Electrically-driven well cementation equipment

Abstract

The utility model relates to the technical field of oil and gas field electric drive well cementation equipment, and provides electric drive well cementation equipment which comprises an electric drive chassis truck and a plunger pump arranged on the electric drive chassis truck, the electric drive chassis truck comprises a chassis and a first motor connected with the chassis, and the chassis is connected with the plunger pump through a first transmission device. Power of the chassis truck can be fully utilized, the plunger pump is driven to work in a mode that the chassis truck breaks a shaft to take power, and the driving efficiency and the driving stability of a well cementation pumping system are improved; the pumping system is driven to work through power takeoff of the chassis truck, so that driving parts can be effectively reduced, and driving noise and equipment production and maintenance cost are reduced; the electrically-driven well cementation equipment is reasonable and compact in overall structure, high in equipment integration degree, high in flexibility and convenient to transition, and well cementation operation is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas extraction equipment technology, specifically to an electric cementing device. Background Technology

[0002] Existing electric cementing equipment requires additional drive components such as generators, resulting in poor overall drive flexibility and low drive efficiency. In low-power operation conditions, it leads to power waste, high noise, and high operating costs. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide an electric cementing device to at least solve the technical problems existing in the prior art, such as poor overall drive flexibility, low drive efficiency, power waste in low-power operation conditions, high noise, and high operating costs.

[0004] To solve the above-mentioned technical problems, embodiments of this utility model provide an electric cementing device, including an electric drive chassis and a plunger pump mounted on the electric drive chassis. The electric drive chassis includes a chassis and a first electric motor connected to the chassis. The chassis is connected to the plunger pump through a first transmission device.

[0005] In some embodiments, the output end of the chassis is connected to a chassis drive shaft, the first transmission device includes a transmission box and a first drive shaft, the chassis drive shaft is connected to the input end of the transmission box, the output end of the transmission box is connected to the first drive shaft, and the first drive shaft is connected to the plunger pump.

[0006] In some embodiments, the electric cementing equipment further includes a fluid supply pump mounted on the electric chassis, the fluid supply pump being connected to the inlet of the plunger pump, and the chassis being connected to the fluid supply pump via the first transmission device.

[0007] In some embodiments, the electric cementing equipment further includes a hydraulic pump mounted on the electric chassis, the chassis being connected to a power take-off (PTO), the PTO being connected to the hydraulic pump, and the hydraulic pump being connected to the supply pump via a hydraulic motor.

[0008] In some embodiments, the electric cementing equipment further includes a second electric motor, which is connected to the plunger pump via a second transmission device. The electric cementing equipment also includes an energy storage unit and / or a power generation unit mounted on the electric chassis, which is connected to the input terminal of the second electric motor.

[0009] In some embodiments, the electric cementing equipment further includes an energy storage unit disposed on the electric drive chassis, the electric drive chassis further includes a chassis power supply device and a range extender, the chassis power supply device and the energy storage unit are respectively connected to the input terminal of the first motor, and the chassis power supply device and the energy storage unit are also respectively connected to the range extender.

[0010] In some embodiments, the electric cementing equipment further includes a power generation unit mounted on the electric chassis, the power generation unit being connected to the input terminal of the first electric motor, and the power generation unit also being connected to the chassis power supply device of the electric chassis.

[0011] In some embodiments, the electric cementing equipment further includes an energy storage unit and a power generation unit disposed on the electric chassis, wherein the energy storage unit and the power generation unit are respectively connected to the input terminal of the first electric motor, and the power generation unit is also connected to the energy storage unit.

[0012] In some embodiments, the electric cementing equipment further includes a metering tank mounted on the electric chassis, the metering tank being connected to the fluid supply pump.

[0013] In some embodiments, the electric cementing equipment further includes a slurry mixing system mounted on the electric chassis. The slurry mixing system includes a mixer, a slurry mixing tank, and a centrifugal pump. The slurry mixing tank is equipped with an agitator. The centrifugal pump is connected to the plunger pump. The centrifugal pump and the agitator are driven by an electric motor or by hydraulic power.

[0014] This utility model provides an electrically driven cementing device. By setting up an electrically driven chassis and mounting a plunger pump on the chassis, the chassis includes a chassis and a first electric motor connected to the chassis. The chassis is connected to the plunger pump via a first transmission device. This fully utilizes the chassis's power, driving the plunger pump through a broken-axle power take-off mechanism. This results in high transmission efficiency and smooth operation, improving the driving efficiency and stability of the cementing pumping system. Simultaneously, using the chassis's power take-off to drive the pumping system effectively reduces driving components, lowers driving noise, and reduces equipment production and maintenance costs. Furthermore, the electrically driven cementing device provided in this embodiment has a reasonable and compact overall structure, high integration, high flexibility, and convenient relocation, facilitating cementing operations. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a first main view structural schematic diagram of the electrically driven cementing equipment according to an embodiment of the present utility model;

[0017] Figure 2 This is a second main view structural schematic diagram of the electrically driven cementing equipment according to an embodiment of the present utility model;

[0018] Figure 3 This is a first top view of the electrically driven cementing equipment according to an embodiment of the present invention;

[0019] Figure 4 This is a second top view of the electrically driven cementing equipment according to an embodiment of the present invention;

[0020] Figure 5 This is a third top view of the electrically driven cementing equipment according to an embodiment of the present utility model;

[0021] Figure 6 This is a schematic diagram showing the connection between the chassis and the plunger pump in an embodiment of the present invention.

[0022] Figure label:

[0023] 1-Electric drive chassis, 11-Chassis, 111-Chassis drive shaft, 12-Chassis power take-off; 2-Plunger pump; 3-Liquid supply pump; 4-Low pressure manifold; 5-First transmission device, 51-Transmission box, 52-First drive shaft; 6-Hydraulic pump; 71-Energy storage unit, 72-Power generation unit; 81-Second electric motor, 82-Second transmission device; 91-Machine control module, 92-Power supply control module, 93-Metering tank, 94-Mixer, 95-Mixing tank. Detailed Implementation

[0024] Various embodiments and features of this utility model are described herein with reference to the accompanying drawings.

[0025] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this invention will be apparent to those skilled in the art.

[0026] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present invention and, together with the general description of the present invention given above and the detailed description of the embodiments given below, serve to explain the principles of the present invention.

[0027] These and other features of the present invention will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0028] It should also be understood that although the present invention has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of the present invention, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0029] The above and other aspects, features and advantages of the present invention will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0030] Specific embodiments of the present invention will now be described with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of the present invention, which may be implemented in various ways. Well-known and / or repeated functions and structures have not been described in detail to avoid unnecessary or redundant details that could obscure the present invention. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use the present invention in a variety of substantially any suitable detailed structures.

[0031] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to the present invention.

[0032] Figures 1 to 6 A schematic diagram of the structure of an electrically driven cementing device according to an embodiment of this utility model is shown. Figures 1 to 6 As shown in the figure, an electric cementing device provided by this utility model includes an electric drive chassis 1 and a plunger pump 2 mounted on the electric drive chassis 1. The electric drive chassis 1 includes a chassis 11 and a first electric motor (not shown in the figure) connected to the chassis 11. The chassis 11 is connected to the plunger pump 2 through a first transmission device 5.

[0033] The plunger pump 2 is the pumping system of the electrically driven cementing equipment. The first electric motor 11 drives the chassis 11, thereby driving the electrically driven chassis vehicle 1. After the chassis vehicle breaks down its axle to take power, the power of the chassis vehicle can be transmitted to the plunger pump 2 through the first transmission device, driving the plunger pump 2 to operate. When the plunger pump 2 is operating, it pressurizes the low-pressure medium (such as cement slurry) transported from the outside through the low-pressure manifold, and then transports the pressurized high-pressure medium to the wellhead through the high-pressure manifold, realizing the high-pressure pumping operation of the medium in cementing operations. The chassis 11 can be connected to the plunger pump 2 through the first transmission device 5 such as a drive shaft and coupling, thereby driving the plunger pump 2 to work.

[0034] The electric-driven cementing equipment provided in this embodiment features an electric-driven chassis 1 with a plunger pump 2 mounted on it. The chassis 1 includes a chassis 11 and a first electric motor connected to it. The chassis 11 is connected to the plunger pump 2 via a first transmission device 5. This design fully utilizes the chassis's power, driving the plunger pump 2 through a shaft take-off mechanism. This results in high transmission efficiency and smooth operation, improving the driving efficiency and stability of the cementing pumping system. Furthermore, using the chassis to take-off power to drive the pumping system effectively reduces the number of driving components, lowers driving noise, and reduces equipment production and maintenance costs. Additionally, the electric-driven cementing equipment provided in this embodiment has a reasonable and compact overall structure, high integration, high flexibility, and convenient relocation, facilitating cementing operations.

[0035] In some embodiments, such as Figure 1 and Figure 2 As shown, the output end of the chassis 11 is connected to the chassis vehicle drive shaft 111. The first transmission device 5 includes a transmission box 51 and a first drive shaft 52. The chassis vehicle drive shaft 111 is connected to the input end of the transmission box 51, and the output end of the transmission box 51 is connected to the first drive shaft 52. The first drive shaft 52 is connected to the plunger pump 2.

[0036] The chassis 11 has a chassis drive shaft 111. After the chassis axle breaks, the chassis drive shaft 111 is connected to the transmission box 51. The transmission box 51 is connected to the plunger pump 2 through the first drive shaft 52. The plunger pump 2 is driven to work by taking power from the broken chassis axle.

[0037] The transmission box 51 includes a gearbox and / or a transfer case, and the transmission box is preferably a gearbox or a worm gear box, which can transmit speed, torque, etc. to the plunger pump 2. For example, a transfer case is added by cutting off the chassis drive shaft 111, and the transfer case is connected to the aforementioned first drive shaft 52, which can transmit power to the plunger pump 2.

[0038] like Figure 6As shown, the electric drive chassis 1 also includes a chassis power take-off (PTO) 12. The output end of the chassis 11 is connected to the chassis PTO 12, and the chassis PTO 12 is connected to the plunger pump 2 via a first transmission device 5. The first transmission device 5 includes a first drive shaft 52. When the chassis 11 and the plunger pump 2 are close together, the chassis PTO 12 can directly transmit power to the plunger pump 2 after taking power from the chassis via the first drive shaft 52.

[0039] In some embodiments, such as Figures 1 to 5 As shown, the electric cementing equipment also includes a liquid supply pump 3 mounted on the electric chassis 1. The liquid supply pump 3 is connected to the inlet of the plunger pump 2, and the chassis 11 is connected to the liquid supply pump 3 via the first transmission device 5.

[0040] The liquid supply pump 3 is connected to the plunger pump 2 via the low-pressure manifold 4, and is used to supply liquid to the plunger pump 2, delivering low-pressure medium to the plunger pump 2. The chassis 11 is connected to the liquid supply pump 3 via the first transmission device 5. The liquid supply pump 3 can also be driven by the chassis vehicle through axle breakage power take-off, thereby effectively utilizing the power of the electric drive chassis vehicle 1.

[0041] The specific transmission connection between the liquid supply pump 3 and the chassis 11 is similar to that of the plunger pump 2 described above. For example, the chassis drive shaft 111 can be connected to the liquid supply pump 3 in sequence through the transmission box 51 and the first drive shaft 52. The specific connection method between the liquid supply pump 3 and the chassis 11 will not be described in detail here.

[0042] The first transmission device 5 may include a transfer case with multiple output terminals. The chassis 11 can be connected to the plunger pump 2 and the liquid supply pump 3 respectively through the transfer case, thereby driving the plunger pump 2 and the liquid supply pump 3 to work respectively. While driving the liquid supply pump 3 to supply liquid to the plunger pump 2, it also drives the plunger pump 2 to perform high-pressure pumping operations. Optionally, the liquid supply pump 3 is a centrifugal pump or a rotary pump, which has high pumping efficiency.

[0043] In some embodiments, such as Figures 3 to 5 As shown, the electric-drive cementing equipment also includes a hydraulic pump 6 mounted on the electric-drive chassis 1. The chassis is connected to a chassis power take-off (PTO) 12, which is connected to the hydraulic pump 6. The hydraulic pump 6 is connected to the fluid supply pump 3 via a hydraulic motor.

[0044] In this embodiment, the liquid supply pump 3 can be driven by a hydraulic drive system. After the hydraulic drive system takes power from the chassis, it drives the hydraulic pump 6, which in turn drives the hydraulic motor, which in turn drives the liquid supply pump 3.

[0045] In some embodiments, such as Figure 1 and Figure 3As shown, the electric cementing equipment also includes an energy storage unit 71 mounted on the electric chassis 1. The electric chassis 1 also includes a chassis power supply device and a range extender. The chassis power supply device and the energy storage unit 71 are respectively connected to the input terminal of the first motor. The chassis power supply device and the energy storage unit 71 are also respectively connected to the range extender.

[0046] The chassis power supply system includes a chassis battery pack, and the energy storage unit 71 can supply power to the first electric motor together with the chassis battery pack on the electric drive chassis. The chassis range extender can charge both the chassis power supply system and the energy storage unit 71 on the platform. Based on the power consumption of the plunger pump 2, the range extender, chassis battery pack, and energy storage unit 71 can discharge together, resolving the power anxiety caused by the high power consumption of the plunger pump 2 during operation and improving the range of the electric drive chassis.

[0047] In some embodiments, such as Figure 2 and Figure 4 As shown, the electric cementing equipment also includes a power generation unit 72 mounted on the electric drive chassis 1. The power generation unit 72 is connected to the input terminal of the first electric motor and is also connected to the chassis power supply device of the electric drive chassis 1.

[0048] The power generation unit 72 on the platform can charge the chassis power supply device of the electric drive chassis vehicle 1, solving the power anxiety caused by insufficient power of the plunger pump 2 during operation or the electric drive chassis vehicle 1 during driving, and improving the range of the electric drive chassis vehicle 1.

[0049] The power generation unit 72 includes an engine and a generator. The engine is connected to the generator, and the generator is connected to the chassis vehicle power supply device. The engine provides mechanical power to the generator, which converts mechanical energy into electrical energy and supplies it to the chassis vehicle power supply device, which in turn supplies it to the first electric motor to achieve electric drive of the chassis vehicle. The motor also drives the plunger pump 2 for high-pressure pumping operations (or drives the liquid supply pump 3 to supply liquid to the plunger pump 2) through axle breakage power take-off from the chassis vehicle, thus achieving electric drive operation of the pumping system.

[0050] In some embodiments, such as Figure 5 As shown, the electric cementing equipment also includes an energy storage unit 71 and a power generation unit 72 mounted on the electric chassis. The energy storage unit 71 and the power generation unit 72 are respectively connected to the input terminal of the first motor, and the power generation unit 72 is also connected to the energy storage unit 71.

[0051] In specific implementations, the energy storage unit 71 and the power generation unit 72 can supply power to the first motor together, and the power generation unit 72 can charge the energy storage unit 71, ensuring the reliability of the power supply to the energy storage unit 71. In some embodiments, such as Figures 3 to 5 As shown, the electrically driven cementing equipment also includes a second electric motor 81, which is connected to the plunger pump 2 via a second transmission device 82.

[0052] The electric cementing equipment also includes an energy storage unit 71 and / or a power generation unit 72 mounted on the electric chassis 1, wherein the energy storage unit 71 and / or the power generation unit 72 are connected to the input terminal of the second motor 81.

[0053] In this embodiment, when the chassis vehicle breaks its axle to drive the liquid supply pump 3, in order to ensure the reliability of the drive (the electric chassis vehicle 1 has insufficient or inconvenient power supply, or the transmission of the piston pump 2 and the liquid supply pump 3 driven by the chassis vehicle is unstable, etc.), the liquid supply pump 3 can be driven by the chassis vehicle alone. A second motor 81 is installed on the electric chassis vehicle, and the second motor 81 is connected to the piston pump 2 through the second transmission device 82. The energy storage unit 71 and / or the power generation unit 72 on the electric chassis vehicle 1 are connected to the second motor 81. The second motor 81 is driven by the discharge of the energy storage unit 71 and / or the power generation unit 72, thereby driving the piston pump 2 to work.

[0054] When the second motor 81 is powered by the energy storage unit 71 and / or the power generation unit 72 to drive the plunger pump 2, the energy storage unit 71 can discharge separately to provide power to the plunger pump 2 according to the actual power consumption of the plunger pump 2. Alternatively, the power generation unit 72 can generate electricity to directly drive the plunger pump 2 and charge the energy storage unit 71 with the excess electricity from the power generation unit 72. The power generation unit 72 can also supply power to the plunger pump 2 together with the energy storage unit 71, thereby realizing the effective utilization of the electrical energy of the energy storage unit 71 and the power generation unit 72, providing reliable power supply to the plunger pump 2 while avoiding energy waste.

[0055] As can be seen from the above, the electric cementing equipment provided in this embodiment can selectively drive the plunger pump 2 and / or the liquid supply pump 3 by means of axle breakage of the chassis vehicle, which effectively improves the driving efficiency and driving stability of the pumping system (including the plunger pump 2 and the liquid supply pump 3).

[0056] Furthermore, the electric cementing equipment also includes a control system, which includes a whole machine control module 91 and a power supply control module 92. The power supply control module 92 is connected to the energy storage unit 71 and / or the power generation unit 72. The whole machine control module 91 is connected to the plunger pump 2 and / or the liquid supply pump 3. The whole machine control module 91 is connected to the power supply control module 92.

[0057] The overall control module 91, as the core of the overall operation control of the electric-driven cementing equipment, is set on the electric-driven chassis 1. It can realize the selection of power supply mode, monitor the power supply operation status, etc.; it can also control the pressure and displacement of the plunger pump 2 and / or the liquid supply pump 3 according to the operation requirements.

[0058] The power supply control module 92 is used to control the power supply of the chassis vehicle and the plunger pump 2, etc. It can detect the working parameters of the chassis 11, the plunger pump 2, the liquid supply pump 3, etc., and control the power supply strategy of the chassis vehicle power supply device, the energy storage unit 71 and / or the power generation unit 72 according to the power consumption of the operation, so as to achieve economical power supply during the operation of the whole machine.

[0059] In some embodiments, the electric cementing equipment further includes a metering tank 93 disposed on the electric chassis 1, the metering tank 93 being connected to the liquid supply pump 3.

[0060] The metering tank 93 is used for metering and storing liquid media used in operations. The liquid supply pump 3 can deliver liquid into the metering tank 93 or draw liquid from the metering tank 93 to supply liquid to the plunger pump 2. The metering tank 93 can be provided with one chamber or divided into multiple chambers to facilitate the metering and storage of liquids.

[0061] In some embodiments, the electric cementing equipment further includes a slurry mixing system mounted on the electric chassis vehicle. The slurry mixing system includes a mixer 94, a slurry mixing tank 95, and a centrifugal pump. The slurry mixing tank 95 is equipped with an agitator. The centrifugal pump is connected to the plunger pump 2. The centrifugal pump and the agitator are driven by an electric motor or by hydraulic power.

[0062] The slurry mixing system is fixed on the electric drive chassis 1 and connected to the pumping system via a manifold. The overall control module 91 includes a slurry mixing control unit, which controls the water and ash supply to the slurry mixing system to achieve a certain density of cement slurry mixing, and supplies cement slurry to the pumping system via a centrifugal pump. A mixer 94 is used to mix water and ash in a specific ratio; a slurry mixing tank 95, as the main component of the slurry mixing operation, can perform slurry mixing and liquid storage functions; an agitator is placed inside the slurry mixing tank 95 for stirring to mix water and ash into cement slurry. The slurry mixing system may also include a densitometer, etc. Water can be supplied to the slurry mixing system through a low-pressure manifold.

[0063] The centrifugal pump and agitator can be driven by a third electric motor, powered by an energy storage unit 71 and / or a power generation unit 72. Alternatively, the centrifugal pump and agitator can be hydraulically driven. This involves configuring another hydraulic pump, with the power output from the first electric motor transmitted to it via a first transmission device 5. The hydraulic pump drives a hydraulic motor, which in turn drives the centrifugal pump and agitator. The specific driving method for the centrifugal pump and agitator is not specifically limited in this invention.

[0064] The above description is merely a preferred embodiment of this utility model and an explanation of the techniques used. Those skilled in the art should understand that the scope of disclosure involved in this utility model is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this utility model.

[0065] Furthermore, although the operations are described in a specific order, this should not be construed as requiring these operations to be performed in the specific order shown or in a sequential order. Multitasking and parallel processing may be advantageous in certain environments. Similarly, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of this invention. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments.

[0066] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

Claims

1. An electrically driven cementing device, characterized in that, The device includes an electric drive chassis and a plunger pump mounted on the electric drive chassis. The electric drive chassis includes a chassis and a first electric motor connected to the chassis. The chassis is connected to the plunger pump via a first transmission device.

2. The electrically driven cementing equipment according to claim 1, characterized in that, The chassis output end is connected to the chassis vehicle drive shaft. The first transmission device includes a transmission box and a first drive shaft. The chassis vehicle drive shaft is connected to the input end of the transmission box, the output end of the transmission box is connected to the first drive shaft, and the first drive shaft is connected to the plunger pump.

3. The electrically driven cementing equipment according to claim 1, characterized in that, The electric cementing equipment also includes a liquid supply pump mounted on the electric chassis, the liquid supply pump being connected to the inlet of the plunger pump, and the chassis being connected to the liquid supply pump via the first transmission device.

4. The electrically driven cementing equipment according to claim 3, characterized in that, The electric-drive cementing equipment also includes a hydraulic pump mounted on the electric-drive chassis. The chassis is connected to a power take-off (PTO), which is connected to the hydraulic pump. The hydraulic pump is connected to the supply pump via a hydraulic motor.

5. The electrically driven cementing equipment according to claim 3, characterized in that, The electric cementing equipment also includes a second electric motor, which is connected to the plunger pump via a second transmission device. The electric cementing equipment also includes an energy storage unit and / or a power generation unit mounted on the electric chassis, which is connected to the input terminal of the second electric motor.

6. The electrically driven cementing equipment according to claim 1, characterized in that, The electric cementing equipment also includes an energy storage unit mounted on the electric chassis. The electric chassis also includes a chassis power supply device and a range extender. The chassis power supply device and the energy storage unit are respectively connected to the input terminal of the first motor. The chassis power supply device and the energy storage unit are also respectively connected to the range extender.

7. The electrically driven cementing equipment according to claim 1, characterized in that, The electric cementing equipment also includes a power generation unit mounted on the electric chassis, which is connected to the input terminal of the first electric motor and is also connected to the chassis power supply device of the electric chassis.

8. The electrically driven cementing equipment according to claim 1, characterized in that, The electric cementing equipment also includes an energy storage unit and a power generation unit mounted on the electric chassis. The energy storage unit and the power generation unit are respectively connected to the input terminal of the first electric motor, and the power generation unit is also connected to the energy storage unit.

9. The electrically driven cementing equipment according to claim 3, characterized in that, The electric cementing equipment also includes a metering tank mounted on the electric chassis, and the metering tank is connected to the liquid supply pump.

10. The electrically driven cementing equipment according to claim 1, characterized in that, The electric cementing equipment also includes a slurry mixing system mounted on the electric chassis. The slurry mixing system includes a mixer, a slurry mixing tank, and a centrifugal pump. The slurry mixing tank is equipped with an agitator. The centrifugal pump is connected to the plunger pump. The centrifugal pump and the agitator are driven by an electric motor or by hydraulic power.

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