A constant temperature stirring device for fracturing cleanup additive

Abstract

This utility model belongs to the field of fracturing agent mixing technology, specifically a constant-temperature mixing device for fracturing agents. Addressing the problems of insufficient mixing uniformity and limited temperature control efficiency in the background technology, the following solution is proposed: A mixing tank is included, with a stirring motor located at the center of the outer wall of the top of the tank. The output shaft of the stirring motor is fixedly connected to a rotating rod via a coupling, and a connecting column is welded to the bottom of the rotating rod. This utility model incorporates a hollow heating tube with spiral fins. The spiral fins simultaneously cut the material during mixing, enhancing mixing uniformity and creating three-dimensional turbulence, thus improving mixing uniformity. The hollow stirring shaft embeds the hollow heating tube, and the spiral fins increase the heat exchange area, enabling direct contact heating of the material and improving thermal efficiency. Furthermore, the heating jacket and the guide baffle cooperate to form a spiral fluid channel, ensuring uniform distribution of the heat medium and preventing localized overheating or undercooling of the tank.

Description

Technical Field

[0001] This utility model relates to the field of fracturing agent stirring technology, and in particular to a constant temperature stirring device for fracturing agent. Background Technology

[0002] Fracturing is a key technology in oil and gas extraction, which involves injecting high-pressure fluids into underground rock formations to create fractures and enhance oil and gas flowability. As an important component of fracturing fluid, flowback aids must effectively reduce fluid surface tension during the flowback phase to promote rapid flowback and prevent formation damage. The performance of flowback aids directly depends on their mixing uniformity and temperature stability. Traditional mixing processes often use ambient temperature mixing, but the chemical components in flowback aids (such as surfactants and stabilizers) are temperature-sensitive. Temperature fluctuations can easily lead to component stratification and reduced activity, affecting fracturing efficiency. Therefore, constant-temperature mixing devices are crucial equipment for improving the performance of flowback aids.

[0003] A search revealed a patent (application number: 202320650769.2) disclosing a "constant temperature stirring device for fracturing aid." This device utilizes a rotating serpentine constant temperature tube. The inclined tube itself forms conical surfaces at its upper and lower ends as it rotates, allowing for thorough and effective stirring of the aid material. Combined with a rotating stirring block, this improves the mixing effect. Furthermore, this invention features a simple structure, convenient maintenance, and low production costs. However, the following problems exist during its use:

[0004] The uniformity of mixing needs to be improved: the mixing block is fixed at the top and bottom of the serpentine tube, which may lead to dead zones in mixing due to the single rotation path, affecting the uniformity of raw materials.

[0005] Limited temperature control efficiency: The serpentine thermostatic tube only achieves heat exchange through external circulating water, without combining an internal temperature feedback adjustment mechanism, resulting in insufficient temperature control accuracy. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a constant-temperature stirring device for fracturing aids, which overcomes the deficiencies of existing technologies and effectively solves the problems of insufficient stirring uniformity and limited temperature control efficiency.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A constant-temperature stirring device for fracturing aid includes a stirring tank. A stirring motor is installed at the center of the outer wall of the top of the stirring tank, and a rotating rod is fixedly connected to the output shaft of the stirring motor via a coupling. A connecting column is welded to the bottom of the rotating rod, and hollow stirring shafts are welded to the outer walls of both ends of the connecting column. A hollow heating tube is welded to the outer wall of the hollow stirring shaft, and spiral fins are installed on the outer wall of the hollow heating tube. A heating jacket is welded to the outer wall of the stirring tank, and a flow guide baffle is welded between the heating jacket and the stirring tank.

[0009] Preferably, a temperature sensor is installed inside one side of the mixing tank, and the temperature sensor is installed through the inner wall of the heating jacket. A temperature controller with an electric heating rod is fixedly connected to the outer wall of one side of the heating jacket by screws.

[0010] Preferably, a water inlet pipe is welded to the top of one side of the outer wall of the heating jacket, and a drain pipe is welded to the bottom of one side of the outer wall of the heating jacket.

[0011] Preferably, a constant temperature medium input pipe is fixedly connected to one side of the inner wall of the vent frame, and a rotary joint is rotatably connected to the bottom outer wall of the hollow stirring shaft, and a constant temperature medium output pipe is fixedly connected to one side of the outer wall of the rotary joint.

[0012] Preferably, a feed pipe is installed on the top of one side of the outer wall of the mixing tank, and a discharge pipe is installed on the bottom outer wall of the mixing tank, with a solenoid valve installed on the outer wall of the discharge pipe.

[0013] Preferably, a motor mount is welded to the top outer wall of the mixing tank, and the mixing motor is fixedly connected to the top outer wall of the motor mount by screws.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. The constant temperature stirring device for fracturing aid in this design uses a hollow heating tube in conjunction with spiral fins. The spiral fins cut the material simultaneously during the stirring process, enhancing the mixing uniformity and forming three-dimensional turbulence, thus improving the mixing uniformity.

[0016] 2. The constant temperature stirring device for fracturing aid in this design has a hollow stirring shaft with a hollow heating tube embedded inside. The spiral fins increase the heat exchange area, enabling direct contact heating of the material and improving thermal efficiency. Furthermore, the heating jacket and the flow guide baffle work together to form a spiral fluid channel, ensuring uniform distribution of the heat medium and preventing local overheating or undercooling of the tank. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a constant-temperature stirring device for fracturing aid proposed in this utility model.

[0018] Figure 2This is a schematic diagram of the internal structure of the heating jacket of a constant-temperature stirring device for fracturing aid proposed in this utility model.

[0019] Figure 3 This is a schematic diagram of the internal structure of the mixing tank of a constant-temperature mixing device for fracturing aid proposed in this utility model.

[0020] Figure 4 This is a schematic diagram of the connection structure between the rotating rod and the hollow stirring shaft of a constant-temperature stirring device for fracturing aid proposed in this utility model.

[0021] In the diagram: 1. Mixing tank; 2. Mixing motor; 3. Rotating rod; 4. Connecting column; 5. Hollow mixing shaft; 6. Ventilation frame; 7. Hollow heating tube; 8. Spiral fins; 9. Heating jacket; 10. Flow guide baffle; 11. Temperature sensor; 12. Thermostat; 13. Water inlet pipe; 14. Drain pipe; 15. Thermostatic medium input pipe; 16. Rotary joint; 17. Thermostatic medium output pipe; 18. Discharge pipe; 19. Solenoid valve; 20. Motor base. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Example 1, refer to Figures 1-4 A constant-temperature stirring device for fracturing aid includes a stirring tank 1. A stirring motor 2 is installed at the center of the outer wall of the top of the stirring tank 1, and a rotating rod 3 is fixedly connected to the output shaft of the stirring motor 2 via a coupling. A connecting column 4 is welded to the bottom of the rotating rod 3, and hollow stirring shafts 5 are welded to the outer walls of both ends of the connecting column 4. A hollow heating tube 7 is welded to the outer wall of the hollow stirring shaft 5, and spiral fins 8 are installed on the outer wall of the hollow heating tube 7. A heating jacket 9 is welded to the outer wall of the stirring tank 1, and a flow guide baffle 10 is welded between the heating jacket 9 and the stirring tank 1.

[0024] In this embodiment, the hollow heating tube 7 is combined with the spiral fins 8. The spiral fins 8 cut the material synchronously during the stirring process, which enhances the mixing uniformity and can form three-dimensional turbulence, thereby improving the mixing uniformity.

[0025] Hollow heating tubes 7 are welded to the outer wall of the hollow stirring shaft 5, and spiral fins 8 are distributed on the surface of the hollow heating tubes 7 to increase the heat transfer area. A heating jacket 9 is welded to the outer wall of the stirring tank 1, and a flow guide baffle 10 is set between the jacket and the tank body to form a spiral flow channel to ensure uniform flow of the heat medium.

[0026] Example 2, refer to Figure 1A constant-temperature stirring device for fracturing aid is disclosed. A temperature sensor 11 is installed inside one side of the stirring tank 1, and the temperature sensor 11 is embedded through the inner wall of a heating jacket 9. A temperature controller 12 with an electric heating rod is fixedly connected to the outer wall of one side of the heating jacket 9 by screws. A water inlet pipe 13 is welded to the top of one side of the outer wall of the heating jacket 9, and a drain pipe 14 is welded to the bottom of one side of the outer wall of the heating jacket 9.

[0027] In this embodiment, the hollow stirring shaft 5 is embedded with a hollow heating tube 7, and the spiral fins 8 increase the heat exchange area, enabling direct contact heating of materials and improving thermal efficiency. Furthermore, the heating jacket 9 and the flow guide baffle 10 cooperate to form a spiral fluid channel, which ensures uniform distribution of the heat medium and avoids local overheating or overcooling of the tank.

[0028] Temperature sensor 11 penetrates the inner wall of heating jacket 9, collecting real-time temperature data inside the tank and transmitting it to thermostat 12. Thermostat 12 has a built-in electric heating rod that automatically adjusts its power according to the set temperature. Water inlet pipe 13 and drain pipe 14 are located at the top and bottom of heating jacket 9, respectively, using circulating water or heat transfer oil as the heat medium to achieve rapid heating and waste heat recovery.

[0029] Reference Figure 1 A constant temperature medium input pipe 15 is fixedly connected to one side of the inner wall of the ventilation frame 6, and a rotary joint 16 is rotatably connected to the bottom outer wall of the hollow stirring shaft 5. A constant temperature medium output pipe 17 is fixedly connected to one side of the outer wall of the rotary joint 16.

[0030] The thermostatic medium inlet pipe 15 is connected to the vent frame 6 to deliver the hot medium into the hollow stirring shaft 5. The rotary joint 16 ensures that the medium is continuously input when the hollow stirring shaft 5 rotates. After heating, the medium flows back to the external circulation system through the thermostatic medium outlet pipe 17, forming a closed-loop temperature control.

[0031] Reference Figure 1 A feed pipe is installed on the top of one side of the outer wall of the mixing tank 1, and a discharge pipe 18 is installed on the bottom outer wall of the mixing tank 1. A solenoid valve 19 is installed on the outer wall of the discharge pipe 18.

[0032] The raw material for the discharge aid can be injected into the tank by gravity or pumping. A solenoid valve 19 is installed at the bottom of the discharge pipe 18. After mixing is completed, it can be opened with one button by the controller to avoid human operation error.

[0033] Reference Figure 3 The mixing tank 1 has a motor base 20 welded to the top outer wall, and the mixing motor 2 is fixedly connected to the top outer wall of the motor base 20 by screws.

[0034] Working principle:

[0035] Start-up phase: Inject the auxiliary material through the feed pipe, start the stirring motor 2, and drive the rotating rod 3 to rotate the hollow stirring shaft 5.

[0036] Heating and stirring are synchronized: The thermostat 12 activates the electric heating rod, and the heating medium enters the heating jacket 9 through the water inlet pipe 13. Under the guidance of the flow guide baffle 10, it flows spirally and heats the tank wall evenly. At the same time, the constant temperature medium input pipe 15 pumps the high temperature medium into the hollow stirring shaft 5, and directly heats the material through the hollow heating pipe 7 and the spiral fins 8.

[0037] Temperature control: Temperature sensor 11 monitors the temperature inside the tank in real time and feeds it back to temperature controller 12 to dynamically adjust the power of electric heating rod to ensure constant temperature conditions.

[0038] Mixing and Discharging: When the hollow mixing shaft 5 rotates, the spiral fins 8 shear the material to achieve efficient mixing; after mixing is completed, the solenoid valve 19 opens and the discharge aid is discharged through the discharge pipe 18.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A constant-temperature stirring device for fracturing aid, comprising a stirring tank (1) and a venting frame (6), characterized in that, A stirring motor (2) is provided at the center of the outer wall of the top of the stirring tank (1), and the output shaft of the stirring motor (2) is fixedly connected to a rotating rod (3) through a coupling. A connecting column (4) is welded to the bottom of the rotating rod (3), and a hollow stirring shaft (5) is welded to the outer wall of both ends of the connecting column (4). A hollow heating tube (7) is welded to the outer wall of the hollow stirring shaft (5), and a spiral fin (8) is installed on the outer wall of the hollow heating tube (7). A heating jacket (9) is welded to the outer wall of the stirring tank (1), and a flow guide baffle (10) is welded between the heating jacket (9) and the stirring tank (1).

2. The constant-temperature stirring device for fracturing aid as described in claim 1, characterized in that, A temperature sensor (11) is installed inside one side of the mixing tank (1), and the temperature sensor (11) is installed through the inner wall of the heating jacket (9). A temperature controller (12) with an electric heating rod is fixedly connected to the outer wall of one side of the heating jacket (9) by screws.

3. The constant-temperature stirring device for fracturing aid according to claim 1, characterized in that, A water inlet pipe (13) is welded to the top of one side of the outer wall of the heating jacket (9), and a drain pipe (14) is welded to the bottom of one side of the outer wall of the heating jacket (9).

4. The constant-temperature stirring device for fracturing aid according to claim 1, characterized in that, A constant temperature medium input pipe (15) is fixedly connected to the inner wall of one side of the ventilation frame (6), and a rotary joint (16) is rotatably connected to the outer wall of the bottom of the hollow stirring shaft (5), and a constant temperature medium output pipe (17) is fixedly connected to the outer wall of one side of the rotary joint (16).

5. The constant-temperature stirring device for fracturing aid according to claim 1, characterized in that, A feed pipe is installed on the top of one side of the outer wall of the mixing tank (1), and a discharge pipe (18) is installed on the bottom outer wall of the mixing tank (1). A solenoid valve (19) is installed on the outer wall of the discharge pipe (18).

6. The constant-temperature stirring device for fracturing aid according to claim 1, characterized in that, The mixing tank (1) has a motor base (20) welded to the top outer wall, and the mixing motor (2) is fixedly connected to the top outer wall of the motor base (20) by screws.

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