A low-frequency high-pressure flow supplementing device and method for a vibroseis vibration pump

Abstract

The application provides a controllable source vibration pump low-frequency high-pressure flow supplementing device and method, which comprises a vibration pump, a vibration high-pressure manifold, a vibration oil supplementing manifold, a hydraulic oil pipe and a solenoid valve liquid, the oil outlet of the vibration pump is connected with the vibration high-pressure manifold through the hydraulic oil pipe, the oil inlet of the vibration pump is connected with the vibration oil supplementing manifold through the hydraulic oil pipe, one end of the solenoid valve is connected with the vibration high-pressure manifold through the hydraulic oil pipe, the other end of the solenoid valve is connected with the vibration oil supplementing manifold through the hydraulic oil pipe, and the solenoid valve is provided with a control switch which is used for controlling the conduction and disconnection of the solenoid valve. In the embodiment of the application, the vibration high-pressure manifold of the controllable source is connected with the vibration oil supplementing manifold through the solenoid valve, the solenoid valve is controlled to be conducted before the controllable source starts scanning, the high-pressure flow of the vibration pump is first sent to the vibration oil supplementing system, the vibration pump reaches the maximum flow first, and therefore the vibration pump can provide sufficient hydraulic oil in the low-frequency scanning of the controllable source.

Description

Technical Field

[0001] This application relates to the field of petroleum exploration technology, and in particular to a controllable source vibration pump low-frequency high-pressure flow replenishment device and method. Background Technology

[0002] The controlled vibration source's hydraulic system is designed as a closed-loop system, comprising a high-pressure vibration system and a low-pressure vibration system. The hydraulic system primarily uses a hydraulic pump (called a vibration pump) as its power source. The pump's outlet is connected to the high-pressure system, and its inlet is connected to the low-pressure system. During low-frequency scanning, the stroke of the hammer piston within the hydraulic cylinder is greater than during high-frequency scanning, requiring more hydraulic oil to be replenished as the hammer piston moves up and down.

[0003] Currently, the hydraulic pumps used in conventional controlled seismic sources exhibit a time delay of 900ms-1800ms from response time to maximum flow output. In the low-frequency range at the start of a controlled seismic source scan, due to this response delay, the pump cannot instantly reach its maximum flow rate, and therefore cannot provide sufficient hydraulic oil to the high-pressure vibration system. By the time the pump reaches its maximum flow rate, the seismic source scan has already reached the mid-frequency range. Therefore, insufficient oil supply from the pump occurs in the low-frequency range of controlled seismic source scanning, causing pressure fluctuations that affect the scan results. Summary of the Invention

[0004] This invention provides a device and method for supplementing high-pressure flow in the low-frequency band of a controllable source vibration pump, in order to reduce the problem of insufficient oil supply to the vibration pump in the low-frequency band of controllable source scanning in the prior art.

[0005] In a first aspect, embodiments of the present invention provide a controllable source vibration pump low-frequency high-pressure flow replenishment device, comprising: a vibration pump, a vibration high-pressure manifold, a vibration replenishment manifold, a hydraulic oil pipe, and a solenoid valve fluid;

[0006] The outlet of the vibration pump is connected to the high-pressure vibration manifold via the hydraulic oil pipe; the inlet of the vibration pump is connected to the vibration replenishment manifold via the hydraulic oil pipe.

[0007] One end of the solenoid valve is connected to the high-pressure vibration manifold via the hydraulic oil pipe, and the other end is connected to the vibration replenishment oil manifold via the hydraulic oil pipe.

[0008] The solenoid valve is equipped with a control switch, which is used to control the opening and closing of the solenoid valve.

[0009] Optionally, the vibration pump is a plunger pump.

[0010] Optionally, the plunger pump is a variable displacement plunger pump.

[0011] Optionally, the device further includes a high-pressure relief valve;

[0012] The outlet of the high-pressure relief valve is connected to the vibration replenishment manifold via the hydraulic oil pipe; the inlet of the high-pressure relief valve is connected to the solenoid valve via the hydraulic oil pipe.

[0013] The set pressure of the high-pressure relief valve is less than the working pressure of the vibration pump.

[0014] Optionally, the high-pressure relief valve is a pilot-operated relief valve.

[0015] Optionally, the solenoid valve is a normally closed solenoid valve.

[0016] Optionally, the control switch further includes a relay, which is electrically connected to the solenoid valve.

[0017] Secondly, embodiments of the present invention provide a method for replenishing low-frequency high-pressure flow in a controllable source vibration pump, applied to the controllable source vibration pump low-frequency high-pressure flow replenishment device as described in any of the preceding claims, comprising:

[0018] Upon receiving a customer's operation command, the controllable source plate descends.

[0019] After the seismic source plate lands, the control switch is turned on, and the solenoid valve is activated.

[0020] After the first preset time is reached, the control switch is turned off, and the solenoid valve is disconnected.

[0021] Optionally, before the controllable seismic source's source plate falls after receiving a customer's operation command, the following steps are also included:

[0022] The first preset time is determined based on the parameters of the vibration pump.

[0023] Optionally, determining the first preset time based on the parameters of the vibration pump includes:

[0024] Determine the second preset time required for the flow rate of the vibration pump to increase from mechanical zero to the maximum operating flow rate;

[0025] Set the first preset time, which is greater than or equal to the second preset time.

[0026] Compared with prior art, the present invention has the following advantages:

[0027] In this embodiment of the invention, the high-pressure manifold of the controllable vibration source is connected to the vibration oil supply manifold via a solenoid valve. Before the controllable vibration source begins scanning, the high-pressure manifold and the vibration oil supply manifold are controlled to be connected, so that the high-pressure flow of the vibration pump flows to the vibration oil supply system first, thereby allowing the vibration pump to reach its maximum flow rate first. When scanning begins, the vibration pump is already operating at its maximum flow rate, thus effectively ensuring that the vibration pump provides sufficient hydraulic oil in the low-frequency band of the controllable vibration source scanning. This effectively solves the problem of various quality control indicators failing to meet standards due to pressure fluctuations in the low-frequency band of the controllable vibration source, bringing significant economic and broad social benefits.

[0028] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are listed below. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0030] Figure 1 A schematic diagram of a low-frequency high-pressure flow replenishment device for a controllable source vibration pump provided in an embodiment of the present invention;

[0031] Figure 2 A schematic diagram of a controllable vibration source hydraulic system provided in an embodiment of the present invention;

[0032] Figure 3 A schematic diagram of a solenoid valve control circuit provided in an embodiment of the present invention;

[0033] Figure 4 A schematic diagram of another solenoid valve control circuit provided in an embodiment of the present invention;

[0034] Figure 5 A flowchart illustrating the steps of the controllable vibration source vibratory pump low-frequency high-pressure flow replenishment method provided in this embodiment of the invention;

[0035] Figure 6 A flowchart illustrating the steps of another controllable vibration source vibratory pump low-frequency high-pressure flow replenishment method provided in this embodiment of the invention;

[0036] Figure 7 A schematic diagram of the hydraulic system of another controllable source vibration pump low-frequency high-pressure flow replenishment device provided in an embodiment of the present invention. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] Before explaining the controllable source vibration pump low-frequency high-pressure flow replenishment device and method provided in the embodiments of the present invention, the application scenarios of the controllable source vibration pump low-frequency high-pressure flow replenishment device and method provided in the embodiments of the present invention will be specifically described:

[0040] In industrial applications of seismic exploration, controllable seismic sources with hydraulically driven reciprocating hammers are commonly used. In such sources, the piston rod is fixed, and the hammer has two double-acting hydraulic cylinders, one above the other. The reciprocating motion of the hammer is driven by switching between high and low pressure in the two working chambers. The reciprocating motion of the hammer is controlled according to the input commands from the control box.

[0041] The controlled vibration source's hydraulic system is designed as a closed-loop system, comprising a high-pressure vibration system and a low-pressure vibration system. The hydraulic system primarily uses a hydraulic pump (called a vibration pump) as its power source. The vibration pump's outlet is connected to the high-pressure system, and its inlet is connected to the low-pressure system. When the controlled vibration source scans at low frequencies, the stroke of the hammer piston within the hydraulic cylinder is greater than that during higher-frequency scanning, requiring more hydraulic oil to be replenished as the hammer piston moves up and down.

[0042] Currently, the vibratory hydraulic pumps used in conventional controlled seismic sources employed by various seismic teams exhibit a time delay of 900ms-1800ms from response to maximum flow output. In the low-frequency band of the controlled seismic source's initial scan, due to this response delay, the pump's flow rate cannot instantly reach its maximum, thus failing to provide sufficient hydraulic oil to the high-pressure vibration system. By the time the pump's flow rate reaches its maximum, the controlled seismic source has already reached the mid-frequency band. Furthermore, because the vibratory hydraulic pump needs to compensate for some of the hydraulic oil released by the nitrogen accumulator in the low-frequency band while supplying oil to the vibration system, this results in a continued shortage of hydraulic oil in the early mid-frequency range. Although the hydraulic accumulator compensates for most of the flow during the initial scan phase, insufficient oil supply and pressure fluctuations still cause an increase in harmonic components and a decrease in transmitted energy during the initial scan phase.

[0043] To address the aforementioned problems, this invention provides a controllable source vibration pump low-frequency high-pressure flow replenishment device, which may include a vibration pump, a vibration high-pressure manifold, a vibration replenishment manifold, hydraulic oil pipes, and a solenoid valve. The outlet of the vibration pump is connected to the vibration high-pressure manifold via hydraulic oil pipes, and the inlet of the vibration pump is connected to the vibration replenishment manifold via hydraulic oil pipes. One end of the solenoid valve is connected to the vibration high-pressure manifold via hydraulic oil pipes, and the other end is connected to the vibration replenishment manifold via hydraulic oil pipes. The solenoid valve is equipped with a control switch, which is used to control the opening and closing of the solenoid valve. In this embodiment of the invention, a solenoid valve is used to connect the high-pressure manifold of the controllable vibration source to the vibration oil replenishment system manifold. Before the controllable vibration source begins scanning, the solenoid valve is controlled to open, allowing the high-pressure flow of the vibration pump to flow to the vibration oil replenishment system first. This enables the vibration pump to reach its maximum flow rate first. When scanning begins, the vibration pump is already operating at its maximum flow rate, effectively ensuring that the vibration pump provides sufficient hydraulic oil in the low-frequency band of the controllable vibration source scan. This effectively solves the problem of the controllable vibration source failing to meet various quality control indicators in the low-frequency band, bringing significant economic and social benefits.

[0044] Figure 1 This is a schematic diagram of a low-frequency high-pressure flow replenishment device for a controllable vibration source vibratory pump provided in an embodiment of the present invention, as shown below. Figure 1As shown, the low-frequency high-pressure flow replenishment device for a controllable vibration source vibratory pump includes a vibratory pump 1, a high-pressure vibration manifold 2, a vibration replenishment manifold 3, hydraulic oil pipes, and a solenoid valve 4. The outlet of the vibratory pump 1 is connected to the high-pressure vibration manifold 2 via a hydraulic oil pipe, and the inlet of the vibratory pump 1 is connected to the vibration replenishment manifold 3 via a hydraulic oil pipe. One end of the solenoid valve 4 is connected to the high-pressure vibration manifold 2 via a hydraulic oil pipe, and the other end is connected to the vibration replenishment manifold 3 via a hydraulic oil pipe. The solenoid valve 4 is equipped with a control switch 6, which is used to control the opening and closing of the solenoid valve 4. The vibration replenishment manifold 3 is connected to the vibration replenishment system 9 of the controllable vibration source, and the vibration replenishment system 9 is connected to the hydraulic oil chamber of the vibratory pump 1, thereby replenishing hydraulic oil to the low-pressure vibration system of the vibratory pump 1.

[0045] Figure 2 This is a schematic diagram of a vibration hydraulic system connected to a controllable vibration source vibration pump and a low-frequency high-pressure flow replenishment device, as provided in an embodiment of the present invention. Figure 2 As shown, the outlet of the vibration pump 1 is connected to the high-pressure vibration manifold 2 via a hydraulic oil pipe, and the inlet of the vibration pump 1 is connected to the low-pressure vibration manifold 7 via a hydraulic oil pipe. The vibrator of the controllable vibration source is equipped with a servo valve 8, which is connected to both the high-pressure vibration manifold 2 and the low-pressure vibration manifold 7, thus forming a vibration hydraulic system. When the controllable vibration source starts scanning, the vibration pump 1 pumps high-pressure hydraulic oil from its outlet. Under the control of the servo valve 8, the oil is fed into the first hydraulic chamber of the vibrator through the high-pressure vibration manifold 2 connected to the outlet of the vibration pump 1. Under the reaction force of the hydraulic oil and the fixed piston, the hammer is moved. At the same time, the hydraulic oil in the second hydraulic chamber is discharged. Under the control of the servo valve 8, the oil returns to the hydraulic chamber of the vibration pump 1 through the low-pressure vibration manifold 7 connected to the inlet of the vibration pump 1, thus forming a hydraulic cycle.

[0046] It should be noted that, in this embodiment of the invention, the vibration pump 1 refers to a vibration hydraulic pump. The vibrator of the controllable vibration source has two hydraulic oil chambers, upper and lower, with a fixed piston rod and piston positioned between them. During scanning, the vibration pump 1 delivers hydraulic oil to the upper hydraulic oil chamber of the vibrator via a high-pressure vibration system. Under the action of the hydraulic oil, the upper hydraulic oil chamber pushes the weight upward along the piston rod. Simultaneously, due to the reduced space in the lower hydraulic oil chamber, the internal hydraulic oil flows back to the hydraulic oil chamber of the vibration pump 1 via a low-pressure vibration system. Under the control of the servo valve 8, the vibration pump 1 again delivers hydraulic oil to the lower hydraulic oil chamber of the vibrator via the high-pressure vibration system. Under the action of the hydraulic oil, the lower hydraulic oil chamber pushes the weight downward along the piston rod, thus completing the reciprocating motion. Those skilled in the art can refer to existing vibrators and their vibration hydraulic systems; this embodiment of the invention will not elaborate further.

[0047] Figure 3 This is a circuit connection diagram of the solenoid valve 4 according to an embodiment of the present invention, as shown below. Figure 3As shown, the power supply line of the solenoid valve 4 is connected in series with the power supply line of the control switch 6, and then connected to the control power supply 10. Specifically, the controllable vibration source can be equipped with a central control panel, which integrates the control power supply 10. The circuit of the solenoid valve 4 is connected to the control power supply 10 in the central control panel. In this embodiment, the control switch 6 can be a power switch 61, used to control the connection and disconnection of the circuit of the solenoid valve 4.

[0048] In this embodiment of the invention, the vibration pump 1 can be a plunger pump. The plunger pump converts mechanical energy into hydraulic pressure energy by driving the swashplate to deliver hydraulic oil from the low-pressure vibration system to the high-pressure vibration system, providing power to the hydraulic system of the controllable vibration source. Before the controllable vibration source begins scanning, the plunger pump delivers high-pressure hydraulic oil to the vibration replenishment system, causing the swashplate of the plunger pump to swing. By pre-determining the time it takes for the swashplate to swing from rest to its maximum swing angle, the solenoid valve 4 is controlled to be on for the corresponding duration, thereby maximizing the flow rate of the plunger pump before the controllable vibration source begins scanning.

[0049] Specifically, such as Figure 1 As shown, the low-frequency high-pressure flow replenishment device for the controllable source vibration pump may also include a high-pressure relief valve 5. The oil outlet of the high-pressure relief valve 5 is connected to the vibration replenishment manifold 3 via a hydraulic oil pipe, and the oil inlet of the high-pressure relief valve 5 is connected to the solenoid valve 4 via a hydraulic oil pipe. The other end of the solenoid valve 4 is connected to the vibration high-pressure manifold 2.

[0050] Furthermore, the set pressure value of the high-pressure relief valve 5 can be adjusted according to actual needs. When the system pressure is lower than the set pressure value of the high-pressure relief valve 5, the valve of the high-pressure relief valve 5 is closed; when the system pressure exceeds the set pressure value of the high-pressure relief valve 5, the high-pressure relief valve 5 opens to generate overflow. Therefore, the set pressure of the high-pressure relief valve 5 can be set to be less than the working pressure of the vibration pump 1. Before the controllable vibration source starts scanning, the solenoid valve 4 is turned on. Due to the pressure difference between the working pressure of the vibration pump 1 and the set pressure of the high-pressure relief valve 5, the high-pressure relief valve 5 generates overflow. The high-pressure hydraulic oil output from the outlet of the vibration pump 1 will flow out from the outlet of the high-pressure relief valve 5 through the vibration high-pressure manifold 2 and the solenoid valve 4, and enter the vibration replenishment system 9 through the vibration replenishment manifold 3.

[0051] In this embodiment, a high-pressure relief valve 5 is installed between the high-pressure vibration manifold 2 and the vibration oil replenishment manifold 3. The set pressure of the high-pressure relief valve 5 is set to be less than the working pressure of the vibration pump 1. In use, before the controllable vibration source starts scanning, the solenoid valve 4 is turned on. Since the hydraulic pressure output by the vibration pump 1 is higher than the set pressure of the high-pressure relief valve 5, the high-pressure hydraulic oil will flow out from the high-pressure relief valve 5, thereby achieving the purpose of making the vibration pump 1 start in advance. By controlling the advance start time of the vibration pump 1, the flow rate of the vibration pump 1 is maximized. Then the solenoid valve 4 is turned off, and the scanning work of the controllable vibration source is started. At this time, the flow rate of the vibration pump 1 has reached the maximum, effectively avoiding the influence of pressure fluctuations caused by the delay in the start of the vibration pump 1 on the scanning results.

[0052] Specifically, the vibration pump 1 can be a variable displacement piston pump. The working pressure of the piston pump is adjusted by regulating the flow rate of the variable displacement piston pump. In this embodiment, the set pressure of the high-pressure relief valve 5 and the working pressure of the vibration pump 1 can be set according to the system pressure when the controllable vibration source begins scanning. The set pressure of the high-pressure relief valve 5 is set to be equal to the set pressure of the vibration hydraulic system during scanning, and the working pressure of the vibration pump 1 is adjusted to be higher than the set pressure of the high-pressure relief valve 5. Before the controllable vibration source begins scanning, the vibration pump 1 is run first. The outlet pressure of the vibration pump 1 is higher than the overflow pressure of the high-pressure relief valve 5. The hydraulic oil flows through the high-pressure vibration manifold 2 to the replenishing oil manifold 3, allowing the vibration pump 1 to reach its maximum flow rate earlier. Furthermore, since the set pressure of the high-pressure relief valve 5 is equal to the system pressure when the controllable vibration source begins scanning, when the vibration pump reaches its maximum flow rate, the solenoid valve 4 is directly closed, the vibrator is started, and the scanning operation begins without further settings, thereby improving the working efficiency of the controllable vibration source.

[0053] Optionally, the high-pressure relief valve 5 can be a pilot-operated relief valve. When the vibrator of a controllable vibration source is working, the required operating pressure of the vibration hydraulic system is relatively high. Correspondingly, the relief valve needs to meet the requirements of the high-pressure system, while ordinary relief valves cannot meet these requirements. Because the pressure on the upper part of the main valve core of a pilot-operated relief valve is determined by the pressure drop between the pilot valve and the damping orifice, the relief pressure of the relief valve is only related to the pressure difference and is not affected by increases in operating pressure. Therefore, even under high system pressure, it can still play an effective pressure regulation role, improving the safety of equipment operation.

[0054] In this embodiment of the invention, the solenoid valve 4 can be a normally closed solenoid valve. Before the controllable vibration source begins scanning, the solenoid valve 4 is turned on to connect the high-pressure vibration manifold 2 and the vibration replenishment manifold 3, and the hydraulic oil pumped from the outlet of the vibration pump 1 flows to the vibration replenishment system 9. When the vibration pump 1 starts scanning, the vibration pump 1 needs to supply oil to the vibrator. At this time, the solenoid valve 4 is closed to cut off the oil circuit between the high-pressure vibration manifold 2 and the vibration replenishment manifold 3. By using a normally closed solenoid valve 4, the solenoid valve 4 is always in a closed state when it is not energized. The solenoid valve coil is only energized when in use. Therefore, the energizing time of the solenoid valve can be reduced, which is beneficial to extending the service life of the equipment. In addition, during the operation of the controllable vibration source scanning, the high-pressure hydraulic oil of the high-pressure vibration manifold 2 is prevented from flowing to the vibration replenishment system 9, ensuring the pressure stability of the vibration hydraulic system.

[0055] Specifically, the inlet of the solenoid valve 4 is connected to the high-pressure vibration manifold 2 via a hydraulic oil pipe, and the outlet of the solenoid valve 4 is connected to the vibration replenishment manifold 3 via a hydraulic oil pipe. The direction of liquid flow in the solenoid valve 4 is from one end of the high-pressure vibration manifold 2 to one end of the vibration replenishment manifold 3.

[0056] It should be noted that in this embodiment, the connection between the solenoid valve 4 and the hydraulic oil pipe can be any kind of sealing connection, such as threaded connection, flange connection, clamp type or welding. Those skilled in the art can choose according to actual needs, and this embodiment of the invention does not limit this.

[0057] Figure 4 This is a circuit connection diagram of another solenoid valve provided in an embodiment of the present invention, as shown below. Figure 4 As shown, the control switch 6 may also include a power switch 61 and a relay 62. The power switch 61 and the relay 62 are connected in series in the control circuit of the solenoid valve 4. The power switch 61 is used to control the circuit to be turned on and off. Those skilled in the art can choose according to their needs. This embodiment does not limit this.

[0058] Specifically, relay 62 is connected in series between the power switch 61 and the solenoid valve 4. During operation, when the power switch 61 is closed, relay 62 is energized, thereby supplying power to the coil of solenoid valve 4, and the solenoid valve 4 circuit is opened. The presence of relay 62 in the control circuit of solenoid valve 4 provides safety protection for the circuit.

[0059] This invention also provides a method for replenishing low-frequency high-pressure flow in a controllable source vibratory pump, applicable to any of the controllable source vibratory pump low-frequency high-pressure flow replenishment devices described above. Figure 5 As shown, the method for replenishing low-frequency high-pressure flow of a controllable source vibratory pump may include the following steps:

[0060] Step 101: Receive the customer's operation command and the controllable source plate of the seismic source falls.

[0061] In this embodiment of the invention, before the controllable seismic source begins scanning, the source plate of the controllable seismic source needs to be lowered to prepare for the scanning operation. In this embodiment, the controllable seismic source is equipped with a control module and a user interface. The user sends a command to lower the source plate through the interface, and the control module receives the user command and controls the lowering of the source plate.

[0062] Specifically, the controllable seismic source has a user interface in its central control console. Users can issue start commands through the operation buttons on the interface, or set up an automatic control system in the control module. Users can input operation commands through the interface to control the drop of the source plate of the controllable seismic source.

[0063] Step 102: After the seismic source plate lands, turn on the control switch to activate the solenoid valve.

[0064] In this embodiment of the invention, the controllable vibration source plate is lowered. After the vibration source plate lands, the control switch is turned on to supply power to the solenoid valve coil, thereby turning on the solenoid valve. The vibration high-pressure manifold and the vibration replenishment manifold are connected. The high-pressure hydraulic oil from the outlet of the vibration pump flows to the vibration replenishment manifold through the vibration high-pressure manifold. The vibration pump continues to operate, so that the flow rate of the vibration pump gradually increases until it reaches the maximum flow rate.

[0065] It should be noted that after the seismic source plate lands successfully, the control system of the controllable seismic source sends a landing completion signal to the central control console's operating interface. Upon receiving the landing completion signal, the control switch is activated to supply power to the solenoid valve coil, thus activating the solenoid valve. Those skilled in the art can refer to the signal feedback system settings after the seismic source plate lands successfully in existing technologies; this embodiment of the invention will not elaborate further on this.

[0066] Specifically, after the seismic source plate lands, the control switch can be activated either by the user through a switch button or by setting an automatic control module in the controllable seismic source. The automatic control module will automatically activate the control switch based on the completion signal fed back after the seismic source plate lands.

[0067] Step 103: After the first preset time is reached, turn off the control switch and disconnect the solenoid valve.

[0068] In this embodiment of the invention, in step 102, the solenoid valve is activated, and the vibration pump supplies oil to the vibration oil replenishment system. After the vibration pump has run for a first preset time, it has reached its maximum flow rate. At this point, the control switch is turned off, the solenoid valve coil is de-energized, and the connection between the high-pressure vibration manifold and the vibration oil replenishment manifold is broken. The vibrator can then be started to begin scanning. The vibration pump supplies oil to the vibrator. Since the vibration pump has reached its maximum flow rate, in the low-frequency range where the controllable vibration source begins scanning, the impact of pressure fluctuations caused by the vibration pump's response delay on the scanning results can be effectively avoided.

[0069] Specifically, the first preset time refers to the duration for which the solenoid valve is turned on. This duration can be determined based on the time it takes for the vibration pump to reach its maximum flow rate. During this duration, the solenoid valve is turned on, and the vibration pump supplies oil to the vibration oil supply system through the vibration high-pressure manifold and the vibration oil supply manifold. This allows the vibration pump to start running before the controllable vibration source begins scanning, so that the flow rate of the vibration pump reaches its maximum in advance.

[0070] like Figure 6 As shown in the figure, this is another method for replenishing low-frequency high-pressure flow of a controllable source vibration pump according to an embodiment of the present invention. This method is applied to the controllable source vibration pump low-frequency high-pressure flow replenishment device as described in any of the above claims, and may include:

[0071] Step 201: Determine the first preset time based on the parameters of the vibration pump.

[0072] In this embodiment of the invention, the time required for the flow rate of the vibrating pump to reach its maximum can be determined based on the parameters of the vibrating pump, and the first preset time can be set to be greater than or equal to that time, thereby ensuring that the flow rate of the vibrating pump can reach its maximum within the first preset time.

[0073] Specifically, based on the parameters of the vibratory pump, such as rotational speed, working pressure, and maximum flow rate, the time required for the vibratory pump's flow rate to increase from mechanical zero to maximum working flow rate can be determined. This time is used as the second preset time, and the first preset time is set based on the second preset time. The first preset time should be greater than or equal to the second preset time, thereby ensuring that the vibratory pump has sufficient running time to reach its maximum flow rate when the scanning work starts.

[0074] It should be noted that "mechanical zero" refers to the state when the flow rate displayed on the vibratory pump is zero. The maximum operating flow rate of the vibratory pump can be determined based on the actual operating flow rate during use.

[0075] Step 202: Receive the customer's operation command and the controllable source plate of the seismic source falls.

[0076] In this embodiment of the invention, before the controllable seismic source begins scanning, the source plate of the controllable seismic source needs to be lowered to prepare for the scanning operation. Specifically, the controllable seismic source is equipped with a control module and a user interface. The user sends a command to lower the source plate through the interface, and the control module receives the user command and controls the lowering of the source plate.

[0077] Step 203: After the seismic source plate lands, turn on the control switch to activate the solenoid valve.

[0078] In this embodiment of the invention, the controllable vibration source plate is lowered. After the plate lands, a control switch is activated to power the solenoid valve coil, thereby activating the solenoid valve. This connects the high-pressure vibration manifold and the oil replenishment manifold, allowing high-pressure hydraulic oil from the vibration pump outlet to flow through the high-pressure manifold to the oil replenishment manifold. The vibration pump continues to operate, gradually increasing its flow rate until it reaches its maximum. Specifically, after the plate lands, the control system of the controllable vibration source sends a landing completion signal to the central control panel. Upon receiving the landing completion signal, the control switch is activated to power the solenoid valve coil.

[0079] Step 204: After the first preset time is reached, turn off the control switch and disconnect the solenoid valve.

[0080] In this embodiment of the invention, after the solenoid valve is turned on, the vibration pump supplies oil to the vibration oil replenishment system. When the vibration pump has run for a first preset time, it has reached its maximum flow rate. At this time, the control switch is turned off, the solenoid valve coil is de-energized, and the passage between the high-pressure vibration manifold and the vibration oil replenishment manifold is disconnected. At the same time, the vibrator is started to begin scanning. The vibration pump supplies oil to the vibrator. Since the vibration pump has reached its maximum flow rate, in the low-frequency range where the controllable vibration source begins scanning, the influence of pressure fluctuations caused by the response delay of the vibration pump on the scanning results can be effectively avoided.

[0081] Figure 7 This is a schematic diagram of an embodiment of the controllable vibration source vibration pump low-frequency high-pressure flow replenishment device provided by the present invention. Figure 7As shown, the low-pressure end of the vibration pump 1 is connected to the low-pressure vibration manifold 7, and the high-pressure end of the vibration pump 1 is connected to the high-pressure vibration manifold 2. During the controllable source scanning operation, the vibration pump 1 pumps high-pressure hydraulic oil from its outlet, which is then input into the first hydraulic chamber of the vibrator 11 through the high-pressure vibration manifold 2, driving the vibrator 11 to work. Simultaneously, the hydraulic oil in the second hydraulic chamber of the vibrator 11 is discharged and returns to the hydraulic oil chamber of the vibration pump 1 through the low-pressure vibration manifold 7, thus forming a hydraulic circulation. In this embodiment, the high-pressure vibration manifold 2 is connected to the vibration replenishment manifold 3 using hydraulic oil pipe 12 and solenoid valve 4. Before the controllable source begins scanning, the solenoid valve 4 is controlled to open, allowing the hydraulic oil output from the high-pressure end of the vibration pump 1 to return to the input end of the vibration pump 1 through the vibration replenishment manifold 3. This allows the vibration pump 1 to reach its maximum flow rate first, and then operate at its maximum flow rate during the scanning operation, effectively ensuring that the vibration pump provides sufficient hydraulic oil in the low-frequency band of the controllable source scanning.

[0082] It should be noted that, Figure 7 The diagram only illustrates a simplified connection structure of a controllable source vibration system. The vibration system may include other connecting components, which can be referenced from the settings in the prior art. This embodiment will not elaborate further.

[0083] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0084] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. For the method embodiments, since they are basically similar to the device embodiments, the description is relatively simple; relevant parts can be referred to the descriptions of the device embodiments.

[0085] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A low-frequency high-pressure flow replenishment device for a controllable source vibration pump, characterized in that, include: Vibration pump, vibration high-pressure manifold, vibration oil replenishment manifold, hydraulic oil pipes and solenoid valves; The outlet of the vibration pump is connected to the high-pressure vibration manifold via the hydraulic oil pipe; the inlet of the vibration pump is connected to the vibration replenishment manifold via the hydraulic oil pipe. One end of the solenoid valve is connected to the high-pressure vibration manifold via the hydraulic oil pipe, and the other end is connected to the vibration replenishment oil manifold via the hydraulic oil pipe. The solenoid valve is equipped with a control switch, which is used to control the opening and closing of the solenoid valve; The device also includes a high-pressure relief valve; The outlet of the high-pressure relief valve is connected to the vibration replenishment manifold via the hydraulic oil pipe; the inlet of the high-pressure relief valve is connected to the solenoid valve via the hydraulic oil pipe. The set pressure of the high-pressure relief valve is less than the working pressure of the vibration pump.

2. The controllable source vibration pump low-frequency high-pressure flow replenishment device according to claim 1, characterized in that, The vibration pump is a plunger pump.

3. The controllable source vibration pump low-frequency high-pressure flow replenishment device according to claim 2, characterized in that, The plunger pump is a variable displacement plunger pump.

4. The low-frequency high-pressure flow replenishment device for a controllable source vibration pump according to claim 1, characterized in that, The high-pressure relief valve is a pilot-operated relief valve.

5. The low-frequency high-pressure flow replenishment device for a controllable source vibration pump according to claim 1, characterized in that, The solenoid valve is a normally closed solenoid valve.

6. The low-frequency high-pressure flow replenishment device for a controllable source vibration pump according to claim 1, characterized in that, The control switch also includes a relay, which is electrically connected to the solenoid valve.

7. A method for replenishing low-frequency high-pressure flow in a controllable source vibratory pump, applied to the controllable source vibratory pump low-frequency high-pressure flow replenishment device according to any one of claims 1-6, characterized in that, include: Upon receiving a customer's operation command, the controllable source plate descends. After the seismic source plate lands, the control switch is turned on, and the solenoid valve is activated. After the first preset time is reached, the control switch is turned off, and the solenoid valve is disconnected.

8. The method for replenishing low-frequency high-pressure flow of a controllable source vibration pump according to claim 7, characterized in that, Before the controllable seismic source plate falls after receiving the customer's operation command, it also includes: The first preset time is determined based on the parameters of the vibration pump.

9. The method for replenishing low-frequency high-pressure flow of a controllable source vibration pump according to claim 8, characterized in that, Determining the first preset time based on the parameters of the vibration pump includes: Determine the second preset time required for the flow rate of the vibration pump to increase from mechanical zero to the maximum operating flow rate; Set the first preset time, which is greater than or equal to the second preset time.

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