Hydraulic control system and method for underwater lightweight intervention equipment

Abstract

A hydraulic control system for underwater lightweight intervention equipment. The hydraulic control system comprises an underwater electronic control module (1), an accumulator group module (2), and a valve group module. The underwater electronic control module is electrically connected to the accumulator group module and the valve group module; the accumulator group module is connected to the valve group module; the accumulator group module is used for charging the valve group module; the valve group module comprises a normal-pressure valve group (4) and a high-pressure valve group (5); the normal-pressure valve group and the high-pressure valve group are both connected to the accumulator group module; the normal-pressure valve group provides normal pressure; the high-pressure valve group provides high pressure. Also disclosed is a hydraulic control method. The lightweight intervention equipment does not need the installation of a riser; the present invention has the advantages such as simple operation, small device size, and no need for full production shutdown, and can significantly shorten operation time and reduce operation cost.

Description

Hydraulic control system and method for underwater light intervention equipment TECHNICAL FIELD

[0001] The present application belongs to the technical field of ocean engineering, and particularly relates to a hydraulic control system and method for underwater light intervention equipment. BACKGROUND

[0002] When a marine oil and gas well is damaged during the service period, the oil and gas well needs to be repaired to restore it to a normal operating state. The traditional well repair method uses a standpipe to perform well repair operations, which has the problems of long repair cycle, large personnel input, and serious resource consumption.

[0003] As a new type of underwater operation method, the underwater light intervention equipment can perform standpipe-free underwater intervention operations with the help of a dedicated work ship. Compared with the traditional well repair operation, the underwater light intervention equipment has the advantages of high repair efficiency, small personnel input, and high safety and reliability. However, no operation examples have been found in domestic areas.

[0004] The hydraulic control system is lowered to the seabed underwater 1500m by a hydraulic winch. The external environment characteristics of the hydraulic control system are: extreme service environment, low temperature and high pressure, and serious corrosion. The internal environment of the hydraulic control system is: high pressure and corrosion. The commonly used hydraulic control system cannot meet the above requirements.

[0005] Therefore, it is urgent to design a hydraulic control system and method for underwater light intervention equipment to solve the above problems. TECHNICAL PROBLEM

[0006] The traditional well repair method uses a standpipe to perform well repair operations, which has the problems of long repair cycle, large personnel input, and serious resource consumption. SOLUTION

[0007] The purpose of the present application is to provide a hydraulic control system and method for underwater light intervention equipment, which has the advantages of using a high-pressure oil liquid pressure increasing and decreasing valve device, supplying energy to a high-pressure valve group and a normal-pressure valve group, reducing the use of low-pressure oil liquid, and saving cost, and solves the problems mentioned in the background art.

[0008] To achieve the above purpose, the specific technical scheme of the hydraulic control system and method for underwater light intervention equipment of the present application is as follows:

[0009] The hydraulic control system of the underwater light intervention equipment comprises an underwater electric control module, an accumulator group module and a valve group module, the underwater electric control module is electrically connected with the accumulator group module and the valve group module, the accumulator group module is connected with the valve group module, the accumulator group module is used for charging the valve group module, the valve group module comprises a normal pressure valve group and a high pressure valve group, the normal pressure valve group and the high pressure valve group are connected with the accumulator group module, the normal pressure is provided through the normal pressure valve group, and the high pressure is provided through the high pressure valve group.

[0010] Further, the underwater electric control module comprises an intervention equipment electronic bin and a umbilical terminal joint, the intervention equipment electronic bin receives the control signal from the water surface master control station through the umbilical terminal joint, and the intervention equipment electronic bin controls the electronic elements in the accumulator group module and the valve group module.

[0011] Further, the accumulator group module comprises a high pressure accumulator, the high pressure accumulator is provided with an inlet end and an outlet end, the inlet end of the high pressure accumulator is connected with the umbilical terminal joint through an electro-hydraulic umbilical cable, the electro-hydraulic umbilical cable is sequentially provided with a high pressure accumulator charging electric switch and a high pressure accumulator liquid charging valve, the high pressure accumulator charging electric switch is electrically connected with the intervention equipment electronic bin, when the intervention equipment electronic bin controls the high pressure accumulator charging electric switch to be opened, the electro-hydraulic umbilical cable is charged through the umbilical terminal joint, and the oil liquid is charged into the high pressure accumulator through the high pressure accumulator charging electric switch and the high pressure accumulator liquid charging valve.

[0012] Further, the accumulator group module further comprises a high pressure accumulator reducing joint, a high pressure accumulator ball valve and an oil liquid filter, the high pressure accumulator reducing joint is connected with the outlet end of the high pressure accumulator, the high pressure accumulator reducing joint is connected with the inlet end of the high pressure accumulator ball valve through a pipeline, the high pressure accumulator ball valve controls the opening and closing of the high pressure accumulator, the outlet end of the high pressure accumulator ball valve is connected with a flow meter, and the flow meter is connected with the inlet end of the oil liquid filter through a pipeline. The hydraulic oil discharged from the outlet end of the high pressure accumulator is filtered in the oil liquid filter.

[0013] Further, the accumulator group module further comprises an overflow valve and a pressure reducing valve, the inlet end of the overflow valve is connected with the outlet end of the oil liquid filter, when the pressure in the hydraulic pipeline exceeds the rated pressure due to a fault, the overflow valve is opened to release the pressure of the hydraulic system, the outlet end of the overflow valve is connected with the valve group module through a pipeline, and the pressure reducing valve is arranged on the pipeline between the overflow valve and the valve group module, so that the high pressure oil liquid is reduced to a set oil liquid pressure.

[0014] Further, the normal pressure valve group comprises a solenoid valve, the inlet end of the solenoid valve is connected with the outlet end of the pressure reducing valve, the solenoid valve is electrically connected with the intervention equipment electronic bin, the outlet end of the solenoid valve is connected with a hydraulic quick connector through a pipeline, the hydraulic quick connector can be connected with the pipeline joint under water to provide the normal pressure, and a one-way throttle valve is arranged on the pipeline between the solenoid valve and the hydraulic quick connector.

[0015] Further, the high-pressure valve group comprises a pilot valve accumulator liquid filling valve and a pilot valve accumulator energy charging electric switch, the inlet end of the pilot valve accumulator liquid filling valve is connected with the umbilical cable energy charging joint, the outlet end of the pilot valve accumulator liquid filling valve is connected with the inlet end of the pilot valve accumulator, the outlet end of the pilot valve accumulator is connected with the pilot hydraulic valve, the pilot valve accumulator energy charging electric switch is electrically connected with the intervention equipment electronic warehouse, when the pilot hydraulic valve receives the opening instruction from the intervention equipment electronic warehouse, the pilot hydraulic valve is turned on, the high-pressure oil path enters the preset actuator, and the valve group in the preset actuator is opened or closed.

[0016] An underwater light intervention equipment hydraulic control method using the underwater light intervention equipment hydraulic control system in any one of claims 1-7, comprising the following steps:

[0017] S1, the intervention equipment electronic warehouse receives the control signal from the water surface master control station through the umbilical cable terminal joint;

[0018] S2, the accumulator energy charging electric switch is opened, the electro-hydraulic umbilical cable is charged through the umbilical cable terminal joint, and the oil is filled into the high-pressure accumulator through the high-pressure accumulator liquid filling valve;

[0019] S3, the high-pressure accumulator ball valve is opened, the high-pressure accumulator is controlled to be opened, and the flowmeter records the liquid flow in the hydraulic pipeline;

[0020] S4, the oil filter filters the hydraulic oil flowing out of the high-pressure accumulator;

[0021] S5, when the pressure in the hydraulic pipeline exceeds the rated pressure due to a fault, the overflow valve is opened to release the pressure of the hydraulic system;

[0022] S6, the pressure reducing valve is opened, the high-pressure oil from the high-pressure accumulator passes through the pressure reducing valve, and the high-pressure oil pressure is reduced to a set value;

[0023] S7, the oil enters the normal-pressure valve group and / or the high-pressure valve group to form normal pressure and / or high pressure;

[0024] S8, the sensor group records in real time and converts the obtained digital signal into an electric signal, and transmits the electric signal to the intervention equipment electronic warehouse.

[0025] Further, in S7, when the oil enters the normal-pressure valve group, the following steps are included:

[0026] S11, the oil after pressure reduction passes through the hydraulic control check valve, and the oil converges in the shuttle valve through the hydraulic control check valve;

[0027] S12, the oil after passing through the shuttle valve is separated into two sub-oil paths by a main oil path, and then injected into the corresponding normal-pressure valve group through the two sub-oil paths;

[0028] S13, the atmospheric pressure valve group injects corresponding oil into the corresponding actuator according to the oil injection condition, the actuator is opened, and the control of the underwater light intervention equipment hydraulic control system is completed.

[0029] Further, when the oil enters the high-pressure valve group in S7, the following steps are included:

[0030] S21, the pilot valve accumulator provides pilot liquid for the pilot hydraulic valve;

[0031] S22, when the pilot hydraulic valve receives an opening instruction from the intervention equipment electronic bin, the pilot hydraulic valve is turned on, the high-pressure oil circuit enters the preset actuator, and the valve group in the preset actuator is opened or closed;

[0032] S23, the high-pressure valve group injects corresponding oil into the corresponding actuator according to the oil injection condition, the actuator is opened, and the control of the underwater light intervention equipment hydraulic control system is completed. Beneficial effects

[0033] The present application has the following advantages:

[0034] (1) Compared with the heavy intervention device operation, the intervention is carried out through the standpipe, the equipment is lowered into the wellbore for operation, the equipment is large, a large space is needed, the operation difficulty of the intervention technology is large, and there is high risk and cost; the light intervention equipment does not need to install the standpipe, has the advantages of simple operation, small equipment and no need to completely stop production, and can greatly shorten the operation time and reduce the operation cost.

[0035] (2) The redundant underwater SEM (underwater electronic module) of the present application ensures that the underwater light intervention equipment can reliably and stably operate in a deep water environment.

[0036] (3) The present application adopts the energy supply mode of the electro-hydraulic umbilical cable connected to the high-pressure accumulator, which avoids the problem of poor flexibility of the traditional standpipe operation and well repair operation.

[0037] (4) The electro-hydraulic umbilical cable is connected through the umbilical cable connector, and then the upper end of the accumulator is connected, the high-pressure oil liquid pressure increasing and reducing valve device is used to supply energy to the high-pressure valve group and the atmospheric pressure valve group, and the use of low-pressure oil liquid is reduced, which is conducive to cost saving.

[0038] (5) The high-pressure and low-pressure enter the hydraulic control valve group before the redundant design, as long as one way of oil liquid is connected on the left and right sides of the shuttle valve, the valve group can be energized, the 2-way redundant mode is adopted, and the safety and reliability of the valve group function are improved. BRIEF DESCRIPTION OF DRAWINGS

[0039] Fig. 1 is a schematic diagram of the overall structure of the hydraulic control system of the present application;

[0040] Fig. 2 is a structural schematic diagram of the underwater electric control module of the present application;

[0041] Fig. 3 is a structural schematic diagram of the accumulator group module of the present application;

[0042] Fig. 4 is a structural schematic diagram of the valve group module of the present application;

[0043] Fig. 5 is a structural schematic diagram of the high-pressure accumulator of the present application;

[0044] Fig. 6 is a structural schematic diagram of the valve seat and valve seat support frame of the present application;

[0045] Marked description in the figure: 1, underwater electric control module; 11, interventional equipment electronic warehouse; 12, electronic warehouse module support plate; 13, umbilical cable terminal joint; 2, accumulator group module; 21, high-pressure accumulator; 22, high-pressure accumulator liquid filling valve; 23, high-pressure accumulator energy charging electric switch; 24, high-pressure accumulator reducing joint; 25, high-pressure accumulator ball valve; 26, oil filter; 27, pressure reducing valve; 28, flow meter; 29, hydraulic control check valve; 3, high-pressure accumulator support frame; 32, high-pressure accumulator axial support plate; 33, high-pressure accumulator support plate; 4, normal pressure valve group; 41, electromagnetic valve; 42, temperature and pressure sensor group; 43, hydraulic quick connector; 44, check throttle valve; 45, first valve group; 46, second valve group; 5, high-pressure valve group; 51, pilot valve accumulator energy charging electric switch; 52, pilot valve accumulator liquid filling valve; 53, pilot valve accumulator; 54, pilot hydraulic valve; 6, first electromagnetic valve seat support frame; 61, first electromagnetic valve seat; 62, second electromagnetic valve seat support frame; 63, second electromagnetic valve seat; 64, pilot valve seat support frame; 65, pilot valve seat. Embodiment of the present application

[0046] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0047] Those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0048] An underwater light-weight intervention equipment hydraulic control system and method are described below with reference to Figs. 1-6.

[0049] The underwater light-weight intervention equipment hydraulic control system comprises an underwater electric control module 1, an accumulator group module 2 and a valve group module, the underwater electric control module 1 is electrically connected with the accumulator group module 2 and the valve group module, the accumulator group module 2 is connected with the valve group module, the accumulator group module 2 is used for charging the valve group module, the valve group module comprises a normal pressure valve group 4 and a high pressure valve group 5, the normal pressure valve group 4 and the high pressure valve group 5 are connected with the accumulator group module 2, the normal pressure is provided through the normal pressure valve group 4, and the high pressure is provided through the high pressure valve group 5.

[0050] The underwater electric control module 1 comprises an intervention equipment electronic bin 11 and a umbilical terminal joint 13, the intervention equipment electronic bin 11 receives a control signal from a water surface master control station through the umbilical terminal joint 13, and the intervention equipment electronic bin 11 controls electronic elements in the accumulator group module 2 and the valve group module.

[0051] Further, the underwater electric control module 1 is supported by an electronic bin module support plate 12, and a support contact surface is connected in a flange sealing manner.

[0052] Preferably, the specific number of the intervention equipment electronic bin 11 is two, which are a main electronic bin and a backup electronic bin, the main electronic bin and the backup electronic bin both receive a control signal from a water surface master control station through the umbilical terminal joint 13, and the main electronic bin and the backup electronic bin are redundant to each other, when one of the electronic bins fails, the other electronic bin will become a new master control station and undertake the function of controlling the underwater module, and in other embodiments of the present application, the specific number of the intervention equipment electronic bin 11 can also be multiple, as long as the electronic bins can be redundant to each other.

[0053] The accumulator group module 2 comprises a high pressure accumulator 21, the high pressure accumulator 21 is provided with an inlet end and an outlet end, the inlet end of the high pressure accumulator 21 is connected with the umbilical terminal joint 13 through an electro-hydraulic umbilical, the electro-hydraulic umbilical is sequentially provided with a high pressure accumulator charging electric switch 23 and a high pressure accumulator liquid charging valve 22, the high pressure accumulator charging electric switch 23 is electrically connected with the intervention equipment electronic bin 11, when the intervention equipment electronic bin 11 controls the high pressure accumulator charging electric switch 23 to be opened, the electro-hydraulic umbilical charges through the umbilical terminal joint 13, and oil liquid is charged into the high pressure accumulator 21 through the high pressure accumulator charging electric switch 23 and the high pressure accumulator liquid charging valve 22.

[0054] The accumulator group module 2 further comprises a high-pressure accumulator reducing joint 24, a high-pressure accumulator ball valve 25 and an oil filter 26, the high-pressure accumulator reducing joint 24 is connected with an outlet end of the high-pressure accumulator, the high-pressure accumulator reducing joint 24 is connected with an inlet end of the high-pressure accumulator ball valve 25 through a pipeline, the high-pressure accumulator ball valve 25 controls opening and closing of the high-pressure accumulator 21, an outlet end of the high-pressure accumulator ball valve 25 is connected with a flow meter 28, the flow meter 28 is connected with an inlet end of the oil filter 26 through a pipeline, and hydraulic oil discharged from the outlet end of the high-pressure accumulator 21 is filtered in the oil filter 26.

[0055] The accumulator group module 2 further comprises an overflow valve and a pressure reducing valve 27, an inlet end of the overflow valve is connected with an outlet end of the oil filter 26, when pressure in the hydraulic pipeline exceeds rated pressure due to a fault, the overflow valve is opened to release pressure of the hydraulic system, an outlet end of the overflow valve is connected with the valve group module through a pipeline, and the pressure reducing valve 27 is arranged on a pipeline between the overflow valve and the valve group module to reduce high-pressure oil to a set oil pressure.

[0056] The high-pressure accumulator 21 is axially and radially supported by a high-pressure accumulator support frame 3 and a high-pressure accumulator axial support plate 32, the high-pressure accumulator support frame 3 is threadedly connected to the high-pressure accumulator axial support plate 32, the accumulator group module 2 is mainly supported by a high-pressure accumulator support plate 33, a lower part of the high-pressure accumulator axial support plate 32 is threadedly connected to an upper end of the high-pressure accumulator support plate 33, the oil filter 26 is connected with the high-pressure accumulator support plate 33 through a bottom surface of a flange of the oil filter 26, and the overflow valve and the pressure reducing valve 27 are threadedly connected to an overflow valve support plate.

[0057] The high-pressure accumulator charging valve 22 is connected with a high-pressure accumulator charging electric switch 23 to form a charging tool.

[0058] Preferably, the high-pressure accumulator 21 is connected with the charging tool, and the same combination mode is four, the four high-pressure accumulators 21 are distributed in a square shape, the high-pressure accumulator charging electric switches 23 of the high-pressure accumulators 21 are connected with each other, two horizontal and vertical pipelines are connected to the same pipeline through a tee joint, and then connected with the electro-hydraulic umbilical cable terminal connector 13. When the high-pressure accumulators 21 are charged, the four high-pressure accumulator charging electric switches 23 can control power-on and power-off of the electric switches according to control signals to realize remote control of the electric switches, and further control charging conditions in the high-pressure accumulators 21, and in other embodiments of the application, the specific number of the high-pressure accumulators 21 can also be other numbers.

[0059] Further, the atmospheric pressure valve group 4 comprises an electromagnetic valve 41, the inlet end of the electromagnetic valve 41 is connected with the outlet end of the pressure reducing valve 27, the electromagnetic valve 41 is electrically connected with the intervention equipment electronic cabinet 11, the outlet end of the electromagnetic valve 41 is connected with a hydraulic quick connector 43 through a pipeline, the hydraulic quick connector 43 can be connected with a pipeline joint under water to supply atmospheric pressure, and a one-way throttle valve 44 is connected on the pipeline between the electromagnetic valve 41 and the hydraulic quick connector 43.

[0060] The atmospheric pressure valve group 4 further comprises a temperature and pressure sensor group 42.

[0061] The oil liquid reduced by the pressure reducing valve 27 is connected with the hydraulic control one-way valve 29, and then the pipelines on the left and right sides are merged into a shuttle valve, the oil liquid passes through the shuttle valve, is separated into two auxiliary oil roads by a main oil road, and then the two auxiliary oil roads provide main oil roads for the first valve group 45 and the second valve group 46 respectively.

[0062] Preferably, the first valve group 45 comprises 12 electromagnetic valves on the left side, which are installed on the top of the first electromagnetic valve seat 61, the first electromagnetic valve seat 61 is installed on the upper surface of the first electromagnetic valve seat support frame 6, and the first electromagnetic valve seat support frame 6 is connected with the valve seat support plate through the bottom threaded hole; the second valve group 46 comprises 10 electromagnetic valves on the right side, which are installed on the top of the second electromagnetic valve seat 63, the second electromagnetic valve seat 63 is installed on the upper surface of the second electromagnetic valve seat support frame 62, and the second electromagnetic valve seat support frame 62 is connected with the valve seat support plate through the bottom threaded hole, and in other embodiments of the present application, the number of electromagnetic valves can also be other numbers.

[0063] Preferably, the electromagnetic valve is a two-position three-way electromagnetic valve, and in other embodiments of the present application, it can also be other types of electromagnetic valves.

[0064] The high-pressure valve group 5 comprises a pilot valve accumulator liquid filling valve 52 and a pilot valve accumulator energy charging electric switch 51, the inlet end of the pilot valve accumulator liquid filling valve 52 can be connected with the umbilical cable energy charging joint, the outlet end of the pilot valve accumulator liquid filling valve 52 is connected with the inlet end of the pilot valve accumulator 54, the outlet end of the pilot valve accumulator 54 is connected with the pilot hydraulic valve 54, the pilot valve accumulator energy charging electric switch 51 is electrically connected with the intervention equipment electronic cabinet 11, when the pilot hydraulic valve 54 receives the opening instruction from the intervention equipment electronic cabinet 11, the pilot hydraulic valve 54 is turned on, the high-pressure oil road enters the inside of the preset actuator, and the valve group in the preset actuator is opened or closed.

[0065] A hydraulic control method of an underwater light intervention equipment, using the hydraulic control system of the underwater light intervention equipment according to any one of the above claims 1-7, comprising the following steps:

[0066] S1, the intervention equipment electronic cabinet 11 receives the control signal from the water surface master control station through the umbilical cable terminal joint 13;

[0067] S2, the accumulator charging electric switch is opened, and the electro-hydraulic umbilical cable is charged through the umbilical cable terminal joint 13, and the oil is filled into the high-pressure accumulator through the high-pressure accumulator charging valve 22;

[0068] S3, the high-pressure accumulator ball valve 25 is opened, the control high-pressure accumulator is opened, and the flowmeter 28 records the liquid flow in the hydraulic pipeline;

[0069] S4, the oil filter 26 filters the hydraulic oil flowing out of the high-pressure accumulator;

[0070] S5, when the pressure in the hydraulic pipeline exceeds the rated pressure due to failure, the overflow valve is opened to release the pressure of the hydraulic system;

[0071] S6, the pressure reducing valve 27 is opened, the high-pressure oil from the high-pressure accumulator passes through the pressure reducing valve 27, and the high-pressure oil pressure is reduced to a set value;

[0072] S7, the oil enters the normal pressure valve group 4 and / or the high-pressure valve group 5 to form normal pressure and / or high pressure;

[0073] S8, the sensor group records in real time and converts the obtained digital signal into an electrical signal, and transmits it to the intervention equipment electronic warehouse 11.

[0074] Further, in S7, when the oil enters the normal pressure valve group 4, the following steps are included:

[0075] S11, the oil after pressure reduction passes through the hydraulic control check valve 29, and the oil passes through the hydraulic control check valve 29 and converges in the shuttle valve;

[0076] S12, the oil after passing through the shuttle valve is separated into two sub-oil paths by a main oil path, and then injected into the corresponding normal pressure valve group 4 through the two sub-oil paths;

[0077] S13, the normal pressure valve group 4 injects the corresponding oil into the corresponding actuator according to the oil injection condition, the actuator is opened, and the control of the underwater light intervention equipment hydraulic control system is completed.

[0078] Further, in S7, when the oil enters the high-pressure valve group 5, the following steps are included:

[0079] S21, the pilot accumulator 54 provides pilot liquid for the pilot hydraulic valve 54;

[0080] S22, when the pilot hydraulic valve 54 receives the opening instruction from the intervention equipment electronic warehouse 11, the pilot hydraulic valve 54 is connected, the high-pressure oil path enters the inside of the preset actuator, and the valve group in the preset actuator is opened or closed;

[0081] S23, the high pressure valve group 5 according to the oil injection situation, corresponding oil injection into the corresponding actuator, actuator open, complete the control of the hydraulic control system of the underwater light intervention equipment.

[0082] The advantages of the present application are that, compared with heavy intervention device operation, the use of standpipe intervention, the equipment is lowered into the wellbore through the standpipe for operation, the equipment is large and needs to occupy a large space, the operation difficulty of the intervention technology is large, and there is high risk and cost; the light intervention equipment does not need to install the standpipe, has the advantages of simple operation, small equipment, no need to completely stop production, etc., can greatly shorten the operation time and reduce the operation cost, secondly, the redundant underwater SEM (underwater electronic module) of the present application ensures the reliable and stable operation of the underwater light intervention equipment in the water depth environment, at the same time, the present application adopts the energy supply mode of the umbilical cable connected with the high-pressure accumulator, avoids the problem of poor flexibility of the traditional standpipe operation and well repair operation, and the umbilical cable joint of the present application is connected with the electro-hydraulic umbilical cable, and then the upper end of the accumulator is connected, the device of the high-pressure oil liquid pressure increasing and reducing valve is used to supply energy to the high-pressure valve group and the normal-pressure valve group, reduces the use of low-pressure oil liquid, is beneficial to saving cost, and the present application adopts the redundant design before the high-pressure and low-pressure enters the hydraulic control valve group, as long as one way of oil liquid is connected on the left and right sides of the shuttle valve, the valve group can be supplied with energy, the safety and reliability of the valve group function are improved by adopting the 2-way redundant mode.

[0083] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be exhausted. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the claims of the present application. Industrial applicability

[0084] The underwater light intervention equipment hydraulic control system and method avoid the problem of poor flexibility of the traditional standpipe operation and well repair operation, reduce the use of low-pressure oil liquid, are beneficial to saving cost, and improve the safety and reliability of the valve group function.

Claims

1. A hydraulic control system for a lightweight underwater intervention equipment, characterized in that, It includes an underwater electronic control module, an accumulator module, and a valve module. The underwater electronic control module is electrically connected to the accumulator module and the valve module. The accumulator module is connected to the valve module. The accumulator module is used to charge the valve module. The valve module includes a normal pressure valve group and a high pressure valve group. Both the normal pressure valve group and the high pressure valve group are connected to the accumulator module. Normal pressure is provided through the normal pressure valve group, and high pressure is provided through the high pressure valve group.

2. The hydraulic control system for underwater lightweight intervention equipment according to claim 1, characterized in that, The underwater electrical control module includes an intervention equipment electronic compartment and an umbilical cable terminal connector. The intervention equipment electronic compartment receives control signals from the surface main control station through the umbilical cable terminal connector. The intervention equipment electronic compartment controls the electronic components in the accumulator group module and the valve group module.

3. The hydraulic control system for underwater lightweight intervention equipment according to claim 2, characterized in that, The accumulator module includes a high-voltage accumulator, which has an inlet and an outlet. The inlet of the high-voltage accumulator is connected to the umbilical cable terminal connector via an electro-hydraulic umbilical cable. The electro-hydraulic umbilical cable is equipped with a high-voltage accumulator charging electric switch and a high-voltage accumulator filling valve in sequence. The high-voltage accumulator charging electric switch is electrically connected to the interventional equipment electronic compartment. When the interventional equipment electronic compartment controls the high-voltage accumulator charging electric switch to open, the electro-hydraulic umbilical cable is charged through the umbilical cable terminal connector, and the oil is charged into the high-voltage accumulator through the high-voltage accumulator charging electric switch and the high-voltage accumulator filling valve.

4. The hydraulic control system for underwater lightweight intervention equipment according to claim 3, characterized in that, The accumulator module also includes a high-pressure accumulator reducer, a high-pressure accumulator ball valve, and an oil filter. The high-pressure accumulator reducer is connected to the outlet end of the high-pressure accumulator. The high-pressure accumulator reducer is connected to the inlet end of the high-pressure accumulator ball valve through a pipe. The high-pressure accumulator ball valve controls the opening and closing of the high-pressure accumulator. A flow meter is connected to the outlet end of the high-pressure accumulator ball valve. The flow meter is connected to the inlet end of the oil filter through a pipe. The hydraulic oil discharged from the outlet end of the high-pressure accumulator is filtered by the oil filter.

5. The hydraulic control system for underwater lightweight intervention equipment according to claim 4, characterized in that, The accumulator module also includes an overflow valve and a pressure reducing valve. The inlet end of the overflow valve is connected to the outlet end of the oil filter. When the pressure in the hydraulic pipeline exceeds the rated pressure due to a fault, the overflow valve opens to release the pressure in the hydraulic system. The outlet end of the overflow valve is connected to the valve group module through a pipeline. A pressure reducing valve is installed on the pipeline between the overflow valve and the valve group module to reduce the high-pressure oil to the set oil pressure.

6. The hydraulic control system for underwater lightweight intervention equipment according to claim 5, characterized in that, The atmospheric pressure valve assembly includes a solenoid valve. The inlet of the solenoid valve is connected to the outlet of the pressure reducing valve. The solenoid valve is electrically connected to the electronic compartment of the intervention equipment. The outlet of the solenoid valve is connected to a hydraulic quick connector via a pipeline. The hydraulic quick connector can be connected to an underwater pipeline connector for atmospheric pressure. A one-way throttle valve is connected to the pipeline between the solenoid valve and the hydraulic quick connector.

7. The hydraulic control system for underwater lightweight intervention equipment according to claim 5, characterized in that, The high-pressure valve assembly includes a pilot valve accumulator charging valve and a pilot valve accumulator charging electric switch. The inlet end of the pilot valve accumulator charging valve can be connected to the umbilical cable charging connector, and the outlet end of the pilot valve accumulator charging valve is connected to the inlet end of the pilot valve accumulator. The outlet end of the pilot valve accumulator is connected to a pilot-operated hydraulic valve. The pilot valve accumulator charging electric switch is electrically connected to the interventional equipment electronic compartment. When the pilot-operated hydraulic valve receives an opening command from the interventional equipment electronic compartment, the pilot-operated hydraulic valve is turned on, and the high-pressure oil circuit enters the preset actuator, causing the valve assembly in the preset actuator to open or close.

8. A hydraulic control method for underwater lightweight intervention equipment, characterized in that, The use of the underwater lightweight intervention equipment hydraulic control system as described in any one of claims 1-7 includes the following steps: S1. The intervention equipment electronic compartment receives control signals from the surface main control station through the umbilical cable terminal connector; S2. The accumulator charging electric switch is opened, the electro-hydraulic umbilical cable is charged through the umbilical cable terminal joint, and the oil is charged into the high-pressure accumulator through the high-pressure accumulator charging valve. S3. The high-pressure accumulator ball valve opens, controlling the high-pressure accumulator to open, and the flow meter records the liquid flow rate in the hydraulic pipeline. S4. The oil filter filters the hydraulic oil flowing out of the high-pressure accumulator; S5. When the pressure in the hydraulic pipeline exceeds the rated pressure due to a fault, the relief valve opens to release the pressure in the hydraulic system. S6. The pressure reducing valve opens, and the high-pressure oil from the high-pressure accumulator passes through the pressure reducing valve, and the pressure of the high-pressure oil is reduced to the set value. S7. Oil enters the atmospheric pressure valve group and / or the high pressure valve group to form atmospheric pressure and / or high pressure; S8, the sensor group records in real time and converts the obtained digital signals into electrical signals, and transmits them to the electronic compartment of the intervention equipment.

9. The hydraulic control method for underwater lightweight intervention equipment according to claim 8, characterized in that, In S7, when the oil enters the atmospheric pressure valve assembly, the following steps are included: S11. After pressure reduction, the oil passes through the hydraulic control check valve and then merges into the shuttle valve. S12. The oil after passing through the shuttle valve is separated from one main oil circuit into two auxiliary oil circuits, and then injected into the corresponding atmospheric pressure valve group through the two auxiliary oil circuits. S13. The atmospheric pressure valve group injects the corresponding oil into the corresponding actuator according to the oil injection situation. The actuator opens and completes the control of the hydraulic control system of the underwater light intervention equipment.

10. The hydraulic control method for underwater lightweight intervention equipment according to claim 8, characterized in that, In S7, when the oil enters the high-pressure valve assembly, the following steps are included: S21, The pilot valve accumulator provides pilot fluid for the pilot-operated hydraulic valve; S22. When the pilot-operated hydraulic valve receives an opening command from the electronic compartment of the intervention equipment, the pilot-operated hydraulic valve is turned on, and the high-pressure oil circuit enters the preset actuator, causing the valve group in the preset actuator to open or close. S23. The high-pressure valve group injects the corresponding oil into the corresponding actuator according to the oil injection situation. The actuator opens and completes the control of the hydraulic control system of the underwater light intervention equipment.

Images