A low pressure system protection device and method for a vibroseis vibrator pump

Abstract

The application provides a controllable source vibration pump low-pressure system protection device and method, wherein the controllable source vibration pump low-pressure system protection device comprises a driving low-pressure system, a vibrating low-pressure system and a hydraulic control unit, the hydraulic control unit is arranged between the low-pressure system and the vibrating low-pressure system, the hydraulic control unit comprises a solenoid valve, one end of the solenoid valve is communicated with the driving low-pressure system, the other end of the solenoid valve is communicated with the vibrating low-pressure system, the solenoid valve is provided with a control switch, and the control switch is used for controlling the conduction and disconnection of the solenoid valve according to the pressure change of the vibrating low-pressure system. By arranging the hydraulic control unit between the driving low-pressure system and the vibrating low-pressure system, the driving low-pressure system supplements the amount of hydraulic oil to the vibrating low-pressure system before the controllable source starts scanning, thereby effectively avoiding the problem that the vibration pump appears a vibrating low-pressure zero state and causes the cavitation phenomenon of the flow distribution disc of the vibration pump, and the vibration pump is protected.

Description

Technical Field

[0001] The present application relates to the field of oil exploration technology, and in particular to a device and method for protecting a low-pressure system of a controllable seismic source vibration pump. Background Art

[0002] Vibrators, which generate seismic waves by continuously striking the ground with a vibrator mounted on a special vehicle, are an important method for seismic exploration and are widely used in oil and gas exploration and development. By artificially stimulating seismic waves and collecting the reflected waves at predetermined locations during their propagation through the underlying layer, various parameters of the stimulated seismic waves and the collected reflected waves can be combined to infer the structure and properties of the strata and explore for the possibility of oil and natural gas.

[0003] When the vibrator is operating in low-frequency sweep signal mode, the vibration pump's response time from mechanical zero to maximum swing angle is very short. The accumulator provides approximately 75% of the hydraulic flow to the system. During the first 1-2 seconds of the sweep, the increased weight stroke requires the pump to replenish a large amount of hydraulic flow to support the nitrogen bag and weight movement. During this period, the pump experiences a low-pressure zero return, causing cavitation on the pump's valve plate. Since vibrators operate thousands of times a day, accumulated cavitation can permanently damage the pump. Summary of the Invention

[0004] The embodiment of the present invention provides a low-pressure system protection device and method for a controllable seismic source vibration pump, so as to reduce the problem in the prior art that the vibration pump returns to a low-pressure zero state during initial scanning, causing cavitation on the distribution plate of the vibration pump.

[0005] In a first aspect, an embodiment of the present invention provides a vibrating pump low-pressure system protection device, a driving low-pressure system, a vibrating low-pressure system, and a hydraulic control unit;

[0006] The hydraulic control unit is arranged between the low-pressure system and the vibrating low-pressure system;

[0007] The hydraulic control unit includes a solenoid valve, one end of which is connected to the driving low-pressure system, and the other end of which is connected to the vibration low-pressure system;

[0008] The solenoid valve is provided with a control switch, and the control switch is used to control the conduction and disconnection of the solenoid valve according to the pressure change of the vibrating low-pressure system.

[0009] Preferably, the hydraulic control unit further comprises a one-way valve;

[0010] One end of the one-way valve is connected to the solenoid valve, and the other end is connected to the vibration low-pressure system;

[0011] The one-way valve is conducted by the driving low-pressure system to the vibration low-pressure system.

[0012] Preferably, the electromagnetic valve is a normally closed electromagnetic valve.

[0013] Preferably, the electromagnetic valve is a direct-acting electromagnetic valve.

[0014] Preferably, the electromagnetic valve is a step direct-acting electromagnetic valve.

[0015] Preferably, the electromagnetic valve is a pilot-operated electromagnetic valve.

[0016] Preferably, the pressure of the driving low-pressure system is greater than the pressure of the vibration low-pressure system.

[0017] Preferably, the control switch is a pressure switch; a pressure installation port of the pressure switch is communicated with the vibration low-pressure system; and a circuit of the pressure switch is connected in series with a circuit of the electromagnetic valve.

[0018] In a second aspect, an embodiment of the present application provides a controllable source vibration pump low-pressure system protection method, applied to the controllable source vibration pump low-pressure system protection device as any one of the above, comprising:

[0019] Receiving an operation instruction of a user to control the source panel of the controllable source to fall;

[0020] Before receiving a start vibration instruction, the control switch is turned on to conduct the electromagnetic valve.

[0021] After receiving a vibration stop instruction, the control switch is turned off to disconnect the electromagnetic valve.

[0022] Preferably, the control switch is turned on to conduct the electromagnetic valve, comprising:

[0023] According to the pressure of the driving low-pressure system, a first preset pressure value is determined.

[0024] When the pressure of the vibration low-pressure system reaches the first preset pressure value, the control switch is turned on.

[0025] Preferably, after receiving a vibration stop instruction, the control switch is turned off to disconnect the electromagnetic valve, comprising:

[0026] After receiving a vibration stop instruction, when the pressure of the vibration low-pressure system drops below the first preset pressure value, the control switch is turned off to disconnect the electromagnetic valve.

[0027] Compared with the prior art, the present application has the following advantages:

[0028] In the embodiment of the present application, the hydraulic control unit is arranged between the driving low-pressure system and the vibrating low-pressure system, and before the controllable source starts scanning, the driving low-pressure system supplements the amount of hydraulic oil to the vibrating low-pressure system, so that when the controllable source starts scanning, the pressure of the vibrating low-pressure system is kept constant and there is sufficient amount of hydraulic oil, thereby effectively avoiding the problem of cavitation of the flow distribution disc of the vibrating pump caused by the vibrating low-pressure zero state of the vibrating pump, and not affecting the normal operation of the controllable source, bringing great economic benefits and wide social benefits.

[0029] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiment description.

[0031] Figure 1 The schematic diagram of the controllable source vibrating pump low-pressure system protection device provided by the embodiment of the present application is shown in the figure.

[0032] Figure 2 The schematic diagram of the hydraulic oil circulation system of the controllable source vibrating pump low-pressure system protection device provided by the embodiment of the present application is shown in the figure.

[0033] Figure 3 The schematic diagram of the electromagnetic valve circuit connection provided by the embodiment of the present application is shown in the figure.

[0034] Figure 4 The step flow chart of the controllable source vibrating pump low-pressure system protection method provided by the embodiment of the present application is shown in the figure.

[0035] Figure 5 The schematic diagram of the hydraulic system of the controllable source vibrating pump low-pressure system protection device provided by the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0037] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] Before explaining the controllable source vibration pump low pressure system protection device and method provided by the embodiments of the present application, the application scenario of the vibration pump low pressure system protection device and method provided by the embodiments of the present application is described in detail:

[0039] The controllable source using low frequency scanning signal is more and more valued by major geophysical prospecting companies. However, the low frequency scanning signal operation mode causes great damage to the TITAN480 controllable source vibration pump of the Oman project.

[0040] In addition to system pollution and high oil temperature, low hydraulic system pressure is also an important factor affecting pump life. When the hydraulic system pressure is low, a local vacuum is formed when the plunger pump absorbs oil, causing bubbles to appear in the low pressure area of the pump such as the valve port disc and the end face. Finally, the bubbles burst, damaging the components in the pump.

[0041] Under the low frequency scanning signal operation mode of the controllable source, the response time of the vibration pump from mechanical zero to maximum swing angle is 0.9 seconds. The controllable source cannot provide hydraulic flow to the hydraulic system when it starts scanning, and the accumulator provides about 75% of the hydraulic flow to the hydraulic system. When the controllable source starts scanning, in the next 1-2 seconds, due to the increase of the weight travel, the vibration pump needs to supplement a large amount of flow for the nitrogen bag and the weight movement. At this time, due to the fact that the hydraulic oil mainly flows to the high pressure system of the vibration pump, the vibration pump low pressure system appears vibration low pressure zero state, causing the vibration pump flow distribution disc to produce cavitation phenomenon. The vibrator needs to scan more than 2500 times a day, and the above cavitation phenomenon of the vibration pump flow distribution disc will repeatedly occur, which will gradually damage the vibration pump.

[0042] Based on the above problems, the present invention provides a device for protecting the low-pressure system of a controllable vibrating source vibration pump, which may include a driving low-pressure system, a vibration low-pressure system and a hydraulic control unit. The hydraulic control unit is arranged between the low-pressure system and the vibration low-pressure system. The hydraulic control unit includes a solenoid valve, one end of which is connected to the driving low-pressure system and the other end is connected to the vibration low-pressure system. The solenoid valve is provided with a control switch, and the control switch can control the conduction and disconnection of the solenoid valve according to the pressure change of the vibration low-pressure system. In an embodiment of the present invention, a hydraulic control unit is installed between the driving low-pressure system and the vibration low-pressure system of the controllable vibrating source. By controlling the driving low-pressure system to replenish the amount of hydraulic oil for the vibration low-pressure system, the pressure of the vibration low-pressure system is kept constant when the controllable vibrating source performs a low-frequency scanning operation. The device can effectively protect the vibration pump of the controllable vibrating source without affecting its normal operation, bringing great economic benefits and extensive social benefits.

[0043] Figure 1 Schematic diagram of a low-pressure system protection device for a vibrating pump with a controllable source provided by an embodiment of the present invention. Figure 1 As shown, the vibrating source vibration pump low-pressure system protection device may include a driving low-pressure system 1, a vibration low-pressure system 2, and a hydraulic control unit 3. The hydraulic control unit 3 is arranged between the driving low-pressure system 1 and the vibration low-pressure system 2. The hydraulic unit 3 is connected to the driving low-pressure system 1 and the vibration low-pressure system 2 respectively through hydraulic oil pipes. The hydraulic control unit 3 includes a solenoid valve 31. One end of the solenoid valve 31 is connected to the driving low-pressure system 1 through a hydraulic oil pipe, and the other end is connected to the vibration low-pressure system 2 through a hydraulic oil pipe. The solenoid valve 31 is provided with a control switch 4. The control switch 4 can control the conduction and disconnection of the solenoid valve 31 according to the pressure changes in the vibration low-pressure system 2. The power line of the control switch 4 and the solenoid valve 31 is connected in series to the control console 5 of the vibrating source. The control switch 4 can be provided with a pressure sensing device. The pressure sensing device is connected to the vibration low-pressure system 2 through the oil pipe and can connect or disconnect the control switch 4 according to the pressure changes in the vibration low-pressure system 2.

[0044] Figure 2 A schematic diagram of the hydraulic oil circulation of the low-pressure system protection device of the controllable source vibration pump provided by the embodiment of the present invention is shown as follows: Figure 2 As shown, the driving low-pressure system 1 is connected to the driving low-pressure manifold 6 via hydraulic piping; the vibration low-pressure system 2 is connected to the vibration low-pressure manifold 7 via hydraulic piping. The driving low-pressure manifold 6 and the vibration low-pressure manifold 7 are ultimately connected to the vibrator's overall hydraulic system 8 via hydraulic piping, thereby forming a hydraulic oil circulation loop. In this embodiment, the driving low-pressure manifold 6, the vibration low-pressure manifold 7, and the vibrator's overall hydraulic system 8 can refer to the vibrator hydraulic system of the prior art, and this embodiment of the present invention will not be described in detail.

[0045] It should be noted that the aforementioned "connectivity" refers to the connection between two adjacent components via a hydraulic oil pipe, allowing hydraulic oil to flow freely between the components. When the solenoid valve 31 is in the on state, hydraulic oil can flow between the inlet and outlet of the solenoid valve 31. When the solenoid valve 31 is in the off state, the valve core of the solenoid valve 31 is closed, blocking the flow of hydraulic oil between the inlet and outlet of the solenoid valve 31.

[0046] In a controllable vibrator, the hydraulic system includes a drive hydraulic system and a vibration hydraulic system. The drive hydraulic system and the vibration hydraulic system are designed to operate relatively independently. The drive hydraulic system includes a drive high-pressure system and a drive low-pressure system. The drive high-pressure system is connected to the high-pressure oil outlet of the drive pump, and the drive low-pressure system is connected to the low-pressure oil inlet of the drive pump. The vibration hydraulic system includes a vibration high-pressure system and a vibration low-pressure system. The vibration high-pressure system is connected to the high-pressure oil outlet of the vibration pump, and the vibration low-pressure system is connected to the low-pressure oil inlet of the vibration pump. Usually, when designing a controllable vibrator hydraulic system, the pressure of the drive low-pressure system is higher than that of the vibration low-pressure system.

[0047] Before the controllable vibrator performs scanning, the hydraulic control unit 3 controls the driving low-pressure system 1 and the vibration low-pressure system 2 to be connected. Since the pressure of the driving low-pressure system 1 is different from the pressure of the vibration low-pressure system 2, after the driving low-pressure system 1 and the vibration low-pressure system 2 are connected, the hydraulic oil flows between the two, and the hydraulic oil is replenished for the low-pressure vibration low-pressure system 2 through the high-pressure driving low-pressure system 1, ensuring that the pressure of the vibration low-pressure system 2 is constant when the controllable vibrator performs scanning, thereby protecting the vibration pump connected to the vibration low-pressure system 2 of the controllable vibrator.

[0048] It should be noted that the structure of the hydraulic system of the controllable vibrator can refer to the existing technology, and the embodiment of the present invention will not be described in detail.

[0049] Preferably, the liquid inlet of the solenoid valve 31 is connected to the low-pressure filter interface of the driving pump through a hydraulic oil pipe. The liquid outlet of the solenoid valve 31 is connected to the low-pressure manifold of the vibration low-pressure system 2 through a hydraulic oil pipe.

[0050] In actual use, the drive pump of the controllable source drives the drive device of the controllable source to work when the controllable source moves. When the controllable source reaches the monitoring point, the vibration pump operates to control the vibrator to work. Generally, the drive low-pressure system 1 and the vibration low-pressure system 2 belong to two hydraulic systems and work independently. When the vibration pump works, a certain pressure is maintained in the drive low-pressure system 1. By connecting the drive low-pressure system 1 and the vibration low-pressure system 2, the drive low-pressure system 1 can provide hydraulic flow to the vibration low-pressure system 2. For example, the pressure of the drive low-pressure system is 350 psi, the pressure of the vibration low-pressure system is 220 psi, the displacement of the oil supply pump of the drive pump is 20 ml / rev, and 107 L / min can be provided by two drive pumps at 2679 RPM, which can be provided to the vibration low-pressure system and is helpful to the vibration low-pressure system.

[0051] Specifically, since the pressure of the drive low-pressure system 1 is greater than the pressure of the vibration low-pressure system 2, the drive low-pressure system 1 and the vibration low-pressure system 2 are connected through the hydraulic control unit 3. After the controllable source reaches the monitoring point, the vibration operating system is started, the vibration pump works, and the source plate is pressed down. At this time, the drive low-pressure system 1 and the vibration low-pressure system 2 can be connected, and the drive low-pressure system 1 can supplement the hydraulic oil amount of the vibration low-pressure system 2. When the controllable source starts the scanning operation, it is ensured that the vibration low-pressure system has sufficient hydraulic oil, thereby avoiding the vibration low-pressure zero state.

[0052] In the embodiment of the present application, the hydraulic control unit 3 can further include a one-way valve 32, one end of the one-way valve 32 is communicated with the electromagnetic valve 31, the other end is communicated with the vibration low-pressure system 2, and the one-way valve 32 is conducted by the drive low-pressure system 1 to the vibration low-pressure system 2. When the low-pressure system protection device works, based on the one-way flow characteristics of the one-way valve 32, only the hydraulic oil is allowed to flow from one end of the drive low-pressure system 1 to one end of the vibration low-pressure system 2, thereby effectively controlling the flow direction of the hydraulic oil and preventing the hydraulic oil from flowing back when the pressure of the vibration low-pressure system 2 is greater than the pressure of the drive low-pressure system 1 during the scanning operation of the controllable source.

[0053] Preferably, the one-way valve 32 is a straight-through one-way valve, the one-way valve 32 is communicated with the electromagnetic valve and the vibration low-pressure system through the hydraulic oil pipe, and the connection mode of the one-way valve 32 and the hydraulic oil pipe can be threaded connection. Those skilled in the art can select a suitable connection mode according to actual needs, and the present application does not limit this.

[0054] In this embodiment of the present invention, solenoid valve 31 can be a normally closed solenoid valve. When the low-pressure system protection device is operating, power is applied, and solenoid valve 31 is open. When the low-pressure system protection device is not operating, power is removed from solenoid valve 31, and solenoid valve 31 remains open, separating the driving low-pressure system 1 from the vibration low-pressure system 2 without affecting their respective operations. Furthermore, the normally closed solenoid valve is always in the de-energized state when not operating, effectively extending the solenoid valve's service life.

[0055] Specifically, the solenoid valve 31 may be a direct-acting solenoid valve. In practical applications, those skilled in the art may set the parameters of the solenoid valve 31 according to actual needs, and this embodiment of the present invention will not be described in detail.

[0056] Specifically, the solenoid valve 31 may be a step-by-step direct-acting solenoid valve. In practical applications, those skilled in the art may set the parameters of the solenoid valve 31 according to actual needs, and this embodiment of the present invention will not be described in detail.

[0057] Specifically, the solenoid valve 31 may be a pilot-operated solenoid valve. In practical applications, those skilled in the art may set the parameters of the solenoid valve 31 according to actual needs, which will not be described in detail in the embodiment of the present invention.

[0058] It should be noted that the connection method between the solenoid valve 31 and the hydraulic oil pipe can be any sealed connection form such as flange connection, threaded connection, clamp connection or other connection methods. Those skilled in the art can choose according to actual needs, and the embodiment of the present invention does not limit this.

[0059] Figure 3 FIG. 1 is a schematic diagram of a solenoid valve circuit connection according to an embodiment of the present invention. Figure 3 As shown, the power line of the solenoid valve 31 is connected in series with the power line of the control switch 4 and then connected to the control power supply. In this embodiment, the vibrator is equipped with an operating console 5, which integrates the control power supply. The solenoid valve circuit can be connected to the control power supply within the operating console 5. The control switch 4 can be equipped with a pressure sensing device, which is connected to the vibrating low-pressure system 2 via an oil pipe and can turn the control switch 4 on or off according to pressure changes in the vibrating low-pressure system 2.

[0060] In this embodiment of the present invention, control switch 4 may be a pressure switch, the pressure mounting port of which is connected to the vibrating low-pressure system 2, and the circuit of the pressure switch is connected in series with the circuit of the solenoid valve 31. In actual use, the pressure mounting port of the pressure switch is connected to the vibrating low-pressure system 2. By presetting the rated pressure of the pressure switch, the connection and disconnection of the pressure switch can be dynamically controlled according to the pressure of the driving low-pressure system.

[0061] When the controllable source reaches the monitoring point, the vibration operation system is started, the vibration pump works, the source plate is pressed down, and the pressure of the driving low-pressure system 1 gradually rises as the pump works. When the pressure of the vibration low-pressure system exceeds the rated pressure of the pressure switch, the pressure switch is turned on, and the electromagnetic valve 31 is in the on state. At this time, because the pressure of the driving low-pressure system 1 is higher than the pressure of the vibration low-pressure system 2, the hydraulic oil of the driving low-pressure system 1 flows to the vibration low-pressure system 2 under the action of the pressure difference, so that the oil amount of the vibration low-pressure system 2 is sufficient.

[0062] After the controllable source scanning work is completed, the vibration is stopped, and the pressure of the vibration system decreases. When the pressure of the vibration low-pressure system is lower than the rated pressure of the pressure switch, the pressure switch is turned off, and the electromagnetic valve 31 is in the off state. At this time, the driving low-pressure system 1 is separated from the vibration low-pressure system 2, thereby meeting the needs of separate work.

[0063] It should be noted that the specification of the pressure switch can be selected by a person skilled in the art according to the actual situation, and the embodiment of the present application will not be repeated here.

[0064] The present application also provides a controllable source vibration pump low-pressure system protection method applied to the controllable source vibration pump low-pressure system protection device of any one of the above. As shown in the figure, the controllable source vibration pump low-pressure system protection method can include the following steps: Figure 4

[0065] Step 101, receiving the operation instruction of the user, controlling the source plate of the controllable source to fall.

[0066] In the embodiment of the present application, when the controllable source moves to the monitoring point, the user issues an operation instruction, and the controllable source vibration pump receives the operation instruction of the user to drive the source plate to fall. In actual use, the controllable source can be provided with a control box, and the user can realize the start instruction operation through the operation button arranged in the control box. An automatic control system can also be arranged to control the source plate of the controllable source to fall by inputting the operation instruction.

[0067] Step 102, before receiving the start vibration instruction, the control switch 4 is turned on, and the electromagnetic valve 31 is turned on.

[0068] In the embodiment of the present application, during the falling process of the source plate, before receiving the start vibration instruction, the control switch 4 of the electromagnetic valve 31 is turned on, the electromagnetic valve 31 is turned on, the driving low-pressure system 1 and the vibration low-pressure system 2 are in a communication state, and because the pressure of the driving low-pressure system 1 is higher than the pressure of the vibration low-pressure system 2, the driving low-pressure system 1 starts to provide hydraulic oil to the vibration low-pressure system 2.

[0069] ​In the embodiment, the driving low-pressure system 1 is connected with the vibration low-pressure system 2 before the controlled source receives the start vibration instruction, and the controlled source starts scanning work after receiving the start vibration instruction, although the driving pump needs to supplement a large amount of hydraulic flow for the nitrogen bag and the weight movement at this time, but the driving low-pressure system 1 continuously provides hydraulic oil to the vibration low-pressure system 2, so that the hydraulic oil flow of the vibration low-pressure system 2 is sufficient during the scanning work of the controlled source.

[0070] In step 103, the control switch 4 is cut off and the electromagnetic valve 31 is disconnected after receiving the vibration stop instruction.

[0071] In the embodiment, the controlled source stops scanning work after receiving the vibration stop instruction, the control switch 4 is cut off, the electromagnetic valve 31 is disconnected, and the driving low-pressure system 1 is separated from the vibration low-pressure system 2, so that the respective work of the driving low-pressure system 1 and the vibration low-pressure system 2 is not affected.

[0072] In the embodiment, the driving low-pressure system 1 is connected with the vibration low-pressure system 2 before the controlled source starts scanning work, the driving low-pressure system 1 continuously provides hydraulic oil to the vibration low-pressure system 2 during the scanning work of the controlled source, so that the hydraulic oil flow of the vibration low-pressure system 2 is sufficient and the vibration pump is protected, and the driving low-pressure system is separated from the vibration low-pressure system after the controlled source stops scanning work, so that the two systems operate respectively and the respective work is not affected.

[0073] In the embodiment, the first preset pressure value can be determined according to the pressure of the driving low-pressure system 1.

[0074] In the embodiment, the first preset pressure value can be set according to the pressure of the driving low-pressure system, and the first preset pressure value is less than the pressure of the driving low-pressure system. In actual application, the pressure of the vibration low-pressure system is basically unchanged during the descent of the controlled source flat plate, the pressure of the vibration low-pressure system gradually increases during the pressurization process after the flat plate of the controlled source falls to the ground, and the scanning work can be started when the pressure increases to the vibration working pressure. In this process, a pressure value is set as the first preset pressure value, the preset pressure value is less than the pressure of the driving low-pressure system, the control switch 4 is turned on when the pressure of the vibration low-pressure system reaches the first preset pressure value, the electromagnetic valve 31 is turned on at this time, and the driving low-pressure system 1 is connected with the vibration low-pressure system 2.

[0075] Preferably, the control switch is a pressure switch, the first preset pressure value is used as the rated pressure value of the pressure switch, the pressure switch is automatically turned on when the pressure of the driving system reaches the first preset pressure value, so that the electromagnetic valve is turned on and the driving low-pressure system is connected with the vibration low-pressure system.

[0076] It should be noted that the first preset pressure value can be set according to the actual driving low-pressure system pressure of the controllable seismic source by the person skilled in the art, and the embodiment of the present application does not limit this.

[0077] Further, when the controllable seismic source scanning is completed, the vibration is stopped, the vibration low-pressure system pressure is reduced, and when the pressure is reduced to below the first preset pressure value, the control switch is cut off, the electromagnetic valve is disconnected, and the driving low-pressure system and the vibration low-pressure system are separated.

[0078] Preferably, the control switch is a pressure switch, when the controllable seismic source scanning is completed, the vibration is stopped, the vibration low-pressure system pressure is reduced, and when the pressure is reduced to less than the first preset pressure value, the pressure switch is automatically turned on, thereby separating the driving low-pressure system and the vibration low-pressure system.

[0079] In the embodiment of the present application, by setting the preset pressure value according to the pressure of the driving low-pressure system 1, the timing of connecting and separating the driving low-pressure system 1 and the vibration low-pressure system 2 is accurately controlled according to the pressure difference between the driving low-pressure system 1 and the vibration low-pressure system 2, and accurate control of the low-pressure system protection device is realized.

[0080] Figure 5 is a schematic diagram of the hydraulic system of the controllable seismic source vibration pump low-pressure system protection device provided by the embodiment of the present application. As shown in Figure 5 The driving low-pressure system 1 is connected with the vibration pump 11, and the driving low-pressure system 1 further includes a vibration oil supplementing system 12, a driving low-pressure manifold 13, etc.; the vibration low-pressure system 2 is connected with the vibration pump 21, and further includes a vibration oil supplementing system 22, a vibration low-pressure manifold 23, etc. The driving low-pressure manifold 13 of the driving low-pressure system 1 and the vibration low-pressure manifold 23 of the vibration low-pressure system 2 can be connected by a hydraulic control unit 3. In the embodiment, the pressure of the driving low-pressure system 1 is 350 psi, and the pressure of the vibration low-pressure system 2 is 220 psi during work. The driving low-pressure system 1 and the vibration low-pressure system 2 are connected by the hydraulic control unit 3, and since the pressure of the driving low-pressure system 1 is higher than that of the vibration low-pressure system 2, the driving low-pressure system 1 can be used to supplement the hydraulic oil of the vibration low-pressure system 2, so that sufficient hydraulic oil is ensured for the vibration low-pressure system when the controllable seismic source starts scanning, thereby avoiding the vibration low-pressure system returning to zero.

[0081] It should be noted that Figure 5 only the connection structure of the driving low-pressure system in the driving system and the connection structure of the vibration low-pressure system in the vibration system are shown in the embodiment, and other pipeline connection conditions of the driving system and the vibration system can refer to the settings in the prior art, and the embodiment will not be described here.

[0082] It is to be noted that, as used in this document, the terminology "first", "second", etc. is merely used to differentiate one entity or action from another, and does not necessarily imply or require any actual relationship or order between or among the entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0083] Each of the embodiments in the present specification is described in a related manner, and the same or similar parts among the embodiments can be referred to each other. Each of the embodiments focuses on the difference from other embodiments. For the embodiment of the method, since it is basically similar to the embodiment of the device, the description is relatively simple, and the relevant parts can be referred to the part of the description of the embodiment of the device.

[0084] The above only describes the preferred embodiments of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A low-pressure system protection device for a vibrating pump with a controllable source, characterized in that: include: Drive low-pressure system, vibration low-pressure system and hydraulic control unit; The hydraulic control unit is arranged between the low-pressure system and the vibrating low-pressure system; The hydraulic control unit includes a solenoid valve, one end of which is connected to the driving low-pressure system, and the other end of which is connected to the vibration low-pressure system; The solenoid valve is provided with a control switch, and the control switch is used to control the conduction and disconnection of the solenoid valve according to the pressure change of the vibrating low-pressure system; The hydraulic control unit further includes a one-way valve; one end of the one-way valve is connected to the solenoid valve, and the other end is connected to the vibration low-pressure system; the one-way valve is connected from the driving low-pressure system to the vibration low-pressure system; The control switch is a pressure switch; the pressure installation port of the pressure switch is connected to the vibration low-pressure system; the circuit of the pressure switch is connected in series with the circuit of the solenoid valve.

2. The vibratory pump low-pressure system protection device according to claim 1, characterized in that: The solenoid valve is a normally closed solenoid valve.

3. The vibratory pump low-pressure system protection device according to claim 2, characterized in that: The solenoid valve is a direct-acting solenoid valve.

4. The vibrating pump low-pressure system protection device according to claim 2, characterized in that: The solenoid valve is a step-by-step direct-acting solenoid valve.

5. The low-pressure system protection device for a controllable vibrating source vibration pump according to claim 2, characterized in that: The solenoid valve is a pilot-operated solenoid valve.

6. A method for protecting a low-pressure system of a vibrating pump with a controllable source, applied to the low-pressure system protection device of a vibrating pump with a controllable source according to any one of claims 1 to 5, characterized in that: include: Receive user's operation instructions and control the drop of the vibrator's source plate; Before receiving the vibration start instruction, turning on the control switch and turning on the solenoid valve; After receiving the vibration stop instruction, the control switch is turned off and the solenoid valve is disconnected.

7. The method for protecting a low-pressure system of a vibrating pump with a controllable source according to claim 6, characterized in that: The step of turning on the control switch and conducting the solenoid valve includes: Determining a first preset pressure value according to the pressure of the driving low-pressure system; When the pressure of the vibrating low-pressure system reaches the first preset pressure value, the control switch is turned on.

8. The method for protecting a low-pressure system of a vibrating pump with a controllable source according to claim 7, characterized in that: After receiving the vibration stop instruction, turning off the control switch and disconnecting the solenoid valve includes: After receiving the vibration stop instruction, when the pressure of the vibration low-pressure system drops below the first preset pressure value, the control switch is cut off and the solenoid valve is disconnected.

Images