A drilling circulation system with a drilling fluid forced cooling device

Abstract

The present invention belongs to the technical field of drilling equipment, and proposes a drilling circulation system with a drilling fluid forced cooling device, including a hollow drill, a drill pipe, a power device, a drilling fluid circulation inlet, a steel casing, a drilling fluid circulation outlet, a sediment collection pool, a sedimentation and slurry storage integrated tank, a mixing tank and an additive tank. The sedimentation and slurry storage integrated tank includes a sedimentation tank body, a slurry storage tank body and a slurry pump. The bottom of the sedimentation tank body is provided with a sludge discharge outlet and a sludge pump, and the top of the sedimentation tank body is provided with a vibrating sand remover. The cross section of the slurry storage tank body is U-shaped, and the open end of the slurry storage tank body is connected to the sedimentation tank body through a first overflow port. Air slits and reinforcing rods are provided between the two sides of the slurry storage tank body and the sedimentation tank body. Cold water heat exchange pipes are provided inside the two sides of the slurry storage tank body, and the slurry storage tank body is connected to the mixing tank through a second overflow port and a chute. The present invention is reasonably designed, can effectively combine the cooling capacity of the natural environment and reduce the system cooling energy consumption, and is suitable for large-scale promotion.

Description

Technical Field

[0001] The invention belongs to the technical field of drilling equipment, and in particular relates to a drilling circulation system with a drilling fluid forced cooling device. Background Art

[0002] Drilling fluid is the circulating flushing medium used in the hole during the drilling process. Drilling fluid is the blood of drilling, also known as drilling flushing fluid. Drilling fluid can be divided into clean water, mud, clay-free flushing fluid, emulsion, foam and compressed air according to its composition. Clean water is the earliest drilling fluid used. It does not need to be treated and is easy to use. It is suitable for intact rock formations and areas with sufficient water sources. Mud is a widely used drilling fluid, mainly suitable for unstable rock formations such as loose, cracked, prone to collapse and block falling, and swelling and peeling when exposed to water. The circulating temperature of the drilling fluid not only affects the performance of the drilling fluid, but also affects the actual service life of the drill pipe and drill barrel. In addition, the part on the ground that provides circulating power for the drilling fluid will also face various problems, including some safety hazards. Therefore, certain cooling measures will be adopted in drilling operations.

[0003] At present, the drilling fluid at the drilling site is mostly cooled naturally. For example, in the positive circulation process of the drilling fluid, the drilling fluid flows out of the steel casing and enters the sedimentation tank. Before entering the sedimentation tank, the mud is intercepted in the mud pit by a vibrating conveyor. The mud entering the sedimentation tank is naturally cooled during the sedimentation stage, including the mud entering the mud storage tank later. The temperature of the mud is controlled low by natural cooling. However, if natural cooling is performed in this way, firstly, the cooling effect is not good, and secondly, the mud circulation efficiency is low, which affects the efficiency of the drilling operation.

[0004] The existing patent CN110284845B discloses a drilling fluid forced cooling device and a low-temperature circulation drilling method, which include a coolant cooling system and a convection heat exchange system. The coolant cooling system and the convection heat exchange system are connected in series in the device. A low-temperature circulation drilling method using a drilling fluid forced cooling device adopts the above-mentioned drilling fluid forced cooling device to control the in-well temperature of the drilling fluid between 40°C and 50°C, including a drilling fluid cooling cycle and a coolant cooling cycle. The drilling technology of this invention can solve the technical bottleneck that the drilling fluid circulation temperature exceeds the temperature resistance limit of the downhole tool due to ultra-high temperature in the well. By reducing the in-well temperature of the drilling fluid, the drilling fluid circulation temperature can be effectively reduced and the working life of the downhole tool can be increased. However, the equipment does not make full use of the natural cooling capacity of the surrounding environment, resulting in a high actual energy consumption of the forced circulation system. Furthermore, for systems that use mud as the drilling circulating fluid, if the discharge cycle of the mud sediment is unreasonable or inconvenient to discharge, it will act as a hotbed and cause the temperature of the mud entering the forced cooling circulation system to remain at a high level, further increasing the load of the forced cooling circulation system and increasing energy consumption. Summary of the invention

[0005] In view of the technical problems existing in the above-mentioned drilling fluid forced cooling device, the present invention proposes a drilling circulation system with a drilling fluid forced cooling device which has a reasonable design, can effectively combine the cooling capacity of the natural environment and reduce the cooling energy consumption of the system.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is that the present invention provides a drilling circulation system with a forced cooling device for drilling fluid, comprising a hollow drill tool, a drill rod and a power device are arranged on the top of the hollow drill tool, a drilling fluid circulation inlet connected to the hollow drill tool is arranged on the top of the working surface of the hollow drill tool and the drill rod, a drilling fluid circulation outlet is arranged on the steel casing, a sedimentation and slurry storage integrated tank, a mixing tank and an additive tank are arranged on the circulation path between the drilling fluid circulation outlet and the drilling fluid circulation inlet, the sedimentation and slurry storage integrated tank comprises an open sedimentation tank body, a sludge discharge outlet is arranged at the bottom of the sedimentation tank body, a sludge pump is arranged at the sludge discharge outlet, a vibrating sand remover is arranged above the sedimentation tank body, the sand outlet end of the vibrating sand remover faces the sedimentation collection tank, and the The mud outlet end of the vibrating sand remover faces one side of the sedimentation tank body, and a slurry storage tank body distributed around three sides of the sedimentation tank body is arranged on the side of the sedimentation tank body, and the cross-section of the slurry storage tank body is U-shaped, and the tops of both sides of the slurry storage tank body are closed ends and the top of the side away from the vibrating sand remover is an open end, and the open end is connected with the sedimentation tank body through a first overflow port, and air slits and a plurality of reinforcing rods are arranged between the two sides of the slurry storage tank body and the sedimentation tank body, and cold water heat exchange pipes are arranged inside the two sides of the slurry storage tank body, and a chiller is arranged at the supply end of the cold water heat exchange pipe, and a second overflow port is arranged on one side of the slurry storage tank body, and a chute is arranged at the second overflow port, and one end of the chute is connected to a mixing tank, and a pump pipe is arranged on the mixing tank, and a mud pump is arranged on the pumping path of the pump pipe, and the output side of the mud pump is connected with the drilling fluid circulation inlet.

[0007] Preferably, the bottom of the sedimentation tank body and the bottom of the mixing tank are both serrated bottoms, which include a plurality of bottom bulges with triangular cross-sections, and the bottom bulges extend in the length direction of the sedimentation tank body and the length direction of the mixing tank, and the serrated bottom is buried below the ground surface for heat dissipation.

[0008] Preferably, both sides of the slurry storage tank body are provided with concave partition walls, and the concave partition walls divide one side of the slurry storage tank body into two slurry storage chambers. The cold water heat exchange pipe is introduced from a slurry storage chamber close to the open end and introduced into the other slurry storage chamber through a U-shaped tube arranged on the outside of the slurry storage tank body.

[0009] Preferably, the cold water heat exchange pipe extends from a high position to a low position in one slurry storage chamber and in a serpentine trajectory, and the cold water heat exchange pipe extends from a low position to a high position in another slurry storage chamber and in a serpentine trajectory.

[0010] Preferably, a turbine pump for connecting the two slurry storage chambers on the same side is provided on the outside of the slurry storage tank body, and the turbine pump introduces the mud from the slurry storage chamber near the open end into the slurry storage chamber near the vibrating sand remover, and the second overflow port is arranged on the slurry storage chamber near the vibrating sand remover.

[0011] Preferably, a turbocharger pump is provided on the conveying path between the mud pump and the drilling fluid circulation inlet, a branch pipe is provided on the output side of the turbocharger pump, a water replenishment pump is provided on the branch pipe, and a water replenishment unit is provided at the supply end of the water replenishment pump.

[0012] Preferably, a spiral nylon tube is provided on the output side of the water replenishment pump.

[0013] Preferably, the slurry storage tank body is provided with a baffle inside the slurry storage cavity near the open end thereof, and the distribution position of the baffle is closer to the open end than the cold water heat exchange pipe.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are:

[0015] 1. The present invention provides a drilling circulation system with a drilling fluid forced cooling device. A vibrating sand remover can be used to intercept a large amount of large-particle sediment in a sediment collection pool, which greatly reduces the heat load in the system. In addition, the mud can complete a certain amount of heat exchange with the natural environment during the circulation of the sedimentation and slurry storage tank and the mixing tank, which further reduces the heat load in the system and is beneficial to reducing energy consumption. At the same time, the sedimentation and slurry storage tank is assembled in two tanks, which reduces the floor space of the sedimentation tank and the slurry storage tank, and further reduces the heat load by shortening the sludge discharge cycle and increasing the mud circulation rate. The air flow rate out of the air slit is also greater than the surrounding environment, which can improve the natural cooling effect of the device.

[0016] 2. The present invention provides a drilling circulation system with a drilling fluid forced cooling device. The sedimentation and slurry storage integrated tank and the cold water heat exchange pipe adopt a two-tank combination + internal on-site heat exchange method, which improves the space concentration rate of the equipment. In addition, the divided chambers exchange heat with the cold water heat exchange pipe in turn, which is beneficial to improving the heat exchange effect and improving the forced cooling efficiency of the drilling fluid by the equipment.

[0017] 3. The present invention provides a drilling circulation system with a drilling fluid forced cooling device. By adding a vortex booster pump, a water supply pump and a spiral nylon tube, the rate of drilling fluid from the mud pump to the drilling fluid circulation inlet can be accelerated. By increasing the flow rate, the temperature can be reduced, thereby further improving the forced cooling efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a front view of a drilling circulation system with a drilling fluid forced cooling device in an embodiment;

[0020] Figure 2 This is a top view of the integrated sedimentation and slurry storage tank;

[0021] Figure 3 This is the main view of the integrated sedimentation and slurry storage tank;

[0022] Figure 4 This is a side view of a sedimentation and slurry storage integrated tank;

[0023] In the above figures, 1, hollow drilling tool; 2, drill pipe; 3, power equipment; 4, drilling fluid circulation inlet; 5, steel casing; 6, drilling fluid circulation outlet; 7, sediment collection tank; 8, sedimentation and slurry storage integrated tank; 81, sedimentation tank body; 82, sludge discharge outlet; 83, sludge pump; 84, slurry storage tank body; 841, closed end; 842, open end; 843, concave partition wall; 844, slurry storage chamber; 85, first overflow port; 86. Air slit; 87. Reinforcing rod; 88. Cold water heat exchange tube; 89. U-shaped tube; 810. Second overflow port; 811. Toothed bottom; 9. Mixing tank; 10. Additive tank; 11. Vibrating sand remover; 12. Chiller; 13. Chute; 14. Pump pipe; 15. Mud pump; 16. Turbine pump; 17. Turbocharger pump; 18. Make-up water pump; 19. Make-up water unit; 20. Spiral nylon tube; 21. Baffle. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear below, they only indicate that the upper, lower, left and right directions are consistent with the accompanying drawings themselves, and do not limit the structure.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0026] Examples, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the present invention provides a drilling circulation system with a drilling fluid forced cooling device, comprising a hollow drilling tool 1, a drill pipe 2 and a power device 3 are arranged on the top of the hollow drilling tool 1, a drilling fluid circulation inlet 4 connected to the hollow drilling tool 1 is arranged on the top of the power device 3, a steel casing 5 is arranged on the top of the working surface of the hollow drilling tool 1 and the drill pipe 2, and a drilling fluid circulation outlet 6 is arranged on the steel casing 5. Among them, the steel casing 5 is installed at the top of the borehole, and the drilling fluid from bottom to top during the drilling operation can flow from the inside of the steel casing 5 to the drilling fluid circulation outlet 6, and in the cooling cycle of the system; the cooled drilling fluid enters the power device 3 from the drilling fluid circulation inlet 4 after supplementing additives and water, and is driven into the drill pipe 2 through the power device 3 until it flows to the working surface position of the drill bit.

[0027] In order to improve the cooling effect of the equipment on the drilling fluid, a silt collection pool 7, a sedimentation and slurry storage integrated tank 8, a mixing tank 9 and an additive tank 10 are provided on the circulation path between the drilling fluid circulation outlet 6 and the drilling fluid circulation inlet 4 provided by the present invention. The additive tank 10 adds additives to the mixing tank 9 through a pipeline to complete mixing with the mud. The sedimentation and slurry storage integrated tank 8 includes an open sedimentation tank body 81, a sludge discharge outlet 82 is provided at the bottom of the sedimentation tank body 81, and a sludge pump 83 is provided at the sludge discharge outlet 82. A vibrating sand remover 11 is provided above the sedimentation tank body 81, and the sand outlet end of the vibrating sand remover 11 faces the silt collection pool 7, and the slurry outlet end of the vibrating sand remover 11 faces one side of the sedimentation tank body 81. The side of the sedimentation tank body 81 is provided with slurry storage distributed around the three sides of the sedimentation tank body 81. The tank body 84, the cross-section of the slurry storage tank body 84 is U-shaped, the tops of both sides of the slurry storage tank body 84 are closed ends and the top of the side away from the vibrating sand remover 11 is an open end, the open end is connected to the sedimentation tank body 81 through the first overflow port 85, and air slits 86 and multiple reinforcing rods 87 are arranged between the two sides of the slurry storage tank body 84 and the sedimentation tank body 81, cold water heat exchange pipes 88 are arranged inside the two sides of the slurry storage tank body 84, and a chiller 12 is arranged at the supply end of the cold water heat exchange pipe 88, a second overflow port 810 is arranged on one side of the slurry storage tank body 84, and a chute 13 is arranged at the second overflow port 810, one end of the chute 13 is connected to the mixing tank 9, a pump pipe 14 is arranged on the mixing tank 9, and a mud pump 15 is arranged on the pumping path of the pump pipe 14, and the output side of the mud pump 15 is connected to the drilling fluid circulation inlet 4.

[0028] Specifically, in terms of natural cooling, the vibrating sand remover 11 can retain a large amount of large-particle sediment in the sediment collection pool 7. The sediment itself absorbs heat quickly and dissipates heat quickly, which can greatly reduce the heat load in the system. Moreover, the mud has a certain, open heat dissipation surface area in the sedimentation and slurry storage tank 8. During the sedimentation process of the mud and the circulation process with the mixing tank 9, it can complete a certain heat exchange with the natural environment, further reducing the heat load in the system and making full use of the natural cooling capacity of the environment to reduce the energy consumption of the system. At the same time, the sedimentation and slurry storage tank 8 adopts a two-tank collection method, which reduces the floor space of the sedimentation tank and the slurry storage tank. From the perspective of flow control, it is necessary to ensure that there is enough mud circulation volume in the slurry storage tank. In coordination with this, the mud circulation volume is ensured by shortening the sludge discharge cycle and increasing the mud circulation rate, and the hotbed effect of the sludge is reduced, further reducing the heat load of the system. The air slit 86 between the slurry storage tank body 84 and the sedimentation tank body 81 can increase the air flow rate at this position through the pressure effect, which is greater than the air circulation rate of the surrounding environment, thereby taking away part of the heat of the sedimentation tank body 81 and the mud, and improving the natural cooling effect of the device.

[0029] In terms of forced cooling, the integrated sedimentation and slurry storage tank 8 and the cold water heat exchange pipe 88 adopt a two-tank combination + internal on-site heat exchange method, which improves the space concentration rate of the equipment. The cold water heat exchange pipe 88 directly exchanges heat with the mud in the slurry storage tank body 84, shortening the flow path and flow time of the mud. In addition, the slurry storage cavity 844 provided by the slurry storage tank body 84 provides sufficient space for the mud cold water heat exchange pipe 88 to contact, so as to avoid blockage inside the heat exchange container.

[0030] In order to reduce the energy consumption of the forced cooling operation, the bottom of the precipitation tank body 81 and the bottom of the mixing tank 9 provided by the present invention are both toothed bottoms 811, and the toothed bottoms 811 include a plurality of bottom convexities with triangular cross-sections, and the bottom convexities extend in the length direction of the precipitation tank body 81 and the length direction of the mixing tank 9, and the toothed bottoms 811 are buried below the ground surface for heat dissipation. In this case, since both the precipitation tank body 81 and the mixing tank 9 have a large bottom area, and the toothed bottom 811 design can further increase the actual contact area between the tank body and the ground surface, the ground surface is used as a large heat exchange medium to reduce the heat load of the system, which is conducive to reducing the energy consumption of the forced cooling operation.

[0031] In order to improve the performance of forced cooling of the system, the interior of the slurry storage tank body 84 provided by the present invention is provided with a concave partition wall 843 on both sides, and the concave partition wall 843 divides the single side of the slurry storage tank body 84 into two slurry storage chambers 844. The cold water heat exchange pipe 88 is introduced from one slurry storage chamber 844 near the open end and introduced into the other slurry storage chamber 844 through the U-shaped tube arranged on the outside of the slurry storage tank body 84. Specifically, the temperature of the mud in the slurry storage chamber 844 near the open end is greater than the heat in the slurry storage chamber 844 far from the open end, then the cold water heat exchange pipe 88 first exchanges heat with the mud with a higher temperature, and then exchanges heat with the mud with a lower temperature, that is, the chambers exchange heat with the cold water heat exchange pipe 88 in turn, and the exposed installation of the U-shaped tube can also allow it to exchange heat with the environment to a certain extent, thereby improving the cooling effect of the cold water medium in the cold water heat exchange pipe 88 on the mud. In this way, on the one hand, the chamber design can ensure that the cold water heat exchange pipe 88 has sufficient and effective contact probability with the mud, reducing ineffective contact. On the other hand, the heat exchange efficiency is improved by a step-by-step heat exchange method, which is beneficial to improving the heat exchange effect of the system and improving the forced cooling efficiency of the drilling fluid by this equipment.

[0032] Furthermore, since the slurry overflowing from the sedimentation tank 81 into the slurry storage chamber 844 mostly flows in the upper half of the slurry position, from the perspective of heat exchange effect, the cold water heat exchange pipe 88 provided by the present invention is lowered from high to low and extends in a serpentine trajectory in the slurry storage chamber 844 near the open end, and the cold water heat exchange pipe 88 is raised from low to high and extends in a serpentine trajectory in the other slurry storage chamber 844. In this way, a set of cold water heat exchange pipes 88 connects the two slurry storage chambers 844 in space, which not only has a more reasonable spatial coordination, but also improves the cooling efficiency of the cold water on the slurry in the first slurry storage chamber 844 from the aspect of heat exchange, thereby improving the forced cooling efficiency of the system.

[0033] In order to improve the circulation efficiency of the mud, matching the two slurry storage chambers 844, the outer side of the slurry storage tank body 84 provided by the present invention is provided with a turbine pump 16 for connecting the two slurry storage chambers 844 on the same side. The turbine pump 16 guides the mud from the slurry storage chamber 844 near the open end to the slurry storage chamber 844 near the vibrating sand remover 11, and the second overflow port 810 is provided on the slurry storage chamber 844 near the vibrating sand remover 11. The inlet of the turbine pump 16 is at a low position and is connected to the slurry storage chamber 844 near the open end, so as to ensure that the slurry in the slurry storage chamber 844 is pumped away, and the outlet of the turbine pump 16 is raised by a long tube and then extends into the other slurry storage chamber 844, thereby realizing the reasonable transfer of the mud, which not only ensures the realization of the mud transfer function, but also realizes the reasonable coordination in space.

[0034] In order to improve the cooling efficiency of the equipment for the mud, a turbocharger pump 17 is provided on the conveying path between the mud pump 15 and the drilling fluid circulation inlet 4 provided by the present invention, a branch pipe is provided on the output side of the turbocharger pump 17, a water replenishment pump 18 is provided on the branch pipe, and a water replenishment unit 19 is provided at the supply end of the water replenishment pump 18. The turbocharger pump 17 pressurizes and accelerates the mud in a turbine-increasing manner, and completes the rapid cooling without a heat source by speeding up the fluid in the pipeline. In addition, in the case of insufficient water, the water replenishment unit 19 can be started to pump a certain amount of water from the branch pipe, which not only plays a role in speeding up, but also plays a role in batching, and also effectively ensures that the temperature of the drilling fluid before entering the system is within a reasonable range, which is conducive to improving the utilization rate of the drilling fluid.

[0035] Furthermore, a spiral nylon tube 20 is provided on the output side of the water replenishment pump 18. The spiral nylon tube 20 has a certain heat exchange area with the environment. On the basis of its role as a pipeline connection, it can perform heat exchange with the external environment in real time, and can cooperate with the vortex booster pump and the water replenishment pump 18 to increase the resistance to backflow of drilling fluid. The vortex booster pump and the water replenishment pump 18 can effectively ensure that the rate at which the mud passes through the spiral nylon tube 20 is greater than the rate of the original nylon tube, so as to improve the forced cooling efficiency of the entire system.

[0036] In order to improve the heat exchange efficiency between the drilling fluid, i.e., mud, in the slurry storage chamber 844 near the open end and the cold water heat exchange tube 88, the present invention provides a baffle 21 inside the slurry storage chamber 844. The distribution position of the baffle 21 is closer to the open end than the cold water heat exchange tube 88. The slurry storage chamber 844 can export a part of the mud while performing heat exchange on a part of the mud, thereby ensuring the effective flow of the mud within a reasonable spatial range, which is beneficial to improving the cooling effect of the equipment on the mud and the utilization of the cold water heat exchange capacity.

[0037] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A drilling circulation system with a drilling fluid forced cooling device, comprising a hollow drilling tool, a drill pipe and a power device are arranged on the top of the hollow drilling tool, a drilling fluid circulation inlet connected to the hollow drilling tool is arranged on the top of the power device, a steel casing is arranged on the top of the working surface of the hollow drilling tool and the drill pipe, and a drilling fluid circulation outlet is arranged on the steel casing, characterized in that: A sediment collection tank, a sedimentation and slurry storage integrated tank, a mixing tank and an additive tank are arranged on the circulation path between the drilling fluid circulation outlet and the drilling fluid circulation inlet. The sedimentation and slurry storage integrated tank comprises an open sedimentation tank body, a sludge discharge outlet is arranged at the bottom of the sedimentation tank body, a sludge pump is arranged at the sludge discharge outlet, a vibrating sand remover is arranged above the sedimentation tank body, the sand outlet end of the vibrating sand remover faces the sedimentation collection tank, the slurry outlet end of the vibrating sand remover faces one side of the sedimentation tank body, a slurry storage tank body distributed around three sides of the sedimentation tank body is arranged on the side of the sedimentation tank body, the cross section of the slurry storage tank body is U-shaped, and the slurry storage tank body is The tops of both sides of the tank body are closed ends, and the top of the side away from the vibrating sand remover is an open end, the open end is connected to the sedimentation tank body through a first overflow port, air slits and a plurality of reinforcing rods are arranged between the two sides of the slurry storage tank body and the sedimentation tank body, cold water heat exchange pipes are arranged inside the two sides of the slurry storage tank body, a chiller is arranged at the supply end of the cold water heat exchange pipe, a second overflow port is arranged on one side of the slurry storage tank body, a chute is arranged at the second overflow port, one end of the chute is connected to a mixing tank, a pump pipe is arranged on the mixing tank, a mud pump is arranged on the pumping path of the pump pipe, and the output side of the mud pump is connected to the drilling fluid circulation inlet; The bottom of the precipitation tank body and the bottom of the mixing tank are both toothed bottoms, the toothed bottoms include a plurality of bottom convexities with triangular cross-sections, the bottom convexities extend in the length direction of the precipitation tank body and the length direction of the mixing tank, and the toothed bottoms are buried below the ground surface for heat dissipation; Both sides of the slurry storage tank are provided with concave partition walls, which divide one side of the slurry storage tank into two slurry storage chambers. The cold water heat exchange pipe is introduced from one slurry storage chamber close to the open end and introduced into the other slurry storage chamber through a U-shaped pipe arranged outside the slurry storage tank; The cold water heat exchange pipe is lowered from a high position in one slurry storage chamber and extends in a serpentine trajectory, and the cold water heat exchange pipe is raised from a low position in another slurry storage chamber and extends in a serpentine trajectory.

2. A drilling circulation system with a drilling fluid forced cooling device according to claim 1, characterized in that: A turbine pump for connecting the two slurry storage chambers on the same side is arranged on the outside of the slurry storage tank body. The turbine pump guides the slurry from the slurry storage chamber near the open end into the slurry storage chamber near the vibrating sand remover. The second overflow port is arranged on the slurry storage chamber near the vibrating sand remover.

3. A drilling circulation system with a drilling fluid forced cooling device according to claim 1 or 2, characterized in that: A turbocharger pump is provided on the conveying path between the mud pump and the drilling fluid circulation inlet, a branch pipe is provided on the output side of the turbocharger pump, a water replenishment pump is provided on the branch pipe, and a water replenishment unit is provided at the supply end of the water replenishment pump.

4. A drilling circulation system with a drilling fluid forced cooling device according to claim 3, characterized in that: A spiral nylon tube is arranged on the output side of the water replenishment pump.

5. The drilling circulation system with a drilling fluid forced cooling device according to claim 1, characterized in that: The slurry storage tank body is provided with a baffle plate inside the slurry storage cavity near the open end thereof, and the distribution position of the baffle plate is closer to the open end than the cold water heat exchange pipe.

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