An underwater routing unit for an underwater integrated control station

Abstract

The application discloses an underwater routing unit for an underwater integrated control station, which is arranged in a shallow sea area and comprises a sealed third cubic pressure-bearing shell, the third cubic pressure-bearing shell bears a pressure of not more than 200 meters of water depth, and no water depth compensator is arranged in the third cubic pressure-bearing shell; no anode protection block is arranged on the third cubic pressure-bearing shell; the third cubic pressure-bearing shell is provided with electrical elements required for collecting pressure, temperature and flow parameters of underwater equipment; the electrical elements are normal-pressure electrical elements; the top surface of the third cubic pressure-bearing shell comprises an electrical connector and an optical fiber connector; and the underwater routing unit realizes underwater power distribution, optical fiber communication, photoelectric signal conversion and power communication through the electrical connector and the optical fiber connector on the top surface. The underwater routing unit has the advantages of simple structure and low overall cost.

Description

Technical Field

[0001] This application relates to the field of subsea oil production technology, and in particular to an underwater routing unit for an underwater integrated control station. Background Technology

[0002] Subsea production systems, essential for offshore oil and gas operations, generally consist of two parts: the upper control system, located on the upper platform or land terminal, which primarily includes a main control station, power and communication units, and hydraulic power units. The upper system provides power and hydraulic power to the entire underwater control system and is responsible for the operational control logic and data acquisition for the entire oil and gas field. The underwater system mainly includes a subsea control module (SCM), a subsea wellhead (equipment for controlling and regulating well production), manifolds (a combination of multiple underwater pipes), and other underwater facilities such as sensors and valves. The upper and underwater subsystems of the entire control system are connected via umbilical cables, integrating the entire system to achieve control, monitoring, and data acquisition of the entire subsea production system, ensuring the safety of the subsea oil and gas field.

[0003] The underwater routing module is used to provide power and communication integration for underwater equipment.

[0004] However, existing underwater routing modules (SRMs) have the following drawbacks: 1. Large size, taking up a lot of space for installation; 2. Traditional SRM is a design that balances internal and external pressures, which places high demands on the selection of internal electronic components and requires the equipment to withstand water pressure, resulting in high costs. 3. The equipment has a complex structure, making it inconvenient to assemble and maintain; 4. It only has power distribution and communication functions, but no data acquisition function.

[0005] 5. Its operation depends entirely on the normal operation of the underwater control module (SCM). When the underwater control module (SCM) fails, the underwater routing unit (SRM) cannot perform normal functions for other underwater equipment. Utility Model Content

[0006] In view of this, the technical problem to be solved by this application is to provide an underwater routing unit for an underwater integrated control station. The underwater routing unit (SRU) realizes data communication and power distribution between underwater equipment and surface control system, and collects and transmits real-time data of underwater production system, so as to solve the problems of large size and high cost of existing underwater routing modules (SRM).

[0007] To address the aforementioned problems, this application provides an underwater routing unit for an underwater integrated control station, located in a shallow sea area, comprising: A sealed third cubic pressure-bearing shell, which can withstand a water depth of no more than 200 meters, and does not include a water depth compensator; no anode protection blocks are installed on the third cubic pressure-bearing shell. The third cubic pressure-bearing outer shell is equipped with an underwater routing unit that collects electrical components required for underwater equipment to obtain parameters such as pressure, temperature, and flow. These electrical components are atmospheric pressure electrical components. The top surface of the third cubic pressure-bearing shell includes electrical connectors and fiber optic connectors. The underwater routing unit realizes underwater power distribution, fiber optic communication, photoelectric signal conversion, and power communication through the electrical connectors and fiber optic connectors on the top surface.

[0008] This application innovatively implements an underwater routing unit (SCU) for an underwater integrated control station. In addition to the functions of a traditional underwater routing module (SRM), it optimizes the structure by removing the anode protection block and internal depth compensator, significantly reducing its size and making it suitable for modular use. The volume ratio compared to a traditional SRM ranges from 0.71 to 0.81. Furthermore, the plate-type slot fixing method further optimizes the base's footprint, with a ratio of 0.68 to 0.78 compared to a traditional SRM base. The integrated design optimizes the overall size of the device, facilitating more flexible connections with other subsea equipment. It can be used independently or as part of an underwater integrated control station. This invention's underwater routing unit also enhances the monitoring and self-diagnostic functions of underwater equipment, enabling timely detection of abnormal conditions.

[0009] The underwater routing unit no longer occupies independent installation space, and it also eliminates the need for dedicated deployment and retrieval tools. Maintenance and operations are integrated with the underwater integrated control station. Assembly adjacent to the underwater control unit reduces the length of overhead wires between the traditional underwater routing module and underwater control module, and allows for shared connector parking and connector protection devices. Attached Figure Description

[0010] Figure 1A This is a three-dimensional schematic diagram of one of the underwater routing units in this application; Figure 1B for Figure 1A A front view of the underwater routing unit shown; Figure 2 This is a three-dimensional schematic diagram of one of the underwater integrated control stations in this application; Figure 3 for Figure 2 A front view of the underwater integrated control station shown. Figure 4 for Figure 2 A top view of the underwater integrated control station shown. Figure 5 for Figure 4 A partially enlarged schematic diagram of the underwater integrated control station shown; Figure 6 This is a three-dimensional schematic diagram of another underwater integrated control station in this application; Figure 7 for Figure 6 A side view of the underwater integrated control station shown. Figure 8 This is a schematic diagram of the structure of one of the underwater integrated control units in this application; Figure 9 for Figure 8 The image shows a side view of the underwater integrated control unit. Figure 10 for Figure 8 The image shows a top view of the underwater integrated control unit. Detailed Implementation

[0011] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer and more understandable, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit the scope of this application.

[0012] In this application, terms related to orientation, such as up, down, top, bottom, inside, outside, high, and low, refer to the position of the underwater routing unit under normal operating conditions.

[0013] In this application, the term MQC is an abbreviation for MultiQuick Connector, also known as a multi-way quick connector, wherein the number of hydraulic joints on the connector can be set as needed.

[0014] In this application, the term "SCU" refers to the underwater integrated control unit.

[0015] In this application, the term "SCM" is an abbreviation for Subsea Control Module, also known as an underwater control module.

[0016] In this application, the term "SCMMB" refers to the underwater control module base.

[0017] In this application, the term "SRU" refers to an underwater routing unit.

[0018] In this application, the term "SRM" refers to an underwater routing module.

[0019] To address the problems existing in the prior art, this application proposes an underwater routing unit for an underwater integrated control station, located in a shallow sea area, comprising: A sealed third cubic pressure-bearing shell, which can withstand a water depth of no more than 200 meters, and does not include a water depth compensator; no anode protection blocks are installed on the third cubic pressure-bearing shell. The third cubic pressure-bearing outer shell is equipped with an underwater routing unit that collects electrical components required for underwater equipment to obtain parameters such as pressure, temperature, and flow. These electrical components are atmospheric pressure electrical components. The top surface of the third cubic pressure-bearing shell includes electrical connectors and fiber optic connectors. The underwater routing unit uses these connectors to achieve underwater power distribution, fiber optic communication, photoelectric signal conversion, and power communication. It can provide power distribution and communication for underwater oil production equipment, including but not limited to wellheads, manifolds, and underwater control units, to enable communication between the surface main control station and the underwater equipment.

[0020] In at least one embodiment, the underwater routing unit is mounted on a carrier for lowering the underwater routing unit to the seabed; The carrier includes a base plate and multiple fixing frame assemblies. The fixing frame assemblies are fixed to the upper surface of the base plate, thereby dividing the base plate into multiple fixing spaces. The carrier is also equipped with multiple lifting rings, which are used to connect the lowering cable to lower the underwater routing unit to the seabed. The underwater routing unit is located within one of the fixed frame groups.

[0021] In at least one embodiment, each fixture assembly includes two opposing uprights forming a U-shaped receiving space between the two uprights.

[0022] In at least one embodiment, the inner side of the upright plate is provided with a plurality of longitudinal guide grooves.

[0023] In at least one embodiment, the outer wall of the third cubic pressure-bearing shell is provided with a plurality of reinforcing ribs, the number and height of which correspond to the number and depth of the guide grooves provided on the inner side of the upright plate.

[0024] In at least one embodiment, at least one of the multiple fixed frame groups includes a first partition space and a second partition space, and a partition is provided between the first partition space and the second partition space.

[0025] In at least one embodiment, a hydraulic control module is provided within the first partition space. The hydraulic control module includes a sealed first cubic pressure-bearing shell and an electro-hydraulic directional valve disposed within the first cubic pressure-bearing shell. The first cubic pressure-bearing shell withstands pressure at a water depth of no more than 200 meters. The first cubic pressure-bearing shell does not include a depth compensator or an underwater electronic module. The bottom surface of the first cubic pressure-bearing shell is a plane, and the front and / or rear sides of the first cubic pressure-bearing shell are provided with a hydraulic input MQC docking plate, a hydraulic output MQC docking plate, and an MQC flywire connection plate.

[0026] In at least one embodiment, a filtration and energy storage module is provided within the second partition space. The filtration and energy storage module includes a sealed second cubic pressure-bearing shell and an accumulator and filter encapsulated within the second cubic pressure-bearing shell. The accumulator provides a stable hydraulic driving force for at least one hydraulic control module, enabling the hydraulic control module to open and close the subsea tree or manifold actuator valve. The bottom surface of the second cubic pressure-bearing shell is flat. The front and / or rear sides of the second cubic pressure-bearing shell are provided with MQC flywire connection plates and hydraulic input MQC docking plates for connecting to a hydraulic source from the offshore platform. The MQC flywire connection plates on the second cubic pressure-bearing shell are connected to the MQC flywire connection plates on the first cubic pressure-bearing shell via flywires. The filtration and energy storage module filters and stabilizes the hydraulic oil flowing into it. The hydraulic input MQC docking plates and hydraulic output MQC docking plates on the hydraulic control module are connected to the tree or manifold actuator valve, enabling the hydraulic control module to control the opening and closing of the subsea tree or manifold actuator valve according to instructions from the ground control station.

[0027] In at least one embodiment, the top surface of the first cubic pressure-bearing shell of the hydraulic control module also includes multiple wet electrical connectors, and the underwater routing unit is connected to the wet electrical connectors of the hydraulic control module via a cable to achieve electrical connection with the hydraulic control module.

[0028] In at least one embodiment, the third cubic pressure-bearing shell is also provided with multiple lifting rings for connecting the lowering cables.

[0029] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0030] like Figure 1A and 1BThe diagram shows a schematic of an underwater routing unit 20 according to one embodiment of this application. This underwater routing unit 20 is used to implement power distribution, fiber optic communication, photoelectric signal conversion, and communication for underwater oil production equipment. It also collects various pressure and temperature sensor signals during the underwater oil and gas production process, including production signals, equipment status monitoring signals, and video signal lights, and transmits the collected signals to the ground control station in real time, achieving intelligent monitoring of underwater oil and gas extraction. The underwater routing unit 20 includes a sealed third cubic pressure-bearing shell 25, which can withstand pressure at a water depth of no more than 200 meters. The third cubic pressure-bearing shell 25 encapsulates the electrical components required for the underwater routing unit, such as a power module, control module, solenoid valve drive module, data acquisition module, and communication module. All electrical components are at atmospheric pressure, and the third cubic pressure-bearing shell 25 does not include a depth compensator. The underwater routing unit has a volume of approximately 900mm*600mm*1200mm, which is significantly smaller than that of existing technologies. The top surface of the third cubic pressure-bearing shell 25 is provided with an electrical connector 21, fiber optic connectors including dry fiber optic connection positions 26 and wet fiber optic connection positions 24, and a lifting ring 23. The electrical connector 21 includes dry and wet connectors. The dry connector is used to connect to the electronic equipment in the underwater routing unit, and the wet connector is used for underwater plugging and unplugging operations. The lifting ring 23 is used to connect the lifting cable when the underwater routing unit is retrieved or lowered separately. The sides of the third cubic pressure-bearing shell 25 are also provided with guide fins 22 and anti-collision strips 27. Compared with the traditional SRM, the underwater routing unit 20 is more compact and modular in design. Its installation positioning, locking and unlocking mechanisms are decoupled from the underwater control module, so it is easy to replace and plug and play. In extreme maintenance situations, no retrieval tools are required. It can be easily retrieved by divers or underwater robots for operation at sea without the use of large vessels, reducing maintenance costs. Furthermore, because the third cubic pressure-bearing outer shell adopts a pressure-resistant design, the internal components do not need to use expensive pressure-resistant components, thus saving costs, while ensuring that the usage requirements are met. This underwater routing unit 20 can be installed in... Figure 2 or Figure 6The carrier shown can be used independently within a mounting frame assembly. When the underwater routing unit 20 is installed within a mounting frame assembly of an underwater integrated control station, its guide fins 22 are inserted into guide grooves on the inner side of the upright plate. Compared to traditional SRMs, the underwater routing unit (SRU) has undergone structural optimization, removing the anode protection block and internal depth compensator from the main body, resulting in a significantly reduced size and suitability for modular use. Cathodic protection is an electrochemical protection technology used to prevent metal corrosion in dielectrics. Cathodic protection is divided into sacrificial anode protection and impressed current protection. This module uses the sacrificial anode method, with the entire module relying on the cathodic protection system for corrosion protection. The underwater routing unit (SRU) body is tightly connected to the skid-mounted mounting base via locking tools and a guide frame metal, thereby sacrificing the aluminum-based or zinc-based anode material configured on the skid-mounted base for corrosion protection.

[0031] like Figure 2 The figure shows a three-dimensional schematic diagram of one of the underwater integrated control stations of this application. The underwater integrated control station is set in a shallow sea area with a water depth of no more than 200 meters. An umbilical cable connects it to the ground master control station and the valve actuators of the subsea tree or manifold actuators. The underwater integrated control station is used to control the opening and closing of the subsea tree or manifold actuators according to the control signals of the ground master control station. As shown in the figure, the underwater integrated control station includes a carrier 10, and one or more hydraulic control modules 30 and one or more filtration and energy storage modules 40, and even one or more underwater routing units 20, mounted on the carrier 10.

[0032] Specifically, the carrier 10 includes a substrate 11 and multiple fixing frames. The fixing frames are fixed to the upper surface of the substrate 11, thereby dividing the substrate 11 into multiple fixing spaces, such as... Figure 2 and Figure 3The underwater integrated control station shown is relatively compact, comprising three fixed spaces. Each fixed frame assembly includes at least two opposing upright plates, as shown in the figure (first upright plate 12a and second upright plate 12b). A U-shaped accommodating space is formed between the two upright plates to accommodate one or more hydraulic control modules 30, one or more filtration and energy storage modules 40, and even one or more underwater routing units 20. Each fixed frame assembly can also be equipped with a base plate as needed. The outer surface of the upright plates is provided with multiple electrical connector sockets, which have complementary shapes to the hydraulic interfaces, for accommodating electrical connectors of unused lines. Protective frames 17 are also provided at both ends of the carrier 10, parallel to the upright plates of each fixed frame assembly. Multiple lifting rings are also provided on the protective frames 17, for example, one ring at each of the four corners, for connecting the lowering cable to lower the underwater integrated control station to the seabed. Reinforcing ribs can also be provided on the sides of the protective frames 17 to enhance their robustness. Optionally, the lifting rings can be positioned in other locations to ensure a stable and secure connection of the underwater integrated control station. The carrier 10 may also be equipped with a locking mechanism to fix the underwater integrated control station to the seabed after it is lowered to the seabed. The locking mechanism may be an anchor pile or a chain.

[0033] like Figure 2 As shown in Figures 3 and 4, multiple fixed frame groups on the underwater integrated control station have various space allocation schemes. One typical scheme is that the fixed frame group includes a first partition space and a second partition space, with a partition 15, such as a metal partition or bracket, between the first and second partition spaces. Optionally, the space allocation of the fixed frame group can also be front-to-back partitions or left-to-right partitions, depending on the need to effectively utilize space and facilitate the connection between the hydraulic control module 30 and the filtration and energy storage module 40. Figure 2 As shown, the hydraulic control module 30 is disposed in the first partition space within one of the fixed frame groups, and the filtration and energy storage module 40 is disposed in the second partition space. The first and second partition spaces are located within the same fixed frame group, with the first partition space situated above the second partition space. In an optional embodiment, the first and second partition spaces are located in different fixed frame groups.

[0034] like Figure 3 , 4As shown, the hydraulic control module 30 includes a sealed first cubic pressure-bearing shell 35 and an electro-hydraulic directional valve (not shown) disposed within the first cubic pressure-bearing shell 35. The first cubic pressure-bearing shell 35 does not include a depth compensator or underwater electronic module. The first cubic pressure-bearing shell is made of pressure-bearing metal and can withstand pressure at a water depth of no more than 200 meters. The overall volume of the hydraulic control module 30 is approximately 800mm * 600mm in base area and 1.4-1.6m in height, significantly reducing its volume compared to existing underwater control modules. The bottom surface of the first cubic pressure-bearing shell 35 is flat and does not have any interfaces. Its front and / or rear sides are equipped with a hydraulic input MQC docking plate 32, a hydraulic output MQC docking plate 33, and an MQC flywire connection plate 31. Its left and right sides are adjacent to two opposing upright plates of the fixed frame assembly. To further enhance the strength of the first cubic pressure-bearing shell 35, multiple longitudinal guide grooves 14 are provided on the inner surfaces of the upright plates 12a and 12b. Multiple longitudinal reinforcing ribs 34 are provided on the outer walls of the left and right sides of the first cubic pressure-bearing shell 35. The number and height of the longitudinal reinforcing ribs 34 correspond to the number and depth of the longitudinal guide grooves 14. In use, the longitudinal reinforcing ribs 34 of the hydraulic control module 30 are aligned with the corresponding guide grooves 14 on the upright plates from the top of the first partition space, and then inserted into the first partition space along the guide grooves 14, thus quickly installing the hydraulic control module 30. The top surface of the first cubic pressure-bearing shell also includes multiple wet electrical connectors for connecting an external underwater routing unit.

[0035] like Figure 3 , 4As shown, the filtration and energy storage module 40 includes a sealed second cubic pressure-bearing housing and an accumulator and filter (not shown) encapsulated within the second cubic pressure-bearing housing. The accumulator provides a stable hydraulic driving force for at least one hydraulic control module 30, enabling the hydraulic control module 30 to open and close valves of the subsea production tree or manifold. The filter filters the hydraulic oil from the offshore platform's hydraulic source before allowing it to enter the hydraulic control module 30, ensuring the cleanliness of the hydraulic oil entering the hydraulic control module 30 and preventing blockages in the hydraulic system. The bottom surface of the second cubic pressure-bearing housing is flat, and the front and / or rear sides of the second cubic pressure-bearing housing are provided with an MQC fly-wire connection plate 42 and a hydraulic input MQC docking plate 41. In operation, the MQC fly-wire connection plate 42 on the second cubic pressure-bearing housing is connected to the MQC fly-wire connection plate 31 on the first cubic pressure-bearing housing via a fly-wire, and the hydraulic input MQC docking plate 41 on the filtration and energy storage module 40 is connected to the manifold hydraulic system. The input pipeline connects to the hydraulic power source from the offshore platform. The hydraulic output MQC docking plate 33 and the hydraulic input MQC docking plate 32 on the hydraulic control module 30 connect to the subsea tree or manifold actuator valve. The filter of the filter and energy storage module 40 first filters the hydraulic oil from the hydraulic power source to ensure that the hydraulic oil flowing into the hydraulic control module 30 is clean. Then, it is stabilized by the energy storage device to ensure that the hydraulic oil entering the hydraulic control module 30 has sufficient driving force so that the hydraulic control module 30 can control the opening and closing of the subsea tree or manifold actuator valve according to the instructions of the ground master control station.

[0036] The hydraulic control module 30 is locked to the corresponding mounting bracket by a first locking member; the filtration and energy storage module 40 is locked to the corresponding mounting bracket by a second locking member, ensuring that the hydraulic control module 30 and the filtration and energy storage module 40 are a solid whole with the carrier 10. The first and second locking members can be any existing locking structure for locking. For the filtration and energy storage module 40, to facilitate its installation and removal, a first guide 13, such as a slide rail, is provided on the bottom plate surface within the U-shaped receiving space. A second guide 13, such as a slider that cooperates with the slide rail, is provided at the bottom of the second cubic pressure-bearing shell of the filtration and energy storage module 40. After the second guide 13 and the first guide 13 are complementary, the filtration and energy storage module 40 slides along the first guide 13 or the bottom surface of the carrier, which can realize the quick installation or removal of the filtration and energy storage module 40.

[0037] like Figure 6 and 7Another embodiment of the underwater integrated control station shown includes more mounting brackets, meaning it can accommodate more hydraulic control modules 30, filtration and energy storage modules 40, and underwater routing units 20. Multiple filtration and energy storage modules 40 are mounted on a bracket 18, and through the sliding connection between the bracket 18 and the carrier 10, multiple filtration and energy storage modules 40 can be installed onto the carrier or detached from the carrier 10 at once.

[0038] like Figure 8-10As shown, an underwater integrated control unit consists of a hydraulic control module 30 and a filtration and energy storage module 40. It includes an outer frame 50 with two partitioned spaces, one for housing the hydraulic control module 30 and the other for housing the filtration and energy storage module 40. The hydraulic control module 30 includes a sealed first cubic pressure-bearing housing 35 and an electro-hydraulic directional valve (not shown) disposed within the first cubic pressure-bearing housing 35. The first cubic pressure-bearing housing 35 does not include a depth compensator or underwater electronic module. The first cubic pressure-bearing housing 35 is made of pressure-bearing metal and can withstand pressure at a depth not exceeding 200 meters. The bottom surface of the first cubic pressure-bearing housing 35 is flat and has no interfaces. Its front and / or rear sides are provided with a hydraulic input MQC docking plate 32, a hydraulic output MQC docking plate 33, and an MQC flywire connection plate 31. The filtration and energy storage module 40 includes a sealed second cubic pressure-bearing housing and an accumulator and filter (not shown in the figure) encapsulated within the second cubic pressure-bearing housing. The accumulator provides a stable hydraulic driving force to the hydraulic control module 30, enabling the hydraulic control module 30 to open and close the valves of the subsea tree or manifold actuator. The bottom surface of the second cubic pressure-bearing housing is flat, and the front and / or rear sides of the second cubic pressure-bearing housing are provided with an MQC fly-wire connection plate 42 and a hydraulic input MQC docking plate 41. In operation, the MQC fly-wire connection plate 42 on the second cubic pressure-bearing housing connects to the MQC fly-wire connection plate 31 on the first cubic pressure-bearing housing via... The hydraulic input MQC docking plate 41 on the filter and energy storage module 40 is connected to the main hydraulic input pipeline of the manifold, i.e., connected to the hydraulic power source from the offshore platform. The hydraulic output MQC docking plate 33 and the hydraulic input MQC docking plate 32 on the hydraulic control module 30 are connected to the subsea tree or manifold actuator valve. The filter of the filter and energy storage module 40 first filters the hydraulic oil from the hydraulic power source, ensuring that the hydraulic oil flowing into the hydraulic control module 30 is clean. Then, the hydraulic oil is stabilized by the accumulator, giving the hydraulic oil entering the hydraulic control module 30 sufficient driving force so that the hydraulic control module 30 can control the opening and closing of the subsea tree or manifold actuator valve according to the instructions of the ground master control station. The hydraulic control module 30 is locked to the outer frame 50 by the first locking member; the filter and energy storage module 40 is locked to the outer frame 50 by the second locking member, ensuring that the hydraulic control module 30 and the filter and energy storage module 40 and the outer frame 50 form a solid whole. The first and second locking elements can be any existing locking structure for achieving locking; for example, the hydraulic module locking element is a rotary handle type, and the filter and energy storage module locking element is an upper and lower insert type. The bottom of the filter and energy storage module 40 can also be equipped with casters, allowing for quick installation of the filter and energy storage module 40 into the outer frame 50. A sliding structure can also be provided at the bottom of the outer frame 50. The underwater integrated control unit can be used independently or as part of an underwater integrated control station.

[0039] The underwater integrated control station of this invention can be hoisted, installed, and recovered as a whole, or any module on the underwater integrated control station can be installed and recovered individually. Relying on the locking device designed on the underwater integrated control station, the hydraulic control module, filtration and energy storage module, and underwater routing unit can be disassembled and installed separately. They can be installed and recovered as an integrated unit with the carrier, or, if a single component malfunctions, can be quickly replaced by divers or underwater robots. This reduces maintenance costs and production losses without the need for large vessels. Utilizing the external MCQ interface and detachable plug-in structure, one hydraulic control module 30 can be compatible with multiple oil wells, thus achieving interchangeability of the hydraulic control modules 30 for different oil well platforms and providing temporary backup for emergency maintenance and recovery of the SCU (underwater integrated control station).

[0040] In existing technologies, underwater control modules are prone to failure due to aging of the accumulator bladder or clogging of the filter, requiring the use of large vessels for recovery and repair. In contrast, the independent hydraulic control module 30 and the filtration and energy storage module 40 of this invention can be replaced independently in case of failure, effectively reducing the testing workload and shortening the maintenance cycle during control unit repair. The independent hydraulic control module 30 uses a pressure-bearing shell and a separate hydraulic control module, reducing the installation volume. Furthermore, the horizontally opposed installation of the hydraulic interface using MQC reduces the likelihood of contamination of the hydraulic joint by sediment and marine organisms during underwater docking. The modular design of the SCU facilitates the formation of module arrays or redundant configurations. Due to the compact size of the modular SCU, even with redundant configurations, the overall size is much smaller than in existing technologies. Moreover, multiple MQC hydraulic connectors can be replaced between modules. Thus, in the event of a module failure, the corresponding hydraulic and electrical connections can be directly replaced to the backup module, ensuring normal production of oil and gas wells under SCU failure conditions and reducing production losses due to equipment maintenance. The small, modular SCU uses simple lifting rings and corresponding carriers to complete the lowering and retrieval. In shallow water environments, it can be operated by divers with the help of small boats, eliminating the need for specialized lowering and retrieval tools and large construction vessels. It has low requirements for sea conditions and reduces a lot of construction costs.

[0041] The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but this does not limit the scope of the invention. Those skilled in the art can implement the present invention in various modifications without departing from its scope and spirit; for example, a feature of one embodiment can be used in another embodiment to obtain yet another embodiment. Any modifications, equivalent substitutions, and improvements made within the scope of the present invention should be within the scope of the present invention.

Claims

1. An underwater routing unit for an underwater integrated control station, characterized in that: Located in shallow sea areas, including: A sealed third cubic pressure-bearing shell, which can withstand pressure at a water depth of no more than 200 meters, and does not include a water depth compensator; no anode protection block is installed on the third cubic pressure-bearing shell; The third cubic pressure-bearing outer shell is equipped with electrical components required by the underwater routing unit to collect underwater equipment parameters including pressure, temperature, and flow rate. These electrical components are atmospheric pressure electrical components. The top surface of the third cubic pressure-bearing shell includes an electrical connector and an optical fiber connector. The underwater routing unit realizes underwater power distribution, optical fiber communication, photoelectric signal conversion and power communication through the electrical connector and optical fiber connector on the top surface.

2. The underwater routing unit according to claim 1, characterized in that: The underwater routing unit is mounted on a carrier, which is used to lower the underwater routing unit to the seabed. The carrier includes a base plate and multiple fixing frame assemblies. The fixing frame assemblies are fixed to the upper surface of the base plate, thereby dividing the base plate into multiple fixed spaces. The carrier is also provided with multiple lifting rings for connecting a lowering cable to lower the underwater routing unit to the seabed. The underwater routing unit is located within one of the fixed frame groups.

3. The underwater routing unit according to claim 2, characterized in that: Each of the fixed frame groups includes two opposing upright plates, with a U-shaped receiving space formed between the two upright plates.

4. The underwater routing unit according to claim 3, characterized in that: The inner side of the upright plate is provided with multiple longitudinal guide grooves.

5. The underwater routing unit according to claim 4, characterized in that: The outer wall of the third cubic pressure-bearing shell is provided with multiple reinforcing ribs, and the number and height of the reinforcing ribs correspond to the number and depth of the guide grooves provided on the inner side of the upright plate.

6. The underwater routing unit according to claim 2, characterized in that: At least one of the plurality of fixed frame groups includes a first partition space and a second partition space, and a partition is provided between the first partition space and the second partition space.

7. The underwater routing unit according to claim 6, characterized in that: A hydraulic control module is provided within the first partition space. The hydraulic control module includes a sealed first cubic pressure-bearing shell and an electro-hydraulic directional valve disposed within the first cubic pressure-bearing shell. The first cubic pressure-bearing shell can withstand a water depth of no more than 200 meters. The first cubic pressure-bearing shell does not include a depth compensator or an underwater electronic module. The bottom surface of the first cubic pressure-bearing shell is flat, and the front and / or rear sides of the first cubic pressure-bearing shell are provided with a hydraulic input MQC docking plate, a hydraulic output MQC docking plate, and an MQC flywire connection plate.

8. The underwater routing unit according to claim 7, characterized in that: The second partition space is equipped with a filtration and energy storage module. The filtration and energy storage module includes a sealed second cubic pressure-bearing shell and an accumulator and filter encapsulated within the second cubic pressure-bearing shell. The accumulator provides a stable hydraulic driving force for at least one of the hydraulic control modules, enabling the hydraulic control module to open and close the subsea tree or manifold actuator valves. The bottom surface of the second cubic pressure-bearing shell is flat. The front and / or rear sides of the second cubic pressure-bearing shell are provided with MQC flywire connection plates and hydraulic input MQC docking plates for connecting to the hydraulic power source from the offshore platform. The MQC flywire connection plates on the second cubic pressure-bearing shell are connected to the MQC flywire connection plates on the first cubic pressure-bearing shell via flywires. The filtration and energy storage module filters and stabilizes the hydraulic oil flowing into it. The hydraulic input MQC docking plates and hydraulic output MQC docking plates on the hydraulic control module are connected to the tree or manifold actuator valves, enabling the hydraulic control module to control the opening and closing of the subsea tree or manifold actuator valves according to the instructions of the ground control station.

9. The underwater routing unit according to claim 7, characterized in that: The top surface of the first cubic pressure-bearing shell of the hydraulic control module also includes multiple wet electrical connectors. The underwater routing unit is connected to the wet electrical connectors of the hydraulic control module via a cable to achieve electrical connection with the hydraulic control module.

10. The underwater routing unit according to claim 1, characterized in that: The third cubic pressure-bearing outer shell is also equipped with multiple lifting rings for connecting the lowered cables.

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