WO2023082249A1

WO2023082249A1 - Electrically-driven fracturing device

Info

Publication number: WO2023082249A1
Application number: PCT/CN2021/130630
Authority: WO
Inventors: 崔海萍; 崔文平; 葛安鹏; 王继鑫; 李朋
Original assignee: 烟台杰瑞石油装备技术有限公司
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2023-05-19
Also published as: CN115427683A

Abstract

An electrically-driven fracturing device (100), comprising a fracturing pump (110), a gearbox (120), a first prime mover (131) and a second prime mover (132), wherein the fracturing pump (110) is configured to pressurize a low-pressure fluid into a high-pressure fluid; the gearbox (120) comprises a first power input interface (121), a second power input interface (122) and a power output interface (123); the first prime mover (131) is connected to the first power input interface (121) of the gearbox (120), the second prime mover (132) is connected to the second power input interface (122) of the gearbox (120), and the fracturing pump (110) is connected to the power output interface (123) of the gearbox (120); and the power of the first prime mover (131) is greater than the power of the second prime mover (132), and the first prime mover (131) is a constant-speed electric motor. In the electrically-driven fracturing device, a power input unit of the electrically-driven fracturing device can be switched between a first prime mover and a second prime mover, so as to achieve the aim of adjusting the displacement of the electrically-driven fracturing device. Moreover, since the first prime mover is a constant-speed electric motor, there is no need to provide a frequency converter for speed regulation, such that the volume of the entire electrically-driven fracturing device can be reduced, thereby facilitating transportation.

Description

Electric drive fracturing equipment

technical field

Embodiments of the present disclosure relate to an electrically driven fracturing device.

Background technique

In the field of oil and natural gas extraction, fracturing refers to a technology that uses high-pressure fracturing fluid to form cracks in oil and gas layers during oil or gas extraction. Through fracturing operations, oil and gas layers can be fractured, which can improve the flow environment of oil or natural gas underground and increase the production of oil wells. Therefore, fracturing operation is the main production stimulation method in oil and gas field exploitation. On the other hand, shale gas resources are abundant in the world, but due to the low permeability of shale formations, they have not been widely developed yet. As one of the core technologies of shale gas development, fracturing technology can be widely used in shale reservoir reconstruction and shale gas exploitation.

Generally, equipment used for fracturing operations includes sand mixing equipment, mixing equipment, fracturing equipment and fracturing fluid delivery equipment. Sand mixing equipment and compounding equipment can be used to prepare fracturing fluid with fracturing sand; fracturing equipment can pressurize fracturing fluid to convert low-pressure fracturing fluid into high-pressure fracturing fluid; fracturing fluid The delivery equipment can be used to deliver the low-pressure fracturing fluid to the fracturing equipment for pressurization, and can also be used to deliver the pressurized high-pressure fracturing fluid to the wellhead for fracturing operations.

Contents of the invention

An embodiment of the present disclosure provides an electrically driven fracturing device. The electric drive fracturing equipment includes two power input units, namely the first prime mover and the second prime mover, and the power of the first prime mover is greater than that of the second prime mover, so the power input of the electric drive fracturing equipment can be The unit switches between the first prime mover and the second prime mover to achieve the purpose of adjusting the displacement of the electrically driven fracturing equipment. Moreover, since the first prime mover is a fixed-speed motor, there is no need to set a frequency converter for speed regulation, thereby reducing the volume of the entire electric-driven fracturing equipment, thereby facilitating transportation.

At least one embodiment of the present disclosure provides an electric drive fracturing equipment, which includes: a fracturing pump configured to pressurize low-pressure fluid into high-pressure fluid; a gear box including a first power input interface, a second power input interface, and a power input interface. output interface; the first prime mover is connected to the first power input interface of the gearbox; the second prime mover is connected to the second power input interface of the gearbox, and the fracturing pump is connected to the The power output interface of the gearbox is connected, the power of the first prime mover is greater than the power of the second prime mover, and the first prime mover is a fixed-speed motor.

For example, in the electrically driven fracturing equipment provided in an embodiment of the present disclosure, the second prime mover is a variable speed motor.

For example, the electric drive fracturing equipment provided by an embodiment of the present disclosure further includes: a frequency converter, one end of which is connected to the variable speed motor, and the other end is configured to be connected to a power supply facility.

For example, in the electric drive fracturing equipment provided in an embodiment of the present disclosure, the frequency converter is integrated with the variable speed motor.

For example, in the electrically driven fracturing equipment provided in an embodiment of the present disclosure, the second prime mover is an internal combustion engine or a turbine engine.

For example, in the electrically driven fracturing equipment provided in an embodiment of the present disclosure, the ratio of the power of the second prime mover to the power of the first prime mover ranges from 1/8 to 1/12.

For example, in the electrically driven fracturing equipment provided in an embodiment of the present disclosure, the ratio of the power of the second prime mover to the power of the first prime mover ranges from 1/10.

For example, in the electrically driven fracturing equipment provided in an embodiment of the present disclosure, the gear box includes a planetary gear box.

For example, in the electrically driven fracturing equipment provided in an embodiment of the present disclosure, the first power input interface is a first power input shaft, and the second power input interface is a second power input shaft.

For example, the electric drive fracturing equipment provided in an embodiment of the present disclosure further includes: a first transmission mechanism, one end of which is connected to the output shaft of the first prime mover, and the other end is connected to the first power input interface of the gearbox; And the second transmission mechanism, one end is connected with the output shaft of the second prime mover, and the other end is connected with the second power input interface.

For example, in the electrically driven fracturing equipment provided in an embodiment of the present disclosure, the first transmission mechanism and the second transmission mechanism include transmission shafts or couplings.

For example, the electric drive fracturing equipment provided in an embodiment of the present disclosure further includes: a first lubricating system connected to the first prime mover and configured to lubricate the first prime mover; a second lubricating system, connected to the second prime mover and configured to lubricate the second prime mover; a third lubrication system connected to the fracturing pump and configured to lubricate the fracturing pump; Four lubricating systems, connected with the gear box, and configured to lubricate the gear box; and lubricating oil cooling systems, respectively connected with the first lubricating system, the second lubricating system, and the third lubricating system The system is connected to the fourth lubricating system and is configured to dissipate heat from lubricating oil in the first lubricating system, the second lubricating system, the third lubricating system, and the fourth lubricating system.

For example, the electric drive fracturing equipment provided in an embodiment of the present disclosure further includes: a carrying device, the fracturing pump and the first prime mover are fixed on the carrying device, the lubricating oil cooling system is located on the The side of the split pump or the first prime mover away from the bearing device.

For example, in the electrically driven fracturing equipment provided in an embodiment of the present disclosure, the second prime mover is located on a side of the gear box away from the carrying device.

For example, in the electrically driven fracturing equipment provided in an embodiment of the present disclosure, the carrying device includes a vehicle body or a skid.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present disclosure more clearly, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description only relate to some embodiments of the present disclosure, rather than limiting the present disclosure .

Fig. 1 is the schematic diagram of a kind of fracturing equipment;

Fig. 2 is a schematic diagram of an electric drive fracturing equipment provided by an embodiment of the present disclosure;

Fig. 3 is a schematic diagram of a lubrication system in an electric drive fracturing equipment provided by an embodiment of the present disclosure; and

Fig. 4 is a schematic diagram of another electrically driven fracturing equipment provided by an embodiment of the present disclosure.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Apparently, the described embodiments are some of the embodiments of the present disclosure, not all of them. Based on the described embodiments of the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without creative effort fall within the protection scope of the present disclosure.

Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by those skilled in the art to which the present disclosure belongs. "First", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Comprising" or "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other elements or items. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

The fracturing equipment includes a prime mover, a transmission mechanism and a fracturing pump. The prime mover is connected to the fracturing pump through the transmission mechanism to provide mechanical power to the fracturing pump through the transmission mechanism; the fracturing pump uses the mechanical power to pressurize the low-pressure fluid for high-pressure fluids. Common fracturing equipment uses a diesel engine as the prime mover, but this fracturing equipment has the following disadvantages: (1) The diesel engine is large in size and heavy in weight, which easily leads to large volume and heavy weight of the fracturing equipment, resulting in restricted transportation , low power density; (2) Diesel engines will produce exhaust gas pollution and noise pollution during operation, which is not environmentally friendly; (3) The purchase cost of diesel engines is relatively high, and the fuel consumption per unit power during operation is high.

On the other hand, with the continuous development and progress of shale oil and gas development, the scale of fracturing operations is also expanding, and the pressure and displacement required for fracturing operations are getting higher and higher. Therefore, the power requirements for a single fracturing equipment Also getting higher and higher. Since the usual fracturing equipment uses a diesel engine as the prime mover, its power can no longer meet the fracturing and displacement requirements required for fracturing operations. In this regard, electric drive fracturing equipment emerges as a kind of fracturing equipment powered by electric motor, which usually includes electric motor, transmission mechanism and fracturing pump; the motor is connected with the fracturing pump through the transmission mechanism to transmit mechanical power Feed the fracturing pump; the pressure pump uses the mechanical power to convert the low-pressure fracturing fluid into high-pressure fracturing fluid for fracturing operations. Electric drive fracturing equipment uses electric motors to drive plunger pumps, so it has the advantages of high power, small size, economy, energy saving, and environmental protection.

Figure 1 is a schematic diagram of a fracturing device. As shown in Figure 1, the electric drive fracturing equipment 10 includes a fracturing pump 11, a motor 12, a transmission mechanism 13, a frequency converter 14 and a reduction box 15; the motor 12 is connected to the power input end of the reduction box 15 through the transmission mechanism 13, The power output end of the reduction box 15 is connected with the fracturing pump 11; thus, the motor 12 can transmit the speed and torque to the fracturing pump 11 through the transmission mechanism 13 and the reduction box 15; one end of the frequency converter 14 is connected with the power supply facility, and the frequency converter The other end of 14 is connected to the motor 12, so that the rotation speed of the motor 12 can be controlled by changing the frequency of the power output by the frequency converter 14, so as to achieve the purpose of adjusting the displacement of the electric drive fracturing equipment 10. However, due to the high power of the motor 12, the size and weight of the corresponding frequency converter 14 are also large; in order to meet the requirements of road transportation, the frequency converter 14 and the motor 12 cannot be integrated for transportation, but need to be transported separately. Thereby increasing the difficulty and cost of transportation. At the same time, since the size and weight of the frequency converter are relatively large, the cost of the frequency converter is also relatively high, thereby increasing the cost of the entire electric drive fracturing device.

To this end, an embodiment of the present disclosure provides an electrically driven fracturing device. The electric drive fracturing equipment includes a fracturing pump, a gear box, a first prime mover, and a second prime mover; the fracturing pump is configured to pressurize the low-pressure fluid into a high-pressure fluid; the gear box includes a first power input interface, a second The power input interface and the power output interface, the first prime mover is connected to the first power input interface of the gearbox, the second prime mover is connected to the second power input interface of the gearbox, and the fracturing pump is connected to the power output interface of the gearbox; The power of the first prime mover is greater than that of the second prime mover, and the first electric motor is a constant speed electric motor. The electric drive fracturing equipment includes two power input units, namely the first prime mover and the second prime mover, and the power of the first prime mover is greater than that of the second prime mover, so the power input of the electric drive fracturing equipment can be The unit switches between the first prime mover and the second prime mover to achieve the purpose of adjusting the displacement of the electrically driven fracturing equipment. Moreover, since the first prime mover is a fixed-speed motor, there is no need to set a frequency converter for speed regulation, thereby reducing the volume of the entire electric-driven fracturing equipment, thereby facilitating transportation.

Below, the electric drive fracturing equipment provided by the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

An embodiment of the present disclosure provides an electrically driven fracturing device. Fig. 2 is a schematic diagram of an electrically driven fracturing device provided by an embodiment of the present disclosure. As shown in FIG. 2, the electrically driven fracturing equipment 100 includes a fracturing pump 110, a gear box 120, a first prime mover 131, and a second prime mover 132; ) is pressurized as a high-pressure fluid; the gear box 120 includes a first power input interface 121, a second power input interface 122 and a power output interface 123, that is to say, the gear box 120 has two power input interfaces; the first prime mover 131 and The first power input interface 121 of the gearbox 120 is connected, so that the power generated by the first prime mover 131 can be output to the first power input interface 121; the second prime mover 132 is connected with the second power input interface 122 of the gearbox 120, Thus, the power generated by the second prime mover 132 can be output to the second power input interface 122; the fracturing pump 110 is connected to the power output interface 123 of the gear box 120; the power of the first prime mover 131 is greater than the power of the second prime mover 132 , the first prime mover 131 is a constant speed motor.

In the electric drive fracturing equipment provided by the embodiment of the present disclosure, the electric drive fracturing equipment includes two power input units, namely the first prime mover and the second prime mover, and the power of the first prime mover is greater than that of the second prime mover Therefore, the purpose of adjusting the displacement of the electric-driven fracturing equipment can be achieved by switching the power input unit of the electric-driven fracturing equipment between the first prime mover and the second prime mover. For example, when a large displacement needs to be output, the electric drive fracturing and equipment can start the first prime mover and close the second prime mover; when a small displacement needs to be output, the electric drive fracturing and equipment can close the first prime mover. prime mover, and turn on the second prime mover. On the other hand, since the first prime mover is a fixed-speed motor, there is no need to set a frequency converter for adjusting the speed of the first prime mover, thereby reducing the volume of the entire electric-driven fracturing equipment and facilitating transportation.

In some examples, second prime mover 132 is a variable speed electric motor. Therefore, the electric drive fracturing equipment can not only achieve the purpose of adjusting the displacement of the electric drive fracturing equipment by switching the power input unit between the first prime mover and the second prime mover, but also directly adjust the second prime mover. Second, the speed of the prime mover is used to adjust the displacement.

For example, when a large displacement needs to be output, the electric drive fracturing and equipment can start the first prime mover and close the second prime mover; when a small displacement needs to be output, the electric drive fracturing and equipment can close the first prime mover. the prime mover, and turn on the second prime mover; moreover, the electrically driven fracturing equipment can also directly adjust the rotation speed of the second prime mover to adjust the displacement.

In some examples, as shown in FIG. 2 , in order to adjust the rotational speed of the second prime mover, the electrically driven fracturing equipment further includes a frequency converter 140 , one end of the frequency converter 140 is connected to the variable speed motor 132 , and the other end is configured To be connected to the power supply facility.

It should be noted that since the power of the second prime mover is relatively small, the size and weight of the frequency converter corresponding to the second prime mover are also relatively small; therefore, although the electric drive fracturing equipment still uses a frequency converter, the frequency conversion The size and weight of the machine can be greatly reduced, so that it can be integrated and transported with the first prime mover, frac pump and second prime mover. Moreover, since the size and weight of the frequency converter corresponding to the second prime mover are relatively small, its cost is also relatively low, thereby helping to reduce the cost of the entire electric drive fracturing equipment. On the other hand, since the ratio of the power of the second prime mover to the power of the first prime mover ranges from 1/8 to 1/12, the electrically driven fracturing equipment can have Larger displacement. That is to say, while the electric drive fracturing equipment can realize large displacement and adjustable displacement, the size and weight of the frequency converter are reduced.

For example, the above-mentioned power supply facility may be a power grid or a generator, which is not limited in this embodiment of the present disclosure.

In some examples, as shown in FIG. 2 , the frequency converter 140 is integrated with the variable speed motor 132 to facilitate installation and maintenance.

In some examples, the ratio of the power of the second prime mover 132 to the power of the first prime mover 131 ranges from 1/8-1/12. Therefore, although the electric drive fracturing equipment still uses a frequency converter, since the power ratio of the second prime mover to the power of the first prime mover ranges from 1/8 to 1/12, the size and weight of the frequency converter Can be lowered significantly so that it can be integrated and transported with the first prime mover, frac pump and second prime mover. On the other hand, since the ratio of the power of the second prime mover to the power of the first prime mover ranges from 1/8 to 1/12, the electrically driven fracturing equipment can realize large displacement and adjustable displacement , greatly reducing the size and weight of the inverter.

In some examples, the ratio of the power of the second prime mover 132 to the power of the first prime mover 131 ranges from 1/10.

In some examples, the gearbox includes a planetary gearbox, facilitating the provision of two power input interfaces. Of course, the embodiments of the present disclosure include but are not limited thereto, and the gearbox may also be other types of gearboxes.

In some examples, as shown in FIG. 2 , the first power input interface 121 is a first power input shaft, and the second power input interface 122 is a second power input shaft.

In some examples, as shown in FIG. 2 , the electrically driven fracturing equipment 100 further includes a first transmission mechanism 151 and a second transmission mechanism 152; one end of the first transmission mechanism 151 is connected to the output shaft of the first prime mover 131, The other end of the first transmission mechanism 151 is connected with the first power input interface 121 of the gear box 120; one end of the second transmission mechanism 152 is connected with the output shaft of the second prime mover 132, and the other end of the second transmission mechanism 152 is connected with the second The power input interface 122 is connected.

In some examples, the first transmission mechanism 151 may be a transmission shaft or a coupling; the second transmission mechanism 152 may be a transmission shaft or a coupling.

In some examples, as shown in FIG. 2 , the gearbox 120 and the fracturing pump 110 can be integrated together, so that the degree of integration can be improved and the volume of the entire electric-driven fracturing equipment can be reduced. For example, the power output shaft of the gearbox and the power input shaft of the fracturing pump can be the same shaft, so that the gearbox and the fracturing pump can be integrated.

Fig. 3 is a schematic diagram of a lubrication system in an electric drive fracturing equipment provided by an embodiment of the present disclosure. As shown in Figure 3, the electric drive fracturing equipment 100 also includes a first lubricating system 161, a second lubricating system 162, a third lubricating system 163, a fourth lubricating system 164 and a lubricating oil cooling system 170; the first lubricating system 161 Connected to the first prime mover 131 and configured to lubricate the first prime mover 131; the second lubrication system 162 is connected to the second prime mover 162 and configured to lubricate the second prime mover 162; the third lubrication system The system 163 is connected with the fracturing pump 110 and is configured to lubricate the fracturing pump 110; the fourth lubricating system 164 is connected to the gear box 120 and is configured to lubricate the gear box 120; the lubricating oil cooling system 170 is respectively connected with The first lubricating system 161, the second lubricating system 162, the third lubricating system 163 and the fourth lubricating system 164 are connected, and are configured to the first lubricating system 161, the second lubricating system 162, the third lubricating system 163 and the fourth lubricating system Lubricating oil in system 164 dissipates heat.

In some examples, as shown in FIG. 2 , the electric drive fracturing equipment 100 also includes a bearing device 180 on which the fracturing pump 110 and the first prime mover 131 are fixed; 110 or the side of the first prime mover 131 away from the carrying device 180 . Therefore, the electrically driven fracturing equipment 100 can make full use of the space and improve the degree of integration.

For example, as shown in FIG. 2 , the lubricating oil cooling system 170 is located on the side of the first prime mover 131 away from the carrying device 180 .

In some examples, as shown in FIG. 2 , the second prime mover 132 is located on a side of the gearbox 120 away from the carrying device 180 . Therefore, the electric drive fracturing equipment can make full use of space, reduce the size of the entire electric drive fracturing equipment, and facilitate transportation.

For example, as shown in FIG. 2 , the second prime mover 132 is located on the side of the first transmission mechanism 151 away from the carrying device 180 .

In some examples, as shown in FIG. 2 , the carrying device 180 may be a skid. Thus, the electrically driven fracturing equipment may be an electrically driven fracturing skid. Of course, the embodiments of the present disclosure include but are not limited thereto. The carrying device may also be a vehicle body, and in this case, the electric-driven fracturing equipment may be an electric-driven fracturing vehicle.

In some examples, each of the aforementioned lubricating systems may include components such as a lubricating oil pump, a driving device, a lubricating oil circuit, and a lubricating oil tank. The driving device is connected with the lubricating oil pump and configured to provide power to the lubricating oil pump; the lubricating oil pump is configured to pump lubricating oil to the parts to be lubricated, and drive the lubricating oil to circulate in the lubricating oil circuit and the lubricating oil tank.

For example, as shown in Figure 3, the first lubrication system 161 includes a first lubricating oil pump 161A, a first driving device 161B, a first lubricating oil circuit 161C and a first lubricating oil tank 161D, the first driving device 161B and the first lubricating oil pump 161A connected and configured to provide power to the first lubricating oil pump 161A; the first lubricating oil pump 161A pumps lubricating oil to the first prime mover 131, and drives the lubricating oil to circulate in the first lubricating oil circuit 161C and the first lubricating oil tank 161D .

For example, as shown in Figure 3, the second lubrication system 162 includes a second lubricating oil pump 162A, a second driving device 162B, a second lubricating oil circuit 162C and a second lubricating oil tank 162D, the second driving device 162B and the second lubricating oil pump 162A connected and configured to provide power to the second lubricating oil pump 162A; the second lubricating oil pump 162A pumps lubricating oil to the second prime mover 132, and drives the lubricating oil to circulate in the second lubricating oil circuit 162C and the second lubricating oil tank 162D .

For example, as shown in Figure 3, the third lubricating system 163 includes a third lubricating oil pump 163A, a third driving device 163B, a third lubricating oil passage 163C and a third lubricating oil tank 163D, the third driving device 163B and the third lubricating oil pump 163A connected and configured to provide power to the third lubricating oil pump 163A; the third lubricating oil pump 163A pumps lubricating oil to the fracturing pump 110 and drives the lubricating oil to circulate in the third lubricating oil circuit 163C and the third lubricating oil tank 163D.

For example, as shown in Figure 3, the fourth lubricating system 164 includes a fourth lubricating oil pump 164A, a fourth driving device 164B, a fourth lubricating oil circuit 164C and a fourth lubricating oil tank 164D, the fourth driving device 164B and the fourth lubricating oil pump 164A connected and configured to provide power to the fourth lubricating oil pump 164A; the fourth lubricating oil pump 164A pumps lubricating oil to the gearbox 120 and drives the lubricating oil to circulate in the fourth lubricating oil circuit 164C and the fourth lubricating oil tank 164D.

In some examples, as shown in FIG. 3 , the above-mentioned first lubrication system 161, second lubrication system 162, third lubrication system 163, and fourth lubrication system 164 can be partially integrated; for example, the first lubrication system 161, the second lubrication system The lubricating system 162, the third lubricating system 163, and the fourth lubricating system 164 can share a lubricating oil tank.

Fig. 4 is a schematic diagram of another electrically driven fracturing equipment provided by an embodiment of the present disclosure. As shown in FIG. 4, the electrically driven fracturing equipment 100 includes a fracturing pump 110, a gear box 120, a first prime mover 131, and a second prime mover 132; ) is pressurized as a high-pressure fluid; the gear box 120 includes a first power input interface 121, a second power input interface 122 and a power output interface 123, that is to say, the gear box 120 has two power input interfaces; the first prime mover 131 and The first power input interface 121 of the gearbox 120 is connected, so that the power generated by the first prime mover 131 can be output to the first power input interface 121; the second prime mover 132 is connected with the second power input interface 122 of the gearbox 120, Thus, the power generated by the second prime mover 132 can be output to the second power input interface 122; the fracturing pump 110 is connected to the power output interface 123 of the gear box 120; the power of the first prime mover 131 is greater than the power of the second prime mover 132 , the first prime mover 131 is a constant speed motor.

In some examples, as shown in FIG. 4 , second prime mover 132 is an internal combustion engine or a turbine engine. As a result, a less powerful internal combustion or turbine engine can be used due to the lower power of the second prime mover.

In some examples, the aforementioned internal combustion engine may be a diesel engine or an internal combustion engine capable of burning natural gas.

An embodiment of the present disclosure also provides a driving method of an electric-driven fracturing equipment, the electric-driven fracturing equipment may be the electric-driven fracturing equipment provided in any of the above-mentioned examples, and the driving method includes: when it is necessary to output the first displacement , start the first prime mover and close the second prime mover, when the second displacement needs to be output, start the second prime mover and close the first prime mover, the first displacement is greater than the second displacement.

In some examples, the driving method further includes: adjusting the rotation speed of the second prime mover to adjust the displacement of the electrically driven fracturing equipment.

The following points need to be explained:

(1) In the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are involved, and other structures may refer to general designs.

(2) In the case of no conflict, features in the same embodiment and different embodiments of the present disclosure can be combined with each other.

The above is only a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope of the present disclosure, and should cover all within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be determined by the protection scope of the claims.

Claims

An electric drive fracturing equipment, comprising:

a fracturing pump configured to pressurize the low-pressure fluid to a high-pressure fluid;

A gearbox, including a first power input interface, a second power input interface and a power output interface;

a first prime mover connected to the first power input interface of the gearbox;

a second prime mover connected to the second power input interface of the gearbox,

Wherein, the fracturing pump is connected to the power output interface of the gear box, the power of the first prime mover is greater than that of the second prime mover, and the first prime mover is a fixed-speed motor.
The electrically driven fracturing apparatus of claim 1, wherein the second prime mover is a variable speed motor.
The electric drive fracturing equipment according to claim 2, further comprising:

A frequency converter is connected to the variable speed motor at one end and configured to be connected to a power supply facility at the other end.
The electrically driven fracturing equipment according to claim 3, wherein the frequency converter is integrated with the variable speed motor.
The electrically driven fracturing equipment according to claim 1, wherein the second prime mover is an internal combustion engine or a turbine engine.
The electric drive fracturing equipment according to any one of claims 1-5, wherein the ratio of the power of the second prime mover to the power of the first prime mover ranges from 1/8 to 1/12 .
The electrically driven fracturing equipment according to claim 6, wherein the ratio of the power of the second prime mover to the power of the first prime mover ranges from 1/10.
The electrically driven fracturing apparatus of any one of claims 1-7, wherein the gearbox comprises a planetary gearbox.
The electrically driven fracturing equipment according to any one of claims 1-8, wherein the first power input interface is a first power input shaft, and the second power input interface is a second power input shaft.
The electric drive fracturing equipment according to any one of claims 1-8, further comprising:

a first transmission mechanism, one end of which is connected to the output shaft of the first prime mover, and the other end is connected to the first power input interface of the gearbox; and

One end of the second transmission mechanism is connected with the output shaft of the second prime mover, and the other end is connected with the second power input interface.
The electrically driven fracturing apparatus of claim 10, wherein the first transmission mechanism and the second transmission mechanism comprise transmission shafts or couplings.
The electrically driven fracturing equipment according to any one of claims 1-11, further comprising:

a first lubrication system connected to the first prime mover and configured to lubricate the first prime mover;

a second lubrication system connected to the second prime mover and configured to lubricate the second prime mover;

a third lubrication system connected to the fracturing pump and configured to lubricate the fracturing pump;

a fourth lubrication system connected to the gearbox and configured to lubricate the gearbox; and

The lubricating oil heat dissipation system is respectively connected with the first lubricating system, the second lubricating system, the third lubricating system and the fourth lubricating system, and is configured for the first lubricating system, the second lubricating system The lubricating oil in the second lubricating system, the third lubricating system and the fourth lubricating system dissipates heat.
The electrically driven fracturing equipment according to claim 12, further comprising:

carrying device,

Wherein, the fracturing pump and the first prime mover are fixed on the carrying device, and the lubricating oil cooling system is located on a side of the fracturing pump or the first prime mover away from the carrying device.
The electrically driven fracturing equipment according to claim 13, wherein the second prime mover is located on a side of the gearbox away from the carrying device.
The electrically driven fracturing equipment according to claim 13, wherein the carrying device comprises a car body or a skid body.