An underwater integrated control unit

Abstract

The application discloses an underwater integrated control unit arranged in a shallow sea area, which comprises a hydraulic control module, the hydraulic control module comprising a sealed first cubic pressure-bearing shell, a hydraulic input MQC docking plate, a hydraulic output MQC docking plate and an MQC flying lead connecting plate arranged on the front side and / or the rear side of the first cubic pressure-bearing shell, and a filtering and energy storage module comprising an energy accumulator and a filter packaged in a second cubic pressure-bearing shell, the second cubic pressure-bearing shell being provided with an MQC flying lead connecting plate and a hydraulic input MQC docking plate, the MQC flying lead connecting plate on the second cubic pressure-bearing shell being connected with the MQC flying lead connecting plate on the first cubic pressure-bearing shell through a flying lead, and the hydraulic input MQC docking plate and the hydraulic output MQC docking plate on the hydraulic control module being connected with a Christmas tree or a manifold execution valve, so that the hydraulic control module controls the opening and closing of a valve of the subsea Christmas tree or the manifold execution valve according to an instruction of a ground master station.

Description

Technical Field

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

[0002] The underwater control module (SCM) is the core and brain of the underwater production control system. Currently, the most mature application globally is the electro-hydraulic hybrid control underwater control module. A typical structure of an existing underwater control module is as follows: Figure 1A and 1B As shown, its outer shell is roughly cylindrical. Internally, it includes components such as an electronic acquisition unit, hydraulic control components, a depth compensator, a filter, an accumulator, and communication links. To connect with the SCM base (SCMMB) located on the seabed, which contains quick-connect hydraulic and electrical connectors and locking mechanisms, the top and bottom of the outer shell typically house the SCM body with wet-plug electrical connectors and locks, the SCM base plate with quick-connect hydraulic and electrical connectors, and a lowering guide frame. Therefore, its structure is complex and its overall volume is large. For example, a typical existing underwater control module has a bottom area of ​​900mm*900mm and a height of at least 1300mm. Furthermore, because there are numerous interfaces between the SCM base plate and the base, and the docking precision requirements are quite high, a dedicated lowering and recovery tool is needed to complete the retrieval and lowering operations of the underwater control module. A corresponding lowering guide frame is also required, and a construction vessel with dynamic positioning capabilities is also needed to complete the operation. The related operations are cumbersome and costly.

[0003] Limited by the traditional vertically aligned locking structure of the SCM and its base, the hydraulic joints during underwater installation are vertically connected and exposed to seawater. Due to the abundance of underwater sediment and marine life in shallow waters, there is a significant risk of debris adhering to the hydraulic joints connecting the SCM and the SCM on the seabed, affecting hydraulic cleanliness and system functionality. Furthermore, existing underwater control modules have numerous components with a high probability of failure. If a unit malfunctions, it must be retrieved to land using a running tool, resulting in extremely high costs. Maintenance requires disassembling the SCM, replacing damaged or malfunctioning parts, refilling the internal oil, reassembling and sealing, and conducting comprehensive functional and performance tests to ensure the control module's functionality. Testing, including simulating external pressure environments, requires high-pressure chamber testing and vibration / shock testing, resulting in a large workload and long maintenance cycles.

[0004] To reduce costs, domestic shallow-water subsea control modules preferentially adopt a one-to-two subsea control module configuration. If the subsea control module malfunctions and needs to be retrieved for repair, it will directly affect the production of the two corresponding oil and gas wells. In addition, the long maintenance cycle of the subsea control module will further amplify this loss. Utility Model Content

[0005] In view of this, the technical problem to be solved by this application is to provide an underwater integrated control unit to solve the problems of high cost of deployment and recovery, high equipment cost and difficult maintenance of existing underwater control modules.

[0006] To address the aforementioned problems, this application provides an underwater integrated control unit, installed in a shallow sea area, connected by an umbilical cable to a ground control station and a valve actuator for the subsea tree or manifold valve, used to control the opening and closing of the subsea tree or manifold valve according to control signals from the ground control station; characterized in that it includes: The hydraulic control module includes a sealed first cubic pressure-bearing housing and an electro-hydraulic directional valve disposed within the first cubic pressure-bearing housing; the first cubic pressure-bearing housing withstands pressure at a water depth not exceeding 200 meters; the first cubic pressure-bearing housing does not include a water depth compensator; wherein, the bottom surface of the first cubic pressure-bearing housing is flat, and the front and / or rear sides of the first cubic pressure-bearing housing are provided with a hydraulic input MQC docking plate, a hydraulic output MQC docking plate, and an MQC flywire connection plate; and The filtration and energy storage module includes a sealed second cubic pressure-bearing housing and an accumulator and filter encapsulated within the second cubic pressure-bearing housing. The accumulator provides a stable hydraulic driving force to the hydraulic control module, enabling the hydraulic control module 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 MQC flywire connection plates and hydraulic input MQC docking plates for connecting to the hydraulic power source from the offshore platform. The MQC fly-wire connection plate on the second cubic pressure-bearing shell is connected to the MQC fly-wire connection plate on the first cubic pressure-bearing shell via a fly-wire. The filtration and energy storage module filters and stabilizes the hydraulic oil flowing into it. The hydraulic input MQC docking plate and hydraulic output MQC docking plate on the hydraulic control module are connected to the tree or manifold actuator valve, so that the hydraulic control module controls the opening and closing of the subsea tree or manifold actuator valve according to the instructions of the ground master control station.

[0007] This application innovatively implements an underwater integrated control unit, which seals several core functions of the underwater control module into regularly shaped and miniaturized modules through pressure-resistant sealed shells. The interface layout of each module is redesigned so that they are functionally connected via flying wires, thereby enabling independent maintenance or recovery of each module. Especially when only the filter and accumulator need to be maintained, the unit can be directly replaced, avoiding the need for complete disassembly of the control module and extensive functional testing. It also allows for flexible combination and redundant configuration, and the deployment and recovery no longer require large vessels, thereby increasing flexibility and reducing equipment and maintenance costs.

[0008] The new underwater integrated control station eliminates the overhead space, SCM base plate, and related supports that must be reserved for the hydraulic input and output connection of the SCM base in the traditional design. This allows for more effective control over the overall height. In shallow sea applications, this design can avoid the impact of excessive underwater device height on navigation and simplify the corresponding protective design (fishing net).

[0009] The underwater integrated control unit no longer occupies a separate installation space, and at the same time, it does not require special deployment and recovery tools. Maintenance and operations are considered in conjunction with the underwater integrated control station. Attached Figure Description

[0010] Figure 1A The diagram shown is a structural schematic of an existing underwater control module. Figure 1B This is a structural cross-sectional view of an existing underwater control module; Figure 2 This is a schematic diagram of the structure of one of the underwater integrated control units in this application; Figure 3 for Figure 2 The image shows a side view of the underwater integrated control unit. Figure 4 for Figure 2 A top view of the underwater integrated control unit shown; Figure 5 This is a three-dimensional schematic diagram of one of the underwater integrated control stations in this application; Figure 6 for Figure 5 A front view of the underwater integrated control station shown. Figure 7 for Figure 5 A top view of the underwater integrated control station shown. Figure 8 for Figure 7 A partially enlarged schematic diagram of the underwater integrated control station shown; Figure 9 This is a three-dimensional schematic diagram of another underwater integrated control station in this application; Figure 10 for Figure 9 A side view of the underwater integrated control station shown. Figure 11 This is a three-dimensional schematic diagram of one of the underwater routing units in this application; Figure 12 for Figure 11 The diagram shows the front view of the underwater routing 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 referring to orientation, such as up, down, top, bottom, inside, outside, high, and low, are based on the position of the underwater integrated control 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 integrated control unit, installed in a shallow sea area, which is connected by an umbilical cable to a ground control station and a valve actuator of a subsea tree or manifold valve. This actuator controls the opening and closing of the subsea tree or manifold valve based on control signals from the ground control station. The unit includes: The hydraulic control module includes a sealed first cubic pressure-bearing housing and an electro-hydraulic directional valve disposed within the first cubic pressure-bearing housing; the first cubic pressure-bearing housing withstands pressure at a water depth not exceeding 200 meters; the first cubic pressure-bearing housing does not include a water depth compensator; wherein, the bottom surface of the first cubic pressure-bearing housing is flat, and the front and / or rear sides of the first cubic pressure-bearing housing are provided with a hydraulic input MQC docking plate, a hydraulic output MQC docking plate, and an MQC flywire connection plate; and The filtration and energy storage module includes a sealed second cubic pressure-bearing housing and an accumulator and filter encapsulated within the second cubic pressure-bearing housing. The accumulator provides a stable hydraulic driving force to the hydraulic control module, enabling the hydraulic control module 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 MQC flywire connection plates and hydraulic input MQC docking plates for connecting to the hydraulic power source from the offshore platform. The MQC fly-wire connection plate on the second cubic pressure-bearing shell is connected to the MQC fly-wire connection plate on the first cubic pressure-bearing shell via a fly-wire. The filtration and energy storage module filters and stabilizes the hydraulic oil flowing into it. The hydraulic input MQC docking plate and hydraulic output MQC docking plate on the hydraulic control module are connected to the tree or manifold actuator valve, so that the hydraulic control module controls the opening and closing of the subsea tree or manifold actuator valve according to the instructions of the ground master control station.

[0020] In at least one embodiment, the top surface of the first cubic pressure-bearing shell also includes a plurality of wet electrical connectors for connecting an external underwater routing unit.

[0021] In at least one embodiment, the device further includes a fixing frame assembly, which includes two opposing uprights forming a U-shaped receiving space between them; the fixing frame assembly includes a first partition space and a second partition space, with a partition provided between the first partition space and the second partition space.

[0022] In at least one embodiment, the liquid control module is disposed in the first partition space; the filtration and energy storage module is disposed in the second partition space.

[0023] In at least one embodiment, the inner side of the upright plate is provided with a plurality of longitudinal guide grooves.

[0024] In at least one embodiment, the left and right outer walls of the first cubic pressure-bearing shell are provided with a plurality of longitudinal reinforcing ribs, the number and height of which correspond to the number and depth of the longitudinal guide grooves.

[0025] In at least one embodiment, a first guide is provided on the bottom plate surface located within the U-shaped accommodating space; a second guide is provided on the bottom of the second cubic pressure-bearing shell, and after the second guide and the first guide are complementaryly combined, the filtration and energy storage module slides along the first guide.

[0026] In at least one embodiment, a carrier is also included, on which multiple fixing frames are disposed.

[0027] In at least one embodiment, the mounting frame is further provided with multiple lifting rings for connecting the lowering cable to lower the underwater integrated control unit to the seabed.

[0028] In at least one embodiment, the mounting bracket is further provided with a first locking member and a second locking member, wherein the hydraulic control module is locked to the corresponding mounting bracket via the first locking member; and the filtration and energy storage modules are locked to the corresponding mounting bracket via the second locking member.

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

[0030] like Figure 2-4The diagram shows an underwater integrated control unit (SCU) provided in one embodiment of this application, comprising a hydraulic control module 30 and a filtration and energy storage module 40. The SCU 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, but may include electronic control components for internal solenoid valves or underwater valves, such as an integrated valve island, solenoid valve, pressure sensor, underwater electronic module (SEM), hydraulic circuit, and other components related to the filter and energy storage. The SCU controls the hydraulic switching of the underwater valves, and the SEM controls the switching of the solenoid valves inside the SCU. The first cubic pressure-bearing shell 35 is made of pressure-bearing metal and can withstand pressure at a water depth of no more than 200 meters. The bottom surface of the first cubic pressure-bearing shell 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 shell and an accumulator and filter (not shown in the figure) encapsulated within the second cubic pressure-bearing shell. 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 shell is flat, and its front and / or rear sides are provided with an MQC flywire connection plate 42 and a hydraulic input MQC docking plate 41. In operation, the MQC flywire connection plate 42 on the second cubic pressure-bearing shell connects to the MQC flywire connection plate 31 on the first cubic pressure-bearing shell 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 that enables locking, such as a rotary handle locking element for the hydraulic control module and a top-and-bottom insert locking element for the filter and energy storage module.The bottom of the filtration and energy storage module 40 can also be equipped with casters, allowing for quick installation of the filtration 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.

[0031] like Figure 5 The diagram shown is a three-dimensional representation of one of the underwater integrated control stations described in this application. This underwater integrated control station is located in a shallow sea area with a water depth not exceeding 200 meters. An umbilical cable connects it to a ground-based master control station and the valve actuators of the subsea tree or manifold actuators. This underwater integrated control station is used to control the opening and closing of the subsea tree or manifold actuators based on control signals from the ground-based master control station. Figure 5 As shown, the underwater integrated control station includes a carrier 10 and one or more underwater integrated control units mounted on the carrier 10. Each underwater integrated control unit includes a hydraulic control module 30 and one or more filtration and energy storage modules 40, or even one or more underwater routing units 20.

[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 5 and Figure 6 The 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 receiving 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 lifting ring at each of the four corners of the protective frame 17, 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 strength. Optionally, the lifting rings can also be located in other positions 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 5As shown in Figures 6 and 7, 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 5 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 6 , 7 As shown in Figure 8, the hydraulic control module 30 includes a sealed first cubic pressure-bearing shell 35 and an electro-hydraulic directional valve (not shown in the figure) disposed within the first cubic pressure-bearing shell 35. The first cubic pressure-bearing shell 35 does not include a depth compensator. 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 6 , 7As 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 9 and 10Another 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] The underwater integrated control station may also include one or more underwater routing units, which are modules for underwater power distribution, fiber optic communication, photoelectric signal conversion and communication, as well as for collecting various sensor signals during the underwater oil and gas production process, including production signals, equipment status monitoring signals and video signals, and transmitting the collected signals to the surface main control station in real time to achieve intelligent monitoring of underwater oil and gas extraction. Figure 11-12 The diagram shows the structure of the underwater routing unit 20 in the underwater integrated control station of this application. 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, a control module, a solenoid valve drive module, a data acquisition module, and a communication module. All electrical components are atmospheric pressure electrical components, and the third cubic pressure-bearing shell 25 does not include a depth compensator. The volume of the underwater routing unit is approximately 900mm*600mm*1200mm, which is significantly smaller than that of the prior art. The top surface of the third cubic pressure-bearing housing 25 is equipped with an electrical connector 21, a dry fiber optic connection position 26, a wet fiber optic connection position 24, and a lifting ring 23. The electrical connector 21 includes both dry and wet connectors. The dry connector is used to connect to the electronic equipment within the underwater routing unit, while the wet connector is used for underwater plugging and unplugging operations. The lifting ring 23 is used to connect the lifting cable when independently recovering or lowering the underwater routing unit. The sides of the third cubic pressure-bearing housing 25 are also equipped with guide fins 22 and anti-collision strips 27. Compared to traditional SRMs, this underwater routing unit 20 is more compact and modular in design. Its installation, positioning, locking, and unlocking mechanisms are separate from the underwater control module, making replacement convenient and plug-and-play. In extreme maintenance situations, no recovery tools are required, and it can be easily recovered by divers or underwater robots for offshore operations without the need for large vessels, reducing maintenance costs. In addition, because the housing is designed to withstand pressure, the internal components do not need to use expensive pressure-resistant components, saving costs while ensuring that usage requirements are met. The underwater routing unit 20 can be set to Figure 5 or Figure 9The underwater integrated control station shown can be used independently within a fixed frame assembly. When the underwater routing unit 20 is installed within a fixed frame assembly of the underwater integrated control station, its guide fin 22 is inserted into a guide groove provided on the inner side of the upright plate.

[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 integrated control unit, installed in a shallow sea area, connected by an umbilical cable to a ground control station and a valve actuator of a subsea tree or manifold actuator, used to control the opening and closing of the subsea tree or manifold actuator according to control signals from the ground control station; characterized in that... include: The hydraulic control module includes a sealed first cubic pressure-bearing housing and an electro-hydraulic directional valve disposed within the first cubic pressure-bearing housing; The first cubic pressure-bearing shell can withstand water pressure of no more than 200 meters; the first cubic pressure-bearing shell does not include a water depth compensator; wherein, 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; and A filtration and energy storage module includes a sealed second cubic pressure-bearing housing and an accumulator and filter encapsulated within the second cubic pressure-bearing housing. The accumulator provides a stable hydraulic driving force to the hydraulic control module, enabling the hydraulic control module to open and close valves of the subsea production tree or manifold. 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 MQC flywire connection plates and hydraulic input MQC docking plates for connecting to a hydraulic source from the offshore platform. The MQC fly-wire connection plate on the second cubic pressure-bearing shell is connected to the MQC fly-wire connection plate on the first cubic pressure-bearing shell via a fly-wire. The filtration and energy storage module filters and stabilizes the hydraulic oil flowing into it. The hydraulic input MQC docking plate and hydraulic output MQC docking plate on the hydraulic control module are connected to the wellhead or manifold actuator valve, so that the hydraulic control module controls the opening and closing of the subsea wellhead or manifold actuator valve according to the instructions of the ground master control station.

2. The underwater integrated control unit according to claim 1, characterized in that: The top surface of the first cubic pressure-bearing shell also includes multiple wet electrical connectors for connecting an external underwater routing unit.

3. The underwater integrated control unit according to claim 1, characterized in that: It also includes a fixed frame assembly, which includes two opposing upright plates forming a U-shaped accommodating space between the two upright plates; the fixed frame assembly 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.

4. The underwater integrated control unit according to claim 3, characterized in that: The liquid control module is located in the first partition space; the filtration and energy storage module is located in the second partition space.

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

6. The underwater integrated control unit according to claim 5, characterized in that: The left and right sides of the first cubic pressure-bearing shell are provided with multiple longitudinal reinforcing ribs, and the number and height of the longitudinal reinforcing ribs correspond to the number and depth of the longitudinal guide grooves.

7. The underwater integrated control unit according to claim 3, characterized in that: A first guide is provided on the bottom plate surface located within the U-shaped accommodating space; a second guide is provided on the bottom of the second cubic pressure-bearing shell. After the second guide and the first guide are combined in a complementary manner, the filtration and energy storage module slides along the first guide.

8. The underwater integrated control unit according to claim 3, characterized in that: It also includes a carrier on which multiple fixing frames are provided.

9. The underwater integrated control unit according to claim 3, characterized in that: The mounting frame is also equipped with multiple lifting rings, which are used to connect the lowering cable to lower the underwater integrated control unit to the seabed.

10. The underwater integrated control unit according to claim 3, characterized in that: The mounting bracket is also provided with a first locking element and a second locking element. The hydraulic control module is locked to the corresponding mounting bracket by the first locking element; the filtration and energy storage module is locked to the corresponding mounting bracket by the second locking element.

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