Fracturing equipment test system

Abstract

The utility model discloses a fracturing equipment test system, which relates to the technical field of fracturing technology. The disclosed fracturing equipment test system includes: a needle valve, which is connected to the outlet of the plunger pump of the fracturing equipment, and the needle valve has a needle valve cylinder; a hydraulic component, which includes a hydraulic oil tank, a hydraulic pump and an electric proportional valve, the oil inlet of the hydraulic pump is connected to the hydraulic oil tank, the oil outlet of the hydraulic pump is connected to the electric proportional valve, and the electric proportional valve is connected to the needle valve cylinder; and a remote control unit, which is communicatively connected to the hydraulic component, and the remote control unit adjusts the needle valve cylinder by controlling the electric proportional valve. The utility model improves the safety of the fracturing equipment test and debugging process.

Description

Technical Field

[0001] The present application relates to the technical field of fracturing technology, and in particular to a fracturing equipment testing system. Background Art

[0002] Fracturing trucks and other pressure equipment must be tested before leaving the factory or when the product is finalized. During the test, it is necessary to verify the ability of the fracturing truck's plunger pump to provide continuous ultra-high pressure fracturing fluid.

[0003] In the related art, adjustable ultra-high pressure fracturing fluid is usually produced by manually adjusting the opening of a needle valve connected to a plunger pump.

[0004] However, manual adjustment of the opening of the needle valve is completely dependent on manual operation. Due to the high noise level at the fracturing truck test site, on-site manual debugging poses a great health and safety hazard. Utility Model Content

[0005] The main purpose of the utility model is to provide a fracturing equipment test system, aiming to solve the technical problem of insufficient safety of fracturing equipment test.

[0006] In order to achieve the above-mentioned purpose, the utility model proposes a fracturing equipment test system, comprising:

[0007] A needle valve is connected to the outlet of the plunger pump of the fracturing equipment, and has a needle valve cylinder;

[0008] A hydraulic assembly, the hydraulic assembly includes a hydraulic oil tank, a hydraulic pump and an electric proportional valve, the oil inlet of the hydraulic pump is connected to the hydraulic oil tank, the oil outlet of the hydraulic pump is connected to the electric proportional valve, and the electric proportional valve is connected to the needle valve cylinder; and

[0009] A remote control unit is connected to the hydraulic assembly for communication, and the remote control unit adjusts the needle valve cylinder by controlling the electric proportional valve.

[0010] In one embodiment, the needle valve cylinder is divided into a rod chamber and a rodless chamber by a piston;

[0011] The hydraulic assembly also includes a reversing valve, the inlet of the reversing valve is connected to the electric proportional valve, the first working oil port of the reversing valve is connected to the rodless chamber, the second working oil port of the reversing valve is connected to the rod chamber, the oil return port of the reversing valve is connected to the hydraulic oil tank, and the reversing valve is in communication connection with the remote control unit;

[0012] The reversing valve has a first state and a second state. When the reversing valve is in the first state, the oil inlet is connected to the first working oil port; when the reversing valve is in the second state, the oil inlet is connected to the second working oil port.

[0013] The remote control unit can control the reversing valve to switch between the first state and the second state.

[0014] In one embodiment, the reversing valve is a Y-type mid-position three-position four-way reversing valve, and the reversing valve also has a third state. When the reversing valve is in the third state, the first working oil port and the second working oil port are both connected to the return oil port.

[0015] In one embodiment, the hydraulic assembly further includes a hydraulic lock, which is disposed between the oil inlet and the electric proportional valve.

[0016] In one embodiment, the hydraulic assembly further includes a double hydraulically controlled one-way valve, the first end of which is respectively connected to the first working oil port and the second working oil port, and the second end of which is respectively connected to the rod chamber and the rodless chamber.

[0017] In one embodiment, the hydraulic assembly further includes a filter and a bypass valve. The filter is arranged between the electric proportional valve and the hydraulic pump, and the bypass valve and the filter are arranged in parallel.

[0018] In one embodiment, the hydraulic assembly further includes a relief valve, one end of which is connected to the oil outlet of the hydraulic pump, and the other end of which is connected to the hydraulic oil tank.

[0019] In one embodiment, the remote control unit comprises:

[0020] Host computer;

[0021] A hydraulic component controller, the hydraulic component controller is respectively connected to the host computer and the hydraulic component for communication; and

[0022] The fracturing equipment controller is connected to the host computer for communication.

[0023] In one embodiment, the hydraulic assembly further includes a pressure gauge and a pressure sensor, and the pressure gauge and the pressure sensor are installed at the oil outlet of the hydraulic pump;

[0024] Wherein, the pressure sensor is communicatively connected with the hydraulic component controller.

[0025] In one embodiment, the system further comprises a fracturing fluid supply device, the fracturing fluid supply device being in communication with the fracturing device;

[0026] The remote control unit also includes a fluid supply device controller, which is communicatively connected to the fracturing fluid supply device and the host computer respectively.

[0027] In the technical solution of the utility model, the electric proportional valve of the hydraulic component is connected to the needle valve cylinder of the needle valve, and the remote control unit is communicatively connected to the hydraulic component, so that the remote control unit can adjust the extension or retraction of the needle valve cylinder by controlling the electric proportional valve.

[0028] Therefore, the utility model uses a remote control unit to remotely control the opening of the electric proportional valve in the hydraulic assembly, thereby remotely adjusting the stroke of the needle valve cylinder, and then remotely controlling the opening of the needle valve. Therefore, the utility model can realize the remote control of the opening of the needle valve at the plunger pump of fracturing equipment such as a fracturing truck, greatly improving the safety of the fracturing equipment test and debugging process, avoiding the harm caused by noise to the human body, and reducing the risk of mechanical injury. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0030] Figure 1 A structural schematic diagram of an embodiment of a fracturing equipment test system provided by the utility model;

[0031] Figure 2 for Figure 1 Schematic diagram of hydraulic components;

[0032] Figure 3 A structural schematic diagram of another embodiment of the fracturing equipment test system provided by the utility model;

[0033] Figure 4 A control schematic diagram of an embodiment of a fracturing equipment test system provided by the utility model.

[0034] Description of Figure Numbers:

[0035] 10. Needle valve; 11. Needle valve cylinder; 111. Rodless chamber; 112. Rod chamber; 20. Hydraulic assembly; 21. Hydraulic oil tank; 22. Hydraulic pump; 23. Electric proportional valve; 24. Reversing valve; 25. Hydraulic lock; 26. Overflow valve; 27. Filter; 28. Bypass valve; 29-Dual hydraulic control one-way valve; 30. Remote control unit; 31. Upper computer; 32. Hydraulic assembly controller; 33. Fracturing equipment controller; 34. Fluid supply equipment controller; 40-Fracturing fluid supply equipment.

[0036] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0040] See also Figure 1 The utility model provides a fracturing equipment test system, which includes a needle valve 10 , a hydraulic assembly 20 and a remote control unit 30 .

[0041] Among them, the needle valve 10 is connected to the outlet of the plunger pump of the fracturing equipment, and the needle valve 10 has a needle valve cylinder 11; the hydraulic component 20, the hydraulic component includes a hydraulic oil tank 21, a hydraulic pump 22 and an electric proportional valve 23, the oil inlet of the hydraulic pump 22 is connected to the hydraulic oil tank 21, the oil outlet of the hydraulic pump 22 is connected to the electric proportional valve 23, and the electric proportional valve 23 is connected to the needle valve cylinder 11; the remote control unit 30 is communicatively connected to the hydraulic component, and the remote control unit 30 can adjust the needle valve cylinder 11 by controlling the electric proportional valve 23.

[0042] Specifically, the fracturing equipment in this embodiment is described by taking a fracturing truck as an example. It is understandable that the fracturing truck is a special vehicle used to inject high-pressure, large-displacement fracturing fluid into the well, press the formation open and squeeze the proppant into the crack. The plunger pump is a key part of the fracturing truck, which can provide a higher pressure and provide the necessary power support for the fracturing operation, so that water, sand, cement and chemical additives are mixed and injected into the well. It can be seen that the stable operation of the plunger pump in the fracturing truck has an important impact on the output of the entire equipment. Therefore, it is necessary to verify the ability of the plunger pump to provide continuous ultra-high pressure fracturing fluid before the fracturing truck product is finalized or shipped. In the plunger pump verification process, adjustable ultra-high pressure fracturing fluid can be generated by adjusting the opening of the needle valve 10 connected to the outlet of the plunger pump. It is understandable that the needle valve 10 includes a needle valve cylinder 11, and the needle valve cylinder 11 includes a cylinder body and a piston movable in the cylinder body, and the piston divides the cavity in the cylinder body into two cavities with a rod cavity 112 and a rodless cavity 111.

[0043] In this embodiment, the opening of the needle valve 10 is controlled by the hydraulic assembly 20. Specifically, the hydraulic oil tank 21 of the hydraulic assembly 20 is connected to the hydraulic pump 22. It should be noted that, in order to ensure the control accuracy, a low-flow hydraulic pump 22 can be selected. Generally speaking, the flow rate of the low-flow hydraulic pump 22 is usually less than 10m3 / h. The oil outlet of the hydraulic pump 22 is connected to the main oil supply pipeline. Among them, an electric proportional valve 23 is arranged on the main oil supply pipeline, that is, the inlet end of the electric proportional valve 23 is connected to the oil outlet of the hydraulic pump 22, and the outlet end of the electric proportional valve 23 is connected to the rodless chamber 111 or the rod chamber 112 of the needle valve 10, so as to supply oil to the rodless chamber 111 or the rod chamber 112, push the needle valve 10 to move and adjust its opening. Since the electric proportional valve 23 has the functions of position control, pressure control and flow control, the opening control and travel speed control of the needle valve 10 connected to the plunger pump can be realized by the electric proportional valve 23.

[0044] In some embodiments, see Figure 2 The electric proportional valve 23 is a two-position two-way valve, which has two working positions and two oil ports. When the electric proportional valve 23 is in the first working position, the two oil ports are connected to each other so that the main oil supply pipeline is connected. And the first working position is the normal position. When the electric proportional valve 23 is in the second working position, the two oil ports are disconnected so that the main oil supply pipeline is disconnected.

[0045] In order to avoid the potential safety hazard of manual local control, the remote control unit 30 is connected to the hydraulic assembly 20 in this embodiment, that is, during the test, the remote control unit 30 is not arranged at the test site, but at the debugging center, so that the remote control unit 30 can realize the remote control of the electric proportional valve 23 in the hydraulic assembly 20. It can be understood that the communication connection between the remote control unit 30 and the hydraulic assembly 20 can be a wireless or wired connection, which is not limited in this embodiment.

[0046] In a possible embodiment, the hydraulic component also includes a reversing valve 24, the liquid oil inlet of the reversing valve 24 is connected to the electric proportional valve 23, the first working oil port of the reversing valve 24 is connected to the rodless chamber 111, the second working oil port of the reversing valve 24 is connected to the rod chamber 112, the return oil port of the reversing valve 24 is connected to the hydraulic oil tank 21, and the reversing valve 24 is connected to the remote control unit 30; the reversing valve 24 has a first state and a second state, when the reversing valve 24 is in the first state, the liquid oil inlet is connected to the first working oil port, and when it is in the second state, the liquid oil inlet is connected to the second working oil port; wherein the remote control unit 30 can control the reversing valve 24 to switch between the first state and the second state.

[0047] See also Figure 2 In this embodiment, the main oil supply pipeline is further provided with a reversing valve 24, which is arranged on the main oil supply pipeline and located between the electric proportional valve 23 and the needle valve 10. The reversing valve 24 is used to switch the piston travel direction of the needle valve cylinder 11 to realize the bidirectional operation of the needle valve 10. Specifically, the reversing valve 24 is a four-way valve, so it has a liquid oil inlet, an oil return port, a first working oil port and a second working oil port, wherein the first working oil port of the reversing valve 24 is connected to the rodless chamber 111, the second working oil port of the reversing valve 24 is connected to the rod chamber 112, the oil return port of the reversing valve 24 is connected to the hydraulic oil tank 21, and the liquid oil inlet is connected to the electric proportional valve 23.

[0048] In this embodiment, when the reversing valve 24 is in the first state, the liquid oil inlet is connected to the first working oil port, thereby supplying oil to the rodless chamber 111, and at this time, the rod chamber 112 returns oil. Therefore, in the first state, the main oil supply pipeline supplies oil to the rodless chamber 111, pushing the needle valve cylinder 11 to extend. In the second state, the liquid oil inlet is connected to the second working oil port, thereby supplying oil to the rod chamber 112, and at this time, the rodless chamber 111 returns oil. Therefore, in the second state, the main oil supply pipeline supplies oil to the rod chamber 112, pushing the needle valve cylinder 11 to retract.

[0049] Specifically, when verifying the plunger pump test, it may be necessary to increase pressure or reduce pressure, and the above two situations require the piston to move in different directions. Therefore, in this embodiment, the needle valve cylinder 11 can be extended or retracted through the reversing valve 24.

[0050] It can be understood that the reversing valve 24 can be a two-position four-way valve or a three-position four-way valve. In one embodiment, the reversing valve 24 is a Y-type mid-position three-position four-way reversing valve 24. That is, at this time, the reversing valve 24 also has a third state, in which the first working oil port and the second working oil port are both connected to the return oil port. The third state makes the needle valve 10 in a floating state when the reversing valve 24 is in the mid-position, that is, it is not controlled by the hydraulic system and can move freely with external force.

[0051] It is understandable that during the plunger pump test, it is sometimes necessary to brake the needle valve 10 when it stops moving or changes its direction of movement to avoid excessive movement or damage due to inertia. At this time, the middle position function of the Y-type middle position three-position four-way reversing valve 24 in this embodiment, that is, the third state, can achieve this function. When the valve core is in the middle position, the first working oil port and the second working oil port are both connected to the return oil port, and the oil in the needle valve 10 can be quickly discharged, thereby achieving braking. At the same time, when the brake needs to be released, it is only necessary to switch the valve core to other working positions, that is, switch the reversing valve 24 to the first state or the second state.

[0052] In one possible embodiment, see Figure 2 The hydraulic assembly 20 also includes a hydraulic lock 25 , which is arranged between the oil inlet and the electric proportional valve 23 .

[0053] In this embodiment, the hydraulic lock 25 ensures that the oil cylinder is locked, so that the needle valve 10 can maintain pressure during the plunger pump test. Of course, it can be understood that when the needle valve 10 maintains pressure, the electric proportional valve 23 and the reversing valve 24 are both de-energized, so that the reversing valve 24 is in the third state.

[0054] In one possible embodiment, see Figure 2 The hydraulic assembly also includes a double hydraulically controlled one-way valve 29, a first end of the double hydraulically controlled one-way valve 29 is respectively connected to the first working oil port and the second working oil port, and a second end of the double hydraulically controlled one-way valve 29 is respectively connected to the rod chamber 112 and the rodless chamber 111.

[0055] In this embodiment, in the hydraulic system, the double hydraulic control one-way valve 29 can not only quickly discharge the hydraulic oil in the hydraulic pipeline to avoid pipeline vibration and bursting, but also keep the entire fracturing equipment test system in a safe and stable state. In addition, in the hydraulic assembly, the double hydraulic control one-way valve 29 can also cooperate with the hydraulic lock 25 to lock the needle valve 10. By controlling the forward and reverse flow of the oil, the one-way or two-way locking of the double hydraulic control one-way valve 29 is achieved.

[0056] In a possible embodiment, the hydraulic assembly further includes a relief valve 26 , one end of the relief valve 26 is communicated with the oil outlet of the hydraulic pump 22 , and the other end of the relief valve 26 is communicated with the hydraulic oil tank 21 .

[0057] See also Figure 2 In this embodiment, the hydraulic assembly has an overflow branch in addition to the main oil supply pipeline, one end of which is connected to the oil outlet of the hydraulic pump 22, and the other end is connected to the hydraulic oil tank 21. An overflow valve 26 is provided on the overflow branch.

[0058] For example, in a specific example, after the needle valve 10 is started, the relief valve 26 is energized to limit the system working pressure to no more than 20 MPa to ensure system safety. After the entire hydraulic system is shut down, the relief valve 26 loses power and the system is depressurized. It can be understood that in this embodiment, the maximum working pressure of the system is limited by the relief valve 26 to ensure equipment safety.

[0059] In a possible embodiment, the hydraulic assembly further includes a filter 27 and a bypass valve 28 . The filter 27 is disposed between the electric proportional valve 23 and the hydraulic pump 22 , and the bypass valve 28 and the filter 27 are disposed in parallel.

[0060] See also Figure 2 In this embodiment, a filter 27 with a bypass valve 28 is provided on the main oil supply pipeline, which is provided between the electric proportional valve 23 and the hydraulic pump 22. In this way, under normal circumstances, the hydraulic oil is filtered through the filter 27 to remove impurities therein. When the filter element in the filter 27 is blocked due to excessive impurities, or needs to be replaced or maintained, the bypass valve 28 will be activated, allowing the hydraulic oil to bypass the filter 27 and flow directly to the electric proportional valve 23, thereby maintaining the uninterrupted operation of the hydraulic component. It can be seen that in this embodiment, the reliability and availability of the hydraulic component are improved by the filter 27 with the bypass valve 28.

[0061] In a possible embodiment, the remote control unit 30 includes a host computer 31, a hydraulic assembly controller 32 and a fracturing equipment controller 33. The hydraulic assembly controller 32 is respectively connected to the host computer 31 and the hydraulic assembly 20 in communication, and the fracturing equipment controller 33 is connected to the host computer 31 in communication.

[0062] Specifically, the host computer 31, the hydraulic component controller 32 and the fracturing equipment controller 33 are all connected to the same local area network. Of course, the specific networking method can be wired or wireless, and this embodiment does not limit this. For example, wired networking can be configured with a wired network port on the corresponding workstation, so that the host computer 31, the hydraulic component controller 32 and the fracturing equipment controller 33 are all connected through the wired network port. Wireless networking can be configured with wireless base stations in both the test site and the control site, so that the host computer 31, the hydraulic component controller 32 and the fracturing equipment controller 33 are all networked through the network provided by the wireless base station.

[0063] Among them, the host computer 31 is responsible for issuing instructions and providing an interactive interface. The host computer 31 can be an industrial computer in the control center. The host computer 31 is equipped with an automated test program, which can also integrate conventional commissioning items of the fracturing truck, including no-load test, overpressure protection test, load test, continuous operation test, etc. The host computer 31 runs the automated test program to identify the process parameters of the process flow file, and issues instructions to the corresponding lower computer according to the process to realize automatic commissioning.

[0064] The lower computer includes but is not limited to a hydraulic component controller 32 and a fracturing equipment controller 33 .

[0065] The fracturing equipment controller 33 is installed on the fracturing vehicle, and is used to collect the operating status of the fracturing vehicle, and feed the collected operating status of the fracturing vehicle back to the host computer 31. In addition, the fracturing equipment controller 33 can also be used to control the corresponding components in the fracturing vehicle to perform corresponding actions according to the control instructions issued by the host computer 31, such as controlling the start, shifting, and lifting speed of the fracturing vehicle.

[0066] The hydraulic component controller 32 can be a hydraulic component PLC (Programmable Logic Controller), which is connected to hydraulic components such as the electric proportional valve 23, the reversing valve 24, and the hydraulic lock 25 in the hydraulic component. It is at least used to control the power on and off of each hydraulic component in the hydraulic component 20, the state switching of the reversing valve 24, and the specific scheduling of the electric proportional valve 23, so as to perform operations such as pressurization, depressurization, or pressure maintenance during the plunger pump test.

[0067] It can be seen that in this embodiment, the fracturing equipment controller 33, the host computer 31 and the hydraulic component controller 32 form a local area network through a switch, etc. The host computer 31 remotely reads the operation information of the fracturing vehicle through the local area network, and can start the fracturing vehicle, shift up and down, and increase and decrease the speed. In addition, the host computer 31 sends instructions to the hydraulic component controller 32 to perform operations such as pressure increase, pressure reduction, and pressure maintenance as needed to achieve remote control of the needle valve 10: the oil cylinder of the needle valve 10 moves left and right under the control of the hydraulic component, and the diameter of the fracturing fluid passing through the needle valve 10 changes accordingly, and the pressure also changes accordingly.

[0068] In one embodiment, see Figure 2 The hydraulic assembly also includes a pressure gauge and a pressure sensor, which are installed at the outlet of the hydraulic pump 22; wherein the pressure sensor is communicatively connected with the hydraulic assembly controller 32.

[0069] Specifically, in this embodiment, the host computer 31 can obtain the outlet pressure P of the hydraulic pump 22 through the pressure sensor, and compare the outlet pressure P with the set pressure Ps during the plunger pump verification, so as to perform a pressure reduction operation or a pressure increase operation according to the comparison result. The on-site personnel can directly read the outlet pressure P from the pressure gauge to judge the experimental operation status on-site.

[0070] Alternatively, in another embodiment, a pressure gauge and a pressure sensor are also provided at the entrance of the rodless chamber 111. The pressure sensor collects the inlet pressure of the rodless chamber 111, and the upper computer 31 compares it with the aforementioned outlet pressure P to achieve the purpose of monitoring the operating status of the hydraulic component. The pressure gauge is directly read by the on-site personnel to determine the experimental operation status.

[0071] In one embodiment, the system further includes a fracturing fluid supply device 40, which is connected to the fracturing equipment; the remote control unit 30 further includes a supply device controller 34, which is respectively connected to the fracturing fluid supply device 40 and the host computer 31 for communication.

[0072] The fracturing fluid supply device 40 is used to provide fracturing fluid to the fracturing truck during the plunger pump verification process, and the fracturing truck outputs pressurized ultra-high pressure fracturing fluid, and the ultra-high pressure fracturing fluid returns to the fracturing fluid supply device after passing through the needle valve 10, thereby forming a fracturing fluid loop.

[0073] It is understandable that in the process of plunger pump verification, in order to adapt to different models of fracturing vehicles, the control of the supply of fracturing fluid may also be involved. Therefore, in this embodiment, the remote control unit 30 also includes a liquid supply device controller 34, and the liquid supply device controller 34 is respectively connected to the fracturing fluid supply device and the host computer 31 for communication. Therefore, the host computer 31 can also control and adjust the equipment operating parameters of the fracturing fluid supply device.

[0074] It is worth mentioning that, in a feasible implementation manner, the fluid supply device controller 34 is constructed as a fluid supply device PLC, and at this time the fluid supply device PLC and the hydraulic component PLC are integrated into a control cabinet.

[0075] For ease of understanding, an example is shown below:

[0076] See also Figure 3The fracturing equipment test system includes a debugging center and multiple debugging stations. The debugging center has a host computer 31, which is responsible for issuing instructions and providing an interactive interface. Specifically, the host computer 31 is configured with an automated test program, and the automated test program can also integrate conventional fracturing vehicle debugging projects, including no-load test, overpressure protection test, load test, continuous operation test, etc. The host computer 31 runs the automated test program to identify the process parameters of the process flow file, and issues instructions to the corresponding lower computers (fracturing fluid supply equipment, hydraulic component PLC and fluid supply equipment PLC) according to the process flow file to achieve automatic debugging. The debugging center is also equipped with a switch and a control cabinet. The host computer 31 can be networked with the control cabinet and the fracturing vehicle controller 33 through the switch. The control cabinet integrates the fluid supply equipment PLC and the hydraulic component PLC.

[0077] Each debugging station corresponds to a fracturing truck. The debugging station has a hydraulic station, in which a hydraulic assembly is arranged. The hydraulic assembly includes a hydraulic oil tank 21, which is connected to the oil inlet of a low-flow hydraulic pump 22. And the hydraulic pump 22 is equipped with an electric motor. The oil outlet of the hydraulic pump 22 is connected to the main oil supply pipeline and the overflow branch. An overflow valve 26 is arranged on the overflow branch, which limits the working pressure in the hydraulic assembly system to no more than 20Mpa to ensure the safety of the system. The other end of the overflow branch is connected to the hydraulic oil tank 21.

[0078] A filter 27 for a bypass valve 28 is disposed in the main oil supply pipeline, the filter 27 is connected to an electric proportional valve 23, the electric proportional valve 23 is connected to a hydraulic lock 25, and the hydraulic lock 25 is connected to the oil inlet of the Y-type center position three-position four-way reversing valve 24. The oil return port of the reversing valve 24 is connected to the hydraulic oil tank 21 through the oil return pipeline. The first working oil port of the reversing valve 24 is connected to the rodless chamber 111 of the needle valve 10, and the second working oil port is connected to the rod chamber 112 of the needle valve 10. A double hydraulically controlled one-way valve 29 is also disposed between the reversing valve 24 and the needle valve 10. In addition, a one-way throttle valve is also disposed between the rodless chamber 111 and the double hydraulically controlled one-way valve 29. A pressure gauge and a pressure sensor are disposed at the oil outlet of the hydraulic pump 22.

[0079] See also Figure 4 In the specific verification process, the host computer 31 first initializes the hydraulic station status and reads the operation information and process file of the fracturing vehicle. Then, according to the process file, start the machine, shift up, increase the speed and other operations. After the fracturing pump of the fracturing vehicle works normally, read the outlet pressure P of the hydraulic pump 22 and the set pressure Ps preset in the process file, and compare the two. When P>Ps, perform the pressure reduction (pressure relief) operation; when P is less than Ps, perform the pressure increase operation. When the absolute value of the difference between P and Ps is less than 2Mpa, a pressure maintenance instruction can be issued to maintain the pressure according to the preset pressure maintenance time in the file. After the time is met, shift gears and repeat the above steps.

[0080] Specifically, after the upper computer 31 controls the hydraulic oil pump to start, the relief valve 26 is energized to limit the hydraulic system working pressure to no more than 20 MPa to ensure safety. After the system is shut down, the relief valve 26 loses power and the system is depressurized.

[0081] When the pressure increase command is executed, the relief valve 26, the reversing valve 24 and the electric proportional valve 23 are controlled to be energized, and the reversing valve 24 is controlled to switch to the first state, and the oil cylinder moves to the right to reduce the fluid path of the needle valve. The flow rate of the hydraulic system is adjusted by adjusting the current of the electric proportional valve 23, so that the travel speed of the oil cylinder can be adjusted.

[0082] When the pressure relief (pressure reduction) instruction is executed, the relief valve 26, the reversing valve 24 and the electric proportional valve 23 are controlled to be energized, and the reversing valve 24 is controlled to switch to the second state, and the needle valve cylinder 11 moves to the left to reduce the needle valve fluid path. By adjusting the current of the electric proportional valve 23, the pressure relief reflux speed can be adjusted to achieve fine adjustment or pressure relief to 0.

[0083] When the pressure-maintaining instruction is executed, the relief valve 26, the reversing valve 24 and the electric proportional valve 23 are all de-energized, and the hydraulic lock 25 ensures that the oil cylinder is locked.

[0084] This example realizes unmanned workstations during fracturing truck commissioning, improving safety. Repetitive and high-intensity work is automatically performed by machines and equipment, reducing labor intensity. In addition, through automatic program control, energy waste caused by manual misoperation or invalid operation is reduced. Finally, multiple fracturing trucks are debugged at the same time, reducing the man-machine ratio and saving labor costs.

[0085] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A fracturing equipment test system, characterized in that: include: A needle valve, the needle valve is connected to the outlet of the plunger pump of the fracturing equipment, and the needle valve has a needle valve cylinder; A hydraulic assembly, the hydraulic assembly comprising a hydraulic oil tank, a hydraulic pump and an electric proportional valve, the oil inlet of the hydraulic pump is connected to the hydraulic oil tank, the oil outlet of the hydraulic pump is communicated with the electric proportional valve, and the electric proportional valve is communicated with the needle valve cylinder; as well as A remote control unit is communicatively connected with the hydraulic assembly, and the remote control unit adjusts the needle valve cylinder by controlling the electric proportional valve.

2. The fracturing equipment testing system according to claim 1, characterized in that: The needle valve cylinder is divided into a rod chamber and a rodless chamber by a piston; The hydraulic assembly further comprises a reversing valve, the inlet oil port of the reversing valve is communicated with the electric proportional valve, the first working oil port of the reversing valve is communicated with the rodless chamber, the second working oil port of the reversing valve is communicated with the rod chamber, the oil return port of the reversing valve is communicated with the hydraulic oil tank, and the reversing valve is in communication connection with the remote control unit; The reversing valve has a first state and a second state. When the reversing valve is in the first state, the liquid oil inlet is connected to the first working oil port; when the reversing valve is in the second state, the liquid oil inlet is connected to the second working oil port. The remote control unit is capable of controlling the reversing valve to switch between the first state and the second state.

3. The fracturing equipment testing system according to claim 2, characterized in that: The reversing valve is a Y-type, mid-position, three-position, four-way reversing valve. The reversing valve also has a third state. When the reversing valve is in the third state, both the first working oil port and the second working oil port are connected to the oil return port.

4. The fracturing equipment testing system according to claim 3, characterized in that: The hydraulic assembly further comprises a hydraulic lock, which is arranged between the oil inlet and the electric proportional valve.

5. The fracturing equipment testing system according to claim 2, characterized in that: The hydraulic assembly also includes a double hydraulically controlled one-way valve, the first end of which is connected to the first working oil port and the second working oil port respectively, and the second end of which is connected to the rod chamber and the rodless chamber respectively.

6. The fracturing equipment testing system according to claim 1, characterized in that: The hydraulic assembly further includes a filter and a bypass valve. The filter is arranged between the electric proportional valve and the hydraulic pump, and the bypass valve is arranged in parallel with the filter.

7. The fracturing equipment testing system according to claim 1, characterized in that: The hydraulic assembly further comprises an overflow valve, one end of which is communicated with the oil outlet of the hydraulic pump, and the other end of which is communicated with the hydraulic oil tank.

8. The fracturing equipment testing system according to any one of claims 1 to 7, characterized in that: The remote control unit comprises: Host computer; A hydraulic assembly controller, the hydraulic assembly controller being communicatively connected to the host computer and the hydraulic assembly respectively; and A fracturing equipment controller is communicatively connected with the host computer.

9. The fracturing equipment testing system according to claim 8, characterized in that: The hydraulic assembly further comprises a pressure gauge and a pressure sensor, wherein the pressure gauge and the pressure sensor are installed at the oil outlet of the hydraulic pump; Wherein, the pressure sensor is communicatively connected with the hydraulic component controller.

10. The fracturing equipment testing system according to claim 8, characterized in that: The system further comprises a fracturing fluid supply device, wherein the fracturing fluid supply device is in communication with the fracturing device; The remote control unit further comprises a liquid supply device controller, and the liquid supply device controller is communicatively connected with the fracturing fluid supply device and the host computer respectively.

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