Liquid cooling fracturing system

Abstract

The utility model provides a liquid-cooled fracturing system (1), which is characterized by comprising a fracturing device (2) and a liquid-cooled fracturing device (3), the power device (3) is connected with the fracturing device (2) through a transmission device (4) and is configured to provide power for the fracturing device (2); a dedicated cooling medium storage device (7) configured to store a dedicated cooling medium for cooling the power device (3); and the first heat exchange device (8) exchanges heat with the special cooling medium for cooling the power device (3) by using a cooling liquid so as to cool the special cooling medium.

Description

Technical Field

[0001] The utility model relates to a fracturing system, in particular to a liquid-cooled fracturing system which utilizes a coolant for cooling. Background Art

[0002] In the field of oil and gas extraction, fracturing refers to a technology that uses high-pressure fracturing fluid to form cracks in the oil and gas layers during the oil or gas extraction process. Fracturing can form cracks in the oil and gas layers, thereby improving the flow environment of oil or natural gas underground and increasing the output of oil wells. Therefore, fracturing is the main way to increase production in oil and gas field extraction. Equipment that can perform fracturing operations is called fracturing equipment. In particular, the pumping process of unconventional oil and gas resources requires fracturing equipment.

[0003] In oil and gas extraction, with the increase in stratum depth and pressure, the scale of fracturing construction continues to increase, and the power requirements for single-unit fracturing equipment are getting higher and higher. The high temperature in summer will affect the efficiency of the heat dissipation system of the fracturing equipment. Once a high temperature alarm occurs, it will affect normal operation, causing the equipment to reduce power to avoid overheating. On the other hand, the heat exchanger of traditional fracturing equipment uses liquid and air or air and air for heat exchange, which has low heat exchange efficiency and usually requires large-sized fans or dedicated blowers. The hot air affects the surrounding environment, and the fans and blowers increase noise.

[0004] For electric-driven fracturing equipment, fan heat dissipation will easily lead to the accumulation of dust and particulate matter inside the motor, which will have some adverse effects on the motor life and may lead to an increase in the failure rate.

[0005] The motor in Chinese utility model patent CN 216110670 U is a water-cooled motor, but it does not get rid of the use of a fan. It uses liquid to transfer the heat of the motor to a heat exchanger, and the heat exchanger transfers the heat of the liquid to the air, thereby achieving heat exchange. It still has problems of noise and low heat exchange efficiency.

[0006] Especially in mines, offshore platforms and fracturing and stimulation ship cabins, due to the limited space, low ventilation and more obvious noise impact in these areas, traditional heat exchange methods cannot meet the heat dissipation needs of the equipment. Summary of the invention

[0007] The utility model is completed in order to solve the problems of low heat dissipation efficiency and noise in the above-mentioned prior art fracturing equipment.

[0008] The liquid-cooled fracturing system of the utility model comprises: a fracturing device; a power device, which is connected to the fracturing device through a transmission device and is configured to provide power to the fracturing device; a special cooling medium storage device, which is configured to store a special cooling medium for cooling the power device; and a first heat exchange device, which uses a coolant to perform heat exchange with the special cooling medium after cooling the power device to cool the special cooling medium.

[0009] Furthermore, the liquid-cooled fracturing system also includes: a lubrication system, the lubrication system including a lubricating medium storage device, the lubricating medium storage device being configured to store a lubricating medium for lubricating the fracturing device; and a second heat exchange device, the second heat exchange device using the coolant to perform heat exchange with the lubricating medium after lubricating the fracturing device to cool the lubricating medium.

[0010] Furthermore, the liquid-cooled fracturing system also includes: a first pumping device, which is configured to circulate the dedicated cooling medium between the dedicated cooling medium storage device, the power device and the first heat exchange device; and a second pumping device, which is configured to circulate the lubricating medium between the lubricating medium storage device, the second heat exchange device and the fracturing device.

[0011] Furthermore, the liquid-cooled fracturing system also includes: a cooling liquid source, which is used to provide the cooling liquid; and at least one third pumping device, which is configured to allow the cooling liquid to flow from the cooling liquid source into the first heat exchange device and / or the second heat exchange device to exchange heat with the dedicated cooling medium and / or the lubricating medium at the first heat exchange device and / or the second heat exchange device, and to return the cooling liquid to the cooling liquid source after the heat exchange.

[0012] Furthermore, the liquid-cooled fracturing system also includes: a first flow pipeline, through which the dedicated cooling medium circulates between the dedicated cooling medium storage device, the power device and the first heat exchange device; a second flow pipeline, through which the lubricating medium circulates between the lubricating medium storage device, the second heat exchange device and the fracturing device; and a third flow pipeline, through which the coolant flows from the coolant source into the first and second heat exchange devices and returns to the coolant source after heat exchange.

[0013] Furthermore, the coolant is a liquid with heat exchange capability.

[0014] Furthermore, the coolant source is a natural or artificial container storing the coolant, wherein the amount of the coolant in the coolant source is much greater than the amount of the coolant required for cooling the dedicated cooling medium and the lubricating medium.

[0015] Furthermore, a filtering device is provided on the outlet pipe of the lubricating medium storage device to filter out solid impurities present in the lubricating medium.

[0016] Furthermore, a flow regulating valve is provided on the coolant inlet pipe or the coolant outlet pipe of the first and second heat exchange devices to regulate the flow of the coolant flowing through the first and second heat exchange devices.

[0017] Furthermore, a pressure sensor is provided on the outlet pipes of the first pumping device and the second pumping device to measure the pressure in the pipes, and a safety valve is provided on the outlet pipes of the first pumping device and the second pumping device, and the safety valve is used to adjust the pressure in the pipe based on the measurement results of the pressure sensor.

[0018] Furthermore, the liquid-cooled fracturing system also includes a temperature sensor, which is respectively arranged on the inlet pipe or the outlet pipe of the first pumping device, the second pumping device and the third pumping device to measure the temperature of the liquid flowing in the pipe.

[0019] Furthermore, a pressure sensor is provided on the outlet pipe of the third pumping device to measure the pressure in the pipe.

[0020] Furthermore, a flow meter is provided on the outlet pipe of the third pumping device to measure the flow rate of the liquid flowing in the pipe.

[0021] Furthermore, the liquid-cooled fracturing system also includes a control system, which can automatically control the flow rate of each pumping device according to the temperature measured by the temperature sensor; and / or the control system can automatically control the third pumping device so that the pressure measured by the pressure sensor remains constant; and / or the control system can automatically control the third pumping device so that the flow rate measured by the flow meter remains constant.

[0022] Furthermore, a thermostat is arranged on the outlet pipe of the second pumping device.

[0023] Furthermore, the liquid-cooled fracturing system includes a third pumping device, which is configured to correspond to a liquid-cooled fracturing equipment consisting of the fracturing device, the power device, the dedicated cooling medium storage device, the lubricating medium storage device, the first and second heat exchange devices, the first pumping device and the second pumping device.

[0024] Furthermore, the liquid-cooled fracturing system includes a third pumping device, which is configured to correspond to a plurality of liquid-cooled fracturing equipment respectively consisting of the fracturing device, the power device, the dedicated cooling medium storage device, the lubricating medium storage device, the first and second heat exchange devices, the first pumping device and the second pumping device.

[0025] Furthermore, the at least one third pumping device is configured as two third pumping devices, and one of the third pumping devices is configured to provide cooling for the lubrication systems of multiple fracturing devices of multiple liquid-cooled fracturing devices, while the other third pumping device is configured to provide cooling for multiple power devices of multiple liquid-cooled fracturing devices, wherein the parameters of each of the third pumping devices can be set separately according to the type of components to be cooled.

[0026] Furthermore, the liquid-cooled fracturing equipment consisting of the fracturing device, the power device, the dedicated cooling medium storage device, the lubricating medium storage device, the first pumping device and the second pumping device are integrated together.

[0027] Furthermore, the liquid-cooled fracturing equipment is integrated with the heat exchange device, or the liquid-cooled fracturing equipment is integrated with the heat exchange device and the third pumping device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram showing a liquid-cooled fracturing system according to Example 1 of the utility model;

[0029] Figure 2 is a schematic diagram showing a liquid-cooled fracturing system according to Example 2 of the utility model;

[0030] Figure 3 is a schematic diagram showing a liquid-cooled fracturing system according to Example 3 of the utility model;

[0031] Figure 4 is a schematic diagram showing a liquid-cooled fracturing system according to Example 4 of the utility model;

[0032] Figure 5 is a schematic diagram showing a liquid-cooled fracturing system according to Example 5 of the utility model;

[0033] Figure 6 is a schematic diagram showing a liquid-cooled fracturing system according to Example 6 of the utility model;

[0034] Figure 7 is a schematic diagram showing a liquid-cooled fracturing system according to Example 7 of the present utility model;

[0035] Figure 8 is a schematic diagram showing a shell and tube heat exchanger. DETAILED DESCRIPTION

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] Example 1

[0038] Figure 1 Schematic diagram of a liquid-cooled fracturing system according to Example 1 of the present invention. Figure 1 The liquid-cooled fracturing system 1 of Example 1 includes a fracturing device 2; a power device 3, which is connected to the fracturing device 2 through a transmission device 4 and is configured to provide power to the fracturing device 2; a dedicated cooling medium storage device 7, which is configured to store a dedicated cooling medium for cooling the power device 3; and a first heat exchange device 8, which uses a coolant to perform heat exchange with the dedicated cooling medium after cooling the power device 3 to cool the dedicated cooling medium.

[0039] It should be noted that the fracturing device 2 can be a plunger pump; the power device 3 can be a motor; and the transmission device 4 can be a coupling. The special cooling medium can be a motor cooling medium, such as water, deionized water, ethylene glycol aqueous solution, oil, etc.; the special cooling medium storage device 7 can be a motor cooling medium box; the first heat exchange device 8 can be a heat exchanger, such as a plate heat exchanger, a shell and tube heat exchanger, etc.; the coolant can be a liquid with heat exchange capacity, such as water, ethylene glycol solution, seawater, etc. In this embodiment 1, the fracturing device 2 can be used for fracturing operations. The power device 3 is connected to the fracturing device 2 through the transmission device 4, such as a transmission shaft, so as to provide power for the fracturing device 2. The power device 3, such as a motor, will continuously generate heat during operation. In order to avoid affecting the normal operation of the power device 3 due to the generated heat, it is necessary to use the room temperature or cold special cooling medium stored in the special cooling medium storage device 7 to cool the power device 3 to ensure the normal operation of the power device 3. Therefore, the room temperature or cold special cooling medium stored in the special cooling medium storage device 7 needs to enter the power device 3 to exchange heat with the power device 3. After the heat exchange, the hot special cooling medium will enter the first heat exchange device 8, exchange heat with the coolant therein and become a low-temperature special cooling medium again, and then return to the special cooling medium storage device 7 for recycling. It can be seen that in Example 1, the power device 3 is cooled by heat exchange between the special cooling medium and the coolant in the first heat exchange device 8, that is, the power device 3 is cooled by heat exchange between liquids. Compared with the prior art of cooling by heat exchange between liquid and air, the heat exchange efficiency of this embodiment 1 is higher.

[0040] In addition, the liquid-cooled fracturing system 1 of Example 1 may also include a lubrication system, which includes a lubricating medium storage device 5, wherein the lubricating medium storage device 5 is configured to store a lubricating medium for lubricating the fracturing device 2; and a second heat exchange device 9, wherein the second heat exchange device 9 uses the coolant to perform heat exchange with the lubricating medium after lubricating the fracturing device 2 to cool the lubricating medium.

[0041] It should be noted that the lubricating medium can be a plunger pump lubricating oil, such as gear oil, engine oil, etc.; the lubricating medium storage device 5 can be a lubricating oil tank; the second heat exchange device 9, like the first heat exchange device 8, can be a heat exchanger, such as a plate heat exchanger, a shell and tube heat exchanger, etc. In this embodiment 1, the lubricating medium can enter the fracturing device 2 to provide lubrication for the fracturing device 2. The fracturing device 2 generates heat during operation, causing its own temperature to rise, and the lubricating medium entering the fracturing device 2 will naturally rise due to the temperature increase of the fracturing device 2. In this case, the high-temperature lubricating medium flowing out of the fracturing device 2 can enter the second heat exchange device 9, exchange heat with the coolant therein to become a low-temperature lubricating medium, and then enter the fracturing device 2 for lubrication. As a result, the lubricating medium can take away part of the heat of the fracturing device 2 while lubricating the fracturing device 2, so as to prevent the fracturing device 2 from becoming overheated during operation and affecting its normal operation. It can be clearly seen that the fracturing device 2 is cooled by heat exchange between the lubricating medium and the coolant in the second heat exchange device 9, that is, the fracturing device 2 is also cooled by heat exchange between liquids. Here, the power device 3 and the fracturing device 2 can be cooled simultaneously by heat exchange between liquids, further improving the heat exchange efficiency of the cooling fracturing system 1 of Example 1. It should be noted that the dedicated cooling medium storage device 7 and the lubricating medium storage device 5 as containers usually have breathing ports.

[0042] In addition, the liquid-cooled fracturing system 1 of Example 1 can also include a first pumping device 10, which is configured to allow the dedicated cooling medium to circulate between the dedicated cooling medium storage device 7, the power device 3 and the first heat exchange device 8; and a second pumping device 6, which is configured to allow the lubricating medium to circulate between the lubricating medium storage device 5, the second heat exchange device 9 and the fracturing device 2.

[0043] It should be noted that the first pumping device 10 may be a motor cooling medium pump, and the second pumping device 6 may be a lubricating oil pump. Under the action of the first pumping device 10 and the second pumping device 6, the circulation of the special cooling medium and the lubricating medium can be realized, thereby realizing the circulation cooling of the power device 3 and the fracturing device 2.

[0044] In addition, the liquid-cooled fracturing system 1 of Example 1 may also include a cooling liquid source, which is used to provide the cooling liquid; and at least one third pumping device 11, which is configured to allow the cooling liquid to flow from the cooling liquid source into the first heat exchange device 8 and / or the second heat exchange device 9 to exchange heat with the dedicated cooling medium and / or the lubricating medium at the first heat exchange device 8 and / or the second heat exchange device 9, and to return the cooling liquid to the cooling liquid source after heat exchange.

[0045] It should be noted that the coolant source can be a natural coolant source such as an ocean, a river, a lake, a reservoir, or a pool. The third pumping device 11 can be a coolant pump, such as a water pump. Under the action of the third pumping device 11, the coolant can circulate in the coolant source-first and / or second heat exchange device 8, 9-coolant source loop, thereby achieving effective cooling of the dedicated cooling medium and / or lubricating medium by the coolant. Figure 1 In the figure, although the third pumping device 11 is shown to be connected to both the first and second heat exchange devices 8, 9, the third pumping device 11 may be connected to only one of the first and second heat exchange devices 8, 9 to provide cooling for only one of them. Figure 1 Only one third pumping device 11 is shown in the figure, but the number of the third pumping devices 11 is not limited to one, for example, two third pumping devices 11 may be provided, so that one third pumping device 11 is connected to the first heat exchange device 8, and the other third pumping device 11 is connected to the second heat exchange device 9, so as to provide cooling for the power device 3 and the fracturing device 2 respectively. In this case, different third pumping devices 11 may be designed respectively according to different types of components to be cooled.

[0046] In addition, the liquid-cooled fracturing system 1 of Example 1 may also include a first flow pipeline (dedicated cooling medium flow pipeline), a second flow pipeline (lubricating medium flow pipeline) and a third flow pipeline (cooling liquid flow pipeline), none of which are shown in the figure. The dedicated cooling medium circulates between the dedicated cooling medium storage device 7, the power device 3 and the first heat exchange device 8 through the first flow pipeline; the lubricating medium circulates between the lubricating medium storage device 5, the second heat exchange device 9 and the fracturing device 2 through the second flow pipeline; and the cooling liquid flows from the cooling liquid source into the first and second heat exchange devices 8, 9 through the third flow pipeline and returns to the cooling liquid source after heat exchange.

[0047] It should be noted that the dedicated cooling medium in the dedicated cooling medium storage device 7 can flow from the dedicated cooling medium storage device 7 to the power device 3 through the dedicated cooling medium flow pipeline under the action of the first pumping device 10, and it becomes a hot dedicated cooling medium after cooling the power device 3. The heated dedicated cooling medium flows into the first heat exchange device 8 through the dedicated cooling medium flow pipeline, where it exchanges heat with the coolant, thereby becoming a cold dedicated cooling medium again, and returns to the dedicated cooling medium storage device 7 through the dedicated cooling medium flow pipeline, so that the power device 3 can be circulated and cooled. As described above, the first and second heat exchange devices 8 and 9 can be plate heat exchangers or shell and tube heat exchangers, etc., refer to Figure 8, which shows a schematic diagram of a shell and tube heat exchanger.

[0048] In addition, the lubricating medium used for lubrication in the lubrication system of the fracturing device 2 may increase in temperature as the fracturing device 2 works. The heated lubricating medium may flow into the lubricating medium storage device 5 through the lubricating medium flow pipeline, and then flow into the second heat exchange device 9 through the lubricating medium flow pipeline under the action of the second pumping device 6, where it exchanges heat with the coolant to become a cold lubricating medium, and then flows into the fracturing device 2 through the lubricating medium flow pipeline to lubricate the fracturing device 2, so that it can circulate in the lubricating medium flow pipeline while being cooled and lubricated by the second heat exchange device 9.

[0049] In addition, the pumping device 11 can pump the coolant in the coolant source not shown in the figure to the first and second heat exchange devices 8 and 9 through the coolant flow pipeline, so as to exchange heat with the hot lubricating medium or special cooling medium there. The coolant whose temperature is increased after the heat exchange can be returned to the coolant source not shown, so as to exchange heat with the coolant in the coolant source and cool down again. As mentioned above, the coolant (such as water) can come from the ocean, rivers, lakes, reservoirs, pools, etc. in nature. Since the amount of water used to cool the fracturing equipment is very small compared with the amount of water in the ocean, rivers, lakes, reservoirs, pools, etc., it can be easily cooled after returning to these coolant sources, and there is no need to consider the problem of special cooling. In addition, in order to improve the heat exchange efficiency, the position where the coolant enters the cooling system from the coolant source and the position where the coolant returns to the coolant source after leaving the cooling system are usually far apart, so as to avoid the situation where the coolant that has just completed the heat exchange in the heat exchange device does not have time to be fully cooled in the coolant source and circulates back to the cooling system. It should be pointed out that although Figure 1 The specific design of the dedicated cooling medium flow pipeline, lubricating medium flow pipeline and cooling liquid flow pipeline is not shown in the figure, but the flow directions of the dedicated cooling medium, lubricating medium and cooling liquid are shown, wherein the dedicated cooling medium and lubricating medium circulate along the direction of the dotted arrows, and the cooling liquid circulates along the direction of the solid arrows. In other words, the dedicated cooling medium flow pipeline, lubricating medium flow pipeline and cooling liquid flow pipeline can be designed so that each liquid can flow along the Figure 1 The circulation flow directions shown can be any direction and there is no particular limitation thereto.

[0050] It can be seen from this that the technical solution in Example 1 adopts a heat exchange device that uses a liquid (lubricating medium or special cooling medium) to exchange heat with a liquid (water), thereby achieving cooling of components (plunger pump and motor) in the fracturing equipment.

[0051] In addition, a filtering device may be provided on the lubricating medium outlet pipe of the lubricating medium storage device 5 to filter out solid impurities therein, thereby preventing damage to the second pumping device (6).

[0052] In addition, optionally, a flow regulating device may be provided on the coolant inlet pipe or the coolant outlet pipe of the first and second heat exchange devices 8 and 9, so as to adjust the coolant flow according to different heat dissipation requirements. For example, the flow regulating device may be a flow regulating valve such as a needle valve, a butterfly valve, a ball valve, a stop valve, etc., which can be manually or automatically adjusted in opening or closed.

[0053] In addition, a pressure sensor may be provided on the outlet pipes of the first pumping device 10 and the second pumping device 6 to measure the pressure in each medium flow pipeline. A safety valve, such as a relief valve, may be provided on the outlet pipes of the first pumping device 10 and the second pumping device 6. The safety valve is used to adjust the pressure in the pipe based on the pressure measured by the pressure sensor.

[0054] In addition, a temperature sensor may be provided on the inlet pipe or outlet pipe of the first pumping device 10 and the second pumping device 6, and the temperature measured by the temperature sensor may be transmitted to the control system for these pumping devices. The control system can display the temperature of the medium in real time and issue an alarm message according to the set temperature limit. For example, when the temperature of the medium is higher than a certain set value, the control system may issue an alarm message and control the increase of the flow rate of the coolant to improve the heat exchange efficiency, thereby effectively cooling the components of the fracturing equipment. In addition, a temperature sensor may also be provided on the inlet pipe or outlet pipe of the third pumping device 11, and the temperature measured by the temperature sensor may also be transmitted to the control system. The control system may determine the state of the equipment according to the inlet temperature or outlet temperature of the liquid, and appropriately adjust the flow rate of the coolant, etc. For example, when the temperature of the coolant is high, the heat exchange efficiency is low and high temperature is easily generated. In this case, the flow rate of the coolant may be appropriately increased to improve the cooling efficiency. When the temperature of the coolant is very low, it may easily cause condensation, frost, ice and other problems. In this case, the flow rate of the coolant may be appropriately reduced or closed so that the equipment can operate at a suitable temperature.

[0055] Optionally, a pressure sensor may be provided on the outlet pipe of the third pumping device 11 to measure the pressure in the pipe. In this case, the first automatic control mode can be realized: the control system can automatically control the third pumping device 11 so that the pressure measured by the pressure sensor remains constant, for example, the control system automatically adjusts the rotation speed of the pump as the third pumping device 11 to ensure constant pressure, thereby ensuring that the flow rate of the fluid flowing through each heat exchange device remains in a predetermined state. On the other hand, a flow meter may be provided on the outlet pipe of the third pumping device 11 to measure the flow rate of the liquid flowing in the pipe. In this case, the second automatic control mode can be realized: the control system can automatically control the third pumping device 11 so that the flow rate measured by the flow meter remains constant, for example, the control system automatically adjusts the rotation speed of the pump as the third pumping device 11 or automatically adjusts the gate size of the pump discharge port to ensure that the flow rate flowing through the heat exchanger remains relatively constant.

[0056] In addition, a thermostat may be optionally installed on the outlet pipe of the second pumping device 6. When the temperature of the lubricating medium is low, the lubricating medium bypasses the second heat exchange device 9 and is directly supplied to the lubrication system of the fracturing device 2 for lubrication without heat exchange with the coolant. Figure 3 On the other hand, when the temperature of the lubricating medium is high, the thermostat gradually opens, and the amount of lubricating medium entering the second heat exchange device 9 gradually increases, thereby increasing the heat exchange amount and ensuring that the temperature of the lubricating medium is below the limit.

[0057] Example 2

[0058] Figure 2 : is a schematic diagram showing the liquid-cooled fracturing system of Example 2 of the utility model. In Example 1, the coolant can come from a natural water source in nature, while in this Example 2, the coolant can be set not to come from a natural water source in nature as in Example 1, but to come from a large artificial container storing coolant, such as a water tank, a water tower, etc. Similarly, since the volume of the water tank, water tower, etc. is very large, its water storage capacity is naturally also large, so the water used to cool the components of the fracturing equipment can also be easily cooled after returning to the water tank, water tower, etc., these cooling liquid sources, and therefore, can also play the role of cooling the components of the fracturing equipment through heat exchange between liquids. Except for this point, the configuration of the liquid-cooled fracturing system of Example 2 is the same as that of the liquid-cooled fracturing system of Example 1, so it will not be repeated. In addition, it should be noted that in Figure 2 Zhongyu Figure 1 Parts with the same or similar reference numerals in the drawings represent components with the same functions.

[0059] In addition, although it is mentioned above that seawater or the like can be used as the coolant, fresh water or ethylene glycol aqueous solution is preferably used as the coolant, which can avoid problems such as seawater corrosion due to water quality problems, thereby improving the reliability of the heat exchange system of the fracturing equipment. Further, the coolant can be circulated in the cooling system of the fracturing equipment and cooled by heat exchange with a cooling medium such as seawater through an additional heat exchange device.

[0060] Example 3

[0061] Figure 3 Schematic diagram of a liquid-cooled fracturing system according to Embodiment 3 of the present invention. In Embodiments 1 and 2 above, one third pumping device 11 is configured to correspond to one fracturing device, that is, one third pumping device 11 is configured to provide cooling liquid to the first and second heat exchange devices 8 and 9 of one fracturing device to cool the components of the fracturing device. However, in Embodiment 3, one third pumping device 11 may also be configured to correspond to multiple fracturing devices, such as Figure 3 The two fracturing devices shown, that is, a third pumping device 11 is configured to provide cooling liquid to the first and second heat exchange devices 8, 8', 9, 9' of the two fracturing devices to cool the components of these fracturing devices. In this case, providing cooling liquid to two or more fracturing devices through a third pumping device 11 can improve the cooling efficiency, simplify the structure of the cooling system, and reduce costs. Except for this point, the configuration of the liquid-cooled fracturing system of Example 3 is the same as that of the liquid-cooled fracturing system of Example 1, so it will not be repeated. In addition, it should be noted that in Figure 3 Zhongyu Figure 1 Parts with the same or similar reference numerals in the drawings represent parts with the same functions. In addition, it should be noted that the cooling liquid source in Example 3 can also be a large cooling liquid container such as a water tank, a water tower, etc. as in Example 2.

[0062] Example 4

[0063] Figure 4 Schematic diagram of a liquid-cooled fracturing system according to Embodiment 4 of the present invention. Figure 3In the embodiment 4, one third pumping device 11 is configured to correspond to two fracturing devices to cool the components of these fracturing devices. However, in the present embodiment 4, two third pumping devices 11 and 11' may also be configured, wherein one third pumping device 11' is configured to provide cooling for the power devices 3 and 3' of the multiple fracturing devices, that is, one third pumping device 11' is configured to provide cooling liquid for the first heat exchange devices 8 and 8' of the multiple fracturing devices, and another third pumping device 11 is configured to provide cooling for the lubrication systems of the pressure devices 2 and 2' of the multiple fracturing devices, that is, another third pumping device 11 is configured to provide cooling liquid for the second heat exchange devices 9 and 9' of the multiple fracturing devices to cool the power devices and lubrication systems of these fracturing devices. In this embodiment 4, discharge collecting pipes 17, 17" and 17' and suction collecting pipes 16 and 16' may be provided, wherein the coolant outlets of the first and second heat exchange devices 8, 8', 9, 9' may be connected to the discharge collecting pipe 17 to supply the coolant after heat exchange to the discharge collecting pipe 17 and return it to the coolant source through the discharge collecting pipe 17, the discharge outlets of the third pumping devices 11 and 11' are respectively connected to the discharge collecting pipes 17" and 17' for the purpose of regulating the coolant flow rate entering the first and second heat exchange devices 8, 8', 9, 9' and overflowing, and the suction collecting pipes 16 and 16' may be connected between the coolant source and the third pumping devices 11 and 11' to pump the coolant in the coolant source to each heat exchange device through the suction collecting pipes 16 and 16'. It should be pointed out that in Figure 4In the figure, although the suction collecting pipes 16 and 16' appear to be two pipes arranged separately, this is only schematic and for the convenience of drawing. In fact, the suction collecting pipes 16 and 16' are the same suction collecting pipe connected between the coolant source and the third pumping devices 11 and 11', but the connection positions are different; similarly, the discharge collecting pipes 17, 17" and 17' are also the same discharge collecting pipe, but the connection positions are different. Since the lubrication systems of the same type of components, such as the power devices 3 and 3' or the fracturing devices 2 and 2', usually have similar heat dissipation requirements, by making one third pumping device 11 provide cooling for one type of component, the other third pumping device 11 can be used to cool the components of the same type. The third pumping device 11' provides cooling for another type of component, and the flow rate of each third pumping device 11, 11' can be accurately controlled, so as to achieve the purpose of effectively controlling the heat exchange efficiency of various types of components respectively. In this case, different parameters, such as power, etc., can be set for each third pumping device 11, 11' according to the different types of components that actually need to be cooled, so as to achieve the optimal design of the third pumping device 11, 11' and optimize the cost-effectiveness of the entire cooling system. Except for this point, the configuration of the liquid-cooled fracturing system of Example 4 is the same as that of the liquid-cooled fracturing system of Example 3, so it will not be repeated. In addition, it should be noted that in Figure 4 Zhongyu Figure 3 Parts with the same or similar reference numerals in the drawings represent components with the same functions.

[0064] Example 5

[0065] Figure 5 Schematic diagram of a liquid-cooled fracturing system according to Embodiment 5 of the present invention. Figure 5 As shown in the dotted box, all components of the fracturing equipment of the liquid-cooled fracturing system 1 of the utility model except the coolant source are integrated together, that is, the liquid-cooled fracturing equipment composed of the fracturing device 2, the power device 3, the lubricating medium storage device 5, the special cooling medium storage device 7, the first and second heat exchange devices 8, 9, the second pumping device 6, the first pumping device 10 and the third pumping device 11 are integrated together. In other words, the first and second heat exchange devices 8, 9 can be integrated with the various components of the fracturing equipment, and can be directly connected to the coolant source when used. In this case, since the first and second heat exchange devices 8, 9 are all integrated with the various components of the fracturing equipment, no complicated installation and debugging are required when used, that is, the installation and debugging of a single liquid-cooled fracturing equipment can be conveniently carried out, thereby simplifying the installation procedure. In addition, it should be noted that in Figure 5 Zhongyu Figure 1 Parts with the same or similar reference numerals in the drawings represent components with the same functions, and their description will not be repeated.

[0066] Example 6

[0067] Figure 6 Schematic diagram of a liquid-cooled fracturing system according to Embodiment 6 of the present invention. In Embodiment 6, unlike Embodiment 5, the fracturing equipment of this embodiment excludes the third pumping device 11, that is, it is not integrated with the third pumping device 11. Figure 6 As shown by the dotted line shown. In other words, the liquid-cooled fracturing equipment consisting of the fracturing device 2, the power device 3, the lubricating medium storage device 5, the dedicated cooling medium storage device 7, the first and second heat exchange devices 8, 9, the second pumping device 6 and the first pumping device 10 are integrated together, but the third pumping device 11 is separately arranged from the liquid-cooled fracturing equipment. In this case, the design freedom of each component of the fracturing equipment is higher, and it can be freely configured according to actual needs. When in use, just select the adapted third pumping device 11 for connection, because there is no need to involve dedicated third pumping devices 11 for fracturing equipment of various design standards, thereby saving costs.

[0068] Example 6

[0069] Figure 7 Schematic diagram of a liquid-cooled fracturing system according to Embodiment 7 of the present invention. In this embodiment, the fracturing equipment is not integrated with the first and second heat exchange devices 8, 9 and the third pumping device 11. Figure 7 In other words, the liquid-cooled fracturing equipment consisting of the fracturing device 2, the power device 3, the lubricating medium storage device 5, the dedicated cooling medium storage device 7, the second pumping device 6 and the first pumping device 10 are integrated together, but the first and second heat exchange devices 8, 9 and the third pumping device 11 are separately arranged from the liquid-cooled fracturing equipment. In other words, the heat exchange device can be placed around the fracturing equipment or concentrated in the heat exchange device installation area (i.e. not integrated with the equipment), which facilitates the integration of the on-site heat exchange system with the equipment installation site and facilitates the unified installation and management of the heat exchange system.

[0070] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. Those skilled in the art can make any modifications, replacements and improvements within the spirit and principles of the present invention, which should all be included in the scope of the present invention.

Claims

1. A liquid-cooled fracturing system (1), characterized in that: include: Fracturing device (2); A power device (3), the power device (3) being connected to the fracturing device (2) via a transmission device (4) and configured to provide power to the fracturing device (2); A dedicated cooling medium storage device (7) configured to store a dedicated cooling medium for cooling the power device (3); and A first heat exchange device (8) uses a coolant to perform heat exchange with the dedicated cooling medium after cooling the power device (3) to cool the dedicated cooling medium.

2. The liquid-cooled fracturing system (1) according to claim 1, characterized in that: Also includes: A lubrication system, the lubrication system comprising a lubrication medium storage device (5), the lubrication medium storage device (5) being configured to store a lubrication medium for lubricating the fracturing device (2); and A second heat exchange device (9) uses the cooling liquid to perform heat exchange with the lubricating medium after lubricating the fracturing device (2) to cool the lubricating medium.

3. The liquid-cooled fracturing system (1) according to claim 2, characterized in that: Also includes: a first pumping device (10) configured to circulate the dedicated cooling medium between the dedicated cooling medium storage device (7), the power device (3) and the first heat exchange device (8); and A second pumping device (6) is configured to circulate the lubricating medium between the lubricating medium storage device (5), the second heat exchange device (9) and the fracturing device (2).

4. The liquid-cooled fracturing system (1) according to claim 3, characterized in that: Also includes: A cooling liquid source, used for providing the cooling liquid; and At least one third pumping device (11) is configured to allow the coolant to flow from the coolant source into the first heat exchange device (8) and / or the second heat exchange device (9) to exchange heat with the dedicated cooling medium and / or the lubricating medium at the first heat exchange device (8) and / or the second heat exchange device (9), and to return the coolant to the coolant source after the heat exchange.

5. The liquid-cooled fracturing system (1) according to claim 4, characterized in that: Also includes: a first flow pipeline, through which the dedicated cooling medium circulates between the dedicated cooling medium storage device (7), the power device (3) and the first heat exchange device (8); a second flow pipeline, through which the lubricating medium circulates between the lubricating medium storage device (5), the second heat exchange device (9) and the fracturing device (2); and A third flow pipeline, through which the coolant flows from the coolant source into the first heat exchange device (8) and the second heat exchange device (9) and returns to the coolant source after heat exchange.

6. The liquid-cooled fracturing system (1) according to claim 1, characterized in that: The coolant is a liquid with heat exchange capability.

7. The liquid-cooled fracturing system (1) according to claim 4, characterized in that: The coolant source is a natural or artificial container storing the coolant, wherein the amount of the coolant in the coolant source is much greater than the amount of the coolant required for cooling the dedicated cooling medium and the lubricating medium.

8. The liquid-cooled fracturing system (1) according to claim 2, characterized in that: A filtering device is provided on the outlet pipe of the lubricating medium storage device (5) to filter out solid impurities present in the lubricating medium.

9. The liquid-cooled fracturing system (1) according to claim 4, characterized in that: A flow regulating device is provided on the coolant inlet pipe or the coolant outlet pipe of the first heat exchange device (8) and the second heat exchange device (9) to regulate the flow of the coolant flowing through the first heat exchange device (8) and the second heat exchange device (9).

10. The liquid-cooled fracturing system (1) according to claim 3, characterized in that: Pressure sensors are provided on the outlet pipes of the first pumping device (10) and the second pumping device (6) to measure the pressure in the pipes, and safety valves are provided on the outlet pipes of the first pumping device (10) and the second pumping device (6) to adjust the pressure in the pipes based on the measurement results of the pressure sensors.

11. The liquid-cooled fracturing system (1) according to claim 4, characterized in that: It also includes temperature sensors, which are respectively arranged on the inlet pipes or outlet pipes of the first pumping device (10), the second pumping device (6) and the third pumping device (11) to measure the temperature of the liquid flowing in the pipes.

12. The liquid-cooled fracturing system (1) according to claim 4, characterized in that: A pressure sensor is provided on the outlet pipe of the third pumping device (11) to measure the pressure in the pipe.

13. The liquid-cooled fracturing system (1) according to claim 4, characterized in that: A flow meter is arranged on the outlet pipe of the third pumping device (11) to measure the flow rate of the liquid flowing in the pipe.

14. The liquid-cooled fracturing system (1) according to claim 11, characterized in that: It also comprises a control system, which can automatically control the flow rate of the third pumping device (11) according to the temperature measured by the temperature sensor.

15. The liquid-cooled fracturing system (1) according to claim 12, characterized in that: It also comprises a control system, which can automatically control the third pumping device (11) so that the pressure measured by the pressure sensor remains constant.

16. The liquid-cooled fracturing system (1) according to claim 13, characterized in that: It also comprises a control system, which can automatically control the third pumping device (11) so that the flow rate measured by the flow meter remains constant.

17. The liquid-cooled fracturing system (1) according to claim 3, characterized in that: A thermostat is arranged on the outlet pipe of the second pumping device (6).

18. The liquid-cooled fracturing system (1) according to claim 4, characterized in that: The liquid-cooled fracturing system (1) includes a third pumping device (11), and the third pumping device (11) is configured to correspond to a liquid-cooled fracturing equipment consisting of the fracturing device (2), the power device (3), the dedicated cooling medium storage device (7), the lubricating medium storage device (5), the first heat exchange device (8) and the second heat exchange device (9), the first pumping device (10) and the second pumping device (6).

19. The liquid-cooled fracturing system (1) according to claim 4, characterized in that: The liquid-cooled fracturing system (1) comprises a third pumping device (11), and the third pumping device (11) is configured to correspond to a plurality of liquid-cooled fracturing devices respectively consisting of the fracturing device (2), the power device (3), the dedicated cooling medium storage device (7), the lubricating medium storage device (5), the first heat exchange device (8) and the second heat exchange device (9), the first pumping device (10) and the second pumping device (6).

20. The liquid-cooled fracturing system (1) according to claim 4, characterized in that: The at least one third pumping device is configured as two third pumping devices, and one of the third pumping devices is configured to provide cooling for the lubrication system of multiple fracturing devices (2) of multiple liquid-cooled fracturing equipment, while the other third pumping device is configured to provide cooling for multiple power devices (3) of multiple liquid-cooled fracturing equipment, wherein the parameters of each of the third pumping devices can be set separately according to the type of components to be cooled.

21. The liquid-cooled fracturing system (1) according to claim 4, characterized in that: The liquid-cooled fracturing equipment consisting of the fracturing device (2), the power device (3), the dedicated cooling medium storage device (7), the lubricating medium storage device (5), the first pumping device (10) and the second pumping device (6) is integrated together.

22. The liquid-cooled fracturing system (1) according to claim 21, characterized in that: The liquid-cooled fracturing equipment is integrated with the first heat exchange device (8) and the second heat exchange device (9), or the liquid-cooled fracturing equipment is integrated with the first heat exchange device (8), the second heat exchange device (9) and the third pumping device (11).

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