CN112799335B - System and method for testing safe reutilization of underwater Christmas tree - Google Patents

Abstract

The embodiment of the invention discloses a system and a method for testing safe reutilization of an underwater Christmas tree. The underwater Christmas tree comprises a hydraulic control valve, a hydraulic module and at least one electronic cabin; the hydraulic module comprises at least two first oil ports, the first oil ports are connected with the hydraulic control valve, and the electronic cabin is used for controlling whether the corresponding first oil ports are communicated with oil or not so as to control the working state of the hydraulic control valve; the test system comprises: the hydraulic testing unit comprises at least one second oil port; the second oil port is used for being correspondingly connected with the first oil port through at least two oil supply pipelines respectively so as to supply oil to the first oil port; and the main control unit is used for being connected with the electronic cabin respectively and controlling the working state of the electronic cabin respectively so as to control the working state of the hydraulic control valve. Through the technical scheme of the embodiment, the test system and the test method which can completely test the main application function and the performance of the underwater Christmas tree are realized, and the reutilization performance of the underwater Christmas tree is ensured.

Description

System and method for testing safe reutilization of underwater Christmas tree

Technical Field

The embodiment of the invention relates to the technical field of underwater production of marine oil and gas fields, in particular to a system and a method for testing safe reutilization of an underwater Christmas tree.

Background

Subsea trees are often used in subsea production of marine oil and gas fields for controlling and regulating the subsea production process. In order to respond to calls for environmental protection and resource saving, the underwater Christmas tree in service for years can be salvaged and recovered to be maintained and tested, and the reutilization is realized; the test part comprises main application functions and performance tests of the subsea Christmas tree, such as whether the functions of the electronic cabins are intact, whether the hydraulic control valves can be opened and whether the working state of the Christmas tree cavity is normal.

The existing test equipment can only test the single function of the underwater Christmas tree, if the main application function and performance test of the underwater Christmas tree are to be realized, the underwater Christmas tree needs to be disassembled to be taken to different test equipment in a manufacturing plant to realize different function tests, the difficulty is high, the workload is also high, and under the test condition, the underwater Christmas tree which is about to be released to the ocean to serve cannot be tested on the release site.

Disclosure of Invention

The embodiment of the invention provides a system and a method for testing safe recycling of an underwater Christmas tree, which can completely test the main application function and performance of the underwater Christmas tree and test the underwater Christmas tree on a release site, and ensure the recycling performance of the underwater Christmas tree.

In a first aspect, the embodiment of the invention provides a system for testing safe reutilization of an underwater Christmas tree; the underwater Christmas tree comprises a hydraulic control valve, a hydraulic module and at least one electronic cabin, wherein the hydraulic module comprises at least two first oil ports, and the first oil ports are connected with the hydraulic control valve; the electronic cabin is used for controlling whether the corresponding first oil port is communicated with oil or not so as to control the working state of the hydraulic control valve; the system comprises:

the hydraulic testing unit comprises at least one second oil port; the second oil port is used for being correspondingly connected with the first oil port through at least two oil supply pipelines respectively so as to supply oil to the first oil port;

and the main control unit is used for being connected with the electronic cabin respectively and controlling the working state of the electronic cabin so as to control the working state of the hydraulic control valve.

Optionally, the electronic compartment comprises a first electronic compartment and a second electronic compartment; the hydraulic module comprises four first oil ports; the first electronic cabin is used for respectively controlling the oil passing of the two first oil ports so as to control the opening or closing of the hydraulic control valve; the second electronic cabin is used for respectively controlling the oil passing of the other two first oil ports so as to control the opening or closing of the hydraulic control valve.

Optionally, the system further includes: the first acquisition unit is respectively connected with the hydraulic control valve and the main control unit; the first acquisition unit is used for acquiring a pressure signal and pressure supply time of the hydraulic control valve under the control of the main control unit; the main control unit is used for determining whether the hydraulic control valve is opened or not according to the pressure signal and the pressure supply time of the hydraulic control valve.

Optionally, the subsea tree further comprises a tree cavity; the system further comprises: and the water pressure testing unit is used for being connected with the Christmas tree cavity through a water supply pipeline so as to provide water pressure for the Christmas tree cavity.

Optionally, the system further includes: the second acquisition unit is respectively connected with the Christmas tree cavity and the water pressure test unit; the second acquisition unit is used for acquiring a pressure signal, a temperature signal and a flow signal of the Christmas tree cavity under the control of the water pressure test unit; the water pressure testing unit is used for determining the sealing performance of the Christmas tree cavity according to the pressure signal, the temperature signal and the flow signal of the Christmas tree cavity.

In a second aspect, an embodiment of the present invention further provides a method for testing safe reuse of a subsea tree, where the method is performed by the system for testing safe reuse of a subsea tree according to the first aspect, and the method includes:

the main control unit sends a control signal to the electronic cabin to control the working state of the electronic cabin;

and the electronic cabin controls whether the corresponding first oil port is communicated with oil or not according to the control signal sent by the main control unit so as to control the working state of the hydraulic control valve.

Optionally, the electronic compartment comprises a first electronic compartment and a second electronic compartment; the hydraulic module comprises four first oil ports; the electronic cabin controls whether the corresponding first oil port is communicated with oil or not according to the control signal sent by the main control unit so as to control the working state of the hydraulic control valve, and the working state of the hydraulic control valve comprises the following steps:

the first electronic cabin respectively controls the oil passing of the two first oil ports according to a control signal sent by the main control unit so as to control the opening or closing of the hydraulic control valve;

and the second electronic cabin controls the oil passing through the other two first oil ports according to the control signal sent by the main control unit so as to control the opening or closing of the hydraulic control valve.

Optionally, the system further includes a first acquisition unit, and the first acquisition unit is connected to the hydraulic control valve and the main control unit respectively; the method further comprises the following steps:

the main control unit controls the first acquisition unit to acquire the pressure signal and the pressure supply time of the hydraulic control valve;

and the main control unit determines whether the hydraulic control valve is opened or not according to the pressure signal and the pressure supply time of the hydraulic control valve.

Optionally, the subsea tree further comprises a tree cavity; the system also comprises a water pressure testing unit, wherein the water pressure testing unit is used for being connected with the Christmas tree cavity through a water supply pipeline; the method further comprises the following steps:

the water pressure testing unit provides water pressure for the Christmas tree cavity through a water supply pipeline.

Optionally, the system further comprises a second collecting unit, and the second collecting unit is respectively connected with the Christmas tree cavity and the water pressure testing unit; the method further comprises the following steps:

the water pressure testing unit controls the second acquisition unit to acquire a pressure signal, a temperature signal and a flow signal of the Christmas tree cavity;

and the water pressure testing unit determines the sealing property of the Christmas tree cavity according to the pressure signal, the temperature signal and the flow signal of the Christmas tree cavity.

The embodiment of the invention provides a system and a method for testing safe recycling of an underwater Christmas tree, wherein the underwater Christmas tree comprises a hydraulic control valve, a hydraulic module and at least one electronic cabin; the hydraulic module comprises at least two first oil ports, the first oil ports are connected with the hydraulic control valve, and the electronic cabin is used for controlling whether the corresponding first oil ports are communicated with oil or not so as to control the working state of the hydraulic control valve. The hydraulic testing unit and the main control unit are arranged; the hydraulic test unit comprises at least one second oil port, the second oil port is used for being correspondingly connected with the first oil port through at least two oil supply pipelines respectively so as to supply oil to the first oil port, the main control unit is used for being connected with the electronic cabin respectively and controlling the working state of the electronic cabin so as to control the working state of the hydraulic control valve, and therefore the test of whether the functions of the electronic cabins are intact and whether the hydraulic control valves can be opened is realized, namely the main application function and the performance of the underwater Christmas tree are completely tested, the operation is easy and simple to realize, the test system provided by the embodiment completely tests the main application function and the performance of the underwater Christmas tree, all units for testing are integrated together and are integrated into a whole machine, the test system has portability and can be conveniently carried to any place to test the underwater Christmas tree on site, convenient and practical, therefore, the test of the underwater Christmas tree on the putting site can be realized, and the reutilization performance of the underwater Christmas tree is ensured.

Drawings

FIG. 1 is a schematic structural diagram of a safety recycling test system for an underwater Christmas tree according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of another subsea tree safety reuse testing system provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of another subsea tree safety reuse testing system provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of another subsea tree safety reuse testing system provided by an embodiment of the present invention;

FIG. 5 is a flowchart of a method for testing safe reuse of an underwater Christmas tree according to an embodiment of the present invention;

fig. 6 is a test flow chart of a method for testing safe recycling of an underwater Christmas tree according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Fig. 1 is a schematic structural diagram of a safety recycling test system for an underwater christmas tree according to an embodiment of the present invention, and in order to more clearly illustrate a connection relationship between the test system and the underwater christmas tree during a test process, fig. 1 further illustrates a schematic structural diagram of the underwater christmas tree, so that a connection relationship between the test system 100 and the underwater christmas tree 200 during the test process is exemplarily illustrated in fig. 1. Referring to fig. 1, the subsea tree 200 includes a pilot operated valve 24, a hydraulic module 21, and at least one electronics pod 23; the hydraulic module 21 includes at least two first oil ports 22, the first oil ports 22 are connected to the hydraulic control valve 24, and the electronic module 23 is configured to control whether the corresponding first oil ports 22 are filled with oil, so as to control a working state of the hydraulic control valve 24. Referring to fig. 1, the subsea tree safe reuse testing system 100 includes: a hydraulic test unit 11 including at least one second oil port 12; the second oil port 12 is used for being correspondingly connected with the first oil port 22 through at least two oil supply pipelines 13 respectively so as to supply oil to the first oil port 22; and the main control unit 10 is used for being respectively connected with the electronic cabins 23 and respectively controlling the working states of the electronic cabins 23 so as to control the working states of the pilot-controlled valves 24.

In particular, subsea tree 200 typically includes tens of pilot operated valves 24. The hydraulic control valve 24 is a valve controlled by hydraulic pressure, and may include a hydraulic cylinder with a spring return, a hydraulic rod, and a gate valve connected to the hydraulic rod, and the hydraulic rod is displaced to open or close the hydraulic control valve 24, wherein the spring return pushes the hydraulic rod to close the hydraulic control valve 24 after the hydraulic cylinder loses pressure. Each pilot control valve 24 is used to perform different functions of the subsea tree 200, for example, the pilot control valve 24 may be a production main valve, a production wing valve, a chemical injection valve, a high pressure pilot control valve (which is opened or closed by introducing high pressure hydraulic oil) or a low pressure pilot control valve (which is opened or closed by introducing low pressure hydraulic oil), and the like, and in fig. 1, only one pilot control valve 24 is exemplarily illustrated.

The hydraulic module 21 may be an oil station of the subsea tree 200, and the external system supplies oil to the hydraulic module 21, and then the hydraulic module 21 supplies oil to the pilot operated valve 24 to control the operating state of the pilot operated valve 24. Accordingly, in the embodiment, the hydraulic module 21 includes the first oil port 22, the first oil port 22 is connected to the hydraulic control valve 24, and the external system supplies oil to the hydraulic control valve 24 through the first oil port 22 of the hydraulic module 21 to control the working state of the hydraulic control valve 24; when the first oil port 22 is filled with oil, the oil supplied by the external system 100 flows to the pilot control valve 24, so as to control the working state of the pilot control valve 24, for example, the pilot control valve 24 is controlled to be opened or closed, and when the first oil port 22 is not filled with oil, the oil supplied by the external system cannot flow to the pilot control valve 24, so that the working state of the pilot control valve 24 is not changed.

The operating state of the pilot control valve 24 includes an open state and a closed state, that is, the operating state of the pilot control valve 24 includes the pilot control valve 24 being opened or closed; and, the direction of the hydraulic pressure that controls the opening and closing of the pilot operated valve 24 is opposite. Accordingly, in the present embodiment, the hydraulic module 21 includes at least two first oil ports 22, one of the first oil ports 22 controls the hydraulic control valve 24 to open (i.e., provides a forward hydraulic pressure to the hydraulic control valve 24), and the other first oil port 22 controls the hydraulic control valve 24 to close (i.e., provides a reverse hydraulic pressure to the hydraulic control valve 24), that is, at least two corresponding first oil ports 22 are required to control the working state of one hydraulic control valve 24.

The electronic cabin 23 is used for realizing the general control function of the subsea tree 200, and can be understood as a general controller of the subsea tree 200. Subsea tree 200 may include one or more electronics pods 23, only one electronics pod 23 being schematically illustrated in fig. 1. When the underwater Christmas tree 200 comprises a plurality of electronic cabins 23, the electronic cabins 23 can be mutually redundant or not redundant, the redundancy can be redundancy in physical connection or redundancy in control logic, and the plurality of electronic cabins 23 are arranged to realize the master control function of the underwater Christmas tree 200 through the other electronic cabins 23 when one of the electronic cabins 23 fails, so that the reliable work of the underwater Christmas tree 200 is ensured. In this embodiment, the electronic compartment 23 is used to control whether the first port 22 is open or closed, that is, the first port 22 is controlled to be open or closed under the control of the electronic compartment 23, for example, by controlling a valve at the first port 22 to be opened or closed to control the first port 22 to be open or closed, and the valve may be a solenoid valve.

In this embodiment, the hydraulic pressure test unit 11 and the hydraulic module 21 may be connected by an oil supply line 13. Each first oil port 22 of the hydraulic module 21 corresponds to one oil supply pipeline 13, and each second oil port 12 of the hydraulic test unit 11 is used for supplying oil to the hydraulic module 21. The hydraulic test unit 11 may include one or more second oil ports 12; when the hydraulic test unit 11 includes one second oil port 12, the one second oil port 12 may be connected to the oil supply line 13 corresponding to each first oil port 22; when the hydraulic test unit 11 includes a plurality of second oil ports 12, the oil supply line 13, and the first oil ports 22 may be connected in a one-to-one correspondence; as exemplarily shown in fig. 1, the hydraulic test unit 11 includes two second oil ports 12, two oil supply lines 13, and two first oil ports 22, which are connected in a one-to-one correspondence. For example, the hydraulic test unit 11 may include a water pump, an engineering hose, and a switch, where the water pump is connected to a source of the water-based hydraulic oil and is connected to the second oil port 12, and the engineering hose is used to set the oil supply line 13; thus, when the switch of the hydraulic test unit 11 is turned on, the water pump starts to work, the water pump supplies oil to the second oil port 12, and then the water-based hydraulic oil can flow to the first oil port 22 through the oil supply pipeline 13; wherein, since the hydraulic test unit 11 is used for testing the subsea tree 200, the water pump is exemplarily connected to the water-based hydraulic oil. It can be seen that, in the subsea tree safe reuse testing system 100 of the present embodiment, the hydraulic testing unit 11 is configured to provide the first port 22 of the subsea tree 200 with water-based hydraulic oil, which can be used for testing the operating state of the pilot-controlled valve 24.

The main control unit 10 can be connected to the electronic cabin 23, that is, a communication line is established with the electronic cabin 23, so that the main control unit 10 can send a control signal to the electronic cabin 23 to control an operating state of the electronic cabin 23, and for example, the main control unit 10 may include an industrial personal computer and an operation terminal. The operation state of the electronic compartment 23 may include an active state, which may be understood as a state of responding to a control signal of the main control unit 10 and controlling whether the first port 22 is oil-filled, and a standby state, which may be understood as a standby state that is not used for a while. It can be seen that, in the subsea tree safety recycling test system 100 of the present embodiment, the main control unit 10 disposed therein can communicate with the electronic cabin 23 and control the working state of the electronic cabin 23, so that the function and performance of the electronic cabin 23 can be tested through the main control unit 10.

Based on the above, the main working process of the underwater Christmas tree safety recycling test system 100 provided by this embodiment may be:

the preparation process is started first: the main control unit 10 in the test system 100 is connected with the communication line between the electronic cabins 23 of the subsea tree 200, and after the connection, the main control unit 10 and the electronic cabins 23 can perform simple communication for several times to ensure good communication between the two; the second oil port 12 of the hydraulic test unit 11 in the test system 100 is connected with the first oil port 22 of the subsea tree 200 through the oil supply line 13. Secondly, the test process of the subsea tree 200 is performed: the main control unit 10 sends a control signal to the electronic cabin 23 to control the working state of the electronic cabin 23, that is, to control the electronic cabin 23 to be in an activated state or a standby state; opening a switch of the hydraulic test unit 11 to enable the second oil port 12 to be filled with oil (water-based hydraulic oil); the electronic cabin 23 sends a control signal to the first oil port 22 in response to the control signal sent by the main control unit 10 to control the first oil port 22 to be oil-communicated or not to be oil-communicated; when the first oil port 22 is filled with oil, the pilot operated valve 24 is opened or closed by the supplied hydraulic oil (water-based hydraulic oil); thereby, the function and performance of the electronic compartment 23 of the subsea tree 200 (i.e. whether it can respond to the control of the main control unit 10 and thus control the first port 22) and the working state of the pilot operated valve 24 (i.e. whether it is based on the opening or closing of the hydraulic test unit 11) are tested.

In summary, the safety recycling test system for the underwater Christmas tree provided by the embodiment is provided with the main control unit and the hydraulic test unit; the main control unit is used for being connected with the electronic cabin and controlling the working state of the electronic cabin, so that the function and performance of the electronic cabin of the underwater Christmas tree are tested, the hydraulic testing unit can provide hydraulic pressure (water-based hydraulic oil) to the first oil port of the underwater Christmas tree, and the hydraulic pressure can be used for testing the working state of the hydraulic control valve, so that the working state of the hydraulic control valve is tested, namely the main application function and performance of the underwater Christmas tree are tested completely, and the operation is simple, convenient and easy to realize. In addition, the underwater Christmas tree after maintenance can bring adverse effects to the underwater Christmas tree after maintenance again due to factors such as road jolt in the process of transportation to the launching site, and therefore the main control unit and the hydraulic test unit are integrated together, namely the test system is an integrated whole machine and has portability, and can be conveniently carried to any place to test the underwater Christmas tree on the spot.

Referring to fig. 1, optionally, the subsea tree 200 further includes a communication and power supply module 25, the master control unit 10 and the electronic cabin 23 can communicate with each other through the communication and power supply module 25, and a corresponding communication and power supply module can be further disposed in the master control unit 10.

Fig. 2 is a schematic structural diagram of another subsea tree safety recycling test system according to an embodiment of the present invention, and in order to more clearly illustrate a connection relationship between the test system and the subsea tree during a test process, fig. 2 further illustrates a schematic structural diagram of another subsea tree, so that a connection relationship between the test system 100 and the subsea tree 200 during a test process is exemplarily illustrated in fig. 2. Referring to fig. 2, optionally, the electronic compartment 23 of the subsea tree 200 includes a first electronic compartment 231 and a second electronic compartment 232, and the hydraulic module 21 includes four first ports 22; the first electronic compartment 231 is used for respectively controlling the oil passing through the two first oil ports 22 to control the opening or closing of the hydraulic control valve 24, and the second electronic compartment 232 is used for respectively controlling the oil passing through the other two first oil ports 22 to control the opening or closing of the hydraulic control valve 24.

Illustratively, for four first oil ports 22 (e.g., 22a, 22b, 22c and 22d in fig. 2), two of the first oil ports 22 are used for controlling the pilot control valve 24 to open when oil is flowing, such as the first oil port 22a and the first oil port 22b, and the other two first oil ports 22 are used for controlling the pilot control valve 24 to close when oil is flowing, such as the first oil port 22c and the first oil port 22 d; correspondingly, the first electronic compartment 231 is used for controlling the first oil port 22a and the first oil port 22c, and the second electronic compartment 232 is used for controlling the first oil port 22b and the first oil port 22 d; therefore, no matter the first electronic cabin 231 or the second electronic cabin 232 can control the opening or closing of the hydraulic control valve 24 through the two first oil ports 22, the connection between the first electronic cabin 231 and the two first oil ports 22 and the connection between the second electronic cabin 232 and the two first oil ports 22 are mutually redundant and are used for controlling the opening and closing of the hydraulic control valve 24, when the first electronic cabin 231 fails, the two first oil ports 22 connected with the first electronic cabin 231 cannot be controlled through the first electronic cabin 231 to control the opening and closing of the hydraulic control valve 24, at this time, the two first oil ports 22 connected with the second electronic cabin 232 can be controlled through the second electronic cabin 232 to control the opening and closing of the hydraulic control valve 24, and the reliable operation of the underwater Christmas tree 200 is ensured.

In this embodiment, the main control unit 10 can be connected to the first electronic compartment 231 and the second electronic compartment 232, that is, communication lines between the first electronic compartment 231 and the second electronic compartment 232 are respectively established, so that the main control unit 10 can send control signals to the first electronic compartment 231 and the second electronic compartment 232 to respectively control the working states of the first electronic compartment 231 and the second electronic compartment 232, and further, the first electronic compartment 231 and the second electronic compartment 232 respectively respond to the control signals sent by the main control unit 10 to control whether the two first oil ports 22 connected to each other are oil-filled, so as to control the hydraulic control valve 24 to open or close, thereby implementing the functions of the first electronic compartment 231 and the second electronic compartment 232 and the testing of the working states of the hydraulic control valve 24. Moreover, no matter how many electronic cabins 23 are arranged in the underwater Christmas tree 200, the arranged electronic cabins 23 can be respectively tested through the main control unit 10, and no matter how many first oil ports 22 and hydraulic control valves 24 are arranged in the underwater Christmas tree 200, oil can be respectively supplied to the first oil ports 22 through the hydraulic test module, so that the test of the working state of each hydraulic control valve 24 is realized.

In addition, in this embodiment, the main control unit 10 controls the first electronic compartment 231 to control the first oil port 22a to pass oil, then controls the first electronic compartment 231 to control the first oil port 22c to pass oil, or controls the second electronic compartment 232 to control the first oil port 22b to pass oil, and then controls the second electronic compartment 232 to control the first oil port 22d to pass oil.

Fig. 3 is a schematic structural diagram of another subsea tree safety recycling test system according to an embodiment of the present invention, and in order to more clearly illustrate a connection relationship between the test system and the subsea tree during a test process, fig. 3 further illustrates a schematic structural diagram of another subsea tree, so that a connection relationship between the test system 100 and the subsea tree 200 during a test process is exemplarily illustrated in fig. 3. Referring to fig. 3, optionally, the subsea tree safety recycling test system further includes: the first acquisition unit 14 is respectively connected with the hydraulic control valve 24 and the main control unit 10; the first acquisition unit 14 is used for acquiring a pressure signal and pressure supply time of the hydraulic control valve 24 under the control of the main control unit 10; the main control unit 10 is configured to determine whether the pilot control valve 24 is opened according to the pressure signal of the pilot control valve 24 and the pressure supply time.

Specifically, the first collecting unit 14 may be disposed on the pilot-controlled valve 24. Usually, an oil pump is disposed between the first oil port 22 and the hydraulic control valve 24, and the oil pump and the hydraulic control valve 24 are connected by a delivery pipe, and the first collecting unit 14 may also be disposed on the delivery pipe. The first acquisition unit 14 functions to acquire a supply time of the hydraulic pressure supplied to the hydraulic control valve 24 and acquire a real-time actual hydraulic pressure value, i.e., a pressure signal, of the hydraulic control valve 24. Illustratively, the first collecting unit 14 may be mainly composed of a sensor, a switch indicator, and the like.

The main control unit 10 may determine whether the pilot control valve 24 is opened according to the pressure signal and the pressure supply time of the pilot control valve 24, for this example, in a case that the hydraulic test unit 11 normally supplies oil to the second port 12, and the electronic cabin 23 controls the first port 22 to normally communicate oil under the control of the main control unit 10:

if the main control unit 10 monitors that the hydraulic pressure of the pilot control valve 24 does not reach the rated opening hydraulic value capable of opening the pilot control valve 24 according to the pressure signal of the pilot control valve 24, it is determined that the pilot control valve 24 is not opened, and the pilot control valve 24 is failed, or if the main control unit 10 monitors that the hydraulic pressure of the pilot control valve 24 does not reach the rated closing hydraulic value capable of closing the pilot control valve 24 according to the pressure signal of the pilot control valve 24, it is determined that the pilot control valve 24 is not closed, and the pilot control valve 24 is failed.

Alternatively, the main control unit 10 determines that the pilot control valve 24 is out of order if the difference between the hydraulic pressure for opening the pilot control valve 24 and the rated opening hydraulic pressure is too large (for example, the difference exceeds a preset opening difference) according to the pressure signal of the pilot control valve 24, or the main control unit 10 determines that the pilot control valve 24 is out of order if the difference between the hydraulic pressure for closing the pilot control valve 24 and the rated closing hydraulic pressure is too large (for example, the difference exceeds a preset closing difference) according to the pressure signal of the pilot control valve 24.

Or further, if the main control unit 10 monitors that the hydraulic pressure of the pilot control valve 24 does not reach the rated opening hydraulic pressure value within a certain pressure supply time (for example, within a preset opening pressure supply time) according to the pressure signal of the pilot control valve 24 and the pressure supply time, it is determined that the pilot control valve 24 is not opened, and the pilot control valve 24 is failed, or the main control unit 10 monitors that the hydraulic pressure of the pilot control valve 24 does not reach the rated closing hydraulic pressure value within a certain pressure supply time (for example, within a preset opening pilot closing pressure supply time) according to the pressure signal of the pilot control valve 24, and it is determined that the pilot control valve 24 is not closed, and the pilot control valve 24 is failed. The rated opening hydraulic pressure value is, for example, about 20MPa, and the preset opening pressure supply time or the preset closing pressure supply time is, for example, 30 seconds to 40 seconds.

In summary, the safety recycling test system for the subsea tree provided by the embodiment can test the performance of the hydraulic control valve of the subsea tree. In addition, a sensor and other acquisition equipment can be arranged at the first oil port to acquire a pressure signal at the first oil port and the oil passing time or the oil non-passing time of the first oil port and transmit the acquired data to the main control unit, the main control unit can determine whether the electronic cabin has faults according to the control of the electronic cabin and the data, for example, the electronic cabin cannot respond to the control signal of the main control unit to control whether the first oil port passes the oil or not, or the electronic cabin cannot respond to the control signal of the main control unit timely and accurately to enable the oil passing time of the first oil port to be overlong or too short, and determine whether the first oil port has faults, for example, a valve at the first oil port cannot respond to the control of the electronic cabin, or a valve at the first oil port cannot respond to the control of the electronic cabin timely and accurately to enable the oil passing time of the first oil port to be overlong or too short, it can be seen that the safety recycling test system for the subsea tree provided by this embodiment can test the performance of the electronic cabin of the subsea tree and the first oil port of the hydraulic module. Furthermore, a sensor and other acquisition equipment can be arranged on the oil supply pipeline to acquire pressure signals on the oil supply pipeline and the oil passing or non-oil passing time in the oil supply pipeline, and transmits the collected data to the main control unit, the main control unit can judge whether the oil supply pipeline has faults or not according to the data, for example, the pressure signal in the oil supply line is greatly changed due to the failure of the first oil port or the second oil port, it can be seen that the safety recycling test system for the subsea tree provided by this embodiment can confirm the fault location of the subsea tree, after the safe recycling test system for the subsea tree provided by the embodiment confirms the fault position of the subsea tree, the repaired subsea tree can be repaired again before being put into service in the ocean, and the test and the repair are repeated, so as to ensure the reliable and safe reusability of the underwater Christmas tree when the underwater Christmas tree is put into service in the ocean.

Fig. 4 is a schematic structural diagram of another subsea tree safety recycling test system according to an embodiment of the present invention, and in order to more clearly illustrate a connection relationship between the test system and the subsea tree during a test process, fig. 4 further illustrates a schematic structural diagram of another subsea tree, so that a connection relationship between the test system 100 and the subsea tree 200 during a test process is exemplarily illustrated in fig. 4. Referring to fig. 4, optionally, subsea tree 200 further comprises a tree cavity 26; the safety recycling test system for the underwater Christmas tree further comprises: and the water pressure testing unit 15 is used for being connected with the Christmas tree cavity 26 through a water supply pipeline, so as to provide water pressure for the Christmas tree cavity 26.

Specifically, the pressure of oil, natural gas, etc. actually produced in the christmas tree cavity 26 by the subsea christmas tree 200 can be simulated by injecting water pressure, air pressure, etc. into the christmas tree cavity 26 (i.e. the christmas tree cavity) to test the sealing performance of the christmas tree cavity 26, so as to avoid the occurrence of oil leakage and air leakage in the christmas tree cavity 26. That is, the subsea tree safe recycling test system 100 provided in this embodiment can also test the sealing performance of the christmas tree cavity 26 by providing water pressure to the christmas tree cavity 26.

For example, the water pressure testing unit 15 may include a water pump, a hose and a switch, wherein the water pump is connected to clean tap water, and the hose is used for arranging a water supply pipeline; like this, open the switch of water pressure test unit 15, the water pump begins work, and the water pump supplies water to christmas tree cavity 26 through the water supply pipe, provides the water pressure of certain pressure to christmas tree cavity 26 promptly, and then, water pressure test unit 15 accessible real-time supervision christmas tree cavity 26's internal parameter tests the leakproofness of christmas tree cavity 26.

With continued reference to fig. 4, optionally, the subsea tree safety reuse testing system 100 further comprises: the second acquisition unit 16 is respectively connected with the Christmas tree cavity 26 and the water pressure test unit 15; the second acquisition unit 16 is used for acquiring a pressure signal, a temperature signal and a flow signal of the Christmas tree cavity 26 under the control of the water pressure test unit 15; the hydraulic pressure test unit 15 is used for determining the tightness of the Christmas tree cavity 26 according to the pressure signal, the temperature signal and the flow signal of the Christmas tree cavity 26.

Specifically, the second collection unit 16 may be disposed at a certain position of the christmas tree cavity 26, for example, inside or on an outer wall of the christmas tree cavity 26, as long as the pressure signal, the temperature signal and the flow signal of the christmas tree cavity 26 can be collected, and for example, the second collection unit 16 may be mainly composed of a sensor and the like. The pressure signal of the Christmas tree cavity 26 can be understood as a pressure value signal of the pressure in the Christmas tree cavity 26, the temperature signal of the Christmas tree cavity 26 can be understood as a temperature value signal of the temperature in the Christmas tree cavity 26, and the flow signal of the Christmas tree cavity 26 can be understood as a flow value temperature signal of the flow of the hydraulic oil when the hydraulic oil of the Christmas tree cavity 26 is input or output.

The hydraulic test unit 15 may determine the tightness of the christmas tree cavity 26 based on the pressure signal, the temperature signal, and the flow signal of the christmas tree cavity 26. Illustratively, a water pressure of a preset pressure is provided to the christmas tree cavity 26 through the water pressure testing unit 15, the water pressure testing unit 15 records a current pressure signal, a current temperature signal and a current flow signal of the christmas tree cavity 26, after a preset time (i.e. after the pressure of the christmas tree cavity 26 is maintained under the preset pressure for a preset time), the water pressure testing unit 15 obtains the pressure signal, the current temperature signal and the current flow signal of the christmas tree cavity 26 again, and the water pressure testing unit 15 judges the sealing performance of the christmas tree cavity 26 by comparing the pressure signal, the temperature signal and the current flow signal of the christmas tree cavity 26 before and after the pressure maintaining, for example, the difference between the pressure signal before and after the pressure maintaining of the christmas tree cavity 26 is obtained through comparison is too large, and the difference is equal to or greater than a pressure threshold value, the sealing performance of the christmas tree cavity 26 is judged to be poor, or the difference between the temperature signal before and, if the difference is equal to or greater than the temperature threshold, it is determined that the sealing performance of the Christmas tree cavity 26 is poor. Wherein the predetermined pressure is, for example, 100MPa to 105 MPa. In addition, the second collection unit 16 can also collect the ambient temperature of the Christmas tree cavity 26, and the ambient temperature of the Christmas tree cavity 26 can also represent the temperature in the Christmas tree cavity 26.

With continued reference to fig. 4, optionally, the subsea tree safety reuse testing system 100 further comprises: the air pressure test unit 17, the air pressure test unit 17 is used for being connected with the christmas tree cavity 26 through the gas supply line to provide atmospheric pressure to the christmas tree cavity 26, and the test system 100 is recycled to subsea christmas tree safety that this embodiment provided can also be through providing atmospheric pressure to the christmas tree cavity 26, in order to test the leakproofness of christmas tree cavity 26.

For example, the gas pressure test unit 17 may include a gas generation unit for supplying a gas, such as nitrogen, into the gas supply duct, a hose for installing the gas supply duct, and a switch; thus, when the switch of the air pressure testing unit 17 is turned on, the gas generating unit starts to supply gas to the Christmas tree cavity 26 through the gas supply pipeline, namely, the air pressure with certain pressure is provided for the Christmas tree cavity 26, and then the air pressure testing unit 17 can monitor the cavity internal parameters of the Christmas tree cavity 26 in real time to test the sealing performance of the Christmas tree cavity 26.

Illustratively, the air pressure testing unit 17 provides air pressure with a preset pressure to the christmas tree cavity 26, the air pressure testing unit 17 records a current pressure signal, a current temperature signal and a current flow signal of the christmas tree cavity 26 by using the second acquisition unit 16, after a preset time (i.e. after the pressure of the christmas tree cavity 26 is maintained at the preset pressure for the preset time), the air pressure testing unit 17 obtains the pressure signal, the current temperature signal and the current flow signal of the christmas tree cavity 26 by using the second acquisition unit 16 again, and the air pressure testing unit 17 judges the sealing performance of the christmas tree cavity 26 by comparing the pressure signal, the temperature signal and the flow signal before and after the pressure maintaining of the christmas tree cavity 26, for example, the difference between the pressure signal before and after the pressure maintaining of the christmas tree cavity 26 is obtained by comparison is too large, and the difference is equal to or greater than the pressure threshold value, so as to judge that the sealing, or the temperature signals obtained by comparison before and after the pressure maintaining of the Christmas tree cavity 26 have overlarge difference, and the difference is equal to or greater than the temperature threshold, then the poor sealing property of the Christmas tree cavity 26 is judged.

With continued reference to fig. 4, optionally, subsea tree 200 may include subsea control module 20, wherein electronics pod 23, hydraulic module 21, and communication and power module 25 of subsea tree 200 may all be disposed in subsea control module 20. The subsea control module 20 of the subsea tree 200 is an electro-hydraulic compound control module, wherein hydraulic input and output are controlled by solenoid valves, which are controlled by the electronic pods 23, while in this embodiment, each electronic pod 23 of the subsea tree 200 can be tested by the master control unit 10.

With continued reference to fig. 4, optionally, the subsea tree safety reuse testing system 100 further comprises: switch board 18, switch board 18 can be connected with control module 20 under water, and switch board 18 is used for supplying power to electron cabin 23 through control module 20 under water, promptly before testing production tree 200 under water, can start switch board 18 earlier and go up the electricity to electron cabin 23. Illustratively, the power distribution cabinet 18 may power the electronic compartment 23 via the communication and power module 25 in the subsea control module 20.

In summary, the safety recycling test system for the underwater Christmas tree provided by the embodiment of the present invention realizes the test of whether each electronic cabin function and each hydraulic control valve of the underwater Christmas tree can be opened or not by arranging the main control unit, the hydraulic test unit and the first acquisition unit, and realizes the test of the sealing property of the Christmas tree cavity by arranging the hydraulic test unit, the pneumatic test unit and the second acquisition unit, namely, the complete test of the main application function and performance of the underwater Christmas tree is realized, thereby avoiding disassembling the underwater Christmas tree to be taken to different test equipment in a manufacturing plant to realize different function tests, and the operation is simple and easy to realize; in addition, according to the safety recycling test system for the underwater Christmas tree provided by the embodiment of the invention, the main control unit, the hydraulic test unit, the water pressure test unit, the air pressure test unit and the power distribution cabinet are integrated into a whole machine, and the whole machine can be conveniently carried to any place to test the underwater Christmas tree on the spot. Finally, with continued reference to fig. 4, the main control unit, the hydraulic pressure testing unit, the water pressure testing unit, the air pressure testing unit and the power distribution cabinet may be disposed in the cabinet, and the cabinet may be disposed with a total hydraulic pressure, water pressure and air pressure testing platform 101, and the hydraulic pressure testing unit, the water pressure testing unit and the air pressure testing unit may be disposed in the hydraulic pressure, water pressure and air pressure testing platform 101.

An embodiment of the present invention further provides a method for testing safe recycling of an underwater christmas tree, where the method is executed by the system 100 for testing safe recycling of an underwater christmas tree according to any of the above technical solutions, fig. 5 is a flowchart of the method for testing safe recycling of an underwater christmas tree according to an embodiment of the present invention, and with reference to fig. 5, the method includes:

and S10, the main control unit sends a control signal to the electronic cabin to control the working state of the electronic cabin.

Specifically, the preparation process may begin first, as can be seen in fig. 1: the main control unit 10 in the test system 100 is connected with the communication line between the electronic cabins 23 of the subsea tree 200, and after the connection, the main control unit 10 and the electronic cabins 23 can perform simple communication for several times to ensure good communication between the two; the second oil port 12 of the hydraulic test unit 11 in the test system 100 is connected with the first oil port 22 of the subsea tree 200 through the oil supply line 13. Secondly, the test process of the subsea tree 200 is performed:

the main control unit 10 sends a control signal to the electronic cabin 23 to control the working state of the electronic cabin 23, that is, to control the electronic cabin 23 to be in an activated state or a standby state; here, the active state may be understood as a state in response to a control signal of the main control unit 10, and the standby state may be understood as a standby state which is not used for the moment.

And S11, controlling whether the corresponding first oil port is communicated with oil or not by the electronic cabin according to the control signal sent by the main control unit so as to control the working state of the hydraulic control valve.

Specifically, referring to fig. 1, the switch of the hydraulic test unit 11 is opened to allow the second port 12 to be filled with oil (water-based hydraulic oil).

The electronic cabin 23 sends a control signal to the first oil port 22 in response to the control signal sent by the main control unit 10 to control the first oil port 22 to be oil-communicated or not to be oil-communicated; when the first oil port 22 is filled with oil, the pilot operated valve 24 is opened or closed by the supplied hydraulic oil (water-based hydraulic oil); thereby, the function and performance of the electronic compartment 23 of the subsea tree 200 (i.e. whether it can respond to the control of the main control unit 10 and thus control the first port 22) and the working state of the pilot operated valve 24 (i.e. whether it is based on the opening or closing of the hydraulic test unit 11) are tested.

The method for testing safe recycling of the underwater Christmas tree provided by the embodiment of the invention and the system for testing safe recycling of the underwater Christmas tree in any technical scheme belong to the same invention concept and can realize the same technical effect, and repeated contents are not repeated here.

Optionally, the electronic cabin of the subsea tree includes a first electronic cabin and a second electronic cabin, and the hydraulic module 21 includes four first oil ports. Step S11, the electronic cabin controls whether the corresponding first oil port is filled with oil according to the control signal sent by the main control unit to control the working state of the hydraulic control valve, including:

and S110, the first electronic cabin respectively controls the oil through of the two first oil ports according to the control signal sent by the main control unit so as to control the opening or closing of the hydraulic control valve.

For example, in conjunction with fig. 2, the first electronic compartment 231 controls the first oil port 22a to open oil according to the control signal sent by the main control unit 10, so as to control the pilot-controlled valve 24 to open; furthermore, the first electronic compartment 231 controls the first oil port 22c to communicate oil according to the control signal sent by the main control unit 10, so as to control the hydraulic control valve 24 to close; next, the main control unit 10 may switch from the first electronic compartment 231 to the second electronic compartment 232 for testing, that is, the main control unit 10 starts to control the second electronic compartment 232, and then the process goes to step S111.

And S111, controlling the oil through the other two first oil ports by the second electronic cabin according to the control signal sent by the main control unit so as to control the opening or closing of the hydraulic control valve.

For example, in conjunction with fig. 2, the second electronic compartment 232 controls the first oil port 22b to open oil according to the control signal sent by the main control unit 10, so as to control the pilot-controlled valve 24 to open; further, the second electronic compartment 232 controls the first oil port 22d to communicate oil according to the control signal sent by the main control unit 10, so as to control the hydraulic control valve 24 to close.

Optionally, the system for testing safe recycling of the underwater Christmas tree further comprises a first acquisition unit, and the first acquisition unit is respectively connected with the hydraulic control valve and the main control unit; the method further comprises the following steps:

and S20, the main control unit controls the first acquisition unit to acquire the pressure signal and the pressure supply time of the hydraulic control valve.

And S21, the main control unit determines whether the pilot control valve is opened according to the pressure signal and the pressure supply time of the pilot control valve.

Specifically, the steps S20 and S21 may be performed during or after the electronic compartment 23 controls the first oil port 22 to open or close the pilot operated valve 24. With reference to fig. 6 in combination with fig. 2 and fig. 3, and step S110 and step S111, fig. 6 is a test flow chart of a method for testing safe recycling of a subsea tree according to an embodiment of the present invention, which is as follows:

and S01, controlling the first oil port to pass oil according to the control signal sent by the main control unit by the first electronic cabin so as to control the hydraulic control valve to open. (e.g., control the first port 22a to pass oil).

S02, the main control unit controls the first acquisition unit to acquire the pressure signal and the pressure supply time of the hydraulic control valve; and the main control unit determines whether the hydraulic control valve is opened or not according to the pressure signal and the pressure supply time of the hydraulic control valve.

And S03, controlling the first oil port to pass oil according to the control signal sent by the main control unit by the first electronic cabin so as to control the hydraulic control valve to be closed. (e.g., control the first port 22c to communicate oil).

S04, the main control unit controls the first acquisition unit to acquire the pressure signal and the pressure supply time of the hydraulic control valve; and the main control unit determines whether the hydraulic control valve is closed or not according to the pressure signal and the pressure supply time of the hydraulic control valve.

S05, the master control unit controls switching from the first electronic compartment to the second electronic compartment.

And S06, controlling the first oil port to pass oil according to the control signal sent by the main control unit by the second electronic cabin so as to control the hydraulic control valve to open. (e.g., control the first port 22b to communicate oil).

S07, the main control unit controls the first acquisition unit to acquire the pressure signal and the pressure supply time of the hydraulic control valve; and the main control unit determines whether the hydraulic control valve is opened or not according to the pressure signal and the pressure supply time of the hydraulic control valve.

And S08, controlling the first oil port to pass oil according to the control signal sent by the main control unit by the second electronic cabin so as to control the hydraulic control valve to be closed. (e.g., control the first port 22d to communicate oil).

S09, the main control unit controls the first acquisition unit to acquire the pressure signal and the pressure supply time of the hydraulic control valve; and the main control unit determines whether the hydraulic control valve is closed or not according to the pressure signal and the pressure supply time of the hydraulic control valve.

Optionally, the subsea tree further comprises a tree cavity; the test system for safely recycling the underwater Christmas tree further comprises a water pressure test unit, and the water pressure test unit is used for being connected with the Christmas tree cavity through a water supply pipeline. The method further comprises the following steps:

and S30, the water pressure testing unit supplies water pressure to the Christmas tree cavity through a water supply pipeline.

Specifically, with reference to fig. 4 and 5, in order to test the functions of the electronic cabin 23 and the working state of the pilot operated valve 24 under the two conditions of pressure and no pressure in the christmas tree cavity 26, it may be: when it is determined that there is no pressure in the Christmas tree cavity 26, the steps S10 and S11 are sequentially performed, and then the step S30 is performed to supply water pressure to the interior of the Christmas tree cavity 26 (here, air pressure may also be supplied to the interior of the Christmas tree cavity 26 by an air pressure test stand), so that the steps S10 and S11 are sequentially performed when there is pressure in the interior of the Christmas tree cavity 26.

Optionally, the test system for safely recycling the underwater Christmas tree further comprises a second acquisition unit, and the second acquisition unit is respectively connected with the Christmas tree cavity and the water pressure test unit; the method further comprises the following steps:

and S40, the water pressure testing unit controls the second acquisition unit to acquire the pressure signal, the temperature signal and the flow signal of the Christmas tree cavity.

And S41, the water pressure testing unit determines the sealing performance of the Christmas tree cavity according to the pressure signal, the temperature signal and the flow signal of the Christmas tree cavity.

Specifically, the steps S40 and S41 may be performed during or after the electronic cabin 23 controls the first oil port 22 to open or close the pilot operated valve 24 based on the pressure in the christmas tree cavity 26. With reference to the drawings of the specification and the above steps, in an exemplary manner, the flow of the method for testing safe recycling of the subsea tree according to the embodiment further includes:

and S001, controlling the first oil port to pass through oil by the first electronic cabin according to a control signal sent by the main control unit so as to control the hydraulic control valve to open. (e.g., control the first port 22a to pass oil).

S002, the main control unit controls the first acquisition unit to acquire the pressure signal and the pressure supply time of the hydraulic control valve; and the main control unit determines whether the hydraulic control valve is opened or not according to the pressure signal and the pressure supply time of the hydraulic control valve.

And S003, controlling the first oil port to feed oil according to the control signal sent by the main control unit by the first electronic cabin so as to control the hydraulic control valve to be closed. (e.g., control the first port 22c to communicate oil).

S004, the main control unit controls the first acquisition unit to acquire pressure signals and pressure supply time of the hydraulic control valve; and the main control unit determines whether the hydraulic control valve is closed or not according to the pressure signal and the pressure supply time of the hydraulic control valve.

And S005, the main control unit controls the switching from the first electronic cabin to the second electronic cabin.

And S006, controlling the first oil port to pass oil by the second electronic cabin according to a control signal sent by the main control unit so as to control the opening of the hydraulic control valve. (e.g., control the first port 22b to communicate oil).

S007, controlling the first acquisition unit to acquire a pressure signal and pressure supply time of the hydraulic control valve by the main control unit; and the main control unit determines whether the hydraulic control valve is opened or not according to the pressure signal and the pressure supply time of the hydraulic control valve.

And S008, controlling the first oil port to pass through oil by the second electronic cabin according to a control signal sent by the main control unit so as to control the hydraulic control valve to be closed. (e.g., control the first port 22d to communicate oil).

S009, the main control unit controls the first acquisition unit to acquire pressure signals and pressure supply time of the hydraulic control valve; and the main control unit determines whether the hydraulic control valve is closed or not according to the pressure signal and the pressure supply time of the hydraulic control valve.

S0010, the water pressure testing unit provides water pressure for the Christmas tree cavity through a water supply pipeline.

And S0011, controlling the first oil port to communicate oil by the second electronic cabin according to a control signal sent by the main control unit so as to control the hydraulic control valve to be opened. (e.g., control the first port 22b to communicate oil).

S0012, the main control unit controls the first acquisition unit to acquire a pressure signal and pressure supply time of the hydraulic control valve; and the main control unit determines whether the hydraulic control valve is opened or not according to the pressure signal and the pressure supply time of the hydraulic control valve.

S0013, the water pressure testing unit controls the second collecting unit to collect pressure signals, temperature signals and flow signals of the Christmas tree cavity.

S0014, the water pressure testing unit determines the sealing performance of the Christmas tree cavity according to the pressure signal, the temperature signal and the flow signal of the Christmas tree cavity.

And S0015, the second electronic cabin controls the first oil port to communicate oil according to the control signal sent by the main control unit so as to control the hydraulic control valve to be closed. (e.g., control the first port 22d to communicate oil).

S0016, the main control unit controls the first acquisition unit to acquire a pressure signal and pressure supply time of the hydraulic control valve; and the main control unit determines whether the hydraulic control valve is closed or not according to the pressure signal and the pressure supply time of the hydraulic control valve.

S0017, the water pressure testing unit controls the second collecting unit to collect pressure signals, temperature signals and flow signals of the Christmas tree cavity.

S0018, the water pressure testing unit determines the sealing performance of the Christmas tree cavity according to the pressure signal, the temperature signal and the flow signal of the Christmas tree cavity.

And S0019, the main control unit controls the second electronic cabin to be switched to the first electronic cabin.

S0020, controlling the first oil port to pass through oil according to a control signal sent by the main control unit by the first electronic cabin so as to control the hydraulic control valve to open. (e.g., control the first port 22a to pass oil).

S0021, controlling a first acquisition unit to acquire a pressure signal and pressure supply time of a hydraulic control valve by a main control unit; and the main control unit determines whether the hydraulic control valve is opened or not according to the pressure signal and the pressure supply time of the hydraulic control valve.

S0022, the water pressure testing unit controls the second collecting unit to collect pressure signals, temperature signals and flow signals of the Christmas tree cavity.

S0023, the water pressure testing unit determines the sealing performance of the Christmas tree cavity according to the pressure signal, the temperature signal and the flow signal of the Christmas tree cavity.

S0024, controlling the first oil port to be communicated with oil according to the control signal sent by the main control unit by the first electronic cabin so as to control the hydraulic control valve to be closed. (e.g., control the first port 22c to communicate oil).

S0025, controlling the first acquisition unit to acquire a pressure signal and pressure supply time of the hydraulic control valve by the main control unit; and the main control unit determines whether the hydraulic control valve is closed or not according to the pressure signal and the pressure supply time of the hydraulic control valve.

S0026, controlling the second acquisition unit to acquire a pressure signal, a temperature signal and a flow signal of the Christmas tree cavity by the water pressure test unit.

S0027, the water pressure testing unit determines the sealing performance of the Christmas tree cavity according to the pressure signal, the temperature signal and the flow signal of the Christmas tree cavity.

In the above test procedure, for example, the pressure provided by the hydraulic test unit to the christmas tree cavity may be 1.5 times of the rated working pressure of the christmas tree (or the air pressure provided by the air pressure test unit to the christmas tree cavity may be 1.5 times of the rated working pressure of the christmas tree), the tightness of the christmas tree cavity is also tested for many times, and in step S0010, the hydraulic test unit may be temporarily depressurized by temporarily closing a switch of the hydraulic test unit. In addition, the above-mentioned test procedure is only an exemplary test sequence for the electronic cabin and the hydraulic control valve (and the first oil port), and is only based on the principle of improving the test efficiency as much as possible.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (9)

1. The system for testing the safe recycling of the underwater Christmas tree is characterized by comprising a hydraulic control valve, a hydraulic module and at least one electronic cabin, wherein the hydraulic module comprises at least two first oil ports which are connected with the hydraulic control valve; the electronic cabin is used for controlling whether the corresponding first oil port is communicated with oil or not so as to control the working state of the hydraulic control valve; the system comprises:

the hydraulic testing unit comprises at least one second oil port; the second oil port is used for being correspondingly connected with the first oil port through at least two oil supply pipelines respectively so as to supply oil to the first oil port;

the main control unit is used for being connected with the electronic cabin respectively and controlling the working state of the electronic cabin so as to test the function and performance of the electronic cabin and control the working state of the hydraulic control valve;

the underwater Christmas tree also comprises a Christmas tree cavity; the system further comprises: and the water pressure testing unit is used for being connected with the Christmas tree cavity through a water supply pipeline so as to provide water pressure for the Christmas tree cavity and test the sealing property of the Christmas tree cavity.

2. The subsea tree safe reuse testing system according to claim 1,

the electronic compartment comprises a first electronic compartment and a second electronic compartment;

the hydraulic module comprises four first oil ports; the first electronic cabin is used for respectively controlling the oil passing of the two first oil ports so as to control the opening or closing of the hydraulic control valve; the second electronic cabin is used for respectively controlling the oil passing of the other two first oil ports so as to control the opening or closing of the hydraulic control valve.

3. The subsea tree safety reuse testing system according to claim 1, further comprising:

the first acquisition unit is respectively connected with the hydraulic control valve and the main control unit; the first acquisition unit is used for acquiring a pressure signal and pressure supply time of the hydraulic control valve under the control of the main control unit; the main control unit is used for determining whether the hydraulic control valve is opened or not according to the pressure signal and the pressure supply time of the hydraulic control valve.

4. The subsea tree safety reuse testing system according to claim 1, further comprising:

the second acquisition unit is respectively connected with the Christmas tree cavity and the water pressure test unit; the second acquisition unit is used for acquiring a pressure signal, a temperature signal and a flow signal of the Christmas tree cavity under the control of the water pressure test unit; the water pressure testing unit is used for determining the sealing performance of the Christmas tree cavity according to the pressure signal, the temperature signal and the flow signal of the Christmas tree cavity.

5. A method for testing safe reuse of an underwater christmas tree, performed by the system for testing safe reuse of an underwater christmas tree according to any one of claims 1-4, the method comprising:

the main control unit sends a control signal to the electronic cabin to control the working state of the electronic cabin;

and the electronic cabin controls whether the corresponding first oil port is communicated with oil or not according to the control signal sent by the main control unit so as to control the working state of the hydraulic control valve.

6. The method for testing safe reuse of subsea trees according to claim 5,

the electronic compartment comprises a first electronic compartment and a second electronic compartment; the hydraulic module comprises four first oil ports;

the electronic cabin controls whether the corresponding first oil port is communicated with oil or not according to the control signal sent by the main control unit so as to control the working state of the hydraulic control valve, and the working state of the hydraulic control valve comprises the following steps:

the first electronic cabin respectively controls the oil passing of the two first oil ports according to a control signal sent by the main control unit so as to control the opening or closing of the hydraulic control valve;

and the second electronic cabin controls the oil passing through the other two first oil ports according to the control signal sent by the main control unit so as to control the opening or closing of the hydraulic control valve.

7. The method for testing safe reuse of an underwater Christmas tree according to claim 5, wherein the system further comprises a first acquisition unit, and the first acquisition unit is respectively connected with the hydraulic control valve and the main control unit; the method further comprises the following steps:

the main control unit controls the first acquisition unit to acquire the pressure signal and the pressure supply time of the hydraulic control valve;

and the main control unit determines whether the hydraulic control valve is opened or not according to the pressure signal and the pressure supply time of the hydraulic control valve.

8. The method for testing safe reuse of subsea trees of claim 7, wherein said subsea tree further comprises a tree cavity; the system also comprises a water pressure testing unit, wherein the water pressure testing unit is used for being connected with the Christmas tree cavity through a water supply pipeline; the method further comprises the following steps:

the water pressure testing unit provides water pressure for the Christmas tree cavity through a water supply pipeline.

9. The method for testing safe reuse of subsea trees of claim 8, wherein said system further comprises a second collection unit, said second collection unit being connected to said tree cavity and said hydraulic test unit, respectively; the method further comprises the following steps:

the water pressure testing unit controls the second acquisition unit to acquire a pressure signal, a temperature signal and a flow signal of the Christmas tree cavity;

and the water pressure testing unit determines the sealing property of the Christmas tree cavity according to the pressure signal, the temperature signal and the flow signal of the Christmas tree cavity.

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