Driving method, driving apparatus, driving system, oilfield equipment, fracturing system, and fracturing device

Abstract

A driving method, a driving apparatus, a driving system, an oilfield equipment, a fracturing system, and a fracturing device. The method comprises: when the current torque demand of a drive pump satisfies a hybrid driving condition, acquiring the current state of charge of a storage battery (S202); on the basis of the current torque demand and the current state of charge, determining a target driving strategy (S204); and on the basis of the obtained target driving strategy, driving the drive pump to operate (S206).

Description

Drive methods, drive devices, drive systems, oilfield equipment, fracturing systems and fracturing equipment

[0001] Related applications

[0002] This application claims priority to Chinese Patent Application No. 2025101370983, filed on February 7, 2025, entitled "Driving Method, Apparatus, System and Oilfield Equipment", the entire contents of which are incorporated herein by reference.

[0003] This application claims priority to Chinese Patent Application No. 2025201928641, filed on February 7, 2025, entitled "Hybrid Fracturing System and Hybrid Fracturing Equipment", the entire contents of which are incorporated herein by reference. Technical Field

[0004] This application relates to the field of equipment control technology, and in particular to a driving method, driving device, driving system, oilfield equipment, fracturing system and fracturing equipment. Background Technology

[0005] With the development of oilfield construction technology, many oilfield equipment with different engineering capabilities have emerged, such as cementing equipment, sand mixing equipment and fracturing equipment in oilfields. These oilfield equipment all use drive pumps as the output terminal of the equipment.

[0006] However, traditional oilfield equipment often uses a single type of energy to power the pumps, which lacks flexibility. Summary of the Invention

[0007] Therefore, it is necessary to provide a driving method, driving device, driving system, oilfield equipment, fracturing system, and fracturing equipment that can improve the flexibility of driving pump driving mode in response to the above-mentioned technical problems.

[0008] In a first aspect, this application provides a driving method applied to a drive system; the drive system includes an engine, an electric motor, a battery, and a drive pump; the drive pump is connected to both the engine and the electric motor, and the electric motor is connected to the battery; the method includes:

[0009] If the current torque demand of the drive pump meets the hybrid drive conditions, obtain the current battery charge.

[0010] Determine the target driving strategy based on the current torque demand and current battery level;

[0011] Drive the pump to operate according to the target-driven strategy;

[0012] The target drive strategy is used to indicate the operating mode of the engine and / or electric motor to match the current torque demand of the drive pump.

[0013] In one embodiment, the method further includes:

[0014] If the current torque demand does not meet the hybrid drive conditions, the engine or motor is instructed to enter the working state to drive the drive pump.

[0015] In one embodiment, if the current torque demand does not meet the hybrid drive conditions, the engine or motor is instructed to enter an operating state, including:

[0016] When the current torque demand is greater than the first power demand threshold, it is determined that the current torque demand does not meet the hybrid drive conditions, and the engine is instructed to transmit the output power to the drive pump through the transfer case.

[0017] The transfer case is connected to the engine via a first transmission device and to the drive pump via a second transmission device.

[0018] In one embodiment, if the current torque demand does not meet the hybrid drive conditions, the engine or motor is instructed to enter an operating state, including:

[0019] When the current torque demand is less than the second power demand threshold, it is determined that the current torque demand does not meet the hybrid drive conditions, and the battery is instructed to output electrical energy to the motor through the motor control circuit; the second power demand threshold is less than the first power demand threshold.

[0020] The motor control circuit includes a combiner cabinet, a converter, and a frequency converter; the frequency converter is electrically connected to the converter, the motor, and the generator respectively; the converter is connected to the battery through the combiner cabinet; the generator is electrically connected to the converter; the motor is connected to the drive pump through a third transmission device, and the generator is connected to the transfer case through a fourth transmission device.

[0021] In one embodiment, a target driving strategy is determined based on the current torque demand and the current battery level, including:

[0022] When the current torque demand falls within the first hybrid torque demand range and the battery is determined to be in a depleted state based on the current charge level, the target drive strategy is determined to be that the engine transmits a portion of the output power to the drive pump through the transfer case via the second transmission device.

[0023] When the current torque demand falls within the second hybrid torque demand range and the battery is determined to be in a non-power-out state based on the current charge level, the target drive strategy is determined as follows: the engine transmits the output power to the drive pump through the first transmission device, transfer case and second transmission device, and the battery outputs electrical energy to the motor through the motor control circuit so that the motor transmits the output power to the drive pump through the third transmission device.

[0024] Among them, the upper limit of the first hybrid torque demand range is less than the lower limit of the second hybrid torque demand range.

[0025] In one embodiment, the method further includes:

[0026] When the current torque demand falls within the first hybrid torque demand range, and the battery is determined to be in a depleted state based on the current charge level, the engine is instructed to transmit another portion of the output power to the generator through the transfer case, so that the generator can charge the battery through the converter and combiner cabinet.

[0027] In one embodiment, a target driving strategy is determined based on the current torque demand and the current battery level, including:

[0028] When the current torque demand falls within the third hybrid torque demand range, and the battery is determined to be in a non-discharged state based on the current charge level, the target drive strategy is determined to be that the engine transmits output power to the generator through the transfer case, and the battery outputs electrical energy to the motor through the motor control circuit, so as to jointly drive the drive pump to work.

[0029] When the current torque demand falls within the fourth hybrid torque demand range and the battery is determined to be in a depleted state based on the current charge level, the target drive strategy is determined to be that the battery outputs electrical energy to the motor through the motor control circuit to drive the drive pump.

[0030] Among them, the upper limit of the fourth hybrid torque demand range is lower than the lower limit of the third hybrid torque demand range.

[0031] In one embodiment, the method further includes:

[0032] When the current torque demand falls within the fourth hybrid torque demand range and the battery is determined to be in a depleted state based on the current charge level, the engine is instructed to transmit the output power to the generator through the first transmission device and transfer case, so that the generator can charge the battery through the converter and combiner cabinet.

[0033] In one embodiment, a target driving strategy is determined based on the current torque demand and the current battery level, including:

[0034] When the current torque demand falls within the fourth hybrid torque demand range, and the battery is determined to be in a severely depleted state based on the current charge level, the target drive strategy is determined to be that the engine transmits the output power to the generator through the first transmission device and transfer case. The generator then outputs a portion of the generated power to the motor after processing by the frequency converter, in order to drive the drive pump.

[0035] In one embodiment, the method further includes:

[0036] When the current torque demand falls into the fourth hybrid torque demand range, and the battery is determined to be in a severely depleted state based on the current charge level, the generator will use another portion of its power output to charge the battery through the converter and combiner cabinet.

[0037] Secondly, this application provides a drive device applied to a drive system; the drive system includes an engine, an electric motor, a battery, and a drive pump; the drive pump is connected to both the engine and the electric motor, and the electric motor is connected to the battery; the device includes:

[0038] The power information acquisition module is used to acquire the current power of the battery when the current torque demand of the drive pump meets the hybrid drive conditions.

[0039] The strategy determination module is used to determine the target driving strategy based on the current torque demand and the current battery level.

[0040] The strategy execution module is used to drive the pump action according to the target driving strategy;

[0041] The target drive strategy is used to indicate the operating mode of the engine and / or electric motor to match the current torque demand of the drive pump.

[0042] Thirdly, this application provides a drive system, which includes an engine, an electric motor, a battery, a drive pump, and a controller;

[0043] The drive pump is connected to both the engine and the motor; the motor is connected to the battery; the controller is connected to the engine, the motor, the battery, and the drive pump.

[0044] The controller is used to execute the steps of the driving method as described in any of the above method embodiments.

[0045] In one embodiment, the system further includes a transfer case, a first transmission device, a second transmission device, a third transmission device, a fourth transmission device, a generator, and a motor control circuit; the motor control circuit includes a frequency converter, a converter, and a combiner cabinet.

[0046] The transfer case is connected to the engine via the first transmission device and to the drive pump via the second transmission device; the frequency converter is electrically connected to the inverter, the motor and the generator respectively; the inverter is connected to the battery via the combiner cabinet; the generator is electrically connected to the inverter; the motor is connected to the drive pump via the third transmission device, and the generator is connected to the transfer case via the fourth transmission device.

[0047] Fourthly, this application provides an oilfield device, including the drive system as described in the above system embodiments.

[0048] Fifthly, this application provides a hybrid power fracturing system, comprising:

[0049] The first power unit includes an engine and a transfer case. The transfer case is located on one side of the engine. The input end of the transfer case is connected to the engine through a first power transmission device. The output end of the transfer case includes a first output shaft and a second output shaft. The first output shaft drives the fracturing equipment through the second power transmission device.

[0050] The second power unit includes a power generation unit and a motor. The input end of the power generation unit is connected to the second output shaft through a fourth power transmission device, and the output end of the power generation unit is connected to the motor. The motor drives the fracturing equipment through a third power transmission device.

[0051] In one embodiment, the power generation unit includes a generator and a frequency converter, the frequency converter being disposed between the generator and the motor, the input end of the generator being connected to the second output shaft via a fourth power transmission device, the output end of the generator being connected to the frequency converter, and the frequency converter being connected to the motor.

[0052] In one embodiment, the second power unit further includes an energy storage unit disposed on one side of the frequency converter, the energy storage unit being connected to the frequency converter.

[0053] In one embodiment, the energy storage unit includes a battery, a combiner cabinet, and a converter arranged in sequence. The battery is connected to the combiner cabinet, the combiner cabinet is connected to the converter, and the converter is unidirectionally connected to the frequency converter.

[0054] In one embodiment, the output of the generator is connected to the converter, the converter is bidirectionally connected to the combiner cabinet, and the combiner cabinet is bidirectionally connected to the battery.

[0055] In one embodiment, the generator's output terminal includes a first output terminal and a second output terminal spaced apart, the first output terminal being connected to the frequency converter and the second output terminal being connected to the converter.

[0056] In one embodiment, an auxiliary unit is further included, which is disposed above or below the first power unit. The auxiliary unit includes a lubrication unit disposed below the engine for lubricating the first power unit and the second power unit.

[0057] In one embodiment, the auxiliary unit further includes an intake unit, an exhaust unit, and a ventilation unit. The ventilation unit is disposed above the engine for cooling the engine. The intake unit is disposed on one side of the ventilation unit for absorbing air. The exhaust unit is disposed on the other side of the ventilation unit and located between the engine and the transfer case for discharging exhaust gases.

[0058] In one embodiment, a control unit is also included, which is disposed on one side of the first power unit and electrically connected to the first power unit, the second power unit and the auxiliary unit respectively.

[0059] Sixthly, this application provides a hybrid power fracturing device, including the hybrid power fracturing system described above;

[0060] The hybrid fracturing equipment also includes a first transport device and a second transport device. The first transport device includes a first power unit, an auxiliary unit, a control unit, a generator, and an electric motor. The second transport device includes an energy storage unit and a frequency converter.

[0061] Details of one or more embodiments of this application are set forth in the following drawings and description. Other features, objects, and advantages of this application will become apparent from the specification, drawings, and claims. Attached Figure Description

[0062] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the disclosed drawings without creative effort.

[0063] Figure 1 is an application environment diagram of the driving method in one embodiment;

[0064] Figure 2 is a flowchart of the driving method in one embodiment;

[0065] Figure 3 is a flowchart illustrating the process of determining a target-driven strategy in one embodiment;

[0066] Figure 4 is a flowchart illustrating the determination of a target-driven strategy in another embodiment;

[0067] Figure 5 is a structural block diagram of the drive device in one embodiment;

[0068] Figure 6 is a structural block diagram of the drive system in one embodiment;

[0069] Figure 7 is a schematic diagram of the layout of a hybrid fracturing system;

[0070] Figure 8 is a schematic diagram of the layout of the first transportation equipment;

[0071] Figure 9 is a schematic diagram of the layout of the second transportation equipment. Detailed Implementation

[0072] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0073] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0074] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0075] It should be noted that if a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component. If a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0076] With the development of oilfield construction technology, many oilfield equipment with different engineering capabilities have emerged, such as cementing equipment, sand mixing equipment, and fracturing equipment. For example, the application of fracturing equipment in oilfields is a major measure to increase oil and gas production.

[0077] Due to limitations in construction costs and environmental pollution, oilfield operations are increasingly relying on electrically powered equipment, i.e., electrically driven fracturing operations. For example, the fracturing system of the aforementioned fracturing equipment can be connected to the power grid for power supply; alternatively, on-site power generation equipment can be installed to power the fracturing system.

[0078] Currently, electric drive operations in oilfields commonly use gas turbines to drive generator sets for power generation. However, this method of electric drive still has the following problems:

[0079] ① Gas turbines typically require black start equipment (such as diesel engines) to start the generator. If there are multiple generators, multiple black start equipment are required, resulting in equipment redundancy.

[0080] ② In the power supply mode of gas turbine generator sets, the power generation capacity is limited. For example, when operating at high temperatures, the power generation capacity of the gas turbine is reduced, and the power generation equipment may be at risk of overload.

[0081] ③ The power load of oilfield construction operations fluctuates greatly. If there is almost no need for power during the intermediate intermittent phases, the generator sets need to be kept running idle, which will result in fuel waste. Otherwise, some or all of the generator sets need to be started and stopped frequently according to the oilfield construction operation procedures, resulting in high operating costs and easily reducing the life of the generator sets.

[0082] ④ When using gas turbines as a power source to drive oilfield equipment, load fluctuations may occur due to changes in operating conditions. These load fluctuations mean that the gas turbine is not always operating in the economical range, resulting in energy waste.

[0083] The driving method provided in this application embodiment can be applied to the application environment shown in FIG1. ​​The driving system 10 includes an engine 104, a motor 106, a battery 108, and a drive pump 102; the drive pump 102 is connected to both the engine 104 and the motor 106, and the motor 106 is connected to the battery 108. It can be understood that the engine 104 and the drive pump 102, as well as the motor 106 and the drive pump 102, can be connected via a transmission device or transmission system; the motor 106 and the battery 108 are electrically connected.

[0084] In an exemplary embodiment, as shown in FIG2, a driving method is provided. Taking the application of this method to the driving system 10 in FIG1 as an example, the method includes the following steps S202 to S206. Wherein:

[0085] Step S202: If the current torque demand of the drive pump meets the hybrid drive conditions, obtain the current battery charge.

[0086] When the hybrid drive conditions are met, it means that the drive system can currently be operated using a hybrid power source.

[0087] Optionally, the hybrid drive condition can be a demand range that meets the torque requirement; when the drive system 10 is running within this torque demand range, it is determined that the hybrid drive condition is met, and the drive system 10 can be operated by a hybrid power source; when the drive system 10 is running outside this torque demand range, the drive system 10 is operated by a single power source.

[0088] Optionally, the hybrid drive condition can also be a power threshold range that satisfies the current power level of the battery 108; when the drive system 10 is running within the power threshold range, it is determined that the hybrid drive condition is met, and the drive system 10 can be operated by a hybrid power source; when the drive system 10 is running outside the power threshold range, the drive system 10 is operated by a single power source.

[0089] Optionally, the hybrid driving conditions can also be to meet a preset hybrid torque demand range and a preset hybrid power threshold range; when the drive system 10 is running in the state of the hybrid torque demand range and the hybrid power threshold range, it is determined that the hybrid driving conditions are met, and the drive system 10 is run by the hybrid power source; when the drive system 10 is running outside the torque demand range, the drive system 10 is run by a single power source.

[0090] It is understood that the above-mentioned hybrid drive conditions are not limited to the implementation methods mentioned in the above embodiments. As long as the drive system 10 can operate through the hybrid power source when the hybrid drive conditions are met, the embodiments of this application do not specifically limit the hybrid drive conditions.

[0091] In some examples, the drive system 10 may also include a battery 108 power monitor for monitoring the current charge level of the battery 108. Exemplarily, the method further includes acquiring the current charge level of the battery 108 via the battery 108 power monitor.

[0092] In some examples, the drive system 10 may also include a drive pump 102 torque monitor for monitoring the torque of the drive pump 102. Optionally, the drive pump 102 may include a plunger pump and a centrifugal pump, etc.

[0093] Specifically, when the current torque demand of the drive pump 102 meets the hybrid drive conditions, the drive system 10 can obtain the current charge of the battery 108 through the battery 108 power monitor.

[0094] Step S204: Determine the target driving strategy based on the current torque demand and current battery level.

[0095] The target drive strategy is used to indicate the operating mode of the engine and / or electric motor to match the current torque demand of the drive pump.

[0096] For example, the current torque requirement is matched with the current load condition of the drive pump 102. Alternatively, the current torque requirement can be obtained by comparing the load requirement of the drive pump 102 under the current operating conditions with the current output power of the system, and calculating the result of the comparison.

[0097] Specifically, the drive system 10 determines the target drive strategy to be executed based on the current torque demand of the drive pump 102 and the current charge of the battery 108.

[0098] Step S206: Drive the pump to operate according to the target drive strategy.

[0099] When the target drive strategy is executed, it can instruct the engine and / or motor to output power to meet the torque requirements of the drive pump in the current system.

[0100] Specifically, after determining the target driving strategy of the current system, the drive system 10 can control the engine 104 and / or the electric motor 106 to output power by executing the target driving strategy, thereby meeting the torque requirements of the drive pump 102 of the current system.

[0101] In the above driving method, when the current torque demand of the drive pump meets the hybrid drive conditions, the current battery charge is obtained. Then, based on the current torque demand and the current battery charge, a target drive strategy is determined and executed, and the drive pump is driven according to the target drive strategy. This application effectively improves the flexibility of the drive pump driving mode by determining the corresponding target drive strategy based on the torque demand and the current battery charge.

[0102] In one embodiment, the method further includes:

[0103] If the current torque demand does not meet the hybrid drive conditions, the engine or motor is instructed to enter the working state to drive the drive pump.

[0104] When the hybrid drive conditions are not met, it means that the drive system 10 can be operated using a single power source.

[0105] Optionally, the hybrid drive condition can be a demand range that meets the torque requirement; when the drive system 10 operates outside this torque demand range, it is determined that the hybrid drive condition is not met, and the drive system 10 can be operated by a single power source.

[0106] Optionally, the hybrid drive condition can also be a power threshold range that satisfies the current power level of the battery 108; when the drive system 10 operates outside the power threshold range, it is determined that the hybrid drive condition is not met, and the drive system 10 can be operated by a single power source.

[0107] Optionally, the hybrid driving conditions can also be to meet a preset hybrid torque demand range and a preset hybrid power threshold range; when the drive system 10 operates outside of these hybrid torque demand range and hybrid power threshold range states, it is determined that the hybrid driving conditions are not met, and the drive system 10 can be operated by a single power source. It can be understood that the single power source in the above embodiments can be the engine 104 or the motor 106 in the drive system 10.

[0108] It is understood that the above-mentioned hybrid drive conditions are not limited to the implementation methods mentioned in the above embodiments. As long as the drive system 10 can operate with a single power source when the hybrid drive conditions are not met, the embodiments of this application do not specifically limit the hybrid drive conditions.

[0109] Specifically, when the current torque demand of the drive pump 102 does not meet the hybrid drive conditions, the drive system 10 instructs the engine 104 or the motor 106 to enter the working state as a single power source so that the drive pump 102 of the drive system 10 can perform the action.

[0110] In one embodiment, if the current torque demand does not meet the hybrid drive conditions, the engine or motor is instructed to enter an operating state, including:

[0111] When the current torque demand is greater than the first power demand threshold, it is determined that the current torque demand does not meet the hybrid drive conditions, and the engine is instructed to transmit the output power to the drive pump through the transfer case.

[0112] The transfer case is connected to the engine via a first transmission device and to the drive pump via a second transmission device.

[0113] For example, the first power demand threshold can be set when the drive pump 102 of the drive system 10 requires a large torque, such as when the plunger pump of the fracturing equipment is under a large load. When the current torque demand of the drive pump 102 is greater than the first power demand threshold, it indicates that the drive pump 102 currently has a large torque demand. At this time, the engine 104 can stably output a large torque to the drive pump 102 through the transfer case and transmission.

[0114] Optionally, the engine 104 of the aforementioned drive system 10 can be driven by fuel or natural gas. It is understood that the engine 104 can save fuel when operating at high speeds.

[0115] Specifically, when the current torque demand is greater than the first power demand threshold, it can be determined that the current torque demand does not meet the hybrid drive conditions, and the drive system 10 needs to output a large torque. At this time, the drive system 10 can instruct the engine 104 to transmit the output power to the drive pump 102 through the transfer case, thereby meeting the current torque demand of the drive pump 102 and saving fuel.

[0116] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be further described in detail below with reference to the drive system 10 shown in Figure 3 and the embodiments. It should be understood that the drive system shown in Figure 3 is only one possible implementation.

[0117] In one embodiment, if the current torque demand does not meet the hybrid drive conditions, the engine or motor is instructed to enter the operating state, including the following steps:

[0118] If the current torque demand is less than the second power demand threshold, it is determined that the current torque demand does not meet the hybrid drive conditions, and the battery is instructed to output electrical energy to the motor through the motor control circuit; the second power demand threshold is less than the first power demand threshold.

[0119] The motor control circuit includes a combiner cabinet 110, a converter 112, and a frequency converter 114. The frequency converter 114 is electrically connected to the converter 112, the motor 106, and the generator 116. The converter 112 is connected to the battery 108 through the combiner cabinet 110. The generator 116 is electrically connected to the converter 112. The motor 106 is connected to the drive pump 102 through the third transmission device 122, and the generator 116 is connected to the transfer case 126 through the fourth transmission device 124.

[0120] Understandably, when the battery 108 is discharging, the combiner cabinet 110 can collect the current from multiple batteries 108 into a main circuit; when the battery 108 is charging, the combiner cabinet 110 can distribute the main circuit current to each battery 108.

[0121] Optionally, the converter 112 may include a rectifier and an inverter. It is understood that when the battery 108 is discharging, the inverter can convert DC power to AC power; when the battery 108 is charging, the rectifier can convert AC power to DC power. In this way, the power conversion requirements of the motor 106, generator 116, and battery 108 can be met.

[0122] It is understood that the aforementioned frequency converter 114 can be used to control the operating speed of the motor 106 in the drive system. The aforementioned frequency converter 114 can adjust the speed, torque, and output power of the motor 106 by changing the input voltage and current frequency, thereby enabling it to operate in an optimal state and achieving the function of energy saving and consumption reduction.

[0123] For example, the second power demand threshold can be set when the drive pump 102 of the drive system requires only a small torque. When the current torque demand of the drive pump 102 is less than the first power demand threshold, it means that only a small torque needs to be output to the drive pump 102. At this time, the battery 108 can be instructed to use the stored electrical energy to drive the motor 106 to run in order to meet the current torque demand of the drive pump 102.

[0124] Specifically, the electrical energy output from the battery 108 of the drive system is combined through the combiner cabinet 110 and processed by the converter 112 before being transmitted to the frequency converter 114 of the motor 106 control circuit. The output electrical energy, after processing by the frequency converter 114, is transmitted to the motor 106 of the drive system. The motor 106 then converts the electrical energy output from the battery 108 into mechanical energy, and transmits the output power to the drive pump 102 through the third transmission device 122, thereby enabling the drive pump 102 to operate. It can be understood that, compared to using the torque output of the engine 104 to meet the torque requirements of the drive pump 102, this embodiment completely satisfies the torque requirements of the drive pump 102 through the motor 106 of the drive system 10. This allows for faster and more sensitive adjustment of torque output, enabling a rapid response to and fulfillment of torque requirements without slippage or wheel slippage.

[0125] In some possible implementations, when the drive pump 102 decelerates or stops, the remaining kinetic energy of the motor can be recovered to drive the generator 116 to charge the battery 108. This improves the system's energy efficiency, making the drive system more energy-saving and environmentally friendly.

[0126] In one embodiment, as shown in Figure 4, a target driving strategy is determined based on the current torque demand and the current battery level, including the following steps S402 to S404. Wherein:

[0127] Step S402: When the current torque demand falls within the first hybrid torque demand range and the battery is determined to be in a depleted state based on the current charge level, the target drive strategy is determined to be that the engine transmits a portion of the output power to the drive pump through the transfer case via the second transmission device.

[0128] When the current torque demand falls within the first hybrid torque demand range, it indicates that the drive pump of the drive system has a moderate level of torque demand at this time.

[0129] Specifically, when the torque demand of the drive pump 102 is moderate, and the battery 108 is either depleted or severely depleted, the engine 104 of the drive system generates power and transmits it to the transfer case 126 of the drive system via a transmission. The transfer case 126 then transmits a portion of the power output from the engine 104 to the generator 116 via a transmission for power generation. The remaining power output from the engine 104 is then transmitted to the drive pump 102 to meet its torque demand. In this operating mode, the drive system can meet the torque demand of the drive pump 102 by utilizing a portion of the power from the engine 104.

[0130] Step S404: When the current torque demand falls within the second hybrid torque demand range and the battery is determined to be in a non-power-out state based on the current charge level, the target drive strategy is determined as follows: the engine transmits the output power to the drive pump through the first transmission device, transfer case and second transmission device, and the battery outputs electrical energy to the motor through the motor control circuit so that the motor transmits the output power to the drive pump through the third transmission device.

[0131] Among them, the upper limit of the first hybrid torque demand range is less than the lower limit of the second hybrid torque demand range.

[0132] It is understandable that when the current torque demand falls into the second hybrid torque demand range, it means that the drive pump 102 of the drive system has a large torque demand at this time.

[0133] Specifically, when the drive pump 102 of the drive system has a large torque demand and the battery 108 has sufficient charge, the power received by the drive pump 102 can come from two paths: "engine 104 → first transmission 118 → transfer case 126 → second transmission 120 → drive pump 102", and "battery 108 → combiner cabinet 110 → inverter 112 → frequency converter 114 → motor 106 → third transmission 122 → drive pump 102". Through this method, a larger torque can be output to the drive pump 102 of the drive system to better meet the torque demand of the drive pump 102 under high load conditions.

[0134] In one embodiment, the method further includes:

[0135] When the current torque demand falls within the first hybrid torque demand range, and the battery is determined to be in a depleted state based on the current charge level, the engine is instructed to transmit another portion of the output power to the generator through the transfer case, so that the generator can charge the battery through the converter and combiner cabinet.

[0136] When the current torque demand falls within the first hybrid torque demand range, it can be indicated that the drive pump 102 of the drive system has a moderate torque demand at this time.

[0137] Specifically, when the torque demand of the drive pump 102 is moderate and the battery 108 is either depleted or severely depleted, the power generated by the engine 104 of the drive system can be transmitted to the transfer case 126 of the drive system via the transmission. The transfer case 126 will further transmit a portion of the power output from the engine 104 to the generator 116 for power generation via the transmission. The power generated by the generator 116 can be transmitted to the battery 108 for energy storage via the system's converter 112 and combiner cabinet 110. The remaining power output from the engine 104 will be transmitted to the drive pump 102 to meet its torque demand. In this operating mode, the drive system 10 can both meet the torque demand of the current drive pump 102 and simultaneously charge the battery 108.

[0138] In one embodiment, as shown in Figure 5, a target driving strategy is determined based on the current torque demand and the current battery level, including the following steps S502 to S504. Wherein:

[0139] Step S502: When the current torque demand falls into the third hybrid torque demand range and the battery 108 is determined to be in a non-power-out state based on the current charge level, the target drive strategy is determined to be that the engine transmits the output power to the generator through the transfer case, and the battery outputs electrical energy to the motor through the motor control circuit, so as to jointly drive the drive pump to work.

[0140] When the current torque demand falls within the third hybrid torque demand range, it indicates that the drive pump of the drive system has a moderate level of torque demand (power demand). Optionally, the third hybrid torque demand range can be set to the same torque demand range as the first hybrid torque demand range.

[0141] Specifically, the engine 104 of the drive system generates power and transmits it to the transfer case 126 via a transmission device. The transfer case 126 then transmits the power to the generator 116 via the transmission device, enabling the generator 116 to generate electrical energy. When the drive pump 102 requires moderate power and the battery 108 has sufficient charge, the power generated by the generator 116 is transmitted to the motor 106 after being frequency-converted by the frequency converter 114. At the same time, the electrical energy stored in the battery 108 is transmitted to the motor 106 after being processed by the combiner cabinet 110, the converter 112, and the frequency converter 114. Thus, the electrical energy received by the motor 106 comes from the generator 116 and the battery 108. The motor 106 then converts the received electrical energy into mechanical energy and transmits the output power to the drive pump 102 via the transmission device to meet the torque requirements of the drive pump 102.

[0142] Step S504: When the current torque demand falls into the fourth hybrid torque demand range and the battery is determined to be in a depleted state based on the current charge level, the target drive strategy is determined to be that the battery outputs electrical energy to the motor through the motor control circuit to drive the drive pump.

[0143] Among them, the upper limit of the fourth hybrid torque demand range is lower than the lower limit of the third hybrid torque demand range.

[0144] For example, when the current torque demand falls within the fourth hybrid torque demand range, it can be said that the drive pump of the drive system has a relatively small torque demand at this time.

[0145] Specifically, when the power required to drive the pump 102 is low and the battery 108 of the drive system is currently depleted, the remaining power of the battery 108 can be used to drive the motor 106 to meet the current small torque demand of the pump 102. It can be understood that using the output power of the motor 106 to meet the small torque demand allows for faster adjustment of torque output and more flexible response to changes in torque demand.

[0146] In one embodiment, the method further includes:

[0147] When the current torque demand falls within the fourth hybrid torque demand range and the battery is determined to be in a depleted state based on the current charge level, the engine is instructed to transmit the output power to the generator through the first transmission device and transfer case, so that the generator can charge the battery through the converter and combiner cabinet.

[0148] When the current torque demand falls into the fourth hybrid torque demand range, it can be said that the drive pump of the drive system has a relatively small torque demand at this time.

[0149] Specifically, when the drive pump 102 requires low power and the drive system's battery 108 is currently unpowered, the electrical energy generated by the drive system's generator 116 is output to the battery 108 through the converter 112 and combiner cabinet 110 to charge the battery 108. At this time, the electrical energy required by the motor 106 is provided by the battery 108. It can be understood that the electrical energy consumed by the motor 106 from the battery 108 is less than the electrical energy used by the generator 116 to charge the battery 108. This method satisfies the relatively low torque requirement of the drive pump 102 while simultaneously charging the battery 108, thus eliminating the need to allocate separate charging time for the battery 108 to the drive system and improving the efficiency of the drive system.

[0150] In one embodiment, a target driving strategy is determined based on the current torque demand and the current battery level, including the following steps:

[0151] When the current torque demand falls within the fourth hybrid torque demand range, and the battery is determined to be in a severely depleted state based on the current charge level, the target drive strategy is determined to be that the engine transmits the output power to the generator through the first transmission device and transfer case. The generator then outputs a portion of the generated power to the motor after processing by the frequency converter, in order to drive the drive pump.

[0152] When the current torque demand falls into the fourth hybrid torque demand range, it can be said that the drive pump of the drive system has a relatively small torque demand at this time.

[0153] Specifically, when the power required by the drive pump 102 is low and the battery 108 is in a severely depleted state, a portion of the electrical energy generated by the generator 116 of the drive system is transmitted to the motor 106 after frequency conversion to drive the motor 106 to output power, thereby meeting the relatively small torque requirement of the drive pump 102. It can be understood that at this time, the electrical energy required by the motor 106 is entirely provided by the generator 116.

[0154] In one embodiment, the method further includes:

[0155] When the current torque demand falls into the fourth hybrid torque demand range, and the battery is determined to be in a severely depleted state based on the current charge level, the generator will use another portion of its power output to charge the battery through the converter and combiner cabinet.

[0156] The current torque demand falls within the fourth hybrid torque demand range, which indicates that the drive pump of the drive system has a relatively small torque demand at this time.

[0157] Specifically, when the power required by the drive pump 102 is low and the battery 108 is in a severely depleted state, a portion of the electrical energy generated by the generator 116 of the drive system is transmitted to the motor 106 after frequency conversion to drive the motor 106 to output power, thereby meeting the relatively small torque requirement of the drive pump 102; another portion of the electrical energy generated by the generator 116 is transmitted to the battery 108 through the converter 112 and the combiner cabinet 110 to charge the battery 108. It can be understood that at this time, the electrical energy required by the motor 106 is entirely provided by the generator 116. At the same time, the generator 116 is also used to charge the battery 108 in a severely depleted state.

[0158] The hybrid drive mode of this application features energy conservation and environmental protection, improving the utilization rate of system energy (such as natural gas and diesel), and has the effect of peak shaving and valley filling. It allows the generator to avoid operating under low load conditions and enables the engine to operate under the most fuel-efficient and economical conditions. Secondly, the drive system of this application adapts to a wide range of power demands, achieving economical operation across various demand ranges, and has strong applicability. Furthermore, this application can also address the needs of small-scale oilfield operations, maximizing fuel utilization and reducing operating costs.

[0159] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0160] Based on the same inventive concept, this application also provides a driving device for implementing the driving method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more driving device embodiments provided below can be found in the limitations of the driving method described above, and will not be repeated here.

[0161] In an exemplary embodiment, as shown in FIG6, a drive device 600 is provided, applied to a drive system; the drive system includes an engine, a motor, a battery, and a drive pump; the drive pump is connected to both the engine and the motor, and the motor is connected to the battery; the device 600 includes:

[0162] The power information acquisition module 602 is used to acquire the current power of the battery when the current torque demand of the drive pump meets the hybrid drive conditions.

[0163] The strategy determination module 604 is used to determine the target driving strategy based on the current torque demand and the current battery level;

[0164] The strategy execution module 606 is used to drive the drive pump to operate according to the target drive strategy; wherein the target drive strategy is used to indicate the operating mode of the engine and / or motor to match the current torque demand of the drive pump.

[0165] In one embodiment, the device 600 further includes:

[0166] The non-hybrid operating module is used to instruct the engine or motor to enter the working state to drive the drive pump when the current torque demand does not meet the hybrid drive conditions.

[0167] In one embodiment, the non-hybrid operating module is further configured to:

[0168] When the current torque demand is greater than the first power demand threshold, it is determined that the current torque demand does not meet the hybrid drive conditions, and the engine is instructed to transmit the output power to the drive pump through the transfer case.

[0169] The transfer case is connected to the engine via a first transmission device and to the drive pump via a second transmission device.

[0170] In one embodiment, the non-hybrid operating module is further configured to:

[0171] When the current torque demand is less than the second power demand threshold, it is determined that the current torque demand does not meet the hybrid drive conditions, and the battery is instructed to output electrical energy to the motor through the motor control circuit; the second power demand threshold is less than the first power demand threshold.

[0172] The motor control circuit includes a combiner cabinet, a converter, and a frequency converter; the frequency converter is electrically connected to the converter, the motor, and the generator respectively; the converter is connected to the battery through the combiner cabinet; the generator is electrically connected to the converter; the motor is connected to the drive pump through a third transmission device, and the generator is connected to the transfer case through a fourth transmission device.

[0173] In one embodiment, the strategy determination module 604 is further configured to:

[0174] When the current torque demand falls within the first hybrid torque demand range and the battery is determined to be in a depleted state based on the current charge level, the target drive strategy is determined to be that the engine transmits a portion of the output power to the drive pump through the transfer case via the second transmission device.

[0175] When the current torque demand falls within the second hybrid torque demand range and the battery is determined to be in a non-power-out state based on the current charge level, the target drive strategy is determined as follows: the engine transmits the output power to the drive pump through the first transmission device, transfer case and second transmission device, and the battery outputs electrical energy to the motor through the motor control circuit so that the motor transmits the output power to the drive pump through the third transmission device.

[0176] Among them, the upper limit of the first hybrid torque demand range is less than the lower limit of the second hybrid torque demand range.

[0177] In one embodiment, the device 600 further includes:

[0178] The first charging module is used to instruct the engine to transmit another part of the output power to the generator through the transfer case when the current torque demand falls within the first hybrid torque demand range and the battery is determined to be in a depleted state based on the current charge level, so that the generator can charge the battery through the inverter and combiner cabinet.

[0179] In one embodiment, the strategy determination module 604 is further configured to:

[0180] When the current torque demand falls within the third hybrid torque demand range, and the battery is determined to be in a non-discharged state based on the current charge level, the target drive strategy is determined to be that the engine transmits output power to the generator through the transfer case, and the battery outputs electrical energy to the motor through the motor control circuit, so as to jointly drive the drive pump to work.

[0181] When the current torque demand falls within the fourth hybrid torque demand range and the battery is determined to be in a depleted state based on the current charge level, the target drive strategy is determined to be that the battery outputs electrical energy to the motor through the motor control circuit to drive the drive pump.

[0182] Among them, the upper limit of the fourth hybrid torque demand range is lower than the lower limit of the third hybrid torque demand range.

[0183] In one embodiment, the device 600 further includes:

[0184] The second charging module is used to instruct the engine to transmit the output power to the generator through the first transmission device and transfer case when the current torque demand falls within the fourth hybrid torque demand range and the battery is determined to be in a depleted state based on the current charge level, so that the generator can charge the battery through the inverter and combiner cabinet.

[0185] In one embodiment, the strategy determination module 604 is further configured to:

[0186] When the current torque demand falls within the fourth hybrid torque demand range, and the battery is determined to be in a severely depleted state based on the current charge level, the target drive strategy is determined to be that the engine transmits the output power to the generator through the first transmission device and transfer case. The generator then outputs a portion of the generated power to the motor after processing by the frequency converter, in order to drive the drive pump.

[0187] In one embodiment, the device 600 further includes:

[0188] The third charging module is used when the current torque demand falls into the fourth hybrid torque demand range and the battery is determined to be in a severely depleted state based on the current power level. In this case, the generator will use another part of the generated power to charge the battery through the converter and combiner cabinet.

[0189] Each module in the aforementioned drive device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0190] In an exemplary embodiment, as shown in FIG3, this application provides a drive system 10, which includes an engine 104, an electric motor 106, a battery 108, a drive pump 102, and a controller (not shown in the figure).

[0191] The drive pump 102 is connected to the engine 104 and the motor 106 respectively; the motor 106 is connected to the battery 108; the controller is connected to the engine 104, the motor 106, the battery 108 and the drive pump 102 respectively.

[0192] The controller is used to execute the steps of the driving method as described in any of the above method embodiments.

[0193] In one embodiment, the system 10 further includes a transfer case 126, a first transmission device 118, a second transmission device 120, a third transmission device 122, a fourth transmission device 124, a generator 116, and a motor 106 control circuit; the motor 106 control circuit includes a frequency converter 114, a converter 112, and a combiner cabinet 110.

[0194] Transfer case 126 is connected to engine 104 via first transmission device 118 and drive pump 102 via second transmission device 120; inverter 114 is electrically connected to converter 112, motor 106 and generator 116 respectively; converter 112 is connected to battery 108 via combiner cabinet 110; generator 116 is electrically connected to converter 112; motor 106 is connected to drive pump 102 via third transmission device 122 and generator 116 is connected to transfer case 126 via fourth transmission device 124.

[0195] This application provides an oilfield device, including a drive system 10 as described in the above system embodiment.

[0196] In some examples, the oilfield equipment may also include the following auxiliary systems:

[0197] Lubrication system: can be used to provide lubricating oil to engines, generators, motors, transfer cases, and transmission devices during operation.

[0198] Air intake system: Engines need air to burn fuel, and the air intake system can filter and muffle this air before supplying it to the engine.

[0199] Exhaust system: It can be used to silence the high-temperature smoke from engine combustion before it is discharged.

[0200] Cabin: The entire drive system can be housed within the cabin, which can also be used for rain protection and sound insulation.

[0201] Ventilation system: can be used to ventilate and cool the cabin.

[0202] Fire protection system: can be fire extinguishing modules distributed throughout the drive system; furthermore, fire extinguishing media can be replenished to the fire extinguishing modules through pipelines.

[0203] Optionally, the aforementioned drive system can be a dual-vehicle arrangement. For example, the battery or engine can be located in the first vehicle, while the drive pump can be located in the second vehicle. It is understood that the dual-vehicle arrangement can have other possible implementations, as long as the drive system can fulfill the function of meeting the torque requirements of the drive pump. This application does not specifically limit the manner of the dual-vehicle arrangement.

[0204] Optionally, the first or second transport vehicle mentioned above can be a chassis vehicle, boat, or other carrier. Setting the drive system to a mobile system facilitates rapid relocation and resumption of work in the oilfield environment.

[0205] Those skilled in the art will understand that the structure shown in Figure 3 is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the drive system to which the present application is applied. The specific drive system may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0206] In oil and gas field fracturing operations, traditional fracturing methods powered by diesel engines and other equipment have gradually revealed drawbacks such as high costs and significant environmental pollution. Currently, electric drive methods are commonly used for fracturing operations. One approach is to directly connect the fracturing system to the power grid, utilizing the electricity provided by the grid. Another approach is to install power generation equipment at the work site, such as a gas turbine-driven generator set, to provide the necessary power.

[0207] However, the starting process of gas turbine-driven generator sets typically relies on black-start equipment, such as diesel engine-driven power equipment. In scenarios where multiple generators operate in parallel, each generator requires a corresponding black-start device, leading to redundancy in starting equipment and increasing equipment and maintenance costs. Secondly, in high-temperature operating environments, the power generation capacity of gas turbines decreases significantly, potentially causing overload of the power generation equipment and affecting the normal operation of fracturing. Furthermore, the electrical load of fracturing operations fluctuates considerably. During operational breaks, if the generator set remains idle, it wastes fuel; while frequent start-stop cycles to adapt to load changes not only increase costs but may also shorten the generator set's lifespan. Additionally, when a gas turbine is used as a power source to drive fracturing equipment, due to load fluctuations, the gas turbine's output often cannot remain within the economical range, resulting in energy waste. This not only affects the efficiency of fracturing operations but also increases operating costs.

[0208] In summary, there are still some problems to be solved in terms of power supply methods, power generation limitations, load fluctuation adaptability, and energy utilization efficiency in current electric fracturing operations.

[0209] To address the aforementioned problems, this application also provides a hybrid power fracturing system.

[0210] In an exemplary embodiment, referring to FIG7, FIG7 shows a schematic layout of a hybrid power fracturing system according to an embodiment of the present application. An embodiment of the present application provides a hybrid power fracturing system including a first power unit 71 and a second power unit 72, as well as a matching power transmission device 75 and fracturing equipment 76.

[0211] Specifically, the first power unit 71 includes an engine 104 and a transfer case 126. The transfer case 126 is located on one side of the engine 104, and its input end is connected to the engine 104 via a first power transmission device 751. The output end of the transfer case 126 includes a first output shaft 7121 and a second output shaft 7122. The first output shaft 7121 drives the fracturing equipment 76 via a second power transmission device 752. The second power unit 72 includes a generator unit 720 and an electric motor 721. The input end of the generator unit 720 is connected to the second output shaft 7122 via a fourth power transmission device 754, and its output end is connected to the electric motor 721. The electric motor 721 drives the fracturing equipment 76 via a third power transmission device 753.

[0212] In the specific implementation process, when high power output is required or the engine 104 is in the high-efficiency operating range, such as medium and high speed, the system mainly relies on the engine 104 to provide power, and directly drives the plunger pump through the first output shaft 7121 of the transfer case 126.

[0213] When fracturing operations require less torque, or when engine 104 is operating in a low-efficiency range, such as at low speed and high load, the system switches to electric motor 721-dominated mode. The power generation unit 720 generates electricity using a portion of the power transmitted from the second output shaft 7122 of the transfer case 126. Electric motor 721 then uses this electrical energy to drive the fracturing equipment 76, effectively avoiding the high fuel consumption problem of engine 104 under low-efficiency conditions.

[0214] As mentioned above, the hybrid power fracturing system can automatically or manually switch to the optimal operating mode based on current operational needs, engine operating conditions, and battery status, ensuring efficient and energy-saving fracturing operations. Therefore, the hybrid power fracturing system not only improves fuel economy but also significantly reduces emissions, achieving environmental protection and energy conservation.

[0215] In one embodiment, engine 104 may be a diesel engine, which has high thermal efficiency and good torque output characteristics.

[0216] In one embodiment, the transfer case 126 is mounted on one side of the engine 104 and receives power output from the engine 104 via the power transmission device 75. The transfer case 126 is used to distribute the input power to two independent first output shafts 7121 and second output shafts 7122.

[0217] In one embodiment, the power generation unit 720 includes a generator 116, the input of which is connected to the second output shaft 7122 of the transfer case 126 via a power transmission device 75, generating electricity using a portion of the power allocated by the transfer case 126. Preferably, the generator 116 may be located on one side of the transfer case 126 and below the fracturing equipment 76.

[0218] In one embodiment, the input terminal of the electric motor 721 is directly connected to the output terminal of the power generation unit 720 via a cable, receiving electrical energy and converting it into mechanical energy. Because the electric motor 721 has a fast torque response speed, rapid working reaction, and no slippage or rotation phenomenon, it can significantly improve the efficiency and stability of fracturing operations.

[0219] In one embodiment, the power transmission device 75 includes a coupling, a gear transmission mechanism, a belt transmission mechanism, etc. For example, in the first power unit 71, the engine 104 is directly connected to the transfer case 126 via a coupling; the first output shaft 7121 of the transfer case 126 drives the fracturing equipment 76, such as a plunger pump, via a gear transmission mechanism, such as a reduction gearbox. In the second power unit 72, the generator unit 720 is connected to the second output shaft 7122 of the transfer case 126 via a belt drive, while the electric motor 721 drives the same set of fracturing equipment 76 via a chain drive or direct connection. In this embodiment, the power transmission device 75 can be adaptively selected according to the specific application scenario.

[0220] In one embodiment, the fracturing equipment 76 employs a high-pressure plunger pump responsible for injecting high-pressure fluid into the formation to perform fracturing operations. The plunger pump is selected to withstand the high torque and speed variations transmitted from the engine 104 or the electric motor 721.

[0221] Referring to Figure 7, which is a schematic layout diagram of a hybrid power fracturing system provided in one embodiment of this application, in some embodiments, the power generation unit 720 includes a generator 116 and a frequency converter 114.

[0222] Specifically, the frequency converter 114 is located between the generator 116 and the motor 721. The input end of the generator 116 is connected to the second output shaft 7122 of the transfer case 126 via a fourth power transmission device 754, receiving mechanical power and converting it into electrical energy. The output end of the generator 116 is connected to the frequency converter 114, which is responsible for regulating the frequency and voltage of the electrical energy. The motor 721 is connected to the frequency converter 114 via a cable, receiving the regulated electrical energy and converting it into mechanical power, which drives the fracturing equipment 76 via a third power transmission device 753.

[0223] Referring to Figure 7, which is a schematic diagram of the layout of a hybrid power fracturing system provided in one embodiment of this application, in some embodiments, the second power unit 72 further includes an energy storage unit 724, which is disposed on one side of the frequency converter 114 and connected to the frequency converter 114. The frequency converter 114 is responsible for adjusting the frequency and voltage of the electrical energy to meet the operating requirements of the motor 721.

[0224] In one embodiment, the energy storage unit 724 includes a battery 108, a combiner cabinet 110, and a converter 112 arranged in sequence.

[0225] Specifically, the storage battery 108 is connected to the combiner cabinet 110, the combiner cabinet 110 is connected to the inverter 112, and the inverter 112 is unidirectionally connected to the frequency converter 114. In this embodiment, the storage battery 108, the combiner cabinet 110, and the inverter 112 can be arranged vertically in a row or horizontally in a row.

[0226] In one embodiment, the battery 108 serves as an energy storage device, used to release electrical energy to support the operation of the motor 721. In this embodiment, the type of battery 108 can be selected based on factors such as system power requirements, energy storage capacity, cycle life, and operating environment. For example, the battery 108 may be a lithium-ion battery or a lead-acid battery.

[0227] In one embodiment, the combiner cabinet 110 is used to combine the DC power output from the battery 108 into one or more channels for easy management and distribution. In this embodiment, the combiner cabinet 110 also has overcurrent protection, short-circuit protection, and other functions to ensure the safe operation of the system.

[0228] In one embodiment, the converter 112 converts the DC power output from the battery 108 into AC power to ensure compatibility with the AC power grid of the frequency converter 114. In this embodiment, the converter 112 and the frequency converter 114 are unidirectionally connected, meaning that power can only flow from the converter 112 to the frequency converter 114, preventing backflow of system power into the battery 108 and protecting the battery 108 from damage. In this embodiment, a suitable converter 112 model can be selected based on the DC voltage level of the battery 108, the voltage level of the system's AC power grid, and power requirements to ensure efficient power conversion and stable output.

[0229] In the specific implementation process, the battery 108 releases the stored electrical energy through the combiner cabinet 110 and the converter 112. The converter 112 converts the DC power into AC power and sends it to the frequency converter 114. The frequency converter 114 intelligently adjusts the frequency and voltage of the power according to the load and operating requirements of the motor 721 to ensure that the motor 721 drives the fracturing equipment 76 efficiently and stably.

[0230] As mentioned above, the hybrid fracturing system ensures stable operation and efficient operation under different working conditions through the design of the energy storage unit 724.

[0231] Referring to Figure 7, which is a schematic diagram of the layout of a hybrid fracturing system provided in one embodiment of this application, in some embodiments, the output terminal of the generator 116 includes a first output terminal 7221 and a second output terminal 7222 that are spaced apart.

[0232] Specifically, the first output terminal 7221 and the second output terminal 7222 are arranged vertically or horizontally. The first output terminal 7221 is connected to the frequency converter 114 via a cable to provide stable AC power to the motor 721. The second output terminal 7222 is connected to the converter 112 via a cable to provide power for charging the battery 108, ensuring stable power output and improving system reliability.

[0233] In one embodiment, the inverter 112 has a bidirectional power conversion function, which can convert the electrical energy output by the generator 116 into DC power suitable for charging the battery 108, and at the same time, it can convert the DC power in the battery 108 into AC power suitable for use by the frequency converter 114.

[0234] In one embodiment, the combiner cabinet 110 is bidirectionally connected to the inverter 112, receiving DC power from the inverter 112 and distributing it to the battery 108 for charging. Simultaneously, when needed, the combiner cabinet 110 can also draw power from the battery 108 and convert it into AC power via the inverter 112 to supply the frequency converter 114.

[0235] In one embodiment, the battery 108 is bidirectionally connected to the combiner cabinet 110, which can store electrical energy when the generator 116 generates excess electrical energy and release electrical energy when needed to support the operation of the motor 721, so that the system can operate independently at construction sites without grid coverage and without relying on external power sources.

[0236] In this embodiment, the hybrid fracturing system employs multiple power transmission devices 75, and the hybrid fracturing system includes the following multiple operating modes:

[0237] (1) Full power output of engine 104: When high power demand is required, engine 104 transmits power to transfer case 126 through first power transmission device 751, and transfer case 126 provides all power to plunger pump through second power transmission device 752.

[0238] (2) Partial power output of engine 104 and charging of battery 108: When the power demand is low and the battery 108 is depleted, engine 104 transmits power to transfer case 126 through first power transmission device 751. Transfer case 126 transmits part of the power to generator 116 through fourth power transmission device 754. The AC power generated by generator 116 is converted into DC power through converter 112 and then charged to battery 108 through combiner cabinet 110. At the same time, transfer case 126 provides another part of the power to plunger pump through second power transmission device 752.

[0239] (3) Engine 104 and battery 108 jointly drive: When the power demand is particularly high and the battery 108 has sufficient power, the engine 104 transmits power to the transfer case 126 through the first power transmission device 751. The transfer case 126 provides all the power to the plunger pump through the second power transmission device 752. At the same time, the battery 108 supplies power to the motor 721 through the combiner cabinet 110, converter 112 and frequency converter 114. The motor 721 provides additional power to the plunger pump through the third power transmission device 753.

[0240] (4) Generator 116 and battery 108 jointly supply power: When the power demand is moderate and the battery 108 has sufficient power, the engine 104 transmits power to the transfer case 126 through the first power transmission device 751. The transfer case 126 transmits all the power to the generator 116 through the fourth power transmission device 754 to generate electricity. The electrical energy generated by the generator 116 is transmitted to the motor 721 through the frequency converter 114. At the same time, the battery 108 provides electrical energy to the motor 721 through the combiner cabinet 110, converter 112 and frequency converter 114. The motor 721 provides power to the plunger pump through the third power transmission device 753.

[0241] (5) Battery 108 provides power independently: When the power demand is low and the battery 108 is depleted, the engine 104 transmits power to the transfer case 126 through the first power transmission device 751. The transfer case 126 transmits power to the generator 116 through the fourth power transmission device 754 to generate electricity. The electrical energy generated by the generator 116 is stored in the battery 108 through the converter 112 and the combiner cabinet 110. The battery 108 provides the required electrical energy for the motor 721.

[0242] (6) Generator 116 provides power and charges independently: When the power demand is low and the battery 108 is severely depleted, the engine 104 transmits power to the transfer case 126 through the first power transmission device 751. The transfer case 126 transmits power to the generator 116 through the fourth power transmission device 754 to generate electricity. Part of the electrical energy generated by the generator 116 is processed by the frequency converter 114 and transmitted to the motor 721. The other part is stored in the battery 108 through the converter 112 and the combiner cabinet 110.

[0243] (7) Battery 108 drive: Battery 108 supplies power to motor 721 through combiner cabinet 110, converter 112 and frequency converter 114. Motor 721 supplies power to plunger pump through third power transmission device 753.

[0244] As described above, the hybrid fracturing system can automatically adjust the power source and distribution according to the power demand of the plunger pump and the charge status of the battery 108 to achieve optimal energy utilization and operational efficiency.

[0245] Referring to Figure 8, which is a layout schematic diagram of the first transport device 87 provided in one embodiment of this application, in some embodiments, the hybrid fracturing system further includes an auxiliary unit 83, which is disposed above or below the first power unit 71.

[0246] In one embodiment, the auxiliary unit 83 further includes a lubrication unit 831, which is disposed below the engine 104 for lubricating the first power unit 71 and the second power unit 72. Specifically, the lubrication unit 831 provides a continuous supply of lubricating oil to the engine 104, generator 116, electric motor 721, transfer case 126, and power transmission device 75 in the system to reduce wear and extend equipment life.

[0247] In one embodiment, the auxiliary unit 83 includes an intake unit 832, an exhaust unit 833, and a ventilation unit 834. The ventilation unit 834 is disposed above the engine 104 of the first power unit 71 for cooling the engine 104. The intake unit 832 is disposed on one side of the ventilation unit 834, i.e., on the left or right side of the ventilation unit 834, for absorbing air. The exhaust unit 833 is disposed on the other side of the ventilation unit 834, i.e., on the right or left side of the ventilation unit 834, and is located between the engine 104 and the transfer case 126 for discharging exhaust gases.

[0248] In one embodiment, the auxiliary unit 83 further includes a fire-fighting unit and an installation unit.

[0249] Specifically, the installation unit includes a robust, rainproof, and soundproof enclosure, providing a protective installation environment for the entire power unit. A ventilation unit 834 maintains a suitable temperature within the enclosure to prevent overheating. A fire suppression unit provides firefighting capabilities in emergencies, ensuring the safety of personnel and equipment. An intake unit 832 provides clean, quiet air to the engine 104 to ensure combustion efficiency. An exhaust unit 833 processes and discharges the high-temperature exhaust gases from the engine 104 combustion process while reducing noise pollution.

[0250] In one embodiment, the hybrid fracturing system further includes a control unit 84, which is electrically connected to the first power unit 71, the second power unit 72, and the auxiliary unit 83, respectively.

[0251] Specifically, the control unit 84 includes a battery power monitor, a plunger pump torque monitor, a controller, and a working mode switcher. The battery power monitor is used to monitor the battery's charge status in real time to ensure a stable power supply. The plunger pump torque monitor is used to monitor the plunger pump's operating status to prevent overload. The controller is responsible for receiving and processing various operating data. The working mode switcher controls flexible switching between pure electric drive, fuel drive, or hybrid drive modes.

[0252] Referring to Figures 8 and 9, which are schematic diagrams showing the layout of the first transport device 87 and the second transport device 98 provided in one embodiment of this application, respectively. In this embodiment, a hybrid power fracturing device is also provided, including the hybrid power fracturing system described above. The hybrid power fracturing device further includes the first transport device 87 and the second transport device 98.

[0253] Specifically, the first transport equipment 87 integrates a first power unit 71, an auxiliary unit 83, a control unit 84, a generator 116, and an electric motor 721, forming a complete operating unit module with power generation capability. Specifically, the engine 104 in the first power unit 71 is mounted on the first transport equipment 87, the transfer case 126 is located to one side of the engine 104, the fracturing equipment 76 is located on the side of the transfer case 126 away from the engine 104, the generator 116 is also located on the side of the transfer case 126 away from the engine 104, and the electric motor 721 is located on the side of the generator 116 away from the transfer case 126 and below the fracturing equipment 76. The ventilation unit 834 in the auxiliary unit 83 is located above the engine 104, the intake unit 832 is located to the left of the ventilation unit 834, and the exhaust unit is located to the right of the ventilation unit 834.

[0254] Furthermore, the second transport device 98 includes an energy storage unit 724 and a frequency converter 114 for storing electrical energy and regulating power transmission. The energy storage unit 724 comprises a battery 108, a combiner cabinet 110, and a converter 112 arranged horizontally in sequence on the second transport device 98, with the frequency converter 114 positioned to the right of the converter 112. The generator 116 on the first transport device 87 is connected to both the energy storage unit 724 and the frequency converter 114 on the second transport device 98. This allows the electrical energy generated by the generator 116 to be regulated by the frequency converter 114 to power the motor 721, or the electrical energy generated by the generator 116 to be stored in the energy storage unit 724, or the energy storage unit 724 to power the motor 721 via the frequency converter 114.

[0255] In this embodiment, the first transport equipment 87 and the second transport equipment 98 can be transport vehicles such as chassis vehicles or ships, while the first power unit 71 and the second power unit 72 are respectively installed on the two transport equipment to facilitate the rapid transfer of the fracturing system between well sites, thereby shortening the resumption time.

[0256] In one embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments.

[0257] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0258] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0259] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0260] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0261] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A driving method applied to a driving system; The drive system includes an engine, an electric motor, a battery, and a drive pump; The drive pump is connected to both the engine and the motor, and the motor is connected to the battery; the method includes: If the current torque requirement of the drive pump meets the hybrid drive conditions, obtain the current charge level of the battery. Based on the current torque demand and the current battery level, determine the target driving strategy; According to the target driving strategy, the driving pump is driven to operate; The target drive strategy is used to indicate the operating mode of the engine and / or the electric motor to match the current torque demand of the drive pump.

2. The method according to claim 1, characterized in that, The method further includes: If the current torque demand does not meet the hybrid drive conditions, the engine or the motor is instructed to enter the working state to drive the drive pump.

3. The method according to claim 2, characterized in that, When the current torque demand does not meet the hybrid drive conditions, the method of instructing the engine or the motor to enter the working state includes: When the current torque demand is greater than the first power demand threshold, it is determined that the current torque demand does not meet the hybrid drive conditions, and the engine is instructed to transmit the output power to the drive pump through the transfer case; The transfer case is connected to the engine via a first transmission device and to the drive pump via a second transmission device.

4. The method according to claim 3, characterized in that, When the current torque demand does not meet the hybrid drive conditions, the method of instructing the engine or the motor to enter the working state includes: When the current torque demand is less than the second power demand threshold, it is determined that the current torque demand does not meet the hybrid drive conditions, and the battery is instructed to output electrical energy to the motor through the motor control circuit; the second power demand threshold is less than the first power demand threshold. The motor control circuit includes a combiner cabinet, a converter, and a frequency converter; the frequency converter is electrically connected to the converter, the motor, and the generator respectively; the converter is connected to the battery through the combiner cabinet; the generator is electrically connected to the converter; the motor is connected to the drive pump through a third transmission device, and the generator is connected to the transfer case through a fourth transmission device.

5. The method according to claim 4, characterized in that, The determination of the target driving strategy based on the current torque demand and the current battery level includes: When the current torque demand falls within the first hybrid torque demand range and the battery is determined to be in a depleted state based on the current charge level, the target drive strategy is determined to be that the engine transmits a portion of the output power to the drive pump through the second transmission device via the transfer case. When the current torque demand falls within the second hybrid torque demand range, and the battery is determined to be in a non-fed state based on the current charge level, the target drive strategy is determined as follows: the engine transmits the output power to the drive pump through the first transmission device, the transfer case, and the second transmission device, and the battery outputs electrical energy to the motor through the motor control circuit so that the motor transmits the output power to the drive pump through the third transmission device; Wherein, the upper limit of the first hybrid torque demand range is less than the lower limit of the second hybrid torque demand range.

6. The method according to claim 5, characterized in that, The method further includes: When the current torque demand falls within the first hybrid torque demand range, and the battery is determined to be in a depleted state based on the current charge level, the engine is instructed to transmit another portion of the output power to the generator through the transfer case, so that the generator can charge the battery through the inverter and the combiner cabinet.

7. The method according to claim 4, characterized in that, The determination of the target driving strategy based on the current torque demand and the current battery level includes: When the current torque demand falls within the third hybrid torque demand range, and the battery is determined to be in a non-fed state based on the current charge level, the target drive strategy is determined as follows: the engine transmits output power to the generator through the transfer case, and the battery outputs electrical energy to the motor through the motor control circuit, so as to jointly drive the drive pump to work. When the current torque demand falls into the fourth hybrid torque demand range and the battery is determined to be in a depleted state based on the current charge level, the target drive strategy is determined to be that the battery outputs electrical energy to the motor through the motor control circuit to drive the drive pump to work. The upper limit of the fourth hybrid torque demand range is less than the lower limit of the third hybrid torque demand range.

8. The method according to claim 7, characterized in that, The method further includes: When the current torque demand falls within the fourth hybrid torque demand range and the battery is determined to be in a depleted state based on the current charge level, the engine is instructed to transmit the output power to the generator through the first transmission device and the transfer case, so that the generator can charge the battery through the inverter and the combiner cabinet.

9. The method according to claim 7, characterized in that, The determination of the target driving strategy based on the current torque demand and the current battery level includes: When the current torque demand falls within the fourth hybrid torque demand range, and the battery is determined to be in a severely depleted state based on the current battery level, the target drive strategy is determined as follows: the engine transmits the output power to the generator through the first transmission device and the transfer case; the generator then processes a portion of the generated power through the frequency converter and outputs it to the motor to drive the drive pump.

10. The method according to claim 9, characterized in that, The method further includes: When the current torque demand falls within the fourth hybrid torque demand range, and the battery is determined to be in a severely depleted state based on the current power level, the generator will charge the battery with another portion of its power output through the converter and the combiner cabinet.

11. A drive device, applied to a drive system; The drive system includes an engine, a motor, a battery, and a drive pump; the drive pump is connected to both the engine and the motor, and the motor is connected to the battery; the device includes: The power information acquisition module is used to acquire the current power of the battery when the current torque demand of the drive pump meets the hybrid drive conditions. The strategy determination module is used to determine the target driving strategy based on the current torque demand and the current battery level. The strategy execution module is used to drive the drive pump to operate according to the target drive strategy; The target drive strategy is used to indicate the operating mode of the engine and / or the electric motor to match the current torque demand of the drive pump.

12. A drive system comprising an engine, an electric motor, a battery, a drive pump, and a controller; The drive pump is connected to the engine and the motor respectively; the motor is connected to the battery; the controller is connected to the engine, the motor, the battery and the drive pump respectively. The controller is used to perform the steps of the driving method as described in any one of claims 1 to 8.

13. The system according to claim 11, characterized in that, The system also includes a transfer case, a first transmission device, a second transmission device, a third transmission device, a fourth transmission device, a generator, and a motor control circuit; the motor control circuit includes a frequency converter, a converter, and a combiner cabinet. The transfer case is connected to the engine via the first transmission device and to the drive pump via the second transmission device; the frequency converter is electrically connected to the inverter, the motor, and the generator respectively; the inverter is connected to the battery via the combiner cabinet; the generator is electrically connected to the inverter; the motor is connected to the drive pump via the third transmission device, and the generator is connected to the transfer case via the fourth transmission device.

14. An oilfield device comprising the drive system as described in claim 12 or 13.

15. A hybrid power fracturing system, comprising: The first power unit includes an engine and a transfer case. The transfer case is located on one side of the engine. The input end of the transfer case is connected to the engine through a first power transmission device. The output end of the transfer case includes a first output shaft and a second output shaft. The first output shaft drives the fracturing equipment through the second power transmission device. The second power unit includes a power generation unit and a motor. The input end of the power generation unit is connected to the second output shaft through a fourth power transmission device, and the output end of the power generation unit is connected to the motor. The motor drives the fracturing equipment through a third power transmission device.

16. The hybrid fracturing system according to claim 15, characterized in that, The power generation unit includes a generator and a frequency converter. The frequency converter is located between the generator and the motor. The input end of the generator is connected to the second output shaft through a fourth power transmission device. The output end of the generator is connected to the frequency converter. The frequency converter is connected to the motor.

17. The hybrid fracturing system according to claim 16, characterized in that, The second power unit also includes an energy storage unit disposed on one side of the frequency converter, and the energy storage unit is connected to the frequency converter.

18. The hybrid fracturing system according to claim 17, characterized in that, The energy storage unit includes a battery, a combiner cabinet, and a converter arranged in sequence. The battery is connected to the combiner cabinet, the combiner cabinet is connected to the converter, and the converter is unidirectionally connected to the frequency converter.

19. The hybrid fracturing system according to claim 18, characterized in that, The generator's output terminal is connected to the converter, the converter is bidirectionally connected to the combiner cabinet, and the combiner cabinet is bidirectionally connected to the battery.

20. The hybrid fracturing system according to claim 19, characterized in that, The generator's output terminals include a first output terminal and a second output terminal spaced apart. The first output terminal is connected to the frequency converter, and the second output terminal is connected to the converter.

21. The hybrid fracturing system according to any one of claims 15-20, characterized in that, It also includes an auxiliary unit disposed above or below the first power unit, the auxiliary unit including a lubrication unit disposed below the engine, for lubricating the first power unit and the second power unit.

22. The hybrid fracturing system according to claim 21, characterized in that, The auxiliary unit also includes an intake unit, an exhaust unit, and a ventilation unit. The ventilation unit is located above the engine for cooling the engine. The intake unit is located on one side of the ventilation unit for absorbing air. The exhaust unit is located on the other side of the ventilation unit and between the engine and the transfer case for discharging exhaust gases.

23. The hybrid fracturing system according to claim 21, characterized in that, It also includes a control unit, which is located on one side of the first power unit and is electrically connected to the first power unit, the second power unit and the auxiliary unit respectively.

24. A hybrid power fracturing device, comprising the hybrid power fracturing system as described in any one of claims 15-23; The hybrid fracturing equipment also includes a first transport device and a second transport device. The first transport device includes a first power unit, an auxiliary unit, a control unit, a generator, and an electric motor. The second transport device includes an energy storage unit and a frequency converter.

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