Well site operation system

Abstract

The invention provides a well site operation system which comprises a loading system, a power generation system, an energy storage system, a load system and a control system are arranged on the loading system, and the load system comprises at least one main motor device and an execution assembly. The energy storage system or the power generation system can independently supply power to the load system, or the energy storage system and the power generation system simultaneously supply power to the load system, or the power generation system independently supplies power to the load system and charges the energy storage system. The embodiment of the invention can provide multiple power supply modes based on the power supply device, is suitable for different operation areas and different fracturing well sites, and meets different operation environments with grid power, without grid power, with gas source, without gas source and the like.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of well site operation devices, and in particular, to a well site operation system. BACKGROUND

[0002] At present, the domestic mixed traditional operation mainly adopts the following three ways to drive the mixed equipment for operation: one is to drive the suction centrifugal pump, discharge centrifugal pump, jet centrifugal pump, mixer and additive pump, and dry powder conveyor by the engine to drive the gear box or power take-off to carry out liquid mixing, and then supply the downstream equipment to realize the fracturing operation. Such equipment has problems of high production cost, high maintenance cost and high noise; the second is that the engine drives the hydraulic system, and the hydraulic system drives the liquid suction, mixing and discharge operation. Such equipment has problems of low efficiency of the hydraulic system, aging and oil leakage of the hydraulic oil pipe. The third is the external well site power supply mode to drive the electric drive mixing equipment currently used in the market, but due to the imperfect well site power supply, a special rectifier skid needs to be equipped, and it can only be used in a single well site, which has poor adaptability and cannot cover the domestic and foreign well site mixing construction conditions. SUMMARY

[0003] Therefore, the present disclosure aims to provide a well site operation system to solve the above technical problems in the prior art.

[0004] The present disclosure provides a well site operation system, which comprises a loading system, wherein a power generation system, an energy storage system, a load system and a control system are arranged on the loading system, the load system comprises at least one main motor device and an execution assembly, the energy storage system or the power generation system can independently supply power to the load system, or the energy storage system and the power generation system can simultaneously supply power to the load system, or the power generation system can independently supply power to the load system and charge the energy storage system.

[0005] In some embodiments, when the execution assembly is multiple, the execution assembly is configured with a corresponding motor.

[0006] In some embodiments, the main motor device comprises at least one motor, and the motor is an axial flux motor or a radial flux motor or a reluctance motor.

[0007] In some embodiments, an external power supply system is further included, and the external power supply system is used to supply power to the load system by an external power source.

[0008] In some embodiments, the external power supply system comprises at least one of a power distribution device, a voltage conversion device, a frequency conversion and voltage conversion device, and a variable power distribution device.

[0009] In some embodiments, the control system comprises at least a power supply control device, a whole machine control device and a charging control device, the power supply control device is connected with the power generation system and / or the energy storage system and / or the external power supply system; the whole machine control device is used to control the main motor device and / or the execution assembly in the load system; the charging control device is connected with the external power supply system or the power generation system to charge the energy storage system.

[0010] In some embodiments, the power supply control device comprises at least one of a parallel connection module, a rectifier module, a direct current conversion module and a direct current bus module, and the power supply control device comprises at least a current limiting module and a rectifier module.

[0011] In some embodiments, a heat dissipation system is further included, which is used to provide heat dissipation for the energy storage system and / or the power generation system and / or the load system.

[0012] In some embodiments, the load system adopts the form of skid-mounted or vehicle-mounted or semi-trailer-mounted.

[0013] In some embodiments, an auxiliary motor device is further included, which is connected with the power generation system and / or the energy storage system.

[0014] The embodiments of the present disclosure are based on the power supply device capable of providing multiple power supply modes, which are suitable for different working areas and different fracturing well sites, and meet different working environments such as with network power, without network power, with gas source and without gas source.

[0015] In order to make the above objectives, features and advantages of the present disclosure more obvious and easy to understand, the following preferred embodiments are specifically described below, and the accompanying drawings are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0016] In the drawings which are not necessarily drawn to scale, like reference numerals can be used to describe similar parts throughout the various illustrations. Like reference numerals having only difference between them can represent different instances of similar parts. The drawings illustrate generally by way of example, and not by way of limitation, various embodiments of the present disclosure. The same reference numerals in all the drawings can represent the same or similar elements or parts. Such embodiments are illustrative, and not intended to be exhaustive or limiting of the present device or method. The drawings herein are used to provide further understanding of the present disclosure, and constitute a part of the specification, the illustrative embodiments of the present disclosure and the description thereof serve to explain the present disclosure, and do not constitute improper limitation of the present disclosure. In the drawings:

[0017] Figure 1is a structural schematic diagram of an electrically-driven fracturing vehicle according to an embodiment of the present disclosure;

[0018] Figure 2 is a power supply mode schematic diagram of a well site operation system according to an embodiment of the present disclosure;

[0019] Figure 3 is a power supply mode schematic diagram of a well site operation system according to an embodiment of the present disclosure;

[0020] Figure 4 is a power supply mode schematic diagram of a well site operation system according to an embodiment of the present disclosure;

[0021] Figure 5 is a power supply mode schematic diagram of a well site operation system according to an embodiment of the present disclosure;

[0022] Figure 6 is a power supply structure schematic diagram of a well site operation system according to an embodiment of the present disclosure;

[0023] Figure 7 is a power supply structure schematic diagram of a well site operation system according to an embodiment of the present disclosure;

[0024] Figure 8 is a power supply structure schematic diagram of a well site operation system according to an embodiment of the present disclosure;

[0025] Figure 9 is a power supply structure schematic diagram of a well site operation system according to an embodiment of the present disclosure;

[0026] Figure 10 is a power supply structure schematic diagram of a well site operation system according to an embodiment of the present disclosure;

[0027] Figure 11 is a power supply structure schematic diagram of a well site operation system according to an embodiment of the present disclosure;

[0028] Figure 12 is a structural schematic diagram of an electrically-driven fracturing vehicle according to an embodiment of the present disclosure;

[0029] Figure 13 is a structural schematic diagram of an electrically-driven fracturing vehicle according to an embodiment of the present disclosure;

[0030] Figure 14 is a connection schematic diagram of a gear box in an electrically-driven fracturing vehicle according to an embodiment of the present disclosure;

[0031] Figure 15 is a connection schematic diagram of a gear box in an electrically-driven fracturing vehicle according to an embodiment of the present disclosure;

[0032] Figure 16 is a connection schematic diagram of a gear box in an electrically-driven fracturing vehicle according to an embodiment of the present disclosure;

[0033] Figure 17 This is one of the structural schematic diagrams of the well site operation system according to an embodiment of the present disclosure;

[0034] Figure 18 This is a second schematic diagram of the structure of the well site operation system according to an embodiment of this disclosure;

[0035] Figure 19 This is a schematic diagram of heat dissipation in the well site operation system according to an embodiment of the present disclosure;

[0036] Figure 20 This is the third schematic diagram of the structure of the well site operation system according to an embodiment of this disclosure;

[0037] Figure 21 This is the fourth schematic diagram of the structure of the well site operation system according to an embodiment of this disclosure;

[0038] Figure 22 This is the fifth schematic diagram of the structure of the well site operation system according to an embodiment of this disclosure;

[0039] Figure 23 This is the sixth schematic diagram of the structure of the well site operation system according to an embodiment of this disclosure;

[0040] Figure 24 This is the seventh schematic diagram of the structure of the well site operation system according to an embodiment of the present disclosure;

[0041] Figure 25 This is the eighth schematic diagram of the structure of the well site operation system according to an embodiment of the present disclosure;

[0042] Figure 26 This is diagram nine of the structural diagrams of the well site operation system according to an embodiment of this disclosure;

[0043] Figure 27 This is a schematic diagram of the structure of the well site operation system according to an embodiment of the present disclosure;

[0044] Figure 28 This is a simplified diagram of the power supply method in the well site operation system according to an embodiment of this disclosure;

[0045] Figure 29 This is the seventh schematic diagram of the power supply structure in the well site operation system according to an embodiment of this disclosure;

[0046] Figure 30 This is the eighth schematic diagram of the power supply structure in the well site operation system according to an embodiment of this disclosure;

[0047] Figure 31 This is a simplified diagram of the power supply method in the well site operation system according to an embodiment of this disclosure;

[0048] Figure 32 This is diagram nine of the power supply structure diagrams in the well site operation system according to an embodiment of this disclosure;

[0049] Figure 33 FIG. 3 is a schematic diagram of a power supply process in a well site operation system according to an embodiment of the present disclosure;

[0050] Figure 34 FIG. 5 is a simplified diagram of a power supply mode in a well site operation system according to an embodiment of the present disclosure;

[0051] Figure 35 FIG. 7 is a schematic diagram of a power supply structure in a well site operation system according to an embodiment of the present disclosure;

[0052] Figure 36 FIG. 9 is a schematic diagram of a power supply process in a well site operation system according to an embodiment of the present disclosure;

[0053] Figure 37 FIG. 11 is a simplified diagram of a power supply mode in a well site operation system according to an embodiment of the present disclosure;

[0054] Figure 38 FIG. 13 is a schematic diagram of a power supply structure in a well site operation system according to an embodiment of the present disclosure;

[0055] Figure 39 FIG. 15 is a schematic diagram of a power supply process in a well site operation system according to an embodiment of the present disclosure;

[0056] Figure 40 FIG. 17 is a schematic diagram of a power supply structure in a well site operation system according to an embodiment of the present disclosure;

[0057] Figure 41 FIG. 19 is a schematic diagram of a power supply structure in a well site operation system according to an embodiment of the present disclosure;

[0058] Figure 42 FIG. 21 is a schematic diagram of a power supply structure in a well site operation system according to an embodiment of the present disclosure;

[0059] Figure 43 FIG. 23 is a schematic diagram of a power supply structure in a well site operation system according to an embodiment of the present disclosure;

[0060] Figure 44 FIG. 25 is a schematic diagram of a motor connection in a well site operation system according to an embodiment of the present disclosure;

[0061] Figure 45 FIG. 27 is a schematic diagram of a motor connection in a well site operation system according to an embodiment of the present disclosure;

[0062] Figure 46 FIG. 29 is a schematic diagram of a motor connection in a well site operation system according to an embodiment of the present disclosure;

[0063] Figure 47 FIG. 31 is a schematic diagram of a motor connection in a well site operation system according to an embodiment of the present disclosure;

[0064] Figure 48Figure 5 is a schematic diagram of a motor connection in a wellsite operation system according to an embodiment of the present disclosure;

[0065] Figure 49 Figure 6 is a schematic diagram of an existing motor arrangement;

[0066] Figure 50 Figure 7 is a schematic diagram of another existing motor arrangement;

[0067] Figure 51 Figure 8 is a schematic diagram of a third existing motor arrangement;

[0068] Figure 52 Figure 9 is a schematic diagram of a first motor arrangement in a wellsite operation system according to an embodiment of the present disclosure;

[0069] Figure 53 Figure 10 is a schematic diagram of a second motor arrangement in a wellsite operation system according to an embodiment of the present disclosure;

[0070] Figure 54 Figure 11 is a schematic diagram of a third motor arrangement in a wellsite operation system according to an embodiment of the present disclosure;

[0071] Figure 55 Figure 12 is a schematic diagram of a fourth motor arrangement in a wellsite operation system according to an embodiment of the present disclosure;

[0072] Figure 56 Figure 13 is a schematic diagram of a fifth motor arrangement in a wellsite operation system according to an embodiment of the present disclosure;

[0073] Figure 57 Figure 14 is a schematic diagram of a sixth motor arrangement in a wellsite operation system according to an embodiment of the present disclosure;

[0074] Figure 58 Figure 15 is a schematic diagram of a first nitrogen generation system arrangement in a wellsite operation system according to an embodiment of the present disclosure;

[0075] Figure 59 Figure 16 is a schematic diagram of a second nitrogen generation system arrangement in a wellsite operation system according to an embodiment of the present disclosure.

[0076] In the above drawings, the following reference signs apply:

[0077] 100 - power supply device; 101 - vehicle body; 102 - main motor system; 102a - motor; 103 - fracturing pump; 104 - transmission shaft; 105 - auxiliary motor system; 106 - frequency conversion device; 107 - heat dissipation system; 108 - power generation system; 109 - energy storage system; 110 - power supply control device; 111 - low-voltage cable; 112 - high-voltage cable; 113 - gear box; 113a - output end; 114 - 10KV grid power; 115 - 10KV power supply cable; 116 - external power supply system; 117 - power distribution device; 118 - voltage conversion device; 119 - 35KV grid power; 120 - 35KV cable; 121 - voltage and power distribution device; 122 - voltage and frequency conversion device; 123 - high-voltage alternating current cable; 124 - gas power generation device; 125 - control system; 200 - electric drive fracturing vehicle.

[0078] 1 - chassis vehicle; 1a - self-contained battery pack; 2 - power generation system; 3 - control system; 31 - power supply control device; 311 - parallel operation module; 312 - rectifier module; 313 - direct current conversion module; 314 - direct current bus module; 32 - whole machine control device; 33 - charging control device; 4 - heat dissipation system; 41 - cooling liquid circulating pump; 42 - radiator; 43 - cold water system; 5 - energy storage system; 51 - battery pack; 6 - external power supply system; 61 - cable; 7 - jacking frame; 8 - load system; 11 - suction centrifugal pump; 12 - discharge centrifugal pump; 13 - jet centrifugal pump; 131 - jet manifold; 14 - additive pump; 15 - agitator; 16 - dry powder conveyor; 161 - dry powder tank; 17 - sand conveying auger; 18 - liquid additive pump.

[0079] 80 - motor; 81 - connecting device; 82 - execution assembly; 83 - speed changing device; 201 - compression unit; 2011 - air compressor; 2012 - compressor; 202 - axial flux motor; 203 - transmission device; 204 - reversing device.

[0080] 300 - nitrogen generation device; 400 - vehicle body; 500 - electric drive nitrogen generation assembly; 501 - first axial flux motor; 502 - second axial flux motor; 600 - skid body. DETAILED DESCRIPTION

[0081] In the following, specific embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, but not as a limitation of the present disclosure.

[0082] It should be understood that various modifications can be made to the embodiments disclosed herein. Therefore, the above description should not be regarded as limiting, but only as an example of the embodiments. Those skilled in the art will think of other modifications within the scope and spirit of the present disclosure.

[0083] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and, together with the general description of the disclosure given above, and the detailed description of the embodiments given below, serve to explain the principles of the present disclosure.

[0084] These and other characteristics of the present disclosure will become apparent from the following description and the associated drawings, wherein:

[0085] It should also be understood that, although the present disclosure has been described with reference to certain specific embodiments, many other embodiments of the present disclosure will be apparent to those skilled in the art in view of this description, and will be within the scope of the following claims, as interpreted in light of the retainable doctrine of equivalents.

[0086] The above and other aspects, features, and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which:

[0087] Specific embodiments of the present disclosure will be described hereinafter with reference to the accompanying drawings; however, these are merely specific embodiments of the present disclosure, and the present disclosure can be implemented in many different ways. Well-known and / or repetitive functions and structures are not described in detail to avoid obscuring the present disclosure with unnecessary or redundant descriptions. Therefore, specific structural and functional details disclosed herein are not intended to limit, but merely to serve as bases for the claims and a representative basis for teaching one skilled in the art to use the present disclosure in substantially any appropriate detailed structure.

[0088] It is to be understood that the terms "first", "second", and the like, used in the description and the claims of this disclosure, are used to differentiate between similar objects, and are not necessarily used to describe a particular sequential or chronological order. It is to be understood that the use of the terms so construed can be interchanged, under appropriate circumstances, to describe the embodiments of the present disclosure as taught herein. Furthermore, the terms "comprise" and "have," and variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, product, or apparatus that comprises a list of steps or units is not necessarily limited to those steps or units, but can include other steps or units not expressly listed or inherent to such process, method, product, or apparatus.

[0089] The present specification can use the phrases "in an embodiment," "in another embodiment," "in yet another embodiment," or "in at least one embodiment," which can refer to one or more embodiments of the present disclosure.

[0090] The present disclosure provides a well site operation system which can realize fracturing, mixing, sand mixing and other operations at the well site, and can also realize nitrogen making operation in specific scenarios. The well site operation system disclosed in the present disclosure comprises a loading system, wherein a load system and a control system are arranged on the loading system, and the load system is powered by, for example, commercial power supply, network power supply or other power supply devices under the action of the control system.

[0091] The load system comprises at least one motor, a frequency conversion device and an electrically driven execution assembly. The execution assembly is different for different operation types such as fracturing, mixing, sand mixing and the like. For example, when the load system is used for fracturing operation, the execution assembly is a plunger pump, and can also be a gear pump and related accessories; when the load system is used for mixing operation, the execution assembly comprises various centrifugal pumps, chemical additive pumps, dry powder conveyors, mixers and other actuators; when the load system is used for sand mixing operation, the execution assembly comprises various centrifugal pumps, liquid additive pumps, mixers, sand conveying augers and other actuators.

[0092] Specifically, the centrifugal pump mentioned above comprises, for example, a suction centrifugal pump (used for mixing and sand mixing operation), a discharge centrifugal pump (used for mixing and sand mixing operation), a jet centrifugal pump (used for mixing operation) and the like. In the mixing operation, clean water is conveyed into a mixing tank by the suction centrifugal pump, mixed with guar gum powder, dry powder polymer and chemicals in the mixing tank, and finally conveyed into a downstream liquid storage tank or sand mixing equipment after being pressurized by the discharge centrifugal pump; in the sand mixing operation, the main function of the suction centrifugal pump can be to provide transmission power for, for example, clean water to ensure the normal flow of fluid in the pipeline into the mixing tank; the discharge centrifugal pump can be used to pressurize and discharge the mixed sand-carrying fluid into the downstream equipment, thereby finally realizing fracturing operation.

[0093] When the execution assembly in the load system is more, the electrically driven execution assembly is configured with a corresponding motor. Specifically, the motor drives corresponding centrifugal pumps, chemical additive pumps, dry powder conveyors, mixers and other actuators. Each execution assembly is corresponding to a separate motor, for example, a suction centrifugal pump motor, a discharge centrifugal pump motor, a mixer motor, a sand conveying auger motor, a dry additive pump motor and a liquid additive pump motor. Each motor is controlled by a separate motor controller, and each motor can also be speed-controlled by a frequency conversion device.

[0094] In the embodiment, the motor corresponding to the execution assembly is an axial flux motor or a radial flux motor or a reluctance motor. Preferably, the axial flux motor can shorten the size of the load system.

[0095] In addition, the load system further comprises a low-pressure manifold and other supporting components, for example, the low-pressure manifold is used to deliver clean water into the mixing tank for mixing operation, and / or the mixed liquid is discharged to the downstream fracturing equipment after being pressurized.

[0096] Further, in the present disclosure, the loading system in the well site operation system can be in the form of skid-mounted or truck-mounted or semi-trailer-mounted. When the loading system is in the form of skid-mounted, the loading system comprises at least one skid, and the load system, the control system, etc. are arranged in the skid for transportation.

[0097] When the loading system is in the form of truck-mounted or semi-trailer-mounted, the loading system comprises at least one vehicle body, which can be a chassis vehicle driven by different energy sources, such as an electrically driven chassis vehicle, a diesel driven chassis vehicle, a hydrogen energy driven chassis vehicle, a methanol fuel driven chassis vehicle, etc., wherein the electrically driven chassis vehicle has a battery pack, and the load system, the control system, etc. are arranged on the vehicle body. When the electrically driven chassis vehicle is used, an auxiliary motor system can also be arranged on the vehicle body.

[0098] In addition to the power supply to the load system by, for example, municipal power supply, network power, in another embodiment, the well site operation system further comprises a power generation system and an energy storage system, which are arranged on the loading system and used to supply power to the load system, and the loading system is used to carry the power generation system, the energy storage system, the load system, the control system, etc. to facilitate the convenient transfer operation.

[0099] The power generation system is connected with the energy storage system and the load system through a cable to supply power to the energy storage system and the load system; the energy storage system is connected with the load system, which can also provide power to the load system to drive the load system, and the load system here can be used for fracturing, mixing or sand mixing operation.

[0100] Specifically, the energy storage system is a system capable of storing and releasing electric energy when needed, which at least comprises a battery pack, a battery management device, etc., wherein the battery pack adopts a modular design, for example, composed of a plurality of batteries in series and parallel connection. The battery management device measures the basic parameters of the battery pack such as voltage, current, temperature, etc., prevents overcharging and overdischarging of the battery pack, in addition, can calculate and analyze the remaining capacity and battery health state of the battery pack, and timely report abnormal information, prolong the service life of the battery pack.

[0101] In addition to the battery pack mentioned above, the energy storage system can also be equipped with a supercapacitor, thus replacing the battery pack. The supercapacitor has the characteristics of high current and fast charging and discharging, which can realize the power impact compensation of the load system and improve the system stability.

[0102] Furthermore, the power generation system includes at least a generator set, wherein the generator set is used to convert mechanical energy into electrical energy. In another embodiment, the power generation system further includes a drive device for driving the generator set. The drive device may be, for example, a diesel engine, a natural gas engine, etc., which converts the energy from fuel combustion into mechanical energy and transmits it to the generator set, which then converts it into electrical energy. In addition, when the well site operation system is, for example, vehicle-mounted, the generator set can also be driven by taking power from the chassis vehicle.

[0103] In the well site operation system disclosed herein, the control system enables control of the power generation system, the energy storage system, and the load system. For example, the control system can adjust the power supply strategy based on the depth of power consumption, thereby achieving power generation and energy storage functions and selectively supplying power to the load system. The well site operation system of this disclosure features highly integrated and flexible internal equipment that is easy to relocate, allowing operation in scenarios with or without a power grid at the well site.

[0104] Specifically, the control system can be fixed on a skid or chassis, and can select the power supply mode, monitor the power supply operation status, and control the load system, such as controlling the operating pressure and displacement of the centrifugal pump according to the operation requirements.

[0105] The control system is used to control the supply of power to the load system through the mains power supply, grid power or other power supply devices. It includes at least a power supply control device, a whole machine control device and a charging control device. The power supply control device is connected to the mains power and / or grid power and / or the power generation system and / or the energy storage system to supply power to the load system.

[0106] like Figures 2 to 5 As shown, taking an electrically driven fracturing truck as an example, existing electrically driven fracturing trucks often integrate frequency converters, high-power main motors, plunger pumps, auxiliary systems, etc. Among them, the high-power main motors are heavy and large in size, resulting in heavy equipment and long overall dimensions, which do not meet the requirements for oilfield road transportation and well site use. Moreover, a failure of a single high-power main motor will cause the equipment to shut down, affecting fracturing operations. Furthermore, the auxiliary systems of existing electrically driven fracturing trucks are driven by a single motor, and a failure of this motor will also cause the equipment to shut down, affecting fracturing operations.

[0107] The electric fracturing truck in the present disclosure can be powered by an external power source or a battery pack of an energy storage system, or a combination of the two. When the external power supply is sufficient, the external power source is used independently, and when the external power supply is insufficient, the combination of the two is used. When the external power source fails, the battery pack is used independently to ensure that the equipment does not stop and avoid wellhead blockage. The battery pack here is charged by the external power source.

[0108] In addition, the electric fracturing truck can also be powered by an external power source or a chassis drive power source, or a combination of the two. The chassis drive power source can be in different forms depending on the chassis, such as an engine + generator form, or a separate generator or battery pack. When the external power supply is sufficient, the external power source is used independently, and when the external power supply is insufficient, the combination of the two is used. When the external power source fails, the chassis drive power source is used independently to ensure that the equipment does not stop and avoid wellhead blockage.

[0109] In addition, the electric fracturing truck can also be powered by an external power source or a chassis drive power source or a battery pack, or any two or all three of them. This power supply method can further improve the power supply power and the output power of the equipment, while further reducing the risk of equipment downtime. The battery pack here can be charged by the chassis drive power source or the external power source, or both.

[0110] Further, the power supply control device includes at least a parallel module, a rectifier module, a DC conversion module, a DC bus module, etc. Different modules are used through different power supply methods. The whole machine control device can control the electric motor or the execution component in the load system. The charging control device can be connected to the external power source or the power generation system to charge the energy storage system, which includes a current limiting module and a rectifier module.

[0111] Further, the power supply control device is used to provide start-up, shutdown, data measurement, data display, and fault protection functions for the drive device of the power generation system, as well as power measurement, power display, and power protection functions for the generator set of the power generation system. Specifically, the working parameters of each generator set during job power consumption can be detected to adjust the power supply strategy of the power generation system and the energy storage system through job power consumption, and the mutual interaction and control instruction execution between the generator sets and the power generation system and the energy storage system can be realized, and economic power supply can be selected when the well site operation system is operating.

[0112] Further, when the power supply condition of the well site meets the operation requirements, the well site operation system further comprises an external power supply system, through which external power supply such as commercial power / grid power can be used to drive the load system to operate. The external power supply system is a device that can convert high-voltage power of commercial power / grid power to required voltage, and at least includes power distribution devices, voltage conversion devices, frequency conversion and voltage conversion devices, and variable power distribution devices.

[0113] In addition, the well site operation system further comprises a heat dissipation system, which mainly provides heat dissipation for components such as the energy storage system, the power generation system, and the load system. For example, liquid cooling is used to achieve heat dissipation of internal components to maintain suitable temperature for operation of component devices. Of course, air cooling can also be selected.

[0114] Specifically, the heat dissipation system, for example, comprises circulating pipelines installed in the battery pack of the energy storage system, the motor of the load system, and the motor controller. When the energy storage system is cooled, the heat in the battery pack is carried out by circulating cooling liquid and then exchanged with an external cold water system. The cold water in the cold water system can be configured with additional water cooling devices, or can be cooled by using clean water used in the mixing operation. The clean water is provided by a pump in the water cooling device, so that the radiator does not need to be additionally configured with a power source, thereby reducing energy consumption. The heat dissipation system can also be used for heat dissipation of the power generation system, the load system, etc. based on similar heat dissipation methods. Preferably, a sensor is arranged inside, for example, the battery pack, the motor, the motor controller, etc. to detect temperature in real time. When the temperature exceeds a limited value, the circulating pipeline is started to cool by liquid, ensuring that the battery pack, the motor, the motor controller, etc. are within a suitable temperature range.

[0115] The energy storage system, the power generation system, and the external power supply system mentioned in the embodiment can cooperate with each other to drive the load system, thereby realizing operation in different scenarios. Specifically, for example, the power generation system and the energy storage system can meet the operation requirements of the well site under no charging condition by cooperating with the control system. During operation, the energy storage system and / or the power generation system can be discharged alone to drive the load system to operate, or the energy storage system and the power generation system can be discharged simultaneously to drive the load system to operate. In addition, the power generation system can be discharged to the load system while charging the energy storage system.

[0116] For another example, when the well site operation is in good charging condition, the well site operation requirements can be met by the energy storage system, the external power supply system and the control system, wherein during the operation, the energy storage system or the external power supply system can be discharged alone to drive the load system to operate, and the external power supply system can also discharge to the load system while charging the energy storage system.

[0117] In addition, the power generation system, the energy storage system, the load system, the external power supply system and the control system in the embodiment can be integrated or separately arranged, and the specific use mode can be adjusted according to the actual conditions. For example, the external power supply system is arranged separately, and the other systems are integrated, so that the external power supply system can be selected or not selected to participate in driving the load system to operate according to the power supply condition of the well site.

[0118] Based on the above, the present disclosure can provide a light electric drive fracturing vehicle to realize fracturing operation, which has small weight, small size, small turning radius, meets the domestic oil field road transportation requirements, has small footprint, meets the use of small well sites, is high in flexibility, saves time and improves efficiency during well site arrangement and site transfer operation, has low carbon emission, and meets the operation requirements of low carbon, environmental protection and high efficiency. The power supply device in the embodiment can provide multiple power supply modes, which is suitable for different operation areas and different fracturing well sites, and meets different operation environments such as network power, no network power, gas source and no gas source.

[0119] As shown in Figure 1 The well site operation system provided by the first embodiment of the present disclosure includes an electric drive fracturing vehicle, which includes a vehicle body 101 as a load system. The vehicle body 101 has a bearing and transportation function. The vehicle body 101 here can be a transportation part of a truck or a semi-trailer. The vehicle body 101 here has a transportation platform, which can be a bearing part behind the cab of the truck or a transportation platform of the semi-trailer.

[0120] The control system 125, the load system and a frequency conversion device 106 as an external power supply system are arranged on the vehicle body 101. The frequency conversion device 106 is used to receive external power supply. The load system at least includes a main motor system 102 and a fracturing pump 103. The frequency conversion device 106, the main motor system 102 and the fracturing pump 103 are installed in a predetermined order on the vehicle body 101, especially on the upper surface of the transportation platform.

[0121] The frequency conversion device 106 is located at the front of the vehicle body 101, and the main motor system 102 is located at the middle of the vehicle body 101. The frequency conversion device 106 is connected to the main motor system 102. The frequency conversion device 106 is provided with at least an external power supply quick plug interface, so as to realize quick connection of the external power supply.

[0122] The main motor system 102 can operate independently, for example, when the external power supply is high-voltage alternating current, the main motor system 102 is directly connected to the frequency conversion device 106 to drive the main motor system 102 to operate by the external power supply. In this embodiment, the frequency conversion device 106 specifically converts external high-voltage direct current into high-voltage alternating current, thereby providing power for the main motor system 102 and controlling the operation thereof.

[0123] Of course, when the external power supply meets the operating conditions of the motor 102, the motor 102 can be directly connected without the frequency conversion device 106, thereby providing power for the motor 102 and controlling the operation thereof.

[0124] In this embodiment, the main motor system 102 for driving the fracturing pump 103 includes at least one motor 102a, which is a three-phase asynchronous motor or a permanent magnet synchronous motor. In another embodiment, the motor 102a is a forced air cooling type motor, and can also be a liquid cooling type motor or an air cooling type motor.

[0125] Further, the fracturing pump 103 is arranged at the tail of the vehicle body 101, wherein the main motor system 102 is connected to the fracturing pump 103 through a transmission shaft 104, thereby providing power for the fracturing pump 103.

[0126] Further, the vehicle body 101 is further provided with a heat dissipation system 107, which is used for heat dissipation of, for example, the main motor system 102, the fracturing pump 103, etc., and is arranged, for example, between the motor 3 and the fracturing pump 103, and is preferably located at the upper part of the transmission shaft 104.

[0127] In addition, the vehicle body 101 is further provided with an auxiliary motor system 105, which can be arranged, for example, on the lower surface of the transportation platform. The auxiliary motor system 105 includes, for example, a first auxiliary motor for a lubrication system, a second auxiliary motor for a heat dissipation system, a third auxiliary motor for a heat dissipation fan in the main motor, etc. The various auxiliary motors in the auxiliary motor system 105 are radial flux motors, and can also be axial flux disc motors.

[0128] The electric drive fracturing vehicle has small weight and small size, meets road regulation requirements of the fracturing vehicle, has small floor area, and meets use in a small well site.

[0129] The above examples are only illustrative, and only describe examples of providing electric energy to the electric motor as a load system by an external power supply to drive the plunger pump to implement fracturing operations.

[0130] Taking the fracturing operation performed by the electric drive fracturing vehicle as an example, operations can be implemented in different operation environments such as with network power, without network power, with a gas source, and without a gas source through cooperation of different systems.

[0131] Further, the well site operation system further includes a power supply device 100. The power supply device 100 can be arranged on the electric drive fracturing vehicle or can not be arranged on the electric drive fracturing vehicle. The power supply device 100 can be connected with the frequency conversion device 106 on the electric drive fracturing vehicle, for example. The power supply device 100 can enable the fracturing pump 103 on the electric drive fracturing vehicle to perform fracturing operations in different scenarios. The power supply device 100 is configured to provide electric energy for the main electric motor system 102 and the auxiliary electric motor system 105.

[0132] Specifically, the power supply device 100 at least includes a power generation system 108, an energy storage system 109, a power supply control device 110, and a transmission cable. The transmission cable at least includes a high-voltage cable 112 and a low-voltage cable 111. The power generation system 108 and the energy storage system 109 can jointly work or independently work. The power supply control device 110 provides high-voltage power and low-voltage power for the electric drive fracturing vehicle. One end of the high-voltage cable 112 is connected with the power supply control device 110, and the other end is connected with the frequency conversion device 106, thereby providing high-voltage power for the main electric motor system 102. One end of the low-voltage cable 111 is connected with the power supply control device 110, and the other end is connected with the auxiliary electric motor system 105, thereby providing low-voltage power for the electric drive fracturing vehicle 200.

[0133] As shown in Figure 6 When the well site where the electric drive fracturing vehicle 200 is located has no network power and no gas source, the electric drive fracturing vehicle 200 can perform fracturing operations through the power supply device 100. The power supply device 100 is arranged in one-to-one correspondence with the electric drive fracturing vehicle 200. The power supply device 100 provides high-voltage direct-current power for the electric drive fracturing vehicle 200 through the high-voltage cable 112 and provides low-voltage alternating-current power for the electric drive fracturing vehicle 200 through the low-voltage cable 111.

[0134] Furthermore, the electric fracturing truck 200 can be connected to grid power of different specifications via, for example, an external power supply system, to supply power to the main motor system 102 via grid power. In this embodiment, the external power supply system 116 is used to supply grid power to different electric fracturing trucks. The external power supply system 116 is used to convert grid power into electrical energy for supply to the main motor system 102, etc., and to distribute it. The external power supply system 116 includes a power distribution device 117 and a transformer device 118. The transformer device 118 is used to convert grid power into high-voltage DC and low-voltage AC. The power distribution device 117 is used to distribute the converted high-voltage and low-voltage electricity into multiple paths, and to supply power to multiple electric fracturing trucks through the high-voltage cable 112 and the low-voltage cable 111 of each path.

[0135] For example, Figure 7 As shown, when the well site where the electric fracturing truck 200 is located has 10KV grid power but no gas source, it can be powered by 10KV grid power 114. The external power supply system includes a 10KV power supply cable 115, a transformer device 118, and a power distribution device 117. The transformer device 118 can convert the 10KV grid power into high voltage and low voltage. The power distribution device 117 can distribute the converted high voltage and low voltage into two or more paths, and provide power to multiple electric fracturing trucks through high voltage cable 112 and low voltage cable 111.

[0136] In another implementation, such as Figure 8 As shown, when the well site where the electric fracturing truck is located has 10KV grid power but no gas source, the 10KV grid power 114 can be used for power supply. The external power supply system includes a 10KV cable 115, a transformer and frequency converter 122, a high-voltage AC cable 123 and a low-voltage cable 111. The transformer and frequency converter 122 converts the 10KV power supply into high-voltage AC power supply. The high-voltage AC power supply is connected to the electric fracturing truck 200 through the high-voltage AC cable 123 to provide power to the fracturing pump of the electric fracturing truck 200.

[0137] In another embodiment, when the grid voltage is high, the external power supply system further includes a power distribution unit 121 to convert the higher-voltage grid power to a lower-voltage grid power. Figure 9As shown in FIG. 1, when the well site where the electric fracturing truck 200 is located has 35KV grid power but no gas source, 35KV grid power 119 is used to supply power to the electric fracturing truck, and the external power supply system includes 35KV cable 120, power distribution device 121, 10KV cable 115, voltage conversion device 118, and power distribution device 117. The power distribution device 121 converts 35KV power into 10KV power, thereby providing power for the electric fracturing truck.

[0138] As shown in FIG. 2, when the well site has 35KV grid power but no gas source, 35KV grid power 119 is used to supply power, and in another embodiment, the external power supply system includes 35KV cable 120, power distribution device 121, 10KV cable 115, voltage conversion and frequency conversion device 122, high-voltage AC cable 123, and low-voltage cable 111. The power distribution device 121 converts 35KV power into 10KV power, thereby providing power for the voltage conversion and frequency conversion device 122. The voltage conversion and frequency conversion device 122 converts high-voltage DC power into high-voltage AC power and low-voltage AC power, and then supplies power to the electric fracturing truck through the high-voltage AC cable 123 and the low-voltage cable 111. Figure 10 As shown in FIG. 3, when the well site has no grid power but has a gas source, a gas power generation device 124 is used as the power generation system to supply power, and the external power supply system includes 10KV cable 115, power distribution device 117, voltage conversion device 118, high-voltage cable 112, and low-voltage cable 111. The voltage conversion device 118 converts the power provided by the gas power generation device 124 into high-voltage power and low-voltage power. The power distribution device 117 can distribute the power into two or more paths, and the high-voltage cable 112 and the low-voltage cable 111 supply power to multiple electric fracturing trucks 200.

[0139] Figure 11 As shown in FIG. 4, in another embodiment of the electric fracturing truck, as shown in FIG. 5, and as shown in FIG. 6,

[0140] As shown in FIG. 4, in another embodiment of the electric fracturing truck, as shown in FIG. 5, and as shown in FIG. 6, Figure 12 Figure 13 ​​As shown, the main motor system 102 and the fracturing pump 103 are connected through a gear box 113, and the fracturing pump 103 is arranged at the tail of the vehicle body 101, and the fracturing pump 103 is connected with the gear box 113 through a connecting device 81, which can be a transmission shaft, a shaft coupling or the like. The main motor system 102 is arranged on the gear box 113 to drive the operation of the fracturing pump 103. The heat dissipation system can be arranged above the connecting device 81 to achieve heat dissipation. In addition, a control system 125 is arranged at the front of the vehicle body to control the operation of the main motor system 102, and an auxiliary motor system 105 is arranged below the vehicle body 101. In addition, the vehicle body 101 can also be provided with an energy storage system 109.

[0141] The main motor system 102 includes a plurality of motors 102a, and the plurality of motors 102a drive the operation of the fracturing pump 103 through the gear box 113. The motor 102a is an axial flux motor, which can be arranged on any side of the gear box 113 or on both sides. The plurality of motors can work partially or totally under the control of the control system 125 to avoid resource waste, and when one or more motors 102a fail, the remaining motors 102a can still drive the equipment to work at a reduced power to ensure that the equipment does not stop.

[0142] As shown in Figure 14 and Figure 15 Two or four motors 102a can be arranged on one side of the gear box 113, and the input end 113a of the gear box 113 is connected with the connecting device, and the motors can also be arranged on both sides of the gear box 113.

[0143] As shown in Figure 16 The motors 102a arranged on one side of the gear box 113 can be connected with the gear box 113 in series, which can increase the driving power in a limited space and improve the operation efficiency. In addition, when one motor 102a fails in the working condition that a plurality of motors 102a are connected in series, another motor 102a can still drive the fracturing pump to meet the low-power operation and ensure that the equipment does not stop.

[0144] In addition, the main motor system 102 can be connected with a speed changing device first, and then connected with the gear box 113, which can further improve the output torque of the main motor system 102 and improve the output power of the fracturing pump 103.

[0145] The patent provides a new energy electric drive fracturing vehicle, which is configured with multiple small power motors, has small weight, small size, and small turning radius, meets the domestic oil field road transportation requirements, has low equipment downtime risk, when one or several small power motors fail, the remaining small power motors can still drive the equipment to operate at low power, ensuring that the equipment does not stop; it has small floor area, meets the requirements of small well site use; it has high flexibility, saves time and improves efficiency during well site layout and transfer operation; it has low carbon emission, meets the requirements of low carbon, environmental protection and high efficiency.

[0146] The above examples are only illustrative, which only describe the example of providing electric energy to the motor as a load system to drive the plunger pump to realize fracturing operation. Taking the fracturing operation performed by the above electric drive fracturing vehicle as an example, different operations can be realized by the main motor system through the cooperation of different systems.

[0147] The second embodiment of the present disclosure provides a well site operation system, referring to Figures 17 to 22 , which is introduced by taking the load system for performing mixing operation as an example, as shown in Figure 17 , in a specific embodiment, the well site operation system for mixing operation includes a chassis vehicle 1, the chassis vehicle 1 here is an electric drive chassis vehicle, which has a battery pack itself, the chassis vehicle 1 is provided with a power generation system 2, a control system 3, a heat dissipation system 4 and a load system, in this embodiment, the power generation system 2 provides electric energy to the load system, wherein the control system 3 here includes power supply control device 31 and whole machine control device 32; the load system includes multiple execution components and corresponding motors (not shown), the execution components here are, for example, suction centrifugal pump 11, discharge centrifugal pump 12, jet centrifugal pump 13, additive pump 14, agitator 15, dry powder conveyor 16, etc. driven by motor, the agitator 15 here is arranged in the mixing tank, the dry powder conveyor 16 is arranged in the dry powder tank 161, and the jet centrifugal pump 13 is connected with the jet pipe manifold 131. The motor here drives the corresponding execution component to run through the connecting device, and the motor can be an axial flux motor or a radial flux motor, a reluctance motor, etc.

[0148] In addition, the heat dissipation system 4 here mainly provides heat dissipation for the power generation system 2, the load system, and components such as the motor, so as to realize heat dissipation of the components by water cooling, so as to maintain the appropriate temperature of the components during operation. In addition, the motor here can also be a forced air cooling motor to drive the execution component.

[0149] Preferably, for ease of arrangement on the chassis vehicle 1, the suction centrifugal pump 11, the discharge centrifugal pump 12, and the chemical addition pump 14 are, for example, located at the lower part of the chassis of the chassis vehicle 1, and the injection centrifugal pump 13 is located at the upper part of the chassis to connect with the injection manifold 131.

[0150] like Figure 18 As shown, based on the above implementation method, an energy storage system 5 is added to the well site operation system. In this implementation method, on the one hand, the power generation system 2 can be controlled to charge the energy storage system 5 independently, or the power generation system 2 can be controlled to charge the energy storage system 5 while supplying power to the load system; on the other hand, the energy storage system 5 can be controlled to discharge independently to provide power to the load system according to the actual power consumption of the operation, or the power generation system 2 can generate electricity to directly drive the operation of the load system, and the excess electricity can be used to charge the energy storage system 5; of course, the energy storage system 5 can also supply power to the load system together with the battery pack of the chassis vehicle 1.

[0151] Furthermore, the power supply control device 31 in the control system 3 can detect the operating parameters of the battery pack in the energy storage system 5 and the generator set in the power generation system 2, and control the power supply strategy of the generator set and the battery pack through the operating power consumption. This enables mutual interaction and control command execution between the power generation system 2 and the energy storage system 5, thereby allowing for the selection of economical power supply when the well site operation system is in operation.

[0152] The heat dissipation system 4 mentioned here mainly provides heat dissipation for components such as the energy storage system 5, the power generation system 2, and the motor in the load system. For example, the heat dissipation of the components is achieved by water cooling to maintain a suitable operating temperature for the components. In addition, the motor in the load system can also be an air-cooled motor to drive the execution component.

[0153] Furthermore, the heat dissipation system 4 can take various forms. In this embodiment, the battery pack in the energy storage system 5 generally includes multiple battery modules, with circulation pipes set between each battery module. Sensors installed inside the battery pack detect the internal temperature. For example, when the temperature exceeds a certain limit, the circulation pipes are activated to use liquid for heat dissipation, ensuring the battery pack remains within a suitable temperature range. To prevent water from directly entering the circulation pipes of the battery pack and causing blockage, an external water-cooled radiator can also be used.

[0154] like Figure 19As shown, specifically, the battery pack 51 of the energy storage system 5 is cooled using liquid cooling, and the heat dissipation system 4 includes a cooling liquid circulating pump 41, a radiator 42, and a cooling water system 43. A closed loop is formed between the battery pack 51, the cooling liquid circulating pump 41, and the radiator 42, and heat exchange is performed between the radiator 42 and the cooling water system 43. The cooling liquid circulating pump 41 circulates the cooling liquid between the inside of the battery pack 51 and the radiator 42, and the circulating cooling liquid carries away the heat in the battery pack 51 and then exchanges heat with the external cooling water system 43. In addition to the above-mentioned cooling solution for the battery pack, the electric motor in the load system and the corresponding electric motor controller can also use this heat dissipation solution. Of course, the cooling water in the cooling water system 43 can also be configured with an additional water cooling device, or can be cooled with clean water for mixing operation, and the clean water is provided by a centrifugal pump. In this way, the radiator does not need to be additionally configured with a power source, thereby reducing energy consumption.

[0155] As shown in FIG. 1, Figure 20 In another embodiment, when an electric drive chassis vehicle is used as the load system, the power generation system 2 can charge the energy storage system 5 and also charge the battery pack 1a of the electric drive chassis vehicle. The energy storage system 5 and the battery pack 1a of the electric drive chassis vehicle can charge each other. In this way, the power generation system 2 or the energy storage system 5 of the chassis vehicle can charge the battery pack 1a of the electric drive chassis vehicle, thereby solving the power anxiety problem of the electric drive chassis vehicle during driving.

[0156] Specifically, the energy storage system 5 can be used to provide power to the load system according to the actual power consumption of the operation, or the power generation system 2 can be used to generate power to directly drive the load system to operate, and the excess power can be used to charge the energy storage system 5. In addition, the energy storage system 5 and the battery pack 1a of the electric drive chassis vehicle can be used to supply power to the load system together. In this way, the power generation system 2 can supply power to the electric drive chassis vehicle in addition to supplying power to the energy storage system 5, thereby solving the power anxiety problem.

[0157] As shown in FIG. 1, Figure 21 In this embodiment, the load system is in the form of a skid, and the chassis vehicle 1 is replaced by a skid frame 7. The power generation system 2, the energy storage system 5, and the load system are all fixed on the skid frame 7. In addition, a lifting lug or a container corner fitting is arranged on the skid frame 7 to realize the transportation of the whole skid.

[0158] As shown in FIG. 1, Figure 22As shown, on the basis of the above embodiment, a separate external power supply system 6 can also be added, and when the well site power supply meets the operation conditions, the well site power supply can provide power for the load system in the skid rack 7 through the cable 61. Preferably, the external power supply system 6 here can be independently skid-mounted, that is, independently arranged on the skid rack, so that the external power supply system 6 can be selected or not selected to participate in driving the load system operation according to the power supply conditions of the well site.

[0159] Referring to Figures 23 to 27 , the load system here is used to perform sand mixing operations, and the loading mode of the well site operation system is similar to the mixing operation, for example, it can be in the form of a vehicle-mounted or skid-mounted, wherein, Figures 14-16 shows a vehicle-mounted form (arrangement see Figures 8-11 ), Figure 17 and Figure 18 shows a skid-mounted form (arrangement see Figure 12 and Figure 13 ), the load system, for example, includes a suction centrifugal pump 11, a discharge centrifugal pump 12, a liquid additive pump 18, a mixer 15, a dry powder conveyor 16, etc. driven by an electric motor, wherein the mixer 15 is arranged in the mixing tank, and the dry powder conveyor 16 is arranged in the dry powder tank 161. In addition, the load system also includes a sand conveying auger 17, which is, for example, arranged obliquely at the tail of the chassis vehicle 1.

[0160] In this embodiment, the well site operation system can be configured in one of the operation modes or realize any combination of multiple operation modes when performing the mixing operation through the cooperation of the energy storage system, the power generation system, the external power supply system, etc. Specifically:

[0161] In the first operation mode, as shown in Figure 28 and Figure 29 , for example, the load system can be directly powered by the energy storage system 3, specifically, the energy storage system 5 is charged by the external power supply through the charge control device 33 of the control system 3 before operation, and the energy storage system 5 is directly discharged to drive the load system during operation. Specifically, the alternating current from the input end of the charge control device 33 becomes direct current after passing through the current limiting module and the rectifier module of the charge control device 33, so as to power the energy storage system 5, wherein the power consumption of the load system is less than the discharge capacity of the energy storage system 5, and during operation, different electric motors in the load system drive, for example, various centrifugal pumps, additive pumps, mixers, dry powder conveyors, and other actuators, etc., and the rotational speed is adjusted by the corresponding electric motor controller, thereby realizing the preparation and transportation of the sand-carrying liquid.

[0162] In the second operation mode, as shown in Figure 30 , the power generation system 2 directly supplies power to the load system to drive the load system to operate, for example, a plurality of generator sets 21 can be connected to the parallel operation module 311 of the power supply control device 31 to supply power to the load system, and during operation, different motors in the load system drive, for example, centrifugal pumps, chemical pumps, mixers, dry powder conveyors and other actuators, etc., and the speed is adjusted by the corresponding motor controller, thereby realizing the preparation and delivery of the sand-carrying liquid.

[0163] In the third operation mode, as shown in Figure 31 and Figure 32 , the power generation system 2 and the energy storage system 5 can both supply power to the load system, and the power generation system 2 can also supply power to the energy storage system 5. Among them, the power generation system 2 can start or stop discharging according to the charging amount of the energy storage system 5, and during operation, the motors in the load system drive, for example, centrifugal pumps, chemical pumps, mixers, dry powder conveyors and other actuators, etc., and the speed is adjusted by the corresponding motor controller, thereby realizing the preparation and delivery of the sand-carrying liquid.

[0164] Specifically, the generator set 21 in the power generation system 2 is connected with the first rectifier module 312 of the power supply control device 31, and the first rectifier module 312 is connected with the DC bus module 314 of the power supply control device 31. The AC power generated by the generator set 21 is converted to DC power through the first rectifier module 312, and is supplied to the load system through the DC bus module 314. The battery pack 51 is connected with the DC bus module 314 through the DC conversion module 313 of the power supply control device 31, so that the load system is supplied with power through the DC conversion module 313. The power generation system 2 can also charge the battery pack 51, and the battery pack 51 can be charged through the charging pile. During operation, the motors in the load system drive, for example, centrifugal pumps, chemical pumps, mixers, dry powder conveyors and other actuators, etc., and the speed is adjusted by the corresponding motor controller, thereby realizing the preparation and delivery of the sand-carrying liquid.

[0165] As shown in Figure 33 , in the third operation mode, a plurality of power supply modes can be selected, so that whether the energy storage system meets the operation power consumption can be determined according to the operation power consumption:

[0166] 1. When the operation power consumption is less than the discharge capacity of the energy storage system, the battery pack 51 of the energy storage system 5 can be used to directly supply power to the load system for operation, and after the operation is completed, the energy storage system 5 can be charged;

[0167] 2. When the work power consumption is greater than the discharge capacity of the energy storage system, the power supply is realized according to the size relationship between the total power of the load system and the total power of the power generation system in the following ways:

[0168] (1) When the total power of the load system is less than the total power of the power generation system and the discharge depth of the energy storage system 5 does not reach the set value, the energy storage system 5 is discharged to supply power to the load system; when the discharge depth of the energy storage system 5 reaches the set value, the power generation system 2 is started, so that the power generation system 2 supplies power to the load system, and the excess power is used to charge the energy storage system 5; when the energy storage system 5 is fully charged, the power generation system 2 is controlled to stop, the energy storage system 5 is discharged to supply power to the load system, and the cycle is repeated.

[0169] (2) When the total power of the load system is less than the total power of the power generation system and the discharge depth of the energy storage system 5 reaches the set value, the power generation system 2 is started first, the power generation system 2 supplies power to the load system, and the excess power is used to charge the energy storage system 5; when the energy storage system 5 is fully charged, the power generation system 2 is controlled to stop, the energy storage system 5 is discharged to supply power to the load system; when the discharge depth of the energy storage system 5 reaches the set value, the power generation system 2 is controlled to start, the power generation system 2 supplies power to the load system, and the excess power is used to charge the energy storage system 5, and the cycle is repeated.

[0170] (3) When the total power of the load system is greater than the total power of the power generation system, and the sum of the discharge capacity of the energy storage system 5 and the power generation capacity of the power generation system 2 is greater than the power consumption of the load system, the energy storage system 5 and the power generation system 2 are selected to discharge at the same time to supply power to the load system.

[0171] (4) When the total power of the load system is greater than the total power of the power generation system, the energy storage system 5 is not fully charged, and the sum of the power generation capacity of the power generation system 2 is less than the power consumption of the load system, the power generation system 2 is first charged to the energy storage system 5; when the power consumption meets the load power consumption, the energy storage system 5 and the power generation system 2 are discharged at the same time to supply power to the load system.

[0172] The number of the generator sets 21 in the power generation system 2 and the capacity of the battery packs 51 in the energy storage system 5 can be evaluated and matched according to the displacement and pressure working conditions of the work to determine the most economical matching mode.

[0173] In the fourth working mode, as Figure 34 , Figure 35 andFigure 36 As shown, in the case of meeting the external power supply outside the well site, the external power supply system 6 is used to provide power to the load system, and the energy storage system 5 can also be charged. During operation, the electric motor in the load system drives, for example, a centrifugal pump, a chemical pump, a mixer, a dry powder conveyor, and other actuators, and the corresponding motor controller adjusts the speed to achieve the preparation and delivery of the sand-carrying fluid.

[0174] In the fourth operation mode, the power supply scheme is as follows: when the operation power consumption is less than the discharge capacity of the energy storage system 5, the energy storage system 5 is directly discharged; when the operation power consumption is greater than the discharge capacity of the energy storage system 5, the well site power supply can be used. Specifically, the external well site power supply is connected to the DC bus module 314 of the power supply control device 31 through the voltage rectifier device 18 of the external power supply system 6. The alternating current generated by the external well site power supply is converted to direct current by the voltage rectifier device 18, and the direct current is supplied to the load system through the DC bus module 314 of the power supply control device 31. At the same time, the battery pack 51 can supply power to the load system through the DC conversion module 313 of the power supply control device 31 and the DC bus module 314. The external power supply system 6 here can also charge the battery pack 51, and the battery pack 51 can be charged through the charging pile.

[0175] In the fifth operation mode, as shown in Figure 37 and Figure 38 The three power supply modes of the power generation system, the energy storage system, and the external power supply system are integrated at the same time. During operation, the electric motor in the load system drives, for example, various centrifugal pumps, chemical pumps, mixers, dry powder conveyors, and other actuators, and the corresponding motor controller adjusts the speed to achieve the preparation and delivery of the sand-carrying fluid.

[0176] Specifically, the external well site power supply is connected to the DC bus module 314 of the power supply control device 31 through the voltage rectifier device 18 of the external power supply system 6. The alternating current generated by the external well site power supply is converted to direct current by the voltage rectifier device 18 and supplied to the load system through the DC bus module 314. At the same time, the battery pack 51 can supply power to the load system through the DC conversion module 313 of the power supply control device 31 and the DC bus module 314. The generator set 21 of the power generation system 2 is connected to the DC bus module 314 through the rectifier module 312 of the power supply control device 31, thereby supplying power to the load system. In addition, the external well site power supply and the generator set 21 here can be used to charge the energy storage system 5.

[0177] As shown in Figure 39 particular, the well site power supply converts alternating current into direct current through the external power supply system 6 to supply power to the load system and the energy storage system 5. When the working power is low, the battery pack 51 of the energy storage system 5 can be used to directly supply power to the load system for work, and the energy storage system 5 can be charged again after work. The generator set 21 converts the alternating current generated by the generator set 21 into direct current through the rectifier module 312 to supply power to the load system, and the excess power is used to charge the energy storage system 5. The number of generator sets 21 and the capacity of the energy storage system 5 can be evaluated and matched according to the displacement and pressure working conditions of the work to determine the most economical matching method, and the battery pack 51 of the energy storage system 5 can meet the charging pile for charging.

[0178] In the fifth working mode, multiple power supply modes can be selected, so that whether the energy storage system meets the working power consumption can be determined according to the working power consumption:

[0179] 1. When the working power consumption is less than the discharge capacity of the energy storage system, the battery pack 51 of the energy storage system 5 can be used to directly supply power to the load system for work, and the energy storage system 5 can be charged after the work is completed.

[0180] 2. When the working power consumption is greater than the discharge capacity of the energy storage system, it is determined whether the external power supply can be used. If the external power supply can be used, the external power supply is preferentially selected to supply power to the load system through the external power supply system 6.

[0181] 3. When the working power consumption is greater than the discharge capacity of the energy storage system and the external power supply cannot be used, the following modes are selected according to the size relationship between the total power of the load system and the total power of the power generation system to supply power:

[0182] (1) When the total power of the load system is less than the total power of the power generation system and the discharge depth of the energy storage system 5 does not reach the set value, the energy storage system 5 is discharged to supply power to the load system. When the discharge depth of the energy storage system 5 reaches the set value, the power generation system 2 is started, so that the power generation system 2 supplies power to the load system, and the excess power is used to charge the energy storage system 5. When the energy storage system 5 is fully charged, the power generation system 2 is controlled to stop, and the energy storage system 5 is discharged to supply power to the load system, thereby realizing cyclic power supply.

[0183] (2) When the total power of the load system is less than the total power of the power generation system and the discharge depth of the energy storage system 5 reaches a set value, the power generation system 2 is started first, the power generation system 2 supplies power to the load system, and the excess power is charged to the energy storage system 5; when the energy storage system 5 is fully charged, the power generation system 2 is controlled to stop, the energy storage system 5 is discharged to supply power to the load system; when the discharge depth of the energy storage system 5 reaches a set value, the power generation system 2 is controlled to start, the power generation system 2 supplies power to the load system, and the excess power is charged to the energy storage system 5, so as to realize the cycle power supply.

[0184] (3) When the total power of the load system is greater than the total power of the power generation system, the energy storage system 5 does not need to be charged, and the sum of the discharge amount of the energy storage system 5 and the power generation amount of the power generation system 2 is greater than the power consumption of the load system, the energy storage system 5 and the power generation system 2 are selected to be discharged at the same time to supply power to the load system.

[0185] (4) When the total power of the load system is greater than the total power of the power generation system, the energy storage system 5 is not fully charged, and the sum of the power generation amount of the power generation system 2 is less than the power consumption of the load system, the power generation system 2 is first charged to the energy storage system 5; when the power consumption meets the load power consumption, the energy storage system 5 and the power generation system 2 are discharged at the same time to supply power to the load system.

[0186] The number of the generator set in the power generation system 2 and the capacity of the battery pack in the energy storage system 5 can be evaluated and matched according to the displacement and pressure working condition of the operation to determine the most economical matching mode.

[0187] The third embodiment of the present disclosure provides a well site operation system, which has the same main content as the second embodiment. In this embodiment, the energy storage system, the power generation system, the external power supply system and the like cooperate with each other to make the well site operation system convenient for external power supply, power generation or energy storage function when carrying out sand mixing operation. This embodiment provides three power supply control modes:

[0188] Figure 40The first power supply mode is shown, in which one or multiple AC power inputs are used, including but not limited to the following: power grid input, independent diesel or gas driven generator set power input, self-provided diesel generator or PTO power generator power input of the sand mixing device, and power input using energy storage systems such as super capacitors or battery packs. The execution components for sand mixing operations, including suction motors, discharge motors, agitator motors, dry additive motors, and liquid additive motors, are directly connected to a DC bus module, for example, through an inverter device.

[0189] Figure 41 The second power supply mode is shown, in which one or multiple AC power inputs are used, including but not limited to the following: power grid input, independent diesel or gas driven generator set power input, self-provided diesel generator or PTO power generator power input of the sand mixing device, and power input using energy storage systems such as super capacitors or battery packs. Here, because the power of the suction motor and the discharge motor is large, other power systems can be selected, such as 600V, 690V, 1140V, or 10kV, while other components such as agitator motors, dry additive motors, and liquid additive motors are powered by conventional power systems, such as 380V.

[0190] Figure 42 And Figure 43 The third power supply mode is shown, in which, based on the first two power supply modes, an AFE module can be added to feed back electrical energy generated during device operation to the power grid, reducing energy waste.

[0191] The electrically driven sand mixing device in the embodiment uses a common DC bus mode, in which the external power supply of different devices is converted into a common bus DC power supply after being connected, and is used to power the main components of the vehicle. Using the common DC bus mode can directly connect the motor controllers corresponding to each component to the DC bus, and use appropriate inverter devices to control the electric motors, thereby replacing the previous scheme in which each motor is equipped with a frequency converter. Through the above structure, the complexity of the power supply system can be reduced, and the workload can be reduced. At the same time, in the prior art, an electric reactor is required at the front end of each frequency converter, while in the embodiment, only one electric reactor is required at the front end of the DC bus module.

[0192] In the structure of the well site operation well system in the embodiment, the electric motors in the load system are connected to execution components such as centrifugal pumps and agitators to achieve driving.

[0193] As Figures 44 to 48As shown, specifically, the electric motor 8 is directly connected with the execution assembly 82 through at least one connecting device 81, which can be at least one of a transmission shaft, a shaft coupling, a belt, a chain, etc. The execution assembly 82 here is, for example, various execution assemblies for sand mixing, mixing, fracturing operations, without limitation to specific execution assembly types. For example, in Figure 35 , the execution assembly 82 is a centrifugal pump, in Figure 36 , the execution assembly 82 is a stirrer, and in Figure 37 , the execution assembly 82 is a sand conveying auger.

[0194] In another embodiment, a speed changing device 83, which can be, for example, a gearbox, can be further provided between the connecting device 81 and the electric motor 8. The electric motor 8 is connected with the connecting device 81 through the speed changing device 83. In addition, a connecting device 81 can be further provided between the electric motor 8 and the speed changing device 83, for example, the electric motor 8 is connected with the gearbox through a shaft coupling, and the gearbox is connected with the sand conveying auger 82b through a shaft coupling.

[0195] The well site operation system disclosed herein can also be used for nitrogen production. Currently, in conventional nitrogen production devices, diesel drive, electric drive and natural gas drive are mainly used to drive air compressors or compressors for nitrogen production. The main driving devices are diesel engines, natural gas engines or three-phase asynchronous motors. The size of the engine or high-power motor used in the conventional diesel drive, natural gas drive or conventional electric drive for nitrogen production is very large, which occupies a large space in an environment with small space requirement. Especially for marine products, the size and weight of the driving device are very strict, and the size and weight are the key factors restricting the improvement of such equipment.

[0196] As shown in Figure 49 and Figure 50 , the entire structure of the nitrogen production equipment driven by diesel or natural gas driven air compressor is very complex and bulky. The space occupied by the core component, such as the head of the double-screw air compressor, is not more than 1 / 4, but the entire nitrogen production device is occupied by the engine and has a large weight. As shown in Figure 51 , in the nitrogen production device driven by an electric air compressor or compressor, the conventional electric drive often uses a three-phase asynchronous motor. In this structure, although the air compressor and the compressor save a large space, the volume and weight of the three-phase asynchronous motor still occupy a large part of the space, which still has a great restriction on the highly integrated equipment such as single vehicle, single skid and marine nitrogen production. Due to the volume, the air compressor cannot be arranged flexibly.

[0197] The fourth embodiment of the present disclosure provides a well site operation system, which is essentially an electrically-driven nitrogen generation assembly, comprising a compression unit 201 connected with an axial flux motor 202, wherein the axial flux motor 202 drives the compression unit 201 to operate, and the compression unit 201 can be an air compressor 2011 or a compressor 2012. The axial flux motor 202 drives the air compressor 2011 or the compressor 2012 to avoid the problems existing in the conventional electrically-driven nitrogen generation assembly.

[0198] In the present embodiment, the electrically-driven nitrogen generation assembly can have various arrangements, such as the compression unit 201 directly connected with the axial flux motor 202, the compression unit 201 remotely connected with the axial flux motor 202, or the compression unit 201 commutatively connected with the axial flux motor 202.

[0199] Specifically, as shown in Figure 52 and Figure 53 , when the compression unit 201 is directly connected with the axial flux motor 202, as shown in Figure 43 , the output shaft of the axial flux motor 202 is connected with the head of the air compressor 2011, or as shown in Figure 44 , the output shaft of the axial flux motor 202 is connected with the input shaft of the compressor 2012.

[0200] As shown in Figure 54 and Figure 55 , the compression unit 201 is connected with the axial flux motor 202 through a transmission device 203 to achieve remote transmission connection therebetween, wherein, as shown in Figure 6 , the output shaft of the axial flux motor 202 is connected with one end of the transmission device 203, and the other end of the transmission device 203 is connected with the head of the air compressor 2011, or as shown in Figure 7 , the output shaft of the axial flux motor 202 is connected with one end of the transmission device 203, and the other end of the transmission device 203 is connected with the input shaft of the compressor 2012. The transmission device 203 can be a transmission shaft or a shaft coupling. The remote transmission connection between the axial flux motor 202 and the air compressor 2011 or the compressor 2012 can make full use of the space.

[0201] As shown in Figure 56 and Figure 57 , the compression unit 201 is connected with the axial flux motor 202 through a commutative device 204 to achieve commutative transmission connection therebetween, wherein, as shown in Figure 47As shown, the output shaft of the axial flux motor 202 is connected with one end of the reversing device 204, and the other end of the reversing device 204 is connected with the head of the air compressor 2011, or as shown in Figure 48 As shown, the output shaft of the axial flux motor 202 is connected with one end of the reversing device 204, and the other end of the reversing device 204 is connected with the input shaft of the compressor 2012. The reversing device 204 here can realize the reversing transmission of the power output by the axial flux motor 202 at any angle. The reversing device 204 here can be a flexible reversing device or a rigid reversing device. By connecting the axial flux motor 202 and the air compressor 2011 or the compressor 2012 through the reversing transmission, the entire electric-driven nitrogen production assembly can make more full use of space and can be flexibly installed in a limited space.

[0202] The fifth embodiment of the present disclosure provides an electric-driven nitrogen production device which can realize nitrogen production operation at any specified location. In this embodiment, the electric-driven nitrogen production device can adopt a vehicle-mounted form or a skid-mounted form. Specifically, the electric-driven nitrogen production device can adopt a vehicle-mounted form, as shown in Figure 49 As shown, Figure 58 A compact electric-driven nitrogen production vehicle is shown, which includes a vehicle body 400 having a working space, a nitrogen generation device 300 is arranged on the working space, and the nitrogen generation device 300 is connected with at least one electric-driven nitrogen production assembly 500. In this embodiment, in order to increase the nitrogen production efficiency, the nitrogen generation device 300 is connected with two electric-driven nitrogen production assemblies 500, one of which includes a first axial flux motor 501 and an air compressor 2011 connected with the first axial flux motor 501, and the other of which includes a second axial flux motor 502 and a compressor 2012 connected with the second axial flux motor 502. The air compressor 2011 and the compressor 2012 here are both connected with the nitrogen generation device 300. Preferably, the nitrogen generation device 300 is arranged in the middle of the working space, and the two electric-driven nitrogen production assemblies 500 are arranged on both sides of the nitrogen generation device 300 and close to the front and rear positions of the vehicle respectively.

[0203] In this embodiment, by using an axial flux motor, the overall size and weight of the electric-driven nitrogen production device can be greatly reduced. After replacing the original motor with an axial flux motor, the electric-driven nitrogen production device can be driven without using the chassis, which significantly reduces the overall cost of the electric-driven nitrogen production device and significantly improves the economic effect.

[0204] Specifically, the electric-driven nitrogen production device can adopt a skid-mounted form, as shown in Figure 59 As shown, Figure 50A compact electrically-driven nitrogen generation skid is shown, which includes a skid body 600 having a working space, a nitrogen generation device 300 is arranged in the working space, and the nitrogen generation device 300 is connected with at least one electrically-driven nitrogen generation assembly 500. In the embodiment, in order to increase the nitrogen generation efficiency, the nitrogen generation device 300 is connected with two electrically-driven nitrogen generation assemblies 500, one of the electrically-driven nitrogen generation assemblies 500 includes a first axial flux motor 501 and an air compressor 2011 connected with the first axial flux motor 501, and the other electrically-driven nitrogen generation assembly 500 includes a second axial flux motor 502 and a compressor 2012 connected with the second axial flux motor 502, and the air compressor 2011 and the compressor 2012 are both connected with the nitrogen generation device 300. Preferably, the nitrogen generation device 300 is arranged in the middle of the working space 40a, and the two electrically-driven nitrogen generation assemblies 500 are arranged on both sides of the nitrogen generation device 300 and close to both ends of the skid body 600 respectively. Of course, the electrically-driven nitrogen generation device is arranged in a skid, which is beneficial to the assembly of multiple skid-mounted electrically-driven nitrogen generation devices to provide a large amount of nitrogen gas at a predetermined position.

[0205] In the embodiment, by using the axial flux motor, the overall size and weight of the electrically-driven nitrogen generation device can be greatly reduced, and by replacing the original motor with the axial flux motor, an integrated supercharging and nitrogen generation structure can be realized, for example, single-skid integration can be realized, and the volume of the skid body can also be smaller when double-skid is realized, so that the overall cost of the electrically-driven nitrogen generation device is significantly reduced, and the economic effect is significantly improved.

[0206] Compared with diesel-driven and natural gas-driven nitrogen generation, the disclosed embodiment has small pollution, low noise, good economy, and lower size and weight, which is more conducive to realizing high-integration projects such as single vehicle, single skid, and marine nitrogen generation; compared with traditional electrically-driven nitrogen generation, the disclosed embodiment has smaller volume, higher capacity density, and is more conducive to space optimization design, and through space optimization of the structure layout, a better use environment can be provided for customers.

[0207] In the above-described embodiments of the disclosure, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0208] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0209] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this disclosure.

[0210] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0211] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A wellsite operations system, characterized by, The loading system comprises a power generation system, an energy storage system, a load system and a control system, the load system comprises at least one main motor device and an execution assembly, the energy storage system or the power generation system can supply power to the load system alone or the energy storage system and the power generation system can supply power to the load system simultaneously or the power generation system can supply power to the load system alone and charge the energy storage system.

2. The wellsite operations system of claim 1, wherein, When the execution assembly is multiple, the execution assembly is configured to correspond to the motor.

3. The wellsite operations system of claim 2, wherein, The main motor device comprises at least one motor, which is an axial flux motor or a radial flux motor or a reluctance motor.

4. The wellsite operations system of claim 1, wherein, Further comprising an external power supply system, through which external power supply is supplied to the load system.

5. The wellsite operations system of claim 4, wherein, The external power supply system comprises at least one of a power distribution device, a voltage conversion device, a frequency conversion device, a power distribution device.

6. The wellsite operations system of claim 4, wherein, The control system comprises at least a power supply control device, a whole machine control device and a charging control device, the power supply control device is connected with the power generation system and / or the energy storage system and / or the external power supply system; the whole machine control device is used for controlling the main motor device and / or the execution assembly in the load system; the charging control device is connected with the external power supply system or the power generation system for charging the energy storage system.

7. The wellsite operations system of claim 6, wherein, The power supply control device comprises at least one of a parallel connection module, a rectifier module, a DC conversion module and a DC bus module, and at least comprises a current limiting module and a rectifier module.

8. The wellsite operations system of claim 1, wherein, Further comprising a heat dissipation system for providing heat dissipation for the energy storage system and / or the power generation system and / or the load system.

9. The wellsite operations system of claim 1, wherein, The loading system adopts the form of skid-mounted or vehicle-mounted or semi-trailer-mounted.

10. The wellsite operations system of claim 1, wherein, Further comprising an auxiliary motor device connected with the power generation system and / or the energy storage system.

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