Well cementation equipment

Abstract

The utility model relates to the technical field of oil and gas field well cementation equipment, and provides well cementation equipment which comprises a skid frame, a power supply system, a motor and a plunger pump, the power supply system, the motor and the plunger pump are arranged on the skid frame, and the power supply system comprises a power generation unit and an energy storage unit. At least one of the power generation unit and the energy storage unit is connected with the motor, the motor is connected with the plunger pump, the skid frame comprises at least one skid block, and the power generation unit, the energy storage unit, the motor and the plunger pump are arranged on the same skid block. Or the power generation unit, the energy storage unit, the motor and the plunger pump are arranged on different skid blocks. The power supply strategy of the motor can be deeply adjusted according to the power utilization condition of well cementation pumping operation, the driving efficiency and the driving stability of the pumping system are improved, the skid frame can be flexibly arranged according to the well cementation operation requirement, well cementation operation in different scenes is facilitated, transition is convenient, and the well cementation cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil and gas exploitation equipment technical field, concretely relates to a well cementing equipment. BACKGROUND

[0002] At present, the domestic well cementing traditional operation mainly adopts the following three ways to drive the well cementing equipment to operate: the first way is to drive the gear box by the engine to drive the plunger pump to carry out the pumping operation, and the power take-off drives the hydraulic system to drive the slurry mixing operation, and this kind of equipment has the problems of high production cost, high maintenance cost and high noise; the second way is that the engine drives the hydraulic system to drive the pumping operation and the slurry mixing operation, and this kind of equipment has the problems of low efficiency of the hydraulic system, aging and oil leakage of the hydraulic oil pipe. The third way is to drive the electric drive well cementing equipment by the external well site power supply mode, but due to the imperfect well site power supply, this mode is used less, can only be used in a few well sites for operation, has poor adaptability and cannot cover the well cementing operation conditions of all well sites. SUMMARY

[0003] The purpose of the embodiment of the utility model is to provide a well cementing equipment to at least solve the technical problems of high production and maintenance cost, low driving efficiency, easy damage and limited application range of the driving system of the well cementing equipment in the prior art.

[0004] In order to solve the above technical problems, the embodiment of the utility model provides a well cementing equipment, which comprises a skid frame, a power supply system, a motor and a plunger pump, the power supply system, the motor and the plunger pump are arranged on the skid frame, the power supply system comprises a power generation unit and an energy storage unit, at least one of the power generation unit and the energy storage unit is connected with the motor, the motor is connected with the plunger pump, the skid frame comprises at least one skid block, the power generation unit, the energy storage unit, the motor and the plunger pump are arranged on the same skid block, or the power generation unit, the energy storage unit, the motor and the plunger pump are arranged on different skid blocks.

[0005] In some embodiments, the power generation unit and the energy storage unit are both connected with the motor, and the power generation unit is also connected with the energy storage unit.

[0006] In some embodiments, the well cementing equipment further comprises a liquid supply pump, the liquid supply pump is arranged on the skid frame and connected with the plunger pump through a low-pressure manifold; and / or

[0007] The liquid supply pump is connected with the first driving motor or the first hydraulic motor; and / or

[0008] The liquid supply pump is a centrifugal pump or a rotor pump.

[0009] In some embodiments, the cementing device further comprises a metering tank arranged on the skid and connected with the liquid supply pump.

[0010] In some embodiments, the cementing device further comprises a slurry mixing system arranged on the skid, the slurry mixing system comprising a mixer, a slurry mixing tank with an agitator arranged therein, and a centrifugal pump connected with the piston pump, the centrifugal pump and the agitator being respectively connected with a second driving motor, or the centrifugal pump and the agitator being respectively connected with the second driving motor through a hydraulic pump and a second hydraulic motor.

[0011] In some embodiments, the electric motor is connected with the piston pump through a connecting device, the connecting device comprising a transmission shaft and / or a shaft coupling.

[0012] In some embodiments, a transmission box is further connected between the electric motor and the piston pump, the transmission box being a gear box or a worm gear box.

[0013] In some embodiments, the cementing device further comprises a control system, the control system comprising a power supply control module and a whole machine control module, the power supply control module being connected with the power supply system, the whole machine control module being connected with the electric motor and the piston pump, and the whole machine control module being connected with the power supply control module.

[0014] In some embodiments, the cementing device further comprises a heat dissipation system arranged on the skid, the heat dissipation system being arranged close to the power supply system and / or the electric motor and connected with the whole machine control module.

[0015] In some embodiments, the power supply system further comprises an external power supply unit, the external power supply unit, the power generation unit, the energy storage unit, the electric motor and the piston pump being arranged on the same skid block, or the external power supply unit, the power generation unit, the energy storage unit, the electric motor and the piston pump being arranged on different skid blocks.

[0016] The utility model discloses an equipment for cementing the embodiment of the utility model provides a kind of, and the power supply system motor and plunger pump are arranged in skid frame with the way of whole machine into skid, the power supply system includes power generation unit and energy storage unit, at least one of the power generation unit and the energy storage unit is connected with the motor, the motor is connected with the plunger pump, the skid frame includes at least one skid block, the power generation unit, energy storage unit, motor and the plunger pump are arranged on the same skid block, or the power generation unit, energy storage unit, motor and the plunger pump are arranged on different skid block, can be according to the power consumption situation depth adjustment power supply strategy of motor of cementing pumping operation, realize the selective power consumption of pumping system, improve the driving efficiency and driving stability of pumping system, and pumping system uses the mode of electric drive can reduce the production, maintenance cost of cementing equipment driving system, reduce driving noise, and the service life of driving system is longer;At the same time, power generation unit, energy storage unit, motor and the plunger pump can form a skid block operation, can also be divided into multiple skid blocks collaborative operation, can be flexibly set skid frame according to cementing operation demand, facilitate cementing operation in different scenarios, convenient to change scene, and can reduce cementing cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in embodiment or prior art description, obviously, the drawings in the following description are only some embodiments in the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor intensity.

[0018] Figure 1 It is the structure schematic view of the cementing equipment of the utility model embodiment;

[0019] Figure 2 It is another structure schematic view of the cementing equipment of the utility model embodiment;

[0020] Figure 3 It is the structure schematic view of external power supply unit of the utility model embodiment;

[0021] Figure 4 It is another structure schematic view of external power supply unit of the utility model embodiment;

[0022] Figure 5 It is the first connection schematic view of motor and plunger pump of the utility model embodiment;

[0023] Figure 6 It is the second connection schematic view of motor and plunger pump of the utility model embodiment;

[0024] Figure 7The third connection schematic diagram of the motor and the plunger pump of the embodiment of the utility model;

[0025] Figure 8 The fourth connection schematic diagram of the motor and the plunger pump of the embodiment of the utility model.

[0026] Reference signs:

[0027] 1-skid frame; 2-motor; 3-plunger pump; 41-power generation unit, 42-energy storage unit, 43-external power supply unit; 51-power supply control module, 52-entire machine control module; 61-liquid supply pump, 62-low pressure manifold, 63-metering tank; 71-mixer, 72-mixed slurry tank; 8-connection device, 81-transmission shaft, 82-transmission box, 83-speed change device; 9-heat dissipation system; 201-first skid block, 202-second skid block; 30-cable. DETAILED DESCRIPTION

[0028] Various aspects and features of the present utility model are described herein with reference to the accompanying drawings.

[0029] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be construed as limiting, but merely as exemplification of the embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the present utility model.

[0030] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present utility model and, together with the general description of the present utility model given above, and the detailed description of the embodiments given below, serve to explain the principles of the present utility model.

[0031] These and other characteristics of the present utility model will become readily apparent to those skilled in the art from the following description, with reference to the accompanying drawings.

[0032] It should also be understood that, while the present utility model has been described above with reference to particular embodiments, many modifications can be made to the present utility model by those skilled in the art without departing from the spirit and scope of the present utility model, which are defined by the claims.

[0033] The above and other aspects, features, and advantages of the present utility model will become apparent from the following detailed description, when taken in conjunction with the accompanying drawings.

[0034] The specific embodiments of the present application will be described hereinafter with reference to the drawings; however, it should be understood that the claimed embodiments are merely examples of the present application, which can be implemented in various ways. Well-known and / or repetitive functions and structures are not described in detail to avoid unnecessary or redundant details that would obscure the present application. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but are merely presented as a basis and representative basis for the claims for teaching those skilled in the art to use the present application in a variety of essentially any suitable detailed structures.

[0035] The present specification can use the phrases "in one embodiment", "in another embodiment", "in yet another embodiment" or "in other embodiments", which can all refer to one or more of the same or different embodiments according to the present application.

[0036] Figure 1 and Figure 2 The structural schematic diagram of the well cementing equipment of the present application embodiment is shown. As shown in Figure 1 and Figure 2 The well cementing equipment provided by the present application embodiment includes a skid 1, a power supply system, a motor 2 and a plunger pump 3, the power supply system, the motor 2 and the plunger pump 3 are arranged on the skid 1, the power supply system includes a power generation unit 41 and an energy storage unit 42, at least one of the power generation unit 41 and the energy storage unit 42 is connected with the motor 2, the motor 2 is connected with the plunger pump 3, the skid 1 includes at least one skid block, the power generation unit 41, the energy storage unit 42, the motor 2 and the plunger pump 3 are arranged on the same skid block, or the power generation unit 41, the energy storage unit 42, the motor 2 and the plunger pump 3 are arranged on different skid blocks.

[0037] Among them, the motor 2 and the plunger pump 3 constitute the pumping system of the well cementing equipment, the motor 2 is at least one, at least one motor 2 drives the plunger pump 3 to work, and completes the high-pressure pumping operation of the cement slurry in the well cementing operation.

[0038] The power generation unit 41 includes an engine and a generator, the engine is connected with the generator, and the generator is connected with the plunger pump 3. The engine is used to provide mechanical power for the generator, the generator is used to convert mechanical energy into electrical energy, and supply the electrical energy to the motor 2, realize the electric drive of the motor 2, and then drive the plunger pump 3 to carry out the high-pressure pumping operation, realize the electric drive operation of the pumping system.

[0039] The engine is a diesel engine or other power machine. When the engine is a diesel engine, the energy generated by the combustion of diesel fuel can be converted into mechanical energy and transmitted to the generator, and then converted into electrical energy by the generator. The engine and the generator are at least one. Multiple generators can be connected to the switchboard to supply power to the motor 2 to drive the plunger pump 3 for high-pressure pumping operation. The power generation unit 41 can also include a generator control system connected to the engine and the generator. The generator control system can control the engine to start, stop, measure data, display data, and provide fault protection. The generator control system can also control the generator to measure, display, and protect the power.

[0040] Due to the low load rate of a single large motor, the power supply efficiency is relatively low. The power generation unit of the present embodiment uses multiple small power generators in parallel, and the load rate of each motor is relatively high, so the power supply efficiency is relatively high.

[0041] The energy storage unit 42 is a unit that can store and release electrical energy when needed. The energy storage unit 42 includes a battery pack and a battery management system. The battery pack is designed in a modular manner and consists of a number of batteries connected in series and parallel, which is used to power the motor 2 to achieve electric drive of the motor 2, and then drive the plunger pump 3 for high-pressure pumping operation, and realize the electric drive operation of the pumping system. The battery management system is used to measure the voltage, current, temperature and other basic parameters of the battery pack, prevent overcharging and overdischarging of the battery, calculate and analyze the remaining capacity and health status of the battery, and timely report abnormal information to prolong the service life of the battery.

[0042] The energy storage unit 42 can also include a charging module connected to the battery pack. The charging module mainly includes a current limiting module and a rectifier module. The alternating current input from the charging module input end becomes direct current after the current limiting module and the rectifier module to supply power to the battery pack.

[0043] It can be understood that when the energy storage unit 42 is used to power the motor 2, the motor side voltage value ≤ the energy storage unit side voltage value, that is, the power consumption of the pumping system ≤ the discharge capacity of the energy storage unit, to ensure that the energy storage unit 42 is used to supply sufficient power to the pumping system and ensure the reliable operation of the pumping system. Before the motor 2 and the plunger pump 3 perform pumping operation, the charging module charges the energy storage unit 42, and the energy storage unit 42 directly drives the motor 2 to work.

[0044] In addition to the battery pack as described above, the energy storage unit 42 can also be configured as a super capacitor. The super capacitor replaces the battery pack and has the characteristics of large capacitance and fast charging and discharging, which can realize the impact compensation of the power of the load system such as the pumping system, and improve the stability of the load system. In the present embodiment, the battery pack is taken as an example to specifically describe the energy storage unit.

[0045] In the embodiment, the generator of the power generation unit 41 and the battery pack of the energy storage unit 42 are connected with the motor 2 through a cable, the power supply strategy of the motor 2 is deeply adjusted according to the power consumption of the motor 2, and selective power consumption of the pumping system is realized. That is, the motor 2 can be powered by the power generation unit 41 or the energy storage unit 42, or can be powered by the power generation unit 41 and the energy storage unit 42 at the same time. For example, when the pumping pressure required by the plunger pump 3 is small, the motor 2 can be powered by the power generation unit 41 or the energy storage unit 42; when the pumping pressure required by the plunger pump 3 is large, the motor 2 can be powered by the power generation unit 41 and the energy storage unit 42 at the same time. The simultaneous power supply can improve the driving efficiency of the motor 2 and the pumping efficiency of the plunger pump 3. The power consumption of the motor 2 is determined in advance by the pumping parameters (pumping pressure, pumping flow) of the plunger pump 3, the pumping volume of the pumping system, the working parameters of the motor 2, and the like.

[0046] The power supply system, the motor 2, the plunger pump 3 and the like can be arranged and integrated into a complete skid 1 to form a skid block for cementing operation, and the device has high integration degree and is convenient to transfer; the power supply system, the motor 2 and the plunger pump 3 can also be divided into multiple skid blocks (for example, the power supply system forms a power supply skid block, and the motor 2 and the plunger pump 3 form a load skid block) to cooperate, so that different components can be flexibly arranged, and the transfer is convenient, and the cementing operation demand of different well site environments can be met.

[0047] The cementing device provided by the embodiment of the utility model adopts the mode of whole machine into skid to arrange the power supply system, the motor 2 and the plunger pump 3 on the skid 1, the power supply system includes the power generation unit 41 and the energy storage unit 42, at least one of the power generation unit 41 and the energy storage unit 42 is connected with the motor 2, the motor 2 is connected with the plunger pump 3, the skid 1 includes at least one skid block, the power generation unit 41, the energy storage unit 42, the motor 2 and the plunger pump 3 are arranged on the same skid block, or the power generation unit 41, the energy storage unit 42, the motor 2 and the plunger pump 3 are arranged on different skid blocks, the power supply strategy of the motor 2 can be deeply adjusted according to the power consumption of the cementing pumping operation, selective power consumption of the pumping system is realized, the driving efficiency and the driving stability of the pumping system are improved, the pumping system adopts the mode of electric driving, the production and maintenance cost of the driving system of the cementing device is reduced, the driving noise is reduced, and the service life of the driving system is long; at the same time, the power generation unit 41, the energy storage unit 42, the motor 2 and the plunger pump 3 can form a skid block operation, or can cooperate with multiple skid blocks, the skid 1 can be flexibly arranged according to the cementing operation demand, the cementing operation in different scenes is convenient, the transfer is convenient, the cementing cost is reduced.

[0048] Specifically, compared with the diesel-driven cementing equipment, the cementing equipment provided by the embodiment has small pollution, low noise and better economy. For example, in order to meet the extreme high-power operation condition, the conventional diesel-driven cementing equipment needs to be configured with a high-power engine, and in the operation condition with small power, power waste will be caused. The application can supply power according to the specific power demand of the plunger pump 3 by using the power generation unit 41 and / or the energy storage unit 42, thereby effectively reducing the power waste. In addition, the embodiment can adopt a power supply mode mainly using energy storage electric drive and supplemented by fuel power generation, which can effectively reduce the operation cost. Compared with the hydraulic-driven cementing equipment, the cementing equipment provided by the embodiment drives the electric motor 2 through the power supply system, and then drives the plunger pump 3 to perform pumping operation, so that the transmission efficiency is high, the fuel consumption rate is lower under the same power, and there is no hydraulic oil leakage, which reduces oil pollution and is more environmentally friendly. Compared with the electric-driven cementing equipment supplied by the external well site, the cementing equipment provided by the embodiment can solve the power supply problem of the well site with imperfect power supply by using energy storage power generation, and can directly use the cementing equipment for operation, that is, the cementing equipment can be used in the well site with imperfect power supply, and has wide application range.

[0049] When the power generation unit 41 and the energy storage unit 42 are connected to the electric motor 2, the power generation unit 41 can also be connected to the energy storage unit 42, and the power generation unit 41 can charge the energy storage unit 42, and the power generation unit 41 can start or stop discharging according to the charging amount of the energy storage unit 42.

[0050] The scheme that the power generation unit 41 charges the energy storage unit 42 is specifically as follows:

[0051] The external power supply and the generator for charging the battery pack are connected to the rectifier module, and the alternating current generated by the external power supply and the generator is converted to direct current by the rectifier module to charge the battery pack or supply power to the load (the electric motor 2). The battery pack can supply power to the load after being converted by the direct current conversion module, and the battery charging can also be realized. At the same time, the battery pack can be charged by using the charging pile.

[0052] The power generation unit 41 can charge the energy storage unit 42 alone, or can supply power to the energy storage unit 42 while supplying power to the motor 2. When the motor 2 is powered by the power supply system, the motor 2 can be powered by the energy storage unit 42 alone according to the actual operation power consumption of the cementing operation, or the motor 2 can be powered by the energy storage unit 42 and the power generation unit 41 simultaneously while the motor 2 is operated by the power generation unit 41. The motor 2 can be powered by the energy storage unit 42 alone to meet different operation power consumption requirements, improve power supply efficiency and power supply economy (avoid waste of power generation unit 41 power, etc.), and ensure continuous and sufficient power supply to the motor 2, ensuring smooth and reliable operation of the power supply system and the pumping system. For example, when the power generation unit 41 and the energy storage unit 42 jointly supply power to the motor 2 to improve power supply efficiency, the power generation unit 41 has sufficient power, but the power of the energy storage unit 42 decreases continuously as the power supply continues. As the power stored in the energy storage unit 42 decreases, continuing to power the motor 2 by the power generation unit 41 alone will result in low power supply efficiency of the motor 2. At this time, the power generation unit 41 can transfer excess power to the energy storage unit 42 to charge the energy storage unit 42, and then the energy storage unit 42 and the power generation unit 41 can continue to jointly power the motor 2 to ensure the power supply efficiency of the motor 2 and ensure the smooth and continuous power supply. For example, when the motor 2 is powered by the power generation unit 41, and the excess power of the power generation unit 41 is discharged to the energy storage unit 42 to charge the energy storage unit 42, if the operation power consumption is low, the energy storage unit 42 is not needed to power the motor 2, which reduces energy waste and improves power supply economy.

[0053] In some embodiments, the skid rack 1 includes at least one skid block, and the power supply system further includes an external power supply unit 43, which is arranged on the same skid block as the power generation unit 41, the energy storage unit 42, and the motor 2, or which is arranged on different skid blocks from the power generation unit 41, the energy storage unit 42, and the motor 2.

[0054] If the power supply conditions of the operation well site meet the operation requirements of the cementing equipment, the external power supply unit 43 (such as a well site power source) can be used to drive the motor 2, and then drive the plunger pump 3 to operate. The external power supply unit 43 can not only provide power to the motor 2, but also charge the energy storage unit 42, realize power supply under different operation conditions of the cementing equipment, improve the application range of the cementing equipment, and operate in the presence or absence of a power grid. The external power supply unit 43 is mainly composed of a frequency converter and a voltage converter, and is a device that converts high-voltage power to the required voltage of the load system (such as the above-mentioned pumping system).

[0055] The power supply scheme of the external power supply unit 43 and the energy storage unit 42 is as follows:

[0056] When the power consumption of the pumping system is less than the discharge capacity of the battery pack, the energy storage unit 42 is directly discharged to supply power to the motor 2;

[0057] When the power consumption of the pumping system is greater than the discharge capacity of the battery pack, the well site power supply is used to supply power, and the AC power is converted into DC power by the voltage rectification module to charge the battery pack or supply power to the motor 2. That is, the well site power supply can charge the energy storage unit 42 or directly supply power to the motor 2.

[0058] In this embodiment, since the cementing equipment is configured with a generator and an external power supply cabinet, full coverage of the well site can be achieved. In the case of network power at the well site, cementing operation can be performed through the external power supply unit 43, saving operation cost. In the case of no power at the well site, cementing operation can be performed through the generator and / or the energy storage unit 42.

[0059] As shown in Figure 3 , the external power supply unit 43 and other components such as the motor 2 and the plunger pump 3 can be integrated and installed on one skid, facilitating the use of the external power supply unit 43 for power supply; the external power supply unit 43 can also be installed on a skid as shown in Figure 4 , and the external power supply unit 43 provided on the first skid 201 is connected to the load components provided on other skids (for example, the second skid 202) through the cable 30, and the skids work together to facilitate the disassembly and assembly of the external power supply unit 43, thereby facilitating the transfer of the cementing equipment, improving the versatility of the cementing equipment, and reducing the production cost of the cementing equipment. For example, the second skid 202 can be suitable for different well sites, and the cementing equipment only needs to replace the first skid 201 when operating in different well sites.

[0060] In some embodiments, as shown in Figure 1 and Figure 2 , the cementing equipment further comprises a control system, the control system comprises a power supply control module 51 and a whole machine control module 52, the power supply control module 51 is connected with the power supply system, the whole machine control module 52 is connected with the motor 2 and the plunger pump 3, and the whole machine control module 52 is connected with the power supply control module 51.

[0061] The power supply control module 51 is arranged close to the generator unit 41 and the energy storage unit 42, and is used for controlling the power supply system. The power supply control module 51 can detect the working parameters of each generator set and the power consumption of the operation, control the power supply strategy of the generator and / or the battery pack of the energy storage unit 42, realize the mutual interaction and control instruction execution between each generator set, between each battery pack, or between the generator set and the battery pack, and realize the selection of economical power supply during the whole machine operation.

[0062] The whole machine control module 52 is arranged on the skid 1 and serves as a whole machine operation control core of the cementing equipment. The whole machine control module 52 can realize selection of a power supply mode, monitoring of a power supply operation state, and the like. The whole machine control module 52 can also control pressure and displacement of the plunger pump 3 according to operation requirements. The whole machine control module 52 is preferably arranged close to the plunger pump 3, so as to timely and accurately monitor the operation of the plunger pump 3 which is the final pumping equipment.

[0063] The power supply control module 51 can be a module for controlling only the power generation unit 41, or can include the battery management system described above to realize accurate control of the power generation unit 41 and the energy storage unit 42.

[0064] In the embodiment, the power supply control module 51 is separately arranged, so as to facilitate accurate control of the power supply of the motor 2, facilitate arrangement, and reduce the use of cables (excessive cables can be damaged).

[0065] As shown in Figure 1 The power supply system further includes a liquid supply pump 61 arranged on the skid 1 and connected to the plunger pump 3 through a low-pressure manifold 62.

[0066] The liquid supply pump 61 delivers liquid at a certain pressure to the plunger pump 3 through the low-pressure manifold 62. The low-pressure manifold 62 is used to deliver low-pressure fluid to the plunger pump 3, so as to realize pumping of high-pressure fluid by the plunger pump 3.

[0067] The liquid supply pump 61 is connected to the first driving motor or the first hydraulic motor. That is, the liquid supply pump 61 can be driven to work by the first driving motor or the first hydraulic motor.

[0068] The first driving motor can be the motor 2 described above, and the motor 2 is used to realize electric driving of the liquid supply pump 61, that is, the motor 2 is used to provide driving force for different loads to realize linkage electric driving of the loads. The first driving motor can also be an independent driving motor arranged on the skid 1.

[0069] The liquid supply pump 61 can also be driven to work by a hydraulic driving system, for example, the motor 2 drives a hydraulic pump, the hydraulic pump drives the first hydraulic motor, and the first hydraulic motor drives the liquid supply pump 61. Alternatively, the liquid supply pump 61 is a centrifugal pump or a rotor pump, and has high pumping efficiency.

[0070] In some embodiments, as shown in Figure 1 and Figure 2As shown, the cementing equipment further comprises a metering tank 63 arranged on the skid 1 and connected with the liquid supply pump 61. The metering tank 63 is used for metering and storing the liquid medium for the operation, and the liquid supply pump 61 can deliver liquid into the metering tank 63 or draw liquid from the metering tank 63 to supply the liquid to the piston pump 3. The metering tank 63 can be provided with one chamber or divided into multiple chambers to facilitate the metering and storage of the liquid.

[0071] In some embodiments, as shown in Figure 2 As shown, the cementing equipment further comprises a slurry mixing system arranged on the skid 1, which comprises a mixer 71, a slurry tank 72 provided with an agitator and a centrifugal pump connected with the piston pump 3. The centrifugal pump and the agitator are respectively connected with a second driving motor, or the centrifugal pump and the agitator are respectively connected with the second driving motor through a hydraulic pump and a second hydraulic motor.

[0072] The slurry mixing system is fixed on the skid 1 and connected with the pumping system through a manifold. The whole machine control module 52 comprises a slurry mixing control unit for controlling the water supply and the amount of cement of the slurry mixing system, realizing the mixing of cement slurry with a certain density and providing the cement slurry to the pumping system through the centrifugal pump. The mixer 71 is used for mixing water and cement in a certain ratio; the slurry tank 72 is used as the main component of the slurry mixing operation and can realize the mixing and storage of the liquid; the agitator is arranged in the slurry tank 72 and used for stirring to mix the water and the cement into the cement slurry. The slurry mixing system can further comprise a densimeter, etc. The water can be delivered into the slurry mixing system through a low-pressure manifold.

[0073] The second driving motor can be the electric motor 2 described above, and the centrifugal pump and the agitator are driven by the electric motor 2, and the electric motor 2 is powered by the energy storage unit 42, i.e. the electric driving of the slurry mixing system is realized by using the energy storage unit 42. The second driving motor can also be other independent driving motor.

[0074] The centrifugal pump and the agitator can also be hydraulically driven. That is, the electric motor 2 can be configured to drive a hydraulic pump, the hydraulic pump drives a second hydraulic motor, and the second hydraulic motor drives the centrifugal pump and the agitator.

[0075] The centrifugal pump and the agitator can be driven by the same driving system, for example, when the driving system drives the agitator to work, the centrifugal pump can be simultaneously driven to start; the centrifugal pump and the agitator can also be driven by different driving systems. The use of different driving systems can facilitate the separate work of the centrifugal pump and the agitator, for example, the flow of the centrifugal pump and the stirring force of the agitator can be accurately controlled through different driving systems. The specific driving mode of the centrifugal pump and the agitator is not specifically limited in the present application.

[0076] In some embodiments, as shown in Figures 5 to 7As shown, the electric motor 2 is connected with the plunger pump 3 through a connecting device 8, which includes a transmission shaft 81 and / or a shaft coupling.

[0077] In some embodiments, as shown in Figure 6 and Figure 7 As shown, a transmission box 82 is further connected between the electric motor 2 and the plunger pump 3 to realize effective transmission of power, which is a gear box or a worm gear box. As shown in Figure 6 The transmission box 82 is arranged between the electric motor 2 and the plunger pump 3, and the output end of the electric motor 2 and the input end of the transmission box 82 are connected through a first transmission shaft, and the output end of the transmission box 82 and the plunger pump 3 are connected through a second transmission shaft.

[0078] As shown in Figure 7 In this embodiment, two electric motors 2 are provided, and the two electric motors 2 transmit power through the same transmission box 82, which can realize centralized transmission of power. In this embodiment, the transmission box 82 is connected to the output end of the electric motor 2, and in other embodiments, the transmission box 82 can be arranged close to the plunger pump 3, and other connecting devices 8 (such as shaft couplings) can also be arranged between the transmission box 82 and the electric motor 2 or between the transmission box 82 and the plunger pump 3.

[0079] Optionally, as shown in Figure 5 and Figure 7 The output end of the electric motor 2 is connected with a speed changing device 83 to realize speed increasing, speed reducing or constant speed transmission of power from the electric motor 2 to the plunger pump 3.

[0080] In other embodiments, as shown in Figure 8 The electric motor 2 and the plunger pump 3 can be directly connected, that is, the electric motor 2 is directly fixed on the plunger pump 3. Each electric motor 2 is fixed on the plunger pump 3 after being connected with a speed changing device 83.

[0081] In some embodiments, as shown in Figure 1 and Figure 2 As shown, the well cementing equipment further comprises a heat dissipation system 9 arranged on the skid 1, which is arranged close to the power supply system and / or the electric motor 2 and is connected with the whole machine control module 52.

[0082] The heat dissipation system 9 provides heat dissipation for the electric motor 2, the energy storage unit 42, etc. The heat dissipation system 9 uses liquid cooling method for cooling. Liquid circulation pipes are installed in each battery module and the electric motor 2, and the heat in the battery pack is taken out by circulating cooling liquid and then exchanged with the external cold water system. The temperature of the component to be cooled is detected by a temperature sensor, and when the temperature exceeds a limited value, the circulation pipeline is started, and liquid is used for heat dissipation, so as to ensure that the battery pack and the electric motor 2 are in a suitable temperature range.

[0083] The chilled water in the chilled water system can be equipped with an additional water cooling device, or it can exchange heat with the liquid during operation. That is, the heat dissipation system 9 does not need to be equipped with an additional power source, which can reduce energy consumption.

[0084] 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.

[0085] 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.

[0086] 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. A cementing device, characterized in that, The device includes a skid, a power supply system, an electric motor, and a plunger pump. The power supply system, the electric motor, and the plunger pump are mounted on the skid. The power supply system includes a power generation unit and an energy storage unit. At least one of the power generation unit and the energy storage unit is connected to the electric motor. The electric motor is connected to the plunger pump. The skid includes at least one skid block. The power generation unit, the energy storage unit, the electric motor, and the plunger pump are mounted on the same skid block, or the power generation unit, the energy storage unit, the electric motor, and the plunger pump are mounted on different skid blocks.

2. The cementing equipment according to claim 1, characterized in that, Both the power generation unit and the energy storage unit are connected to the electric motor, and the power generation unit is also connected to the energy storage unit.

3. The cementing equipment according to claim 1, characterized in that, The cementing equipment also includes a fluid supply pump, which is mounted on the skid and connected to the plunger pump via a low-pressure manifold; and / or The liquid supply pump is connected to the first drive motor or the first hydraulic motor; and / or The liquid supply pump is a centrifugal pump or a rotary pump.

4. The cementing equipment according to claim 3, characterized in that, The cementing equipment also includes a metering tank, which is mounted on the skid and connected to the liquid supply pump.

5. The cementing equipment according to claim 3, characterized in that, The cementing equipment also includes a mixing system mounted on the skid. The mixing system includes a mixer, a mixing tank, and a centrifugal pump. The mixing tank is equipped with an agitator. The centrifugal pump is connected to the plunger pump. The centrifugal pump and the agitator are respectively connected to a second drive motor. Alternatively, the centrifugal pump and the agitator are respectively connected to the second drive motor via a hydraulic pump and a second hydraulic motor.

6. The cementing equipment according to claim 1, characterized in that, The electric motor is connected to the plunger pump via a connecting device, which includes a drive shaft and / or a coupling.

7. The cementing equipment according to claim 6, characterized in that, A transmission box, which is a gearbox or a worm gearbox, is also connected between the electric motor and the plunger pump.

8. The cementing equipment according to claim 1, characterized in that, The cementing equipment also includes a control system, which includes a power supply control module and a machine control module. The power supply control module is connected to the power supply system, and the machine control module is connected to the electric motor and the plunger pump. The machine control module is also connected to the power supply control module.

9. The cementing equipment according to claim 8, characterized in that, The cementing equipment also includes a heat dissipation system mounted on the skid, which is located near the power supply system and / or the motor and connected to the overall control module.

10. The cementing equipment according to claim 1, characterized in that, The power supply system also includes an external power supply unit. The external power supply unit, the power generation unit, the energy storage unit, the motor and the plunger pump are mounted on the same skid, or the external power supply unit, the power generation unit, the energy storage unit, the motor and the plunger pump are mounted on different skids.

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