel gear; 2532. Driven bevel gear; 2533. Driven shaft; 3. Mud guiding mechanism; 4. Return mechanism; 5. Material discharge channel; 6. Guide ring; 61. Air inlet; 611. Air guide plate; 7. Cone; 8. Fixed column; 9. Mud guide plate. Detailed Implementation

[0037] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail below.

[0038] This application discloses an oil drilling mud cooling system.

[0039] Reference Figure 1 An oil drilling mud cooling system includes a mud tank 1, a mud cooling device 2 installed in the mud tank 1, a mud guiding mechanism 3 that guides the high-temperature mud from the borehole into the mud cooling device 2, and a return mechanism 4 that guides the cooled mud from the mud tank 1 into the borehole.

[0040] Reference Figure 2 The mud cooling device 2 includes an inner casing 21 and an outer casing 22 spaced outside the inner casing 21. Multiple fixing plates for connection are fixedly welded between the inner casing 21 and the outer casing 22. The fixing plates are all vertically downward. The inner casing 21 and the outer casing 22 are both located directly above the mud tank 1, and a material drop channel 5 is formed between the inner casing 21 and the outer casing 22. The upper end of the inner casing 21 is open, and multiple air inlets 211 are opened at the bottom of the inner casing 21. The lower end of the outer casing 22 is open.

[0041] Reference Figure 2 The mud cooling device 2 also includes a feed cylinder 23 that runs through the top of the outer casing 22, a throwing mechanism 24 disposed in the inner casing 21 below the feed cylinder 23, and an air cooling mechanism 25. The throwing mechanism 24 can disperse the mud falling out of the lower end of the feed cylinder 23, while the air cooling mechanism 25 can cool the dispersed mud and further disperse the dispersed mud into smaller liquid particles.

[0042] Specifically, refer to Figure 2 and Figure 3The outer casing 22 consists of two integrally connected parts. The outer part of the outer casing 22 is funnel-shaped, while the inner part is cylindrical. The material throwing mechanism 24 includes a mud-throwing cylinder 241 rotatably mounted inside the inner casing 21 and a drive assembly 242 that drives the mud-throwing cylinder 241 to rotate. The inner wall of the mud-throwing cylinder 241 is wide-mouthed from near the bottom of the mud-throwing cylinder 241 to away from the bottom of the mud-throwing cylinder 241, and the inner wall of the mud-throwing cylinder 241 is curved and concave. When the drive assembly 242 drives the mud-throwing cylinder 241 to rotate, the curved inner wall of the mud-throwing cylinder 241 can change the splash angle of the mud, reducing the possibility of mud splashing onto the top of the outer casing 22.

[0043] Reference Figure 2 and Figure 3 The drive assembly 242 includes a drive component 2421 and a drive shaft 2422 coaxially welded and fixed to the drive component 2421. The drive component 2421 is a servo motor. In other embodiments, the drive component 2421 may also be a stepper motor, a geared motor, etc. A fixed cylinder 212 is fixed to the inner bottom wall of the inner protective cylinder 21 by bolts. The servo motor is fixedly installed in the fixed cylinder 212 by bolts, and the output shaft of the servo motor passes through the fixed cylinder 212 and is coaxially fixed to the drive shaft 2422. The drive shaft 2422 is vertically arranged and the end away from the servo motor is welded and fixed to the bottom of the mud-throwing cylinder 241.

[0044] Reference Figure 2 and Figure 3 The air-cooling mechanism 25 includes multiple air ducts 251, multiple fans 252, and a set of linkage components 253. In this embodiment, four sets of air ducts 251 and fans 252 are provided. In other embodiments, three sets, five sets, or other combinations can be selected. All four air ducts 251 are located inside the inner cavity of the inner protective cylinder 21 and are welded and fixed to the inner wall of the inner protective cylinder 21. Each air duct 251 has one end near the drive shaft 2422 and the other end near the upper end of the mud-throwing cylinder 241. The fans 252 are rotatably installed inside the end of the air duct 251 near the drive shaft 2422. When the servo motor drives the drive shaft 2422 to rotate, the drive shaft 2422 can drive each fan 252 to rotate through the linkage components 253.

[0045] Specifically, refer to Figure 3 The linkage component 253 includes a drive bevel gear 2531 coaxially sleeved and fixed on the drive shaft 2422, four driven bevel gears 2532 and four driven shafts 2533 corresponding to the four fans 252. The four driven bevel gears 2532 mesh with the drive bevel gears 2531 respectively, and the four fans 252 are coaxially connected to the corresponding driven bevel gears 2532 through each driven shaft 2533.

[0046] It is worth noting that the ratio of the pitch circle diameter of the driving bevel gear 2531 to that of the driven bevel gear 2532 is greater than or equal to 4:1. The purpose of this setting is to make the rotation speed of the fan 252 much greater than that of the drive shaft 2422, so that when the servo motor drives the drive shaft 2422 to rotate at a lower speed, the fan 252 can generate a stronger air force. At this time, the heat generated by the material throwing mechanism 24 inside the inner casing 21 is less, and the influence of this part of the heat on the heat dissipation of the mud can be ignored. In this embodiment, the ratio of the pitch circle diameter of the driving bevel gear 2531 to that of the driven bevel gear 2532 is equal to 4:1.

[0047] To improve the air guiding effect of the air duct 251, refer to Figure 3 A guide ring 6 is fixedly installed between the upper port of the inner casing 21 and the upper port of the mud-throwing cylinder 241. The guide ring 6 is hollow and flush with the upper edge of the mud-throwing cylinder 241. Multiple air guide ports 61 are opened on the upper surface of the guide ring 6, and each air guide pipe 251 is connected to the guide ring 6.

[0048] Reference Figure 2 and Figure 3 Each air vent 61 is fixedly installed with an air guide plate 611 for guiding airflow. Two air guide plates 611 are installed in each air vent 61, and all air guide plates 611 are arranged in a wide-mouth shape extending outward. When the air generated by the fan 252 blows out of the air vent 61, the air guide plate 611 can guide the direction of the airflow, so that the airflow can be sprayed out in various directions of the material discharge channel 5.

[0049] When the servo motor drives the drive shaft 2422 to rotate, the mud-throwing cylinder 241 rotates along with the drive shaft 2422. At this time, the mud that falls into the mud-throwing cylinder 241 from the feed cylinder 23 is thrown into the discharge channel 5. During this process, the mud is thrown into dispersed liquid particles, allowing the mud to fully contact the air, thereby achieving a natural air cooling effect. When smaller liquid particles enter the discharge channel 5, the air blown out of the air guide 61 can further disperse the mud into smaller particles. The air can prolong the dispersion time of the mud particles, and during the dispersion process, the air can also cool the mud particles, thereby achieving rapid cooling of the mud.

[0050] To further improve the mud-throwing effect of the mud-throwing cylinder 241, refer to Figure 2 and Figure 3A conical cone 7 is welded and fixed to the inner bottom wall of the mud-throwing cylinder 241 directly below the feed cylinder 23. The cone 7 can quickly throw the mud falling from the feed cylinder 23 onto the inner wall of the mud-throwing cylinder 241, reducing the residue of mud at the bottom of the mud-throwing cylinder 241. In addition, multiple fixing columns 8 are welded and fixed to the lower end of the feed cylinder 23. The end of the fixing column 8 away from the feed cylinder 23 is fixed to the conical surface of the cone 7. At this time, the feed cylinder 23 can rotate with the mud-throwing cylinder 241, so that the feed cylinder 23 can disperse the mud, making the mud falling into the mud-throwing cylinder 241 more loose, thereby improving the mud-throwing effect of the mud-throwing cylinder 241.

[0051] At the same time, refer to Figure 2 and Figure 3 A vortex-shaped mud guide plate 9 is also fixedly installed on the inner wall of the feed cylinder 23. The mud guide plate 9 is located at one end close to the mud throwing cylinder 241. When the feed cylinder 23 rotates, the mud guide plate 9 can accelerate the falling speed of the mud and further disperse the mud, thereby improving the mud throwing effect of the mud throwing cylinder 241 and making the mud cooling effect better.

[0052] The implementation principle of an oil drilling mud cooling system in this application embodiment is as follows: when the mud enters the feed cylinder 23 through the mud guiding mechanism 3, the servo motor drives the drive shaft 2422 to rotate, and the rotation of the drive shaft 2422 drives the feed cylinder 23 to rotate, thereby initially dispersing the mud. The dispersed mud falls onto the cone 7 and is thrown onto the inner wall of the mud throwing cylinder 241 by the cone 7. The mud throwing cylinder 241 throws the mud on the inner wall into the discharge channel 5.

[0053] At the same time, the drive shaft 2422 drives each fan 252 to rotate through the cooperation of the drive bevel gear 2531, the driven bevel gear 2532 and the driven shaft 2533. The air generated by the rotation of the fan 252 is discharged from the air guide port 61 through the air guide pipe 251. At this time, the discharged air can blow away the mud and make the mud further turn into smaller liquid particles.

[0054] Furthermore, under the influence of the wind, the mud can fly further in the air, thus increasing the falling distance of the mud and allowing it to cool down sufficiently. The wind itself can also cool the mud, enabling the mud falling into the mud pit 1 from the lower end of the material discharge channel 5 to cool down quickly. The mud falling into the mud pit 1 is then driven by the return mechanism 4 to re-enter the borehole and work with the drill bit to perform drilling operations.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An oil drilling mud cooling system, comprising a mud tank (1) and an inner casing (21) installed above the mud tank (1), wherein the upper end of the inner casing (21) is open, characterized in that: An outer casing (22) is provided around the inner casing (21) at intervals. The lower end of the outer casing (22) is open, and a material drop channel (5) is formed between the outer casing (22) and the inner casing (21). An inlet cylinder (23) is installed at the upper end of the outer casing (22) and passes through the outer casing (22). The inner casing (21) directly below the inlet cylinder (23) is provided with a material throwing mechanism (24) for throwing the mud that falls out of the inlet cylinder (23) into the material drop channel (5) and an air cooling mechanism (25) for air cooling the mud thrown into the material drop channel (5). The material throwing mechanism (24) includes a mud-throwing cylinder (241) rotatably installed inside the inner protective cylinder (21) and a driving assembly (242) for driving the mud-throwing cylinder (241) to rotate. The inner wall of the mud-throwing cylinder (241) is wide-mouthed from near the bottom end of the mud-throwing cylinder (241) to away from the bottom end of the mud-throwing cylinder (241). The upper end of the mud-throwing cylinder (241) is higher than or flush with the upper end of the inner protective cylinder (21). The driving assembly (242) is located below the mud-throwing cylinder (241). The air outlet of the air-cooling mechanism (25) is located between the upper end of the inner protective cylinder (21) and the upper end of the mud-throwing cylinder (241). The drive assembly (242) includes a drive member (2421) and a drive shaft (2422) coaxially fixed on the drive member (2421). The drive shaft (2422) is vertically arranged and perpendicular to the bottom of the mud-throwing cylinder (241). The air-cooling mechanism (25) includes multiple air ducts (251) disposed in the inner cavity of the inner casing (21), multiple fans (252) disposed in each of the air ducts (251), and a linkage assembly (253) that drives each fan (252) to rotate. One end of the air duct (251) is located between the upper end of the inner casing (21) and the upper end of the mud-throwing cylinder (241), and the other end is disposed near the drive shaft (2422) and communicates with the cold air outside the outer casing (22). The fan (252) is located at the end of the air duct (251) near the drive shaft (2422), and the drive shaft (2422) can drive the fan (252) to rotate through the linkage assembly (253).

2. The oil drilling mud cooling system according to claim 1, characterized in that: The inner wall of the mud-throwing cylinder (241) is curved and concave.

3. The oil drilling mud cooling system according to claim 1, characterized in that: The linkage assembly (253) includes a driving bevel gear (2531) coaxially fixed on the driving shaft (2422), a plurality of driven bevel gears (2532) and a plurality of driven shafts (2533) corresponding to each of the fans (252). Each driven bevel gear (2532) meshes with the driving bevel gear (2531), and each fan (252) is coaxially connected to the corresponding driven bevel gear (2532) through each driven shaft (2533).

4. The oil drilling mud cooling system according to claim 3, characterized in that: The ratio of the pitch circle diameter of the driving bevel gear (2531) to that of the driven bevel gear (2532) is greater than or equal to 4:

1.

5. The oil drilling mud cooling system according to claim 1, characterized in that: The feed cylinder (23) is rotatably mounted on the upper end of the outer protective cylinder (22), and multiple fixing columns (8) are provided between the feed cylinder (23) and the mud-throwing cylinder (241) for connection and fixation.

6. The oil drilling mud cooling system according to claim 1, characterized in that: A vortex-shaped guide plate (9) is provided on the inner wall of the feed cylinder (23) near the mud-throwing cylinder (241).

7. The oil drilling mud cooling system according to claim 1, characterized in that: A guide ring (6) is provided between the inner protective cylinder (21) and the upper port of the mud-throwing cylinder (241). The guide ring (6) is flush with the upper end of the mud-throwing cylinder (241), and multiple air guide ports (61) are opened at the upper end of the guide ring (6). Each air guide pipe (251) is connected to the guide ring (6).

8. The oil drilling mud cooling system according to claim 7, characterized in that: Each of the air inlets (61) is provided with an air guide plate (611) for guiding air, and each air guide plate (611) is arranged in a wide-mouth shape extending outward.

Images