An integrated multi-motor fracturing pump and fracturing truck and fracturing sled

Abstract

The utility model provides a kind of integrated multi-motor fracturing pump and fracturing vehicle and fracturing pry, it is related to fracturing equipment field.The fracturing pump includes by crankcase assembly and the two identical distribution box assembly of arrangement at the both ends of crankcase assembly integrated connection after formation integrated structure, power box component with fracturing pump base in bottom, several motors are connected with the input end of two ends distribution box assembly respectively in two groups, and the output end of crankcase assembly is connected with the hydraulic end component.The utility model integrates motor, distribution box, crankcase in fracturing pump power end, provides a kind of fracturing equipment with compact structure, less space occupied, gravity concentration, stable operation, simple transmission, reduce noise, reduce energy consumption, reduce emission, energy saving and environmental protection, and then solve the technical problems of existing electric drive fracturing device, such as complex structure, high requirement to assembly process, overall weight, space size, inconvenient transportation etc.

Description

Technical Field

[0001] This utility model relates to the technical field of fracturing equipment, and more specifically to an integrated multi-motor fracturing pump, fracturing truck, and fracturing skid. Background Technology

[0002] In the process of oil and gas extraction, fracturing equipment is often used to perform fracturing operations on oil and gas wells. Fracturing operations involve injecting fracturing fluid with a certain flow rate and pressure into the well using a fracturing pump, which forces open fractures in the formation, improves the fluidity of oil and gas in the formation, and thus increases the production of oil and gas wells.

[0003] In current oil and gas well production enhancement operations, fracturing equipment mainly consists of mechanically driven fracturing pumps and electrically driven fracturing pumps. Mechanically driven fracturing pumps are powered by diesel engines, while electrically driven fracturing pumps are powered by electric motors. Compared with mechanically driven fracturing pumps, electrically driven fracturing pumps have the advantages of lower noise, lower emissions, and lower energy consumption, meeting the current environmental protection requirements for energy conservation and emission reduction. Therefore, electric fracturing technology has begun to emerge and is gradually becoming a new development trend.

[0004] In conventional motor-driven fracturing equipment, the fracturing pump itself is a separate unit. Before use, the fracturing pump is quickly installed on the transport vehicle using base fracturing bolts. Then, it is connected to the motor, which is fixed on the transport vehicle as the drive component, to form a fracturing truck (or mounted on a fracturing skid to form a fracturing skid). The connection between the motor and the fracturing pump requires a series of transmission components, including the motor output flange, conversion flange I, coupling input flange, coupling, coupling output flange, conversion flange II, and fracturing pump input flange. This not only results in a complex structure and heavy weight, but also, because the motor, the aforementioned transmission components, and the fracturing pump need to be arranged on the same axis, the overall length of the fracturing equipment is relatively long (generally greater than 6 meters), and the floor space occupied is also relatively large, making it inconvenient for installation, use, and transportation. At the same time, the coaxial arrangement also places high demands on the installation process. Therefore, there is an urgent need to design an integrated system for conventional electric motor-driven fracturing equipment, creating a fracturing device that is compact, occupies little space, has a concentrated center of gravity, operates smoothly, has simple transmission, reduces noise, energy consumption, and emissions, and is energy-saving and environmentally friendly. This would solve the technical problems of existing electric motor-driven fracturing equipment, such as complex structure, high requirements for assembly processes, large overall weight, large size, and inconvenient transportation. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of the existing technology by providing an integrated multi-motor fracturing pump, fracturing truck, and fracturing skid. This invention integrates the motor, transfer case, and crankcase at the power end of the fracturing pump, providing a fracturing device that is compact, occupies little space, has a centralized center of gravity, operates smoothly, has simple transmission, reduces noise, energy consumption, and emissions, and is energy-saving and environmentally friendly. This solves the technical problems of existing electrically driven fracturing equipment, such as complex structure, high requirements for assembly processes, large overall weight, large dimensions, and inconvenient transportation.

[0006] The objective of this utility model can be achieved through the following technical measures:

[0007] This utility model discloses an integrated multi-motor fracturing pump, comprising a power box component consisting of a crankcase assembly and two identical transfer case assemblies arranged at both ends of the crankcase assembly, forming an integral structure with a fracturing pump base at the bottom. The main function of the transfer case assembly is to transmit the driving force and rotation of the motor to the crankcase assembly. The crankcase assembly primarily converts rotational torque into linear torque—that is, the transmission pairs in the two transfer case assemblies rotate synchronously under the drive of two identical motors, thereby driving the crankshaft in the crankcase assembly to rotate and the crankshaft connecting rod to oscillate. Simultaneously, the oscillation of the crankshaft connecting rod drives the hydraulic end plunger to linearly extend and retract, squeezing the fracturing fluid in the hydraulic end component, thus compressing the pump. The fracturing fluid, discharged from the hydraulic end component at a certain flow rate and pressure, is injected into the oil well formation to open fractures, ultimately improving the flowability of oil and gas in the formation and increasing the production of the oil and gas well. Several motors, centrally arranged above the crankcase assembly and divided into two groups, are connected to the input ends of the transfer case assemblies at both ends (the two groups of motors provide the same driving force to each transfer case assembly, ensuring synchronous rotation). A hydraulic end component (used for storing and discharging fracturing fluid) is connected to the output end of the crankcase assembly. The transfer case assembly includes a transfer case housing (providing installation space for the driving pinion and driven gear, preventing dust, and improving operational safety), and a transmission pair formed by meshing transmission within the transfer case housing. The system consists of a large driven gear and several small driven gears (the driving force from the motor is first converted into a larger rotational torque by meshing with the large driven gear, and then transmitted to the crankshaft at the next stage. This rotational torque is then converted into linear torque by the crankcase assembly, resulting in a larger output linear torque. This allows for more forceful compression of the fracturing fluid in the hydraulic end components, enabling the fracturing fluid to be discharged from the hydraulic end components with greater flow rate and pressure and injected into the oil well formation to open fractures). Each small driven gear is mounted on a corresponding motor output shaft, and all small driven gears rotate synchronously with the motor output shaft (the small driven gears rotate synchronously with the motor under its drive, thus converting the motor's...). The driving force and rotation are transmitted to the driven large gear meshing with the driving pinion; the crankcase assembly includes a crankcase housing (providing installation space for the crankshaft and crankshaft connecting rods, preventing dust, and improving operational safety), a crankshaft installed in the crankcase housing, and a row of crankshaft connecting rods. The crankshaft connecting rods are hung side by side on the crankshaft cranks, and the two ends of the crankshaft are respectively inserted into the center holes of two driven large gears, and all three rotate synchronously (the driven large gears at both ends achieve synchronous rotation under the drive of two sets of motors and the transmission of the driving pinion, which enables the crankshaft to rotate smoothly, and transmits the larger rotational torque converted from the meshing of the transmission pair to the crankshaft. When the crankshaft rotates smoothly, it will drive the crankshaft connecting rods to swing).A row of hydraulic plungers is installed at the input end of the hydraulic end component. Each plunger is connected to a corresponding crankshaft connecting rod. (While the crankshaft connecting rod oscillates, it also drives the hydraulic plungers to extend and retract linearly, squeezing the fracturing fluid in the hydraulic end component. This causes the fracturing fluid to be discharged from the hydraulic end component at a certain flow rate and pressure and injected into the oil well formation to open fractures, ultimately improving the fluidity of oil and gas in the formation and increasing the production of the oil and gas well.)

[0008] In this invention, the number of motors is equal to the number of driving pinions, and they are connected by splines (ensuring that each driving pinion can rotate synchronously with the motor output shaft under the drive of the corresponding motor).

[0009] In this invention, each transmission pair contains a driven large gear and at least two driving small gears (by having multiple driving small gears meshing with a single driven large gear simultaneously, the force is more evenly distributed and the transmission is smoother; on the other hand, the driven large gear has a larger rotational torque, which ensures that the crankcase assembly can convert into a larger linear torque. This allows for more forceful compression of the fracturing fluid in the hydraulic end component, enabling the fracturing fluid to be discharged from the hydraulic end component with a larger displacement and pressure and injected into the oil well formation to open fractures). The driven large gear and the driving small gears rotate in opposite directions; the two driving small gears have the same diameter and rotation direction (to ensure even force distribution and facilitate uniform arrangement).

[0010] In this invention, the number of hydraulic end plungers and crankshaft connecting rods are the same, and are equal to the number of cranks on the crankshaft (to ensure uniform force distribution and facilitate uniform arrangement).

[0011] The fracturing pump base described in this utility model is a box-beam structure, and bolt holes are machined on the upper surface of the fracturing pump base (which can be quickly connected to the transport vehicle or skid by screwing in the bolts).

[0012] The motors described in this utility model are variable frequency motors of the same model (ensuring that each driving pinion can rotate at the same speed).

[0013] The fracturing truck of this utility model utilizes an integrated multi-motor fracturing pump, which is quickly connected to a transport vehicle by means of an integrated multi-motor fracturing pump base and bolts (the integrated multi-motor fracturing pump and the transport vehicle are equipped to form a fracturing truck according to the needs of use).

[0014] The fracturing skid of this utility model is constructed by quickly connecting the integrated multi-motor fracturing pump to the skid using the fracturing pump base and bolts (the integrated multi-motor fracturing pump and the skid are assembled to form a fracturing skid according to the needs of use).

[0015] The design principle of this utility model is as follows:

[0016] This invention adopts a modular integrated design concept—integrating the crankcase assembly and two identical transfer case assemblies located at both ends of the crankcase assembly into a single, integrated power unit with a fracturing pump base at the bottom. The motors are then centrally located above the crankcase assembly and divided into two groups, each connected to the input ends of the transfer case assemblies. This integrates the motor, transfer case, and crankcase into the fracturing pump's power end. Both sets of motors provide the same driving force to the two transfer case assemblies. The transfer case assembly transmits the motor's driving force and rotation to the crankcase assembly, which converts the rotational torque into linear torque. This linear torque is output to the hydraulic end component, squeezing the fracturing fluid within it. The fracturing fluid is then discharged from the hydraulic end component at a certain flow rate and pressure and injected into the oil well formation to open fractures, ultimately improving the fluidity of oil and gas in the formation and increasing the well's production. Thus, this utility model provides a fracturing pump that is compact in structure, occupies little space, has a concentrated center of gravity, runs smoothly, has simple transmission, reduces noise, reduces energy consumption, reduces emissions, and is energy-saving and environmentally friendly. This solves the technical problems of existing electric fracturing equipment, such as complex structure, high requirements for assembly process, large overall weight, large space size, and inconvenience in transportation.

[0017] More specifically, after integrated design, this utility model replaces the long string of transmission components such as flanges, couplings, and drive shafts between the motor and the fracturing pump in conventional motor-driven fracturing equipment with a transmission pair consisting of large and small gears. This makes the overall structure of the fracturing pump more compact, greatly reducing the overall size of the fracturing pump and occupying less space, which is convenient for the overall layout of the fracturing truck or fracturing skid. On the other hand, it simplifies the transmission, concentrates the center of gravity, and ensures stable operation. Specifically, the transmission mechanism involves the large passive gears at both ends rotating synchronously under the drive of two sets of motors and the transmission of the small active gear. This drives the crankshaft to rotate smoothly, and the large rotational torque generated by the meshing of the transmission pairs is transmitted to the crankshaft. The smooth rotation of the crankshaft then drives the connecting rod to oscillate, which in turn drives the hydraulic plunger to extend and retract linearly. This squeezes the fracturing fluid in the hydraulic end components, causing it to be discharged from the hydraulic end components at a certain flow rate and pressure and injected into the oil well formation to open fractures. Ultimately, this improves the fluidity of oil and gas in the formation and increases the production of the oil and gas well. Furthermore, this invention is motor-driven. Compared with mechanically driven fracturing pumps, motor-driven fracturing pumps have advantages such as lower noise, lower emissions, lower energy consumption, and energy saving and environmental protection, meeting the current environmental protection requirements for energy conservation and emission reduction.

[0018] The technical effects of this utility model are as follows:

[0019] This utility model integrates the motor, transfer case, and crankcase into the power end of the fracturing pump, providing a fracturing equipment that is compact, occupies little space, has a concentrated center of gravity, runs smoothly, has simple transmission, reduces noise, energy consumption, and emissions, and is energy-saving and environmentally friendly. It also solves the technical problems of existing electric fracturing equipment, such as complex structure, high requirements for assembly process, large overall weight, large size, and inconvenient transportation. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the integrated multi-motor fracturing pump of this utility model.

[0021] Figure 2 yes Figure 1 A three-dimensional structural diagram after rotating and removing the transfer case housing.

[0022] Figure 3 yes Figure 1 A three-dimensional structural diagram of the power box.

[0023] The numbers in the diagram are explained as follows: 1. Motor; 2. Power box components; 2-1. Crankcase assembly; 2-1-1. Crankshaft; 2-1-1-1. Crankshaft; 2-1-2. Crankshaft connecting rod; 2-1-3. Crankcase housing; 2-2. Transfer case assembly; 2-2-1. Driving pinion; 2-2-2. Driven gear; 2-2-3. Transfer case housing; 3. Hydraulic end components; 3-1. Hydraulic end plunger; 4. Fracturing pump base. Detailed Implementation

[0024] This utility model will be further described in conjunction with the accompanying drawings:

[0025] like Figures 1-3As shown, this utility model discloses an integrated multi-motor fracturing pump, fracturing truck, and fracturing skid, comprising a power box component 2 formed by integrating a crankcase assembly 2-1 and two identical transfer case assemblies 2-2 arranged at both ends of the crankcase assembly, forming an integral structure, and having a fracturing pump base 4 at the bottom. (The main function of the transfer case assembly 2-2 is to transmit the driving force and rotation of the motor 1 to the crankcase assembly 2-1. The main function of the crankcase assembly 2-1 is to convert rotational torque into linear torque—that is, the transmission pairs in the two transfer case assemblies 2-2 rotate synchronously under the drive of the two identical motors 1, thereby driving the crankshaft 2-1-1 in the crankcase assembly 2-1 to rotate.) The crankshaft connecting rod 2-1-2 oscillates, simultaneously driving the hydraulic plunger 3-1 to extend and retract linearly. This squeezes the fracturing fluid in the hydraulic component 3, causing it to be discharged from the hydraulic component 3 at a certain flow rate and pressure and injected into the oil well formation to open fractures, ultimately improving the flowability of oil and gas in the formation and increasing the production of the oil and gas well. Several motors 1 are centrally arranged above the crankcase assembly 2-1 and divided into two groups, each connected to the input end of the transfer case assemblies 2-2 at both ends. (The two groups of motors 1 provide the same driving force to the two transfer case assemblies 2-2, ensuring synchronous rotation of the two transfer case assemblies 2-2.) The hydraulic end component 3 (used for storing and discharging fracturing fluid) is connected to the output end of the transfer case assembly 2-1; the transfer case assembly 2-2 includes a transfer case housing 2-2-3 (providing installation space for the driving pinion 2-2-1 and the driven gear 2-2-2, preventing dust, and improving operational safety), a driven gear 2-2-2 installed inside the transfer case housing and forming a transmission pair through meshing transmission, and several driving pinions 2-2-1 (the several driving pinions 2-2-1 mesh with the driven gear 2-2-2 to convert the driving force transmitted from the motor 1 into a larger rotational torque before transmitting it to the next stage crankshaft 2-1-1, thus... When the rotational torque is converted into linear torque through the crankcase assembly 2-1, a larger linear torque can be output, which means that the fracturing fluid in the hydraulic end component 3 can be squeezed more forcefully, so that the fracturing fluid is discharged from the hydraulic end component 3 with a larger displacement and pressure and injected into the oil well formation to open the fracture. Each drive pinion 2-2-1 is mounted on the corresponding motor output shaft 1-1, and the drive pinion 2-2-1 rotates synchronously with the motor output shaft 1-1 (the drive pinion 2-2-1 rotates synchronously with the motor 1 under the drive of the motor 1, so that the driving force and rotation of the motor 1 can be transmitted to the driven large gear 2-2-2 meshing with the drive pinion 2-2-1).The crankcase assembly 2-1 includes a crankcase housing 2-1-3 (providing installation space for the crankshaft 2-1-1 and crankshaft connecting rods 2-1-2, preventing dust, and improving operational safety), a crankshaft 2-1-1 installed inside the crankcase housing, and a row of crankshaft connecting rods 2-1-2. The crankshaft connecting rods 2-1-2 are mounted side-by-side on the crankshaft 2-1-1-1. Both ends of the crankshaft 2-1-1 are respectively inserted into the center holes of two driven large gears 2-2-2, and all three rotate synchronously (the driven large gears 2-2-2 at both ends rotate synchronously under the drive of two sets of motors 1 and the transmission of the driving small gear 2-2-1, thus enabling the crankshaft 2-1-1 to move forward). The transmission system rotates smoothly, and the larger rotational torque generated by the meshing of the transmission pairs is transmitted to the crankshaft 2-1-1. The crankshaft 2-1-1, in turn, drives the crankshaft connecting rod 2-1-2 to oscillate during smooth rotation. A row of hydraulic plungers 3-1 is installed at the input end of the hydraulic end component 3, with each plunger 3-1 corresponding to a crankshaft connecting rod 2-1-2. (While the crankshaft connecting rod 2-1-2 oscillates, it also drives the hydraulic plungers 3-1 to extend and retract linearly, squeezing the fracturing fluid in the hydraulic end component 3. This causes the fracturing fluid to be discharged from the hydraulic end component 3 at a certain flow rate and pressure, and then injected into the oil well formation to open fractures, ultimately improving the fluidity of oil and gas in the formation and increasing the production of the oil and gas well.)

[0026] In this invention, the number of motors 1 is equal to the number of driving pinions 2-2-1, and they are connected by splines (ensuring that each driving pinion 2-2-1 can rotate synchronously with the motor output shaft 1-1 under the drive of the corresponding motor 1).

[0027] In this invention, each transmission pair contains a passive large gear 2-2-2 and at least two active small gears 2-2-1. (By simultaneously meshing multiple active small gears 2-2-1 with a passive large gear 2-2-2, the force is more evenly distributed and the transmission is smoother. On the other hand, the passive large gear 2-2-2 has a larger rotational torque, which ensures that the crankcase assembly 2-1 is converted into a larger linear torque. This allows for more forceful compression of the fracturing fluid in the hydraulic end component 3, enabling the fracturing fluid to be discharged from the hydraulic end component 3 with a larger displacement and pressure and injected into the oil well formation to open fractures.) The passive large gear 2-2-2 and the active small gears 2-2-1 rotate in opposite directions. The diameter and rotation direction of the two active small gears 2-2-1 are the same (to ensure uniform force distribution and facilitate uniform arrangement).

[0028] In this utility model, the number of hydraulic end plungers 3-1 and crankshaft connecting rods 2-1-2 are the same, and are all equal to the number of cranks 2-1-1-1 of crankshaft 2-1-1 (to ensure uniform force distribution and facilitate uniform arrangement).

[0029] The fracturing pump base 4 described in this utility model is a box beam structure, and bolt holes are machined on the upper surface of the fracturing pump base (which can be quickly connected to the transport vehicle or skid by screwing in the bolts).

[0030] The motor 1 described in this utility model is a variable frequency motor of the same model (to ensure that each active pinion 2-2-1 can rotate at the same speed).

[0031] The fracturing truck of this utility model utilizes an integrated multi-motor fracturing pump. It is constructed by quickly connecting the integrated multi-motor fracturing pump to the transport vehicle via the fracturing pump base 4 and bolts (the integrated multi-motor fracturing pump and the transport vehicle are assembled to form a fracturing truck according to the needs of use).

[0032] The fracturing skid of this utility model is constructed by quickly connecting the integrated multi-motor fracturing pump to the skid via the fracturing pump base 4 and bolts (the integrated multi-motor fracturing pump and the skid are assembled to form a fracturing skid according to the needs of use).

[0033] The specific usage of this utility model is as follows:

[0034] First, according to the appendix Figures 1-3 Assemble the integrated multi-motor fracturing pump according to the structure and positional relationships shown and described above. Then, according to the usage requirements, quickly connect the assembled integrated multi-motor fracturing pump to the transport vehicle using the fracturing pump base 4 and bolts to form a fracturing truck, or connect it to a skid to form a fracturing skid. Next, move the fracturing truck or fracturing skid to the work site. Subsequently, start each motor 1 simultaneously, and each motor 1 rotates at the same speed, driving its corresponding driving pinion 2-2-1 to rotate synchronously at the same speed; the driven large gears 2-2-2 at both ends achieve synchronous rotation under the drive of the two sets of motors 1 and the transmission of the driving pinions 2-2-1, that is, the driven large gears 2-2-2 mesh with several driving pinions 2-2-1 in the same transmission pair, which can first convert the driving force transmitted from the motor 1 into a larger rotational torque before transmitting it to the next stage crankshaft. 2-1-1, in this way, can drive the crankshaft 2-1-1 to rotate smoothly; when the crankshaft 2-1-1 rotates smoothly, it will drive the crankshaft connecting rod 2-1-2 to swing. While the crankshaft connecting rod 2-1-2 swings, it will drive the hydraulic end plunger 3-1 to extend and retract linearly, squeezing the fracturing fluid in the hydraulic end component 3, so that the fracturing fluid is discharged from the hydraulic end component 3 with a certain displacement and pressure and injected into the oil well formation to open the fracture, ultimately improving the fluidity of oil and gas in the formation and increasing the production of oil and gas wells.

Claims

1. An integrated multi-motor fracturing pump, characterized by: The fracturing pump includes a power box component (2) formed by integrating a crankcase assembly (2-1) and two identical transfer case assemblies (2-2) arranged at both ends of the crankcase assembly, forming an integral structure with a fracturing pump base (4) at the bottom; several motors (1) centrally arranged above the crankcase assembly (2-1) and divided into two groups connected to the input ends of the transfer case assemblies (2-2) at both ends; and a hydraulic end component (3) connected to the output end of the crankcase assembly (2-1); the transfer case assembly (2-2) includes a transfer case housing (2-2-3), a driven large gear (2-2-2) installed in the transfer case housing and forming a transmission pair through meshing transmission, and several driving small gears (2-2-1), each driving small gear (2-2-1) 1) All are mounted on the corresponding motor output shaft (1-1), and the driving pinion (2-2-1) rotates synchronously with the motor output shaft (1-1); the crankcase assembly (2-1) includes a crankcase housing (2-1-3), a crankshaft (2-1-1) installed in the crankcase housing, and a row of crankshaft connecting rods (2-1-2). The crankshaft connecting rods (2-1-2) are mounted side by side on the cranks (2-1-1-1) of the crankshaft (2-1-1). The two ends of the crankshaft (2-1-1) are respectively inserted into the center holes of the two driven large gears (2-2-2), and the three rotate synchronously; a row of hydraulic end plungers (3-1) is provided at the input end of the hydraulic end component (3). The hydraulic end plungers (3-1) are connected to the crankshaft connecting rods (2-1-2) one by one.

2. An integrated multi-motor fracturing pump as claimed in claim 1, characterized in that: The number of motors (1) is equal to the number of driving pinions (2-2-1), and they are connected by splines.

3. An integrated multi-motor fracturing pump as claimed in claim 1, characterized in that: Each of the aforementioned transmission pairs contains one driven large gear (2-2-2) and at least two driving small gears (2-2-1). The driven large gear (2-2-2) and the driving small gears (2-2-1) rotate in opposite directions. The two driving small gears (2-2-1) have the same diameter and rotation direction.

4. An integrated multi-motor fracturing pump as claimed in claim 1, characterized in that: The number of hydraulic end plungers (3-1) and crankshaft connecting rods (2-1-2) is the same, which is equal to the number of cranks (2-1-1-1) of the crankshaft (2-1-1).

5. An integrated multi-motor fracturing pump as claimed in claim 1, wherein: The fracturing pump base (4) is a box beam structure, and bolt holes are machined on the upper surface of the fracturing pump base.

6. An integrated multi-motor fracturing pump as claimed in claim 1, characterized in that: The motor (1) is a variable frequency motor of the same model.

7. A fracturing truck utilizing the integrated multi-motor fracturing pump of claim 1, characterized by: The fracturing vehicle is constructed by quickly connecting an integrated multi-motor fracturing pump to a transport vehicle via a fracturing pump base (4) and bolts.

8. A fracturing sled utilizing the integrated multi-motor fracturing pump of claim 1, wherein: The fracturing skid is constructed by quickly connecting an integrated multi-motor fracturing pump to the skid via a fracturing pump base (4) and bolts.

Images