Emergency well sealing special ROV driven underwater choke valve

Abstract

The utility model discloses a kind of ROV drive underwater throttling valves special for emergency well shut-in, it is related to marine oil and gas exploitation equipment technical field, comprising: the bottom of valve body is provided with axial installation passage;Lower-mounted valve seat assembly includes valve seat and locking piece, valve seat extrusion sealing connection is in axial installation passage, locking piece is tightly connected in the bottom opening of axial installation passage;The fixed end of ROV drive wrench is fixedly connected with valve cover, the output end of ROV drive wrench is connected with driving shaft, the end of driving shaft away from ROV drive wrench is connected with valve stem by conversion component;Pointer type visual switch display mechanism includes pivot, pointer and signboard, one end of pointer is fixedly connected with pivot, signboard is fixedly connected on the outside of valve cover, pivot is drivingly connected with driving shaft, to drive pointer to rotate, and the numerical value that pointer indicates on signboard corresponds the switch state of throttling valve, the utility model structure is simple, convenient to use, it is convenient to maintain, effectively save deployment cost.

Description

Technical Field

[0001] This utility model relates to the field of marine oil and gas extraction equipment technology, and in particular to a special ROV-driven subsea throttle valve for emergency well sealing. Background Technology

[0002] In offshore oil and gas extraction, traditional underwater throttle valves have revealed numerous technical shortcomings. Maintenance and replacement require complete disassembly of the throttle valve, a complex and time-consuming process. Due to the high pressure of the deep-sea environment, traditional throttle valves necessitate high-pressure compensation designs, but this design reduces equipment operating efficiency. Furthermore, additional leak-proof designs to prevent hydraulic oil leakage further increase the manufacturing cost of the throttle valve. These problems are particularly prominent in deep-sea oil and gas field development operations, severely impacting operational efficiency and economics. Therefore, a submersible throttle valve that can effectively solve these problems is urgently needed. Utility Model Content

[0003] The purpose of this invention is to provide a dedicated ROV-driven underwater throttle valve for emergency well sealing, which solves the problems existing in the prior art. It has a simple structure, is easy to use and maintain, and effectively saves deployment costs.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] This utility model provides a special ROV-driven underwater throttle valve for emergency well sealing, comprising: a valve body, a bottom-mounted valve seat assembly, a valve core, a valve cover, a valve stem, an ROV drive mechanism, and a pointer-type visual switch display mechanism. The bottom of the valve body has an axial mounting channel. The bottom-mounted valve seat assembly includes a valve seat and a locking element. The valve seat is press-sealed within the axial mounting channel, and the locking element is tightly connected to the bottom opening of the axial mounting channel. The valve core is hot-pressed into the inner cavity of the valve seat. The valve cover is mounted on the top of the valve body. One end of the valve stem moves within the valve seat and valve core cavity, and the other end passes through the valve cover. The ROV drive mechanism includes an ROV drive wrench and a drive mechanism. The ROV drive wrench has a fixed end that is fixedly connected to the valve cover, and an output end that is connected to the drive shaft to drive the drive shaft to rotate. The end of the drive shaft away from the ROV drive wrench is connected to the valve stem through the conversion assembly to convert the rotation of the drive shaft into linear movement of the valve stem. The pointer-type visual switch display mechanism includes a rotating shaft, a pointer, and an indicator plate. One end of the pointer is fixedly connected to the rotating shaft, and the indicator plate is fixedly connected to the outside of the valve cover. The rotating shaft is driven by the drive shaft to drive the pointer to rotate, and the value indicated by the pointer on the indicator plate corresponds to the on / off state of the throttle valve.

[0006] Preferably, the locking element is a locking nut, the bottom opening of the axial mounting channel is provided with an internal thread, and the locking nut is provided with an external thread, so that the locking nut is threadedly connected to the bottom opening of the axial mounting channel, and the locking nut is rotatably connected to the valve seat.

[0007] Preferably, it also includes a retaining ring. The valve seat has a first annular groove at one end near the locking nut, and the locking nut has a second annular groove at one end near the valve seat. One end of the retaining ring is sleeved and engaged in the first annular groove, and the other end is sleeved and engaged in the second annular groove, so that the valve seat and the locking nut are rotatably connected, and a gap is provided between the valve seat and the locking nut, in which a wear-resistant gasket is placed.

[0008] Preferably, the retaining ring comprises two half-rings and a plurality of screws, wherein the two half-rings are connected to form the retaining ring by the screws.

[0009] Preferably, it also includes a buffer pad, the locking nut is provided with a limit ring, and the buffer pad is provided on the side of the valve core facing the locking nut to prevent the valve stem from damaging the valve core due to excessive torque when the throttle valve is closed.

[0010] Preferably, the bottom-mounted valve seat assembly further includes a first sealing ring and a second sealing ring. The valve seat has a first annular groove and a second annular groove at both ends, respectively. The first sealing ring is disposed in the first annular groove, and the second sealing ring is disposed in the second annular groove so that the valve seat and the valve body are squeezed and sealed.

[0011] Preferably, the conversion assembly includes an adapter section, a threaded section, a guide key, and a sealing cap. The adapter section is integrally connected to the end of the drive shaft away from the ROV drive wrench, and the adapter section is provided with a threaded hole. The threaded section is integrally connected to the end of the valve stem away from the valve core, and the threaded section is used for threaded connection to the threaded hole. The sealing cap is sealed and fixedly connected to the valve cover, and the sealing cap is provided with a guide groove. The guide key is integrally connected to the outside of the valve stem, and the guide key is slidably connected in the guide groove.

[0012] Preferably, the ROV drive mechanism further includes an anti-torque socket, an ROV adapter, and a positioning pin. The anti-torque socket is fixed to the valve cover and connected to the fixed end of the ROV drive wrench. One end of the ROV adapter is fixedly connected to the ROV drive wrench, and the other end is connected to the top end of the drive shaft through the positioning pin.

[0013] Preferably, it further includes a first reduction gear, a reduction gear shaft, and a second reduction gear. The reduction gear shaft is rotatably connected to the valve cover. The first reduction gear is sleeved and fixed on the outside of the reduction gear shaft and is meshed with the drive shaft. The second reduction gear is sleeved and fixed on the outside of the rotating shaft and is meshed with the reduction gear shaft.

[0014] The present invention achieves the following technical advantages over the prior art:

[0015] This utility model provides a dedicated ROV-driven submersible throttle valve for emergency well sealing. The valve body has an axial mounting channel at its bottom, providing an installation position for the bottom-mounted valve seat assembly. This avoids the need for complete disassembly of the throttle valve. The valve seat compression sealing connection ensures a tight seal between the valve body and the valve seat, reducing the risk of fluid leakage. A locking element tightly connected to the bottom opening of the axial mounting channel securely fixes the valve seat to the valve body, preventing loosening or displacement during operation and ensuring normal operation of the throttle valve. Hot-press assembly creates a tight and stable fit between the valve core and valve seat, improving the sealing performance and operational stability. This effectively controls fluid flow and pressure, enhancing the throttle valve's performance. The valve cover, mounted on top of the valve body, protects internal components, preventing external impurities from entering and affecting normal operation. It also provides a mounting base for other components (such as the valve stem and pointer display mechanism). The valve stem can move accurately within the valve seat and valve core cavity, thereby achieving precise adjustment of the throttle valve opening. The valve stem passes through the valve cover for easy connection to an external drive mechanism to receive power and control its movement. Using an ROV drive wrench, the drive shaft can be remotely driven to rotate, and a conversion component converts this rotation into linear movement of the valve stem, enabling precise remote control of the throttle valve's opening and closing actions. This meets the emergency operation requirements of deep-sea environments, improving operational flexibility and efficiency. A pointer on the indicator panel displays the opening percentage, providing a real-time and intuitive display of the throttle valve's on / off status. Operators can remotely observe the pointer's position on the indicator panel to quickly and accurately understand the throttle valve's operating status, facilitating timely adjustments, reducing the risk of misoperation, and improving the convenience and reliability of equipment operation and management. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1A schematic diagram of the structure of the emergency well sealing ROV-driven underwater throttle valve provided by this utility model;

[0018] Figure 2 A cross-sectional view of the bottom-mounted valve seat assembly of the emergency well sealing ROV-driven submersible throttle valve provided by this utility model;

[0019] Figure 3 A schematic diagram showing the unfolded structure of the pointer display device in the emergency well sealing ROV-driven underwater throttle valve provided by this utility model;

[0020] Figure 4 A schematic diagram of the ROV drive mechanism in the emergency well sealing ROV-driven underwater throttle valve provided by this utility model;

[0021] In the diagram: 1. Bottom-mounted valve seat assembly; 2. Pointer-type visual switch display mechanism; 3. ROV drive mechanism; 101. Locking nut; 102. Buffer gasket; 103. Valve body; 104. Wear-resistant gasket; 105. Snap ring; 106. Screw; 107. First sealing ring; 108. Valve core; 109. Valve seat; 110. Second sealing ring; 111. Valve stem; 201. Pointer; 202. Indicator plate; 203. Second reduction gear; 204. Reduction gear shaft; 205. First reduction gear; 206. Drive shaft; 301. ROV drive wrench; 302. Anti-torque socket; 303. ROV adapter; 304. Positioning pin; 305. Sealing gland; 306. Guide key; 307. Valve cover. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] The purpose of this invention is to provide a dedicated ROV-driven underwater throttle valve for emergency well sealing, which solves the problems existing in the prior art. It has a simple structure, is easy to use and maintain, and effectively saves deployment costs.

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] This embodiment provides a special ROV-driven submersible throttle valve for emergency well sealing, such as... Figures 1-4As shown, the system includes: a valve body 103, an undermount valve seat assembly 1, a valve core 108, a valve cover 307, a valve stem 111, an ROV drive mechanism 3, and a pointer-type visual switch display mechanism 2. The bottom of the valve body 103 has an axial mounting channel. The undermount valve seat assembly 1 includes a valve seat 109 and a locking element. The valve seat 109 is press-sealed within the axial mounting channel, and the locking element is tightly connected to the bottom opening of the axial mounting channel. The valve core 108 is hot-pressed into the inner cavity of the valve seat 109. The valve cover 307 is mounted on the top of the valve body 103. One end of the valve stem 111 moves within the inner cavities of the valve seat 109 and the valve core 108, while the other end passes through the valve cover 307. The ROV drive mechanism 3 includes an ROV drive wrench 301, a drive shaft 206, and a conversion assembly. The ROV drive wrench 301 has its fixed end fixedly connected to the valve cover 307, and its output end connected to the drive shaft 206 to drive the drive shaft 206 to rotate. The end of the drive shaft 206 away from the ROV drive wrench 301 is connected to the valve stem 111 via a conversion assembly to convert the rotation of the drive shaft 206 into linear movement of the valve stem 111. The pointer-type visual switch display mechanism 2 includes a rotating shaft, a pointer 201, and an indicator 202. One end of the pointer 201 is fixedly connected to the rotating shaft, and the indicator 202 is fixedly connected to the outside of the valve cover 307. The rotating shaft is connected to the drive shaft 206 to drive the pointer 201 to rotate, and the value indicated by the pointer 201 on the indicator 202 corresponds to the on / off state of the throttle valve. An axial mounting channel is provided at the bottom of the valve body 103. The bottom-mounted valve seat assembly 1 provides an installation position, avoiding the need for complete disassembly of the throttle valve. The compression sealing connection of the valve seat 109 ensures the sealing between the valve body 103 and the valve seat 109, reducing the risk of fluid leakage. A locking element tightly connected to the bottom opening of the axial mounting channel securely fixes the valve seat 109 to the valve body 103, preventing loosening or displacement during operation and ensuring normal operation of the throttle valve. Hot-press assembly creates a tight and stable fit between the valve core 108 and the valve seat 109, improving the sealing performance and operational stability between them. This effectively controls fluid flow and pressure, enhancing the throttle valve's performance. The valve cover 307 is mounted on top of the valve body 103, protecting internal components and preventing external impurities from entering the valve body 103 and affecting normal equipment operation. It also provides a mounting base for other components (such as the valve stem 111 and the pointer 201 display mechanism). The movement of valve stem 111 within the valve seat 109 and valve core 108 precisely controls the throttling orifice area of ​​valve seat 109 and valve core 108, thereby achieving precise adjustment of the throttling valve opening. Valve stem 111 passes through valve cover 307 for easy connection to an external drive mechanism to receive power and achieve movement control of valve stem 111.The ROV-driven wrench allows for remote rotation of the drive shaft 206, which is then converted into linear movement of the valve stem 111 via a conversion component. This enables precise remote control of the throttle valve's opening and closing, meeting emergency operation requirements in deep-sea environments and improving operational flexibility and efficiency. The pointer 201 indicates the opening percentage on the indicator panel, providing a real-time and intuitive display of the throttle valve's status. Operators can remotely observe the pointer 201's position on the indicator plate 202 to quickly and accurately understand the throttle valve's operating status, facilitating timely adjustments, reducing the risk of misoperation, and improving the convenience and reliability of equipment operation and management.

[0027] In a preferred embodiment, the locking element is a locking nut 101. The bottom opening of the axial mounting channel has an internal thread, and the locking nut 101 has an external thread, so that the locking nut 101 is threadedly connected to the bottom opening of the axial mounting channel. The locking nut 101 is rotatably connected to the valve seat 109. The threaded connection facilitates installation and disassembly, making it easy to maintain and replace the valve seat 109 assembly. Simultaneously, the rotatable connection design ensures the valve seat 109 is fixed while preventing damage to the first sealing ring 107 and the second sealing ring 110 during installation and disassembly, ensuring sealing performance and improving the maintainability and service life of the equipment.

[0028] In a preferred embodiment, a retaining ring 105 is further included. A first annular groove is provided at the end of the valve seat 109 near the locking nut 101, and a second annular groove is provided at the end of the locking nut 101 near the valve seat 109. One end of the retaining ring 105 is fitted into the first annular groove, and the other end is fitted into the second annular groove, allowing the valve seat 109 to be rotatably connected to the locking nut 101. A gap is provided between the valve seat 109 and the locking nut 101, within which a wear-resistant gasket 104 is placed. The retaining ring 105 further enhances the stability of the rotatable connection between the valve seat 109 and the locking nut 101, preventing damage to the first sealing ring 107 and the second sealing ring 110 during the assembly and disassembly of the valve seat 109. This extends the service life of the components and ensures long-term stable operation of the equipment.

[0029] In a preferred embodiment, the retaining ring 105 includes two half-rings and multiple screws 106. The two half-rings are connected by the screws 106 to form the retaining ring 105. The two half-rings are assembled into the retaining ring 105 structure, which is convenient for installation and disassembly. During on-site maintenance, the retaining ring 105 can be assembled and disassembled by removing and installing the screws 106 without the need for complicated operating tools and procedures, making equipment maintenance more convenient and efficient and reducing maintenance costs.

[0030] In a preferred embodiment, a buffer pad 102 is further included. The locking nut 101 is provided with a limit ring 105. The buffer pad 102 is disposed on the side of the valve core 108 facing the locking nut 101 to prevent the valve stem 111 from damaging the valve core 108 due to excessive torque when the throttle valve is closed. The buffer pad 102 can play a buffering role when the valve stem 111 is closed, reducing the impact force between the valve stem 111 and the valve core 108, protecting the valve core 108 from damage, extending the service life of the components, and ensuring the stability and reliability of the throttle valve during the closing process. In a preferred embodiment, the bottom-mounted valve seat assembly 1 further includes a first sealing ring 107 and a second sealing ring 110. The valve seat 109 has a first annular groove and a second annular groove at both ends. The first sealing ring 107 is disposed in the first annular groove, and the second sealing ring 110 is disposed in the second annular groove so that the valve seat 109 and the valve body 103 are squeezed and sealed. The double sealing ring design further enhances the sealing performance between the valve seat 109 and the valve body 103, effectively preventing fluid leakage at the connection between the valve seat 109 and the valve body 103, improving the sealing performance of the throttle valve, ensuring the safe and stable operation of the equipment in the deep-sea high-pressure environment, and reducing various problems that may be caused by leakage.

[0031] In a preferred embodiment, the conversion assembly includes an adapter section, a threaded section, a guide key 306, and a sealing cap 305. The adapter section is integrally connected to the end of the drive shaft 206 away from the ROV drive wrench 301 and has a threaded hole. The threaded section is integrally connected to the end of the valve stem 111 away from the valve core 108 and is used for threaded connection to the threaded hole. The sealing cap 305 is sealed and fixedly connected to the valve cover 307 and has a guide groove. The guide key is integrally connected to the outside of the valve stem 111, and the guide key 306 is slidably connected in the guide groove. The structural design of the conversion assembly can accurately convert the rotation of the drive shaft 206 into the linear movement of the valve stem 111, ensuring the accuracy and stability of the transmission. At the same time, the cooperation between the sealing cap 305 and the guide key 306 achieves both sealing and ensures that the valve stem 111 only moves linearly, improving the accuracy and reliability of the throttle valve drive control.

[0032] In a preferred embodiment, the ROV drive mechanism 3 further includes a counter-torque socket 302, an ROV adapter 303, and a positioning pin 304. The counter-torque socket 302 is fixed to the valve cover 307 and connected to the fixed end of the ROV drive wrench 301. One end of the ROV adapter 303 is fixedly connected to the ROV drive wrench 301, and the other end is connected to the top end of the drive shaft 206 via the positioning pin 304. The counter-torque socket 302 can counteract the reaction force generated when operating the ROV drive wrench, ensuring the stability and accuracy of the drive process. The cooperation between the ROV adapter and the positioning pin 304 makes the power transmission more stable and accurate, ensuring that the ROV drive mechanism can reliably transmit power to the drive shaft 206, thereby achieving effective control of the throttle valve.

[0033] In a preferred embodiment, the device further includes a first reduction gear 205, a reduction gear shaft 204, and a second reduction gear 203. The reduction gear shaft 204 is rotatably connected to the valve cover 307. The first reduction gear 205 is sleeved and fixed on the outside of the reduction gear shaft 204 and meshes with the drive shaft 206. The second reduction gear 203 is sleeved and fixed on the outside of the rotating shaft and meshes with the reduction gear shaft 204. Through the two-stage reduction gear transmission, the rotational speed of the drive shaft 206 can be appropriately reduced, so as to more accurately control the rotational speed and position of the pointer 201, thereby more accurately indicating the opening and closing status of the throttle valve and enhancing the accuracy and stability of the pointer-type visual switch display mechanism 2.

[0034] Example 2

[0035] This embodiment provides a method for using an emergency well sealing ROV-driven submersible throttle valve as described in Embodiment 1;

[0036] Installation preparation

[0037] Determine the installation location: Based on the layout of the offshore oil and gas exploration platform and the needs of emergency well sealing operations, determine the specific installation location of the subsea throttle valve on the water or oil pipeline, ensuring that the installation location is convenient for subsequent maintenance and operation, and does not affect the normal operation of the pipeline.

[0038] Check component integrity: Before installation, carefully inspect all components, including valve body 103, under-mount valve seat assembly 1, valve core 108, valve cover 307, valve stem 111, ROV drive mechanism and pointer-type visual switch display mechanism 2, etc., to ensure that no component is damaged or missing, and check the integrity of the seals to avoid the risk of leakage.

[0039] Cleaning and Protection: Clean all connecting and mating surfaces of the components to be installed, removing any oil, impurities, etc. For components requiring corrosion protection, perform the necessary protective treatments as specified to improve the equipment's corrosion resistance in deep-sea environments.

[0040] Detailed installation steps

[0041] Undermount valve seat assembly 1 installation

[0042] Slowly insert the valve seat 109 into the axial mounting channel at the bottom of the valve body 103 to ensure that the valve seat 109 is correctly positioned and squeezed and sealed with the axial mounting channel to ensure good sealing performance.

[0043] Place the wear-resistant gasket 104 into the gap between the valve seat 109 and the locking nut 101, and then fit the two ends of the retaining ring 105 into the first annular groove of the valve seat 109 and the second annular groove of the locking nut 101 respectively. Use screws 106 to connect and tighten the two half rings of the retaining ring 105.

[0044] Screw the externally threaded locking nut 101 into the internal thread at the bottom opening of the axial mounting channel to ensure that the locking nut 101 is rotatably connected to the valve seat 109 and that the connection is firm and reliable.

[0045] The first sealing ring 107 and the second sealing ring 110 are respectively installed in the first annular groove and the second annular groove at both ends of the valve seat 109 to further enhance the sealing between the valve seat 109 and the valve body 103.

[0046] Valve core 108 installation: The valve core 108 is installed into the inner cavity of the valve seat 109 by hot pressing assembly to ensure a firm installation.

[0047] Valve cover 307 installation: Accurately install valve cover 307 on top of valve body 103 to complete the connection and fixation, providing a reliable foundation for subsequent installation of other components.

[0048] Valve stem 111 installation: One end of valve stem 111 is slidably connected to valve core 108, so that valve stem 111 can move within valve core 108 and valve seat 109, and the other end passes through valve cover 307 to ensure that valve stem 111 can move freely in a straight line.

[0049] ROV drive mechanism installation

[0050] The anti-torque socket 302 is fixed to the valve cover 307 and connected to the fixed end of the ROV drive wrench to counteract the reaction force during operation.

[0051] One end of the ROV adapter is fixedly connected to the ROV drive wrench, and the other end is connected to the top of the drive shaft 206 through the positioning pin 304 to ensure smooth and accurate power transmission.

[0052] The adapter section is integrally connected to the end of the drive shaft 206 away from the ROV drive wrench, and a threaded hole is provided on the adapter section. The threaded section is integrally connected to the end of the valve stem 111 away from the valve core 108, and the threaded section is threadedly connected to the threaded hole on the adapter section.

[0053] The sealing gland 305 is sealed and fixedly connected to the valve cover 307, while the guide key 306 on the outside of the valve stem 111 slides into the guide groove provided in the sealing gland 305, ensuring the linear movement of the valve stem 111 and guaranteeing the sealing performance.

[0054] Pointer-type visual switch display mechanism 2 installation

[0055] The reduction gear shaft 204 is rotatably connected to the valve cover 307, the first reduction gear 205 is sleeved and fixed on the outside of the reduction gear shaft 204, and the first reduction gear 205 is meshed with the drive shaft 206.

[0056] The second reduction gear 203 is sleeved and fixed on the outside of the rotating shaft, and at the same time, the second reduction gear 203 meshes with the reduction gear shaft 204.

[0057] One end of the pointer 201 is fixedly connected to the rotating shaft, and the indicator plate 202 is fixed on the outside of the valve cover 307 to ensure that the pointer 201 can accurately indicate the opening and closing status of the throttle valve on the indicator plate 202.

[0058] Operation and maintenance

[0059] Remote command transmission: In emergency well sealing and other operational scenarios, operators can transmit manual or preset commands to the ROV from the control room via remote fiber optic / cable.

[0060] ROV Drive Operation: After receiving a command, the ROV's robotic arm operates the ROV drive wrench. The fixed end of the ROV drive wrench remains stable due to its fixed connection with the valve cover 307, while the output end drives the drive shaft 206 to rotate.

[0061] The linear displacement of the valve stem 111 enables throttle valve adjustment: During the rotation of the drive shaft 206, the rotation is converted into linear movement of the valve stem 111 through a conversion component. The valve stem 111 moves within the valve seat 109 and the inner cavity of the valve core 108, thereby adjusting the opening of the throttle valve to meet the control requirements of fluid flow and pressure in emergency operations.

[0062] Real-time monitoring of switch status: As the drive shaft 206 rotates, the rotating shaft is driven to rotate through a two-stage reduction gear transmission, and the pointer 201 rotates accordingly. The value indicated by the pointer 201 on the indicator plate 202 corresponds to the switch status of the throttle valve, which allows operators to remotely monitor the working status of the throttle valve in real time and make timely adjustments.

[0063] Maintenance and care

[0064] Regularly inspect the seals: Regularly inspect the first sealing ring 107 and the second sealing ring 110 between the valve seat 109 and the valve body 103. If there are signs of wear or aging, replace them in time to ensure the sealing of the throttle valve and prevent fluid leakage in the deep sea environment.

[0065] Component wear inspection: Inspect the wear of key components such as valve seat 109, valve core 108, valve stem 111, and locking nut 101, especially the contact surfaces between valve stem 111 and guide groove, and between valve core 108 and valve seat 109. If there is obvious wear, repair or replace the damaged parts in time to ensure the normal operation of each component.

[0066] Inspection of transmission components: Inspect the transmission components in the ROV drive mechanism and the pointer-type visual switch display mechanism 2, such as gears, threaded connections, and locating pins 304, to ensure that all transmission components are firmly connected and well lubricated. If any are loose or worn, tighten or replace them in time to ensure the accuracy of power transmission and status display.

[0067] Remote monitoring system maintenance: Regularly inspect and maintain the remote fiber optic / cable transmission system to ensure the accuracy and timeliness of command transmission and guarantee the reliability of remote operation.

[0068] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A special ROV-driven submersible throttle valve for emergency well sealing, characterized in that: include: Valve body (103), the bottom of which is provided with an axial mounting channel; The undermount valve seat assembly (1) includes a valve seat (109) and a locking member. The valve seat (109) is press-sealed into the axial mounting channel, and the locking member is tightly connected to the bottom opening of the axial mounting channel. Valve core (108), which is hot-pressed into the inner cavity of the valve seat (109); A valve cover (307) is mounted on top of the valve body (103); A valve stem (111), one end of which moves within the valve seat (109) and valve core (108), and the other end passes through the valve cover (307); ROV drive mechanism (3), the ROV drive mechanism (3) includes ROV drive wrench (301), drive shaft (206) and conversion component. The fixed end of the ROV drive wrench (301) is fixedly connected to the valve cover (307). The output end of the ROV drive wrench (301) is connected to the drive shaft (206) to drive the drive shaft (206) to rotate. The end of the drive shaft (206) away from the ROV drive wrench (301) is connected to the valve stem (111) through the conversion component to convert the rotation of the drive shaft (206) into the linear movement of the valve stem (111). A pointer-type visual switch display mechanism (2) includes a rotating shaft, a pointer (201), and an indicator plate (202). One end of the pointer (201) is fixedly connected to the rotating shaft, and the indicator plate (202) is fixedly connected to the outside of the valve cover (307). The rotating shaft is connected to the drive shaft (206) to drive the pointer (201) to rotate. The value indicated by the pointer (201) on the indicator plate (202) corresponds to the on / off state of the throttle valve.

2. The emergency well sealing ROV-driven submersible throttle valve according to claim 1, characterized in that: The locking component is a locking nut (101). The bottom opening of the axial mounting channel is provided with an internal thread, and the locking nut (101) is provided with an external thread, so that the locking nut (101) is threadedly connected to the bottom opening of the axial mounting channel, and the locking nut (101) is rotatably connected to the valve seat (109).

3. The emergency well sealing ROV-driven submersible throttle valve according to claim 2, characterized in that: It also includes a retaining ring (105). The valve seat (109) is provided with a first annular groove at one end near the locking nut (101), and the locking nut (101) is provided with a second annular groove at one end near the valve seat (109). One end of the retaining ring (105) is sleeved and engaged in the first annular groove, and the other end is sleeved and engaged in the second annular groove, so that the valve seat (109) and the locking nut (101) are rotatably connected, and a gap is provided between the valve seat (109) and the locking nut (101), and a wear-resistant gasket (104) is placed in the gap.

4. The emergency well sealing ROV-driven submersible throttle valve according to claim 3, characterized in that: The retaining ring (105) includes two half-rings and a plurality of screws (106), and the two half-rings are connected to form the retaining ring (105) by the screws (106).

5. The emergency well sealing ROV-driven submersible throttle valve according to claim 4, characterized in that: It also includes a buffer pad (102), the locking nut (101) is provided with a limit ring (105), and the buffer pad (102) is provided on the side of the valve core (108) facing the locking nut (101) to prevent the valve stem (111) from damaging the valve core (108) due to excessive torque when the throttle valve is closed.

6. The emergency well sealing ROV-driven submersible throttle valve according to claim 5, characterized in that: The undermount valve seat assembly (1) further includes a first sealing ring (107) and a second sealing ring (110). The valve seat (109) has a first annular groove and a second annular groove at both ends. The first sealing ring (107) is disposed in the first annular groove, and the second sealing ring (110) is disposed in the second annular groove so that the valve seat (109) and the valve body (103) are squeezed and sealed.

7. The emergency well sealing ROV-driven submersible throttle valve according to claim 6, characterized in that: The conversion assembly includes an adapter section, a threaded section, a guide key (306), and a sealing cap (305). The adapter section is integrally connected to the end of the drive shaft (206) away from the ROV drive wrench (301) and has a threaded hole. The threaded section is integrally connected to the end of the valve stem (111) away from the valve core (108) and is used for threaded connection to the threaded hole. The sealing cap (305) is sealed and fixedly connected to the valve cover (307). The sealing cap (305) has a guide groove. The guide key is integrally connected to the outside of the valve stem (111), and the guide key (306) is slidably connected in the guide groove.

8. The emergency well sealing ROV-driven submersible throttle valve according to claim 7, characterized in that: The ROV drive mechanism (3) also includes a torque counter-torque socket (302), an ROV adapter (303), and a positioning pin (304). The torque counter-torque socket (302) is fixed to the valve cover (307) and connected to the fixed end of the ROV drive wrench (301). One end of the ROV adapter (303) is fixedly connected to the ROV drive wrench (301), and the other end is connected to the top end of the drive shaft (206) through the positioning pin (304).

9. The emergency well sealing ROV-driven submersible throttle valve according to claim 8, characterized in that: It also includes a first reduction gear (205), a reduction gear shaft (204), and a second reduction gear (203). The reduction gear shaft (204) is rotatably connected to the valve cover (307). The first reduction gear (205) is sleeved and fixed on the outside of the reduction gear shaft (204) and meshes with the drive shaft (206). The second reduction gear (203) is sleeved and fixed on the outside of the rotating shaft and meshes with the reduction gear shaft (204).

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