Fracturing equipment displacement control method and fracturing equipment

Abstract

The invention discloses a fracturing equipment displacement control method and fracturing equipment, and relates to the field of oil and gas equipment. According to the control method for the displacement of the fracturing equipment, the fracturing equipment comprises at least one fracturing pump set, and each fracturing pump set comprises a plurality of fracturing pumps; the control method comprises the steps that the actual total displacement of the fracturing pump set is obtained, and the set control displacement deviation value of the fracturing pump set is obtained according to the actual total displacement and the preset total displacement; when the group control displacement deviation value is not zero, the fracturing pump with the minimum gear and the highest health degree priority in the fracturing pump group is obtained, whether the actual single-machine displacement of the fracturing pump reaches the preset single-machine displacement or not is determined, and if yes, the fracturing pump is determined as the fracturing pump needing displacement regulation and control; the displacement of the fracturing pump needing to be regulated and controlled is distributed, and the target gear and the target rotating speed of the fracturing pump are obtained according to the distributed displacement; and the fracturing pump is regulated and controlled to the target gear and the target rotating speed. The problems that the requirement for manually adjusting the output displacement of the fracturing pump is high, and operation is inconvenient can be solved.

Description

Technical Field

[0001] The present application belongs to the technical field of oil and gas equipment, and specifically relates to a method for controlling the displacement of a fracturing device and a fracturing device. Background Art

[0002] Fracturing is an effective measure to increase production that is currently widely used in oil fields, and is also the main means of unconventional oil and gas production. With the continuous development of fracturing technology, large-scale factory-based fracturing operations in platform-based and ultra-deep wells have become very common. Factory-based fracturing usually requires more than a dozen various types of fracturing pumps to form a fracturing pump group, which works together with other supporting equipment to complete the fracturing operation process. In the current fracturing operation process, the on-site operators mainly perform fracturing operations by manually controlling the output displacement of each fracturing pump in the fracturing pump group in turn according to the total displacement required by the operation process. This requires high experience and skills of the on-site operators and cannot meet the development trend of automation, intelligence and unmanned fracturing operations in the future. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a method for controlling the displacement of a fracturing device and a fracturing device, which can solve the problems of high requirements for manual adjustment of the output displacement of a fracturing pump and inconvenient operation.

[0004] In order to solve the above technical problems, this application is implemented as follows: The embodiment of the present application provides a method for controlling the displacement of a fracturing device, wherein the fracturing device includes at least one fracturing pump group, and each of the fracturing pump groups includes a plurality of fracturing pumps; The control method comprises: Acquire the actual total displacement of the fracturing pump group, and obtain a group control displacement deviation value of the fracturing pump group according to the actual total displacement and a preset total displacement; When the group control displacement deviation value is not zero, the fracturing pump with the smallest gear and the highest health priority in the fracturing pump group is obtained, and it is determined whether the actual displacement of the single fracturing pump reaches the single preset displacement. If so, the fracturing pump is determined as the fracturing pump that needs to adjust the displacement; Allocating displacement to the fracturing pump that needs to adjust displacement, and obtaining a target gear position and a target speed of the fracturing pump according to the allocated displacement; The fracturing pump is regulated to the target gear position and the target speed.

[0005] The embodiment of the present application also provides a fracturing device, which uses the above control method to control the output displacement.

[0006] The embodiments of the present application can automatically control the displacement of multiple fracturing pumps in the fracturing equipment, without the need for manual control of the output displacement of each fracturing pump in turn, thereby improving control efficiency, reducing the labor intensity of operators, and not requiring operators to have high experience and skills, thereby realizing automated, intelligent, and unmanned control of the fracturing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 A first flow chart of a method for controlling the displacement of a fracturing device disclosed in an embodiment of the present application; Figure 2 This is a second flow chart of the method for controlling the displacement of a fracturing device disclosed in an embodiment of the present application. DETAILED DESCRIPTION

[0008] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0009] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0010] The embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0011] refer to Figure 1 and Figure 2 The embodiment of the present application discloses a method for controlling the displacement of a fracturing device, wherein the fracturing device includes at least one fracturing pump group, and each fracturing pump group may include multiple fracturing pumps. Optionally, the embodiment of the present application divides all the fracturing pumps included in the fracturing device into N groups according to the actual operation mode on site, and each group includes multiple fracturing pumps, wherein N is greater than or equal to 1.

[0012] The disclosed control method includes: The actual total displacement of the fracturing pump group is obtained, and the group control displacement deviation value of the fracturing pump group is obtained according to the actual total displacement and the preset total displacement.

[0013] When the group control displacement deviation value is not zero, obtain the fracturing pump with the smallest gear and the highest health priority in the fracturing pump group, and determine whether the actual displacement of the fracturing pump with the smallest gear and the highest health priority reaches the preset displacement of the single machine. If it reaches the preset displacement of the single machine, determine this fracturing pump as the fracturing pump that needs to adjust the displacement; Allocating displacement to a fracturing pump that needs to adjust displacement, and obtaining a target gear position and a target speed of the fracturing pump according to the allocated displacement; The fracturing pump is adjusted to a target gear position and a target speed.

[0014] Based on the above steps, the embodiment of the present application can automatically control the displacement of multiple fracturing pumps in the fracturing equipment, without the need to manually control the output displacement of each fracturing pump in turn, thereby improving control efficiency, reducing the labor intensity of operators, and not requiring operators to have high experience and skills, thereby realizing automated, intelligent, and unmanned control of the fracturing equipment.

[0015] Optionally, the actual total displacement of the fracturing pump group is obtained, including: Obtain the actual displacement of each fracturing pump in the fracturing pump group; According to the actual displacement of each fracturing pump, the actual total displacement of the fracturing pump group is obtained. It should be noted here that the actual total displacement of each fracturing pump group is the sum of the actual displacement of all fracturing pumps in the fracturing pump group. The actual displacement of a fracturing pump can be detected by setting a flow meter at the outlet of the fracturing pump.

[0016] For example, the actual displacement of each of the multiple fracturing pumps in the fracturing pump group is Q 1 , Q 2 , Q 3 …Q n , the actual total displacement of the fracturing pump group Q T The calculation formula is: Q T =Q 1 +Q 2 +Q 3 +…+Q n In addition, the preset total displacement of the fracturing pump group is set to Q S , the group control displacement deviation value of the fracturing pump group is set to ΔQ, thus, the calculation formula of the group control displacement deviation value ΔQ is: ΔQ=Q S -Q T The preset total displacement can be obtained by manually inputting settings by operators in the automatic displacement control system of the fracturing equipment, or by receiving parameters from other linkage systems. Of course, other methods are also possible and are not specifically limited here.

[0017] When the group control displacement deviation value is zero, the displacement allocation is completed, the cycle ends, and execution starts from the beginning.

[0018] Optionally, before grouping the fracturing pumps, you can first determine whether the status of the fracturing pump has been confirmed, including: determining whether the current process is a pumping process, and determining whether overpressure protection is triggered, etc.; if the status of each fracturing pump has been confirmed, and the current process is a pumping process and the overpressure protection is not triggered, then the grouping requirements are met, and multiple fracturing pumps can be grouped.

[0019] Based on the above steps, it can be ensured that the state of each fracturing pump meets the requirements before grouping, so as to facilitate the subsequent regulation of the displacement of the fracturing pump.

[0020] It should be noted here that the above-mentioned execution from the beginning can be understood as execution starting from the step of determining whether the state of the fracturing pump has been determined.

[0021] When the group control displacement deviation is not zero, the control method further includes: Determine whether the multi-stage overpressure protection has been triggered or is being triggered; If the multi-stage overpressure protection has been triggered or is being triggered, then the current cycle ends and execution starts from the step of determining whether the state of the fracturing pump has been determined; If the multi-stage overpressure protection is not triggered, the fracturing pump with the smallest gear and the highest health priority in the fracturing pump group is obtained.

[0022] Based on this step, it can be seen that when the group control displacement deviation is not zero, it indicates that there may be some problems with the actual total displacement of the fracturing pump group. However, it is also necessary to confirm whether the overpressure protection of the fracturing pump group has been triggered or is being triggered. If it has been triggered or is being triggered, it indicates that the fracturing pump group may have safety problems. At this time, in order to avoid safety problems, the displacement of the fracturing pump group will no longer be adjusted, but the problems of the fracturing pump group will be checked from the beginning to ensure that the fracturing pump group can operate normally.

[0023] When the fracturing pump unit does not trigger the multi-stage overpressure protection, it indicates that there is no safety issue and the fracturing pump unit can operate. At this time, even if the displacement fluctuates, it can be returned to an acceptable range through subsequent regulation.

[0024] Optionally, obtaining a fracturing pump with the smallest gear position and the highest health priority in the fracturing pump group includes: Eliminate the fracturing pumps that have reached the maximum displacement in the fracturing pump group; Arrange the remaining fracturing pumps in order of increasing gear position; Sort by health priority; Select the fracturing pump with the smallest gear position and the highest health priority.

[0025] It should be noted here that the health of the fracturing pump can be comprehensively considered based on factors such as the usage time, maintenance level, and operating status of the fracturing pump. Among them, the health of the fracturing pump that satisfies the conditions of shorter usage time, lower maintenance level, and better operating status is higher, indicating that the probability of abnormal displacement of this fracturing pump during operation is lower. Of course, the usage time, maintenance level, and operating status can also be sorted by importance according to demand. For example, with usage time as the main consideration, operating status as the first secondary consideration, and maintenance level as the second secondary consideration, when sorting the health of the fracturing pump, the order of considerations is usage time, operating status, and maintenance level. Of course, the health of the fracturing pump can also be sorted by other orders, which are not specifically limited here.

[0026] In addition, the fracturing pump that has reached the maximum displacement in the fracturing pump group cannot continue to increase the displacement. Therefore, the fracturing pump that has reached the maximum displacement can hardly adjust the displacement any more. This fracturing pump does not belong to the object of later displacement adjustment and needs to be eliminated. On the contrary, the fracturing pump with the smallest gear (that is, the smallest displacement) has the largest displacement adjustment space. If the group control displacement deviation is large, the actual total displacement of the entire fracturing pump group can be adjusted at the fastest speed by adjusting the displacement of the fracturing pump with the smallest gear, so that the actual total displacement of the fracturing pump group quickly approaches or even equals the preset total displacement.

[0027] Furthermore, after selecting the fracturing pump with the smallest gear position and the highest health priority, the control method further includes: Determine whether the actual displacement of the single-unit fracturing pump with the smallest gear and the highest health priority has reached the single-unit preset displacement. If the actual displacement of the single-unit fracturing pump has reached the single-unit preset displacement, it indicates that the fracturing pump is in the optimal operating state. In this case, the fracturing pump can continue to operate in this state.

[0028] If the actual displacement of the fracturing pump with the smallest gear and the highest health priority does not reach the preset displacement of the single machine, it indicates that the fracturing pump can still be adjusted in displacement so that its actual displacement is equal to the preset displacement of the single machine, so that it is in the optimal operating state.

[0029] In addition, when the actual displacement of the fracturing pump with the smallest gear and the highest health priority does not reach the preset displacement of the single machine, the current gear of the fracturing pump with the smallest gear and the highest health priority can also be recorded, and the second-ranked fracturing pump can be reselected based on the current gear and health priority.

[0030] For example, the current gear of the fracturing pump with the smallest gear and the highest health priority is gear 2. When selecting the next fracturing pump subsequently, the other fracturing pumps in the fracturing pump group can be sorted based on gear 2 and health priority in the fracturing pump group, and the second fracturing pump has the highest level.

[0031] Determine whether the second-ranked fracturing pump meets the condition that the actual displacement of the single machine reaches the preset displacement of the single machine and does not exceed the first-ranked fracturing pump by two gears; If the second-ranked fracturing pump meets the condition that the actual displacement of the single machine reaches the preset displacement of the single machine and does not exceed the first-ranked fracturing pump by two gears, the second-ranked fracturing pump is determined as the fracturing pump that needs to adjust the displacement; If the second-ranked fracturing pump does not meet the condition that the actual displacement of a single machine reaches the preset displacement of a single machine and does not exceed the first-ranked fracturing pump by two gears, the remaining fracturing pumps are determined in turn until the fracturing pump that needs to adjust the displacement is selected. If all the remaining fracturing pumps do not meet the condition that the actual displacement of a single machine reaches the preset displacement of a single machine and does not exceed the first-ranked fracturing pump by two gears, the cycle is terminated and execution begins from the step of determining whether the status of the fracturing pump has been determined.

[0032] It should be noted here that the gear position of the fracturing pump corresponds to its displacement, that is, the smaller the gear position, the smaller the displacement, and the larger the gear position, the larger the displacement. When the displacement needs to be increased, the fracturing pump with the largest gear position is first eliminated, and then the fracturing pump with the smallest gear position (that is, the smallest displacement) is selected from the remaining fracturing pumps, and the displacement of the fracturing pump can be increased first; when multiple fracturing pumps in the remaining fracturing pumps have the same gear position (the same displacement), the fracturing pump with a higher health can be selected to increase the displacement first. Among them, the health can be understood to be determined according to the status of the fracturing pump, for example, the total time the fracturing pump is used, etc.

[0033] The above two gears can be understood as the maximum gear difference between every two fracturing pumps in the fracturing pump group is two gears, because the greater the gear difference, the greater the displacement difference between the fracturing pumps in the fracturing pump group, which is not conducive to the smooth operation of the fracturing pump group.

[0034] Optionally, allocating the displacement to the fracturing pump that needs to adjust the displacement includes: Determine whether the actual displacement of a single unit will exceed the preset displacement of a single unit after the fracturing pump that needs to adjust the displacement is upgraded; If the actual displacement of a single machine does not exceed the preset displacement of a single machine, the maximum displacement of the next gear is allocated to the fracturing pump, and the allocated displacement is subtracted from the remaining displacement; If the actual displacement of a single machine exceeds the preset displacement of a single machine, only the remaining displacement will be allocated.

[0035] For example, when the fracturing pump is in the first gear, the displacement is 0.8 cubic meters, and when it is in the second gear, the displacement is 1.1 cubic meters. In the initial state, the fracturing pump is in the zero gear, and the target displacement is 1 cubic meter. Determine whether the maximum displacement of the next gear (i.e., the first gear) after the zero gear is smaller than 1 cubic meter. If it is smaller, then first set the fracturing pump to the first gear, that is, allocate 0.8 cubic meter displacement to the fracturing pump, and the remaining displacement is 0.2 cubic meter; from the first gear to the second gear, the displacement will increase by 0.3 cubic meter, but 0.2 cubic meter displacement is required, so it is necessary to control the allocation of only 0.2 cubic meter displacement to the fracturing pump, and the final displacement of the fracturing pump is 0.8+0.2=1 cubic meter.

[0036] Furthermore, allocating the displacement of the fracturing pump that needs to adjust the displacement also includes: According to the value of the allocated displacement and the displacement increase speed parameter, the waiting time between the displacement increase of each two fracturing pumps in the fracturing pump group is calculated. Based on this step, the displacement increase of the two fracturing pumps in the fracturing pump group can be made more stable. It should be noted here that the shorter the waiting time, the tighter and smoother the process of increasing the displacement between the two fracturing pumps, thereby reducing the volatility of the actual total displacement of the fracturing pump group and making the operation of the fracturing pump group more stable.

[0037] For example, to increase the displacement from 0 cubic meters to 20 cubic meters, you can use a continuous method to increase the displacement, and the speed of increasing the displacement can be the same or different, or you can use a step-by-step method to increase the displacement, and you have to wait for a period of time for each increase in displacement. Therefore, when increasing the displacement, you need to configure the parameters in advance, and the parameters include the speed of increasing the displacement. For example, the displacement increases by 0.7 cubic meters from zero gear to first gear, and the displacement increases by 0.3 cubic meters from first gear to second gear. In order to make the oblique line straighter, the waiting time when increasing one gear and then the next gear needs to be determined according to the increased displacement.

[0038] In an embodiment of the present application, after the fracturing pump receives the allocated displacement Q, it can calculate the gears and speeds required for the displacement, that is, the target gear G and the target speed S, based on the allocated displacement, and open a separate thread to be responsible for raising the fracturing pump to the target gear and target speed.

[0039] Taking the fracturing pump as a plunger pump as an example, the calculation formula is: Q=S / R i *p P = π × r 2 ×l×n / R p Among them, R iis the reduction ratio of each gear of the gearbox, r is the radius of the plunger pump, l is the stroke of the plunger pump, n is the number of plungers, R p is the pump reduction ratio.

[0040] Optionally, the control method further includes: Determine whether the set gear is equal to the target gear. If the set gear is less than the target gear, control the current fracturing pump to shift up. In addition, determine whether the set speed of the current fracturing pump is equal to the target speed. If it is less than the target speed, control the current fracturing pump to throttle up to reach the target speed.

[0041] Optionally, after allocating displacement to the fracturing pump that needs to adjust displacement, the allocated displacement is counted, and if it exceeds the displacement increase step length, the displacement increase holding time is waited to achieve step-by-step displacement increase.

[0042] Furthermore, the embodiment of the present application can also determine the construction pressure in real time. If it exceeds the multi-level overpressure protection value, the displacement will be quickly maintained or reduced according to the set parameters to achieve faster and more accurate control of the displacement.

[0043] Optionally, the fracturing equipment may include a plurality of fracturing pump groups, each of which includes a plurality of fracturing pumps.

[0044] Before obtaining the actual total displacement of the fracturing pump group, the control method further includes: A fracturing pump group having the largest displacement difference between the actual total displacement and the preset total displacement among the multiple fracturing pump groups is determined, and the fracturing pump group is determined as the fracturing pump group that needs to be lifted.

[0045] Furthermore, after determining the fracturing pump group that needs to be lifted, the control method also includes: Determine whether the suction pressure of the fracturing pump group that needs to be increased is greater than the preset suction pressure; If it is not greater than the preset suction pressure, there is a risk of emptying, and this cycle ends, and execution starts from the step of determining whether the status of the fracturing pump has been determined; If it is greater than the preset suction pressure, the step of obtaining the actual total displacement of the fracturing pump group is executed.

[0046] Optionally, before determining the fracturing pump group that needs to be lifted, the control method also includes; Determine whether the status of each fracturing pump has been confirmed, wherein determine whether the current process is a pumping process, and determine whether overpressure protection is triggered; If the status of each fracturing pump has been confirmed, the current process is a pumping process, and the overpressure protection is not triggered, the step of determining the fracturing pump group that needs to be lifted is performed.

[0047] Before executing the above control method, parameters can be configured according to the actual situation of the on-site operation, including: on-site operation mode setting, fracturing pump grouping setting, fracturing pump priority setting, maximum displacement setting of each fracturing pump, displacement increase speed control, displacement speed control, minimum suction pressure setting, whether to restore displacement after overpressure setting, maximum displacement setting of each fracturing pump group, multi-stage overpressure protection setting, etc.

[0048] After setting the above parameters, the fracturing equipment can be set to automatic mode, and the total displacement of each fracturing pump group can be input to control the displacement of the fracturing equipment through program control.

[0049] refer to Figure 1 The specific implementation process of the method for controlling the displacement of the fracturing equipment in the embodiment of the present application includes: start; Configure the configuration parameters of the fracturing equipment according to the actual situation of the on-site operation, and after the configuration parameters are completed, set the fracturing equipment to automatic mode, and enter the total displacement of each fracturing pump group in the initial state, that is, the preset total displacement; Confirm the status of each fracturing pump to ensure that the status of each fracturing pump meets the operation requirements; After confirming the status of the fracturing pumps, all the fracturing pumps are grouped to obtain a plurality of fracturing pump groups, and each fracturing pump group includes at least one fracturing pump; Calculate the actual total displacement of each fracturing pump group and compare it with the preset total displacement to obtain the fracturing pump group with the largest displacement difference, and use this fracturing pump group as the target fracturing pump group, that is, the fracturing pump group whose displacement needs to be regulated; Determine whether the suction pressure of the target fracturing pump group is greater than the preset suction pressure, that is, the preset minimum suction pressure. If the suction pressure is less than the preset suction pressure, the fracturing pump group may have a risk of running empty, and return to the step of confirming the fracturing pump state. If the suction pressure is greater than the preset suction pressure, the fracturing pump group meets the requirements of displacement control; Confirm whether the actual total displacement of the target fracturing pump group is equal to the preset total displacement, that is, whether the group control displacement deviation value of the target fracturing pump group is zero. If it is zero, the displacement allocation is completed, the cycle ends, and the process returns to the step of confirming the status of the fracturing pump. If it is not zero, confirm whether the multi-stage overpressure protection has been triggered or is being triggered; If the multi-stage overpressure protection has been triggered or is being triggered, then this cycle ends and returns to the step of confirming the status of the fracturing pump. If the multi-stage overpressure protection has not been triggered, then proceed to the next step. Eliminate the fracturing pumps that have reached the maximum displacement in the target fracturing pump group, sort the remaining fracturing pumps according to the gear position, and then sort them according to the health priority of the fracturing pumps, give priority to the fracturing pump with the smallest gear position and the highest priority, and determine whether the actual displacement of the single fracturing pump has reached the single-machine preset displacement. If it has not reached the single-machine preset displacement, record the current gear position of the fracturing pump, and reselect the second-ranked fracturing pump to continue to determine whether it meets the condition that the single-machine displacement reaches the single-machine preset displacement and does not exceed the first-ranked fracturing pump by two gears. If the condition is met, the second-ranked fracturing pump is determined as the fracturing pump that needs to adjust the displacement. If the condition is not met, end this cycle and return to the step of confirming the status of the fracturing pump; After determining the fracturing pump that needs to adjust the displacement, continue to determine whether the fracturing pump will exceed the displacement after the gear is raised, that is, the actual displacement of the single machine exceeds the preset displacement of the single machine. If it does not exceed the displacement, the fracturing pump is allocated the maximum displacement of the next gear, and the remaining displacement is subtracted from the allocated displacement. If it exceeds the displacement, only the remaining displacement is allocated. According to the value of the allocated displacement and the displacement increase speed parameter, the waiting time between the displacement increases of every two fracturing pumps in the fracturing pump group is calculated, so as to make the displacement increase more stable; After receiving the allocated displacement, the fracturing pump calculates the target gear and target speed required for the displacement; Determine whether the set gear of the fracturing pump is the target gear. If it is less than the target gear, control the fracturing pump to shift up. At the same time, determine whether the set speed of the fracturing pump is the target speed. If it is less than the target speed, control the fracturing pump to accelerate so that the set speed reaches the target speed.

[0050] Based on the above control method, the embodiment of the present application also discloses a fracturing device, and the disclosed fracturing device adopts the above control method to control the output displacement. Wherein, the fracturing device may include multiple fracturing pump groups, and each fracturing pump group may include at least one fracturing pump. Optionally, each fracturing pump group includes multiple fracturing pumps.

[0051] To summarize, the embodiments of the present application can allocate displacement to each fracturing pump according to the designed total displacement, and each fracturing pump can simulate the manual displacement increase method according to the allocated displacement and execute it automatically; the displacement can be quickly reduced through multi-stage overpressure protection to prevent excessive pressure from affecting construction; according to the amount of displacement increase, the interval time of displacement increase between every two fracturing pumps is calculated to improve the stability of displacement control and alleviate the problem of inconsistent displacement increase speed due to speed differences and gear differences between fracturing pumps.

[0052] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A method for controlling the displacement of a fracturing device, wherein the fracturing device comprises at least one fracturing pump group, each of which comprises a plurality of fracturing pumps, characterized in that: The control method comprises: Acquire the actual total displacement of the fracturing pump group, and obtain a group control displacement deviation value of the fracturing pump group according to the actual total displacement and a preset total displacement; When the group control displacement deviation value is not zero, the fracturing pump with the smallest gear and the highest health priority in the fracturing pump group is obtained, and it is determined whether the actual displacement of the single fracturing pump reaches the single preset displacement. If so, the fracturing pump is determined as the fracturing pump that needs to adjust the displacement; Allocating displacement to the fracturing pump that needs to adjust displacement, and obtaining a target gear position and a target speed of the fracturing pump according to the allocated displacement; The fracturing pump is regulated to the target gear position and the target speed.

2. The control method according to claim 1, characterized in that: The obtaining of the actual total displacement of the fracturing pump group comprises: Obtaining the actual displacement of each fracturing pump in the fracturing pump group; The actual total displacement of the fracturing pump group is obtained according to the actual displacement of each fracturing pump.

3. The control method according to claim 1, characterized in that: When the group control displacement deviation value is not zero, the control method further includes: Determine whether the multi-stage overpressure protection has been triggered or is being triggered; If the multi-stage overpressure protection has been triggered or is being triggered, the current cycle ends; If the multi-stage overpressure protection is not triggered, the fracturing pump with the smallest gear position and the highest health priority in the fracturing pump group is obtained.

4. The control method according to claim 1, characterized in that: The step of obtaining the fracturing pump with the smallest gear position and the highest health priority in the fracturing pump group includes: Eliminate the fracturing pump that has reached the maximum displacement in the fracturing pump group; Arrange the remaining fracturing pumps in order of increasing gear position; Sort by health priority; The fracturing pump with the smallest gear position and the highest health priority is selected.

5. The control method according to claim 4, characterized in that: After selecting the fracturing pump with the smallest gear position and the highest health priority, the control method further includes: Determine whether the actual displacement of the single unit of the fracturing pump with the smallest gear and the highest health priority reaches the single unit preset displacement; If the preset displacement of the single machine is not reached, the current gear position of the fracturing pump with the smallest gear position and the highest health priority is recorded, and the second-ranked fracturing pump is reselected based on the current gear position and health priority; Determine whether the second-ranked fracturing pump meets the condition that the actual displacement of the single machine reaches the preset displacement of the single machine and does not exceed the first-ranked fracturing pump by two gears; If the preset displacement of a single machine is reached, the second-ranked fracturing pump is determined as the fracturing pump that needs to adjust the displacement; If the preset displacement of the single machine is not reached, the remaining fracturing pumps are determined in turn until the fracturing pump that needs to adjust the displacement is selected. If all the remaining fracturing pumps do not meet the condition that the actual displacement of the single machine reaches the preset displacement of the single machine and does not exceed the first-ranked fracturing pump by two gears, the cycle is terminated.

6. The control method according to claim 1, characterized in that: The method of allocating displacement to the fracturing pump that needs to adjust displacement includes: Determine whether the actual displacement of the single machine exceeds the preset displacement of the single machine after the fracturing pump that needs to adjust the displacement is shifted up; If the actual displacement of the single machine does not exceed the preset displacement of the single machine, the maximum displacement of the next gear is allocated to the fracturing pump, and the allocated displacement is subtracted from the remaining displacement; If the actual displacement of a single machine does not exceed the preset displacement of a single machine, only the remaining displacement will be allocated.

7. The control method according to claim 6, characterized in that: The method of allocating displacement to the fracturing pump that needs to adjust displacement also includes: The waiting time between each two fracturing pumps in the fracturing pump group increasing their displacement is calculated according to the value of the allocated displacement and the displacement increase speed parameter.

8. The control method according to claim 1, characterized in that: The fracturing equipment includes a plurality of the fracturing pump groups; Before obtaining the actual total displacement of the fracturing pump group, the control method further includes: The fracturing pump group having the largest displacement difference between the actual total displacement and the preset total displacement among the multiple fracturing pump groups is determined, and the fracturing pump group is determined as the fracturing pump group that needs to be lifted.

9. The control method according to claim 8, characterized in that: After determining the fracturing pump group that needs to be lifted, the control method further includes: Determining whether the suction pressure of the fracturing pump group that needs to be increased is greater than a preset suction pressure; If it is not greater than the preset suction pressure, there is a risk of emptying, and this cycle ends; If it is greater than the preset suction pressure, the step of obtaining the actual total displacement of the fracturing pump group is performed.

10. The control method according to claim 8, characterized in that: Before determining the fracturing pump group that needs to be lifted, the control method further includes: Determining whether the status of each of the fracturing pumps has been confirmed, wherein determining whether the current process is a pumping process, and determining whether overpressure protection is triggered; If the status of each of the fracturing pumps has been confirmed, the current process is a pumping process, and the overpressure protection is not triggered, the step of determining the fracturing pump group that needs to be lifted is performed.

11. A fracturing device, characterized in that: The output displacement is controlled by the control method described in any one of claims 1 to 10.

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